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PROCEEDINGS
OF THE
CALIFORNIA ACADEMY OF SCIENCES
FOURTH SERIES
Vor
Part One
1913-1917
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SAN FRANCISCO
PUBLISHED BY THE ACADEMY
[ 1926 }
COMMITTEE ON PUBLICATION
Georce C. Epwarps, Chairman
C. E. Grunsky Epwin C. Van Dyke
BarTON WARREN EVERMANN, Editor
CONTENTS OF VOLUME II, PART ONE
Pirates I—CXXIV
Title-page -..-------2------ece----ccseceeneronenssensenenesenecnseneeenenteanenerensenssereasacsncsasaesnasmesomenecesras i
CGTIRe TES so ne A ooo ets, ltl
Expedition of the California Academy of Sciences
to the Galapagos Islands, 1905-1906
No. VIII. The Birds of the Galapagos Islands, with Observations on
the Birds of Cocos and Clipperton Islands (Columbi-
formes to Pelecaniformes). By Edward Winslow
Gifford’) (Plates i 1 — Vil) ean caecem cw veecsecncanen se teretereesearcee I
(Published August 11, 1913)
No. IX. The Galapagoan Lizards of the Genus Tropidurus; with
Notes on the Iguanas of the Genera Conolophus and
Amblyrhynchus. By John Van Denburgh and Joseph
Re Slevin® (Plates) Wi xa) eee ae cererecrecece sem enssorenenweeae 133
(Published September 19, 1013)
No. X. The Gigantic Land Tortoises of the Galapagos Archipelago.
By John Van Denburgh. (Plates XII—CXXIV)............ 203
(Published September 30, 1914)
No. XI. Preliminary Descriptions of New Species of Pulmonata of
the Galapagos Islands. By William Healey Dall_.......... 375
(Published December 31, 1917)
December 13, 1926.
PROCEEDINGS
OF THE
CALIFORNIA ACADEMY OF SCIENCES
FourtH SERIES
Vor ii Pr ipp) l-l32siplssl7 Aucust 11, 1913
EXPEDITION OF THE CALIFORNIA ACADEMY OF
SCIENCES TO THE GALAPAGOS
ISLANDS, 1905-1906
VIII
THE BIRDS OF THE GALAPAGOS ISLANDS, WITH OBSER-
VATIONS ON THE BIRDS OF COCOS AND CLIPPERTON
ISLANDS (COLUMBIFORMES TO PELECANIFORMES)
BY EDWARD WINSLOW GIFFORD
Assistant Curator of the Department of Ornithology
The Expedition of the California Academy of Sciences to
the Galapagos Islands was planned and organized through the
untiring efforts of Mr. Leverett Mills Loomis, Director of the
Museum of the Academy. Fortunately for the Academy, the
Expedition was in the archipelago at the time of the San Fran-
cisco earthquake and fire of April, 1906. All of the collec-
tions of the Academy in San Francisco were destroyed in that
catastrophe, so that the material gathered by the Galapagos
Expedition formed the nucleus for the present extensive col-
lections of the Academy, which have likewise been accumu-
lated under the direction of Mr. Loomis. The collection of
greatest bulk and importance brought back by the Expedition
was, without doubt, the reptile collection, for which the Expe-
dition was primarily organized. The bird collection was also
August 8, 1913
2 CALIFORNIA ACADEMY OF SCIENCES (Proc. 47H Ser.
of large size, skins alone numbering 8,691. The unqualified
success of the Expedition as a whole was unquestionably due
to the ability and sagacity of its leader, Mr. R. H. Beck.
The personnel of the Expedition was as follows: R. H.
Beck, chief; Alban Stewart, botanist; F. X. Williams, ento-
mologist; W. H. Ochsner, geologist and conchologist; J. R.
Slevin, herpetologist; J. S. Hunter and E. W. Gifford,
ornithologists; E. S. King, assistant herpetologist; F. T.
Nelson, mate; J. J. Parker, navigator; J. W. White, cook.
The scientific members of the Expedition shipped in the
capacity of seamen, so that in addition to collecting, the duties
attending the working of the vessel likewise fell in a large
measure to their lot.
The schooner “Academy,” of eighty-seven tons burden,
sailed with the Expedition from San Francisco on June 28,
1905, returning on November 29, 1906, after an absence of
seventeen months and one day. During the southward voyage
ten stops were made, while on the home voyage from Culpep-
per, Galapagos Islands, to San Francisco none were made. The
home voyage was a slow one of sixty-five days. On the
voyage south, short stops were made during the month of
July, 1905: at Ensenada, San Martin Island, San Geron-
imo Island, San Benito Islands, Cerros Island, and
Natividad Island, Baja California; and at San _ Bene-
dicto and Socorro, Revilla Gigedo Islands. August
10 was spent on Clipperton Island, Mexico, which was
reached only after many days of beating against contrary
winds and currents. The early part of September, 1905, was
spent at Cocos Island, Costa Rica. On September 13, the
schooner set sail from Cocos with the Galapagos Islands as
her destination. No intermediate stop was made; although
two days were spent sailing down the coast of Ecuador from
Perdenales in the Province of Esmeraldas, to Manta and Cape
San Lorenzo. At Manta, on September 19, the schooner was
put on the westward tack, and stood out along the north coast
of the great headland. Hood Island, the southernmost of the
Galapagos group, was reached at 9 A. M., September 24, after
less than four days’ voyage from Manta.
When calm weather afforded the opportunity, a great deal
of collecting was done on the ocean, both on the outward voy-
age and on the homeward voyage, during our numerous jour-
Vor. II, Pr. 1] GIFFORD—BIRDS OF THE GALAPAGOS ISLANDS 3
neys from island to island, and also during two extended
cruises to the southward of the Galapagos group. Only
islands of the Galapagos group, however, are included in the
enumeration at the head of the account of each species. In
order to give a clear conception of the amount of time and
the time of year spent on each island, the following table has
been prepared:
DAYS SPENT ON THE VARIOUS ISLANDS OF THE
GALAPAGOS GROUP
Se |S les) eased (03 Bo] eS) eh ta
ay B26 |2/A S82 |= | 2/2 /2/3] 283) é
Abingdon ...........+. PA ie eel | abs evga Pad Balled pele cel GUIBEG
Albemarle ............ eo 27125) 3 PSHE Se les2
Barrington ........... Breed en lees tse Gl eves na (ee Leas) Neh eo Ut
Bindloe ............-. See teen EN tl Ce Ie Bel ee labeouf i
[Dike So vodomogNoanne SA eA eee ES Deal) ANGORA ef
Champion ............ Dorel Nes Tey an i el cel ee see le Ae
Charles ........2..... ed ey OC ek PATS AIDS eRe? RS Lee i)
Chatham 15.05.22... </s1- Saal Pan boal(24)| 2Ullaeel eae Ss ed | Olle ee RS}
Cowley). 2 )-/-..21-2.-'\010)6 Berl alae ba dloelles slonelaee Boi Pi PR a i el
Gulpeppery sejertsie\sisie sire est Eas] el ee otal aaa eee el cele ered honlall tua
Da plimeneycaliels srevayeyerescie PA tees GTS eyo ley sl eeesea el etc (eae est
IDYebateaia Adlon domponaogee Artal ered eI evel bh Ra Me Meel N T K
Einrdenbiyil eevee nels cimisis wfepal| ie avel| ta ayes tees | eral eter arayell eae inte Hiatt [Arora ener (ut
Gardner-nearsCharlesia.( |) Il |e s (erie eral vee Fe eel [skys 1
Hood & Gardner-near-
ETO Oduraaiievaiste arn cis seve’ Ue \i2 1/6 SAE IS Rete 27
Indefatigable) s....54...% crore Aa |P2 Sh epee PLL a ey eee 53
NATE SMa creer cve/ohercters Ravel oes ct eseves Lia | eis tetera oteyall eteysl|lsraveleisre| oy [Obie es|| oul
ISRESG IEE sagen aoc os nota steel arava IA cnet lovee orev lfesetell (siete edat=| siets | ecceellea-ei||2 04
Narborough oec.ics se auegal| etal fapsiel| cheval kere lteyevel| lin [hidial| (seve eters] Setslerllisisiel) AS
OnSlowAececeenies noe BOA SS|lasslad-cl bol LAB ates ae ete ce eeceel ees] laa
SevIMOUn ese secoegee cee esate | fa evens Seva rete Iccevellieieteil’ecote | dievs || Del] evened stencil a4
PRO WET eet nlee Neccorrieis fees SAF eve lesa Gl Sion oo fsigal eere Ae spallesel Selayeval eecre| SOs RS
‘Wigan Gil oem eer ome Re crcl [bit Late ispeqellletere |teiese aaueilfoletel| Gresal| waeaed tates LL 1
In spite of the fact that more time was spent on Albemarle
and Indefatigable islands than on any others, the most work
remains to be done on those two islands. On Albemarle
Island, Banks Bay Mountain, Cowley Mountain, and Iguana
Cove Mountain yet remain to be climbed and explored—the
last being the loftiest in the archipelago. The vast upland
country of Indefatigable Island is in a similarly unexplored
state. A third large island, Narborough, is practically un-
touched. All of the low country and the greater part of the
mountain slopes of this island are lava wastes. High up on
4 CALIFORNIA ACADEMY OF SCIENCES [Proc. 47H Ser.
.
the south side, however, there is considerable fertile green
country. It was there that Mr. Beck found a very distinct
new species of tortoise, Testudo phantasticus. As far as birds
were concerned, not a single specimen was obtained there.
The reasons for the failure of the Expedition properly to
explore the mountains on Indefatigable, Albemarle, and Nar-
borough islands, were primarily lack of pack animals, and
secondarily lack of proper shelter from the drenching rains
and fogs of the mountains. Nevertheless, the collections
brought back are more extensive than any heretofore obtained.
New territory was explored, and in some instances long jour-
neys of three and four days’ duration were made. For in-
stance, on southeastern Albemarle the interior was penetrated
for a distance of thirty miles.
The physical characteristics of the Galapagos Islands have
been so well described by Messrs. Stewart and Williams in
papers of this same series that the reader is referred to their re-
marks,’ for the writer has nothing additional to offer. Mr.
Stewart’s classification of botanical regions has been followed
in this paper. In the second part the matter of botanical re-
_ gions in relation to the birds will be taken up.
Mr. Stewart likewise furnishes a good description of the
physical characteristics of Cocos Island,* the bird-fauna of
which is here treated along with that of the Galapagos Islands.
The coral atoll of Clipperton has no land-birds, and hence but
little interest attaches to it in connection with a study of the
birds of Cocos and the Galapagos Islands. A description of
Clipperton Island is omitted, although accounts of the birds
are given along with those of Cocos Island and the Galapagos
group. For an excellent description of Clipperton the reader
is referred to Messrs. Snodgrass and Heller’s paper on The
Birds of Clipperton and Cocos Islands.*
For the sake of convenience, Dr. Sharpe’s Hand-List of
Birds has been followed in the matter of names and sequence
of species throughout this paper. The seven species of petrels
known to occur among the islands are to be treated by Mr.
Loomis in a separate paper.
See Stewart, A Botanical Survey of the Galapagos Islands, Proc. Calif. Acad.
Sci., 4th ser., v. 1, pp. 206-245; and Williams, The Butterflies and Hawk-Moths of
the Galapagos Islands, Proc. Calif. Acad. Sci., 4th ser., v. 1, pp. 290-296.
2See Stewart, Notes on the Botany of Cocos Island, Proc. Calif. Acad. Sci.,
4th ser., v. 1, pp. 375-383.
8Proc. Wash. Acad. Sci., v. 4, pp. 501-504.
Vor. II, Pr. I] GIFFORD—BIRDS OF THE GALAPAGOS ISLANDS 5
In the few places where moults and plumages have been dis-
cussed, the plan followed is essentially Dr. Dwight’s as set
forth in various papers. A few changes in names of moults
and plumages were necessitated by the fact that the Galapagos
Islands are under the equator, and the word “winter’’ cannot
be used to advantage. The appended list gives the order of
plumages and moults. The unnumbered plumages and moults
placed in square brackets are those peculiar to certain birds,
such as some of the Galliformes, the Procellariiformes, the
Lariformes, the Phenicopteriformes, and the Anseriformes.
Wherever the nomenclature differs from that of Dr. Dwight,
his is placed in parentheses.
1. Natal Plumage.
2. Postnatal Moult.
[Second Downy or Postnatal Plumage.]
[Prejuvenal Moult.]
3. Juvenal Plumage.
4. Postjuvenal Moult.
[Preliminary Postjuvenal Plumage (Dwight’s First Win-
ter Plumage—Preliminary).]
[Supplementary Postjuvenal Moult.]
Postjuvenal Plumage (Dwight’s First Winter Plumage; also
his First Winter Plumage—Supplementary).
First Prenuptial Moult.
First Nuptial Plumage.
First Postnuptial Moult.
[First Preliminary Postbreeding Plumage (Dwight’s Sec-
ond or Adult Winter Plumage—Preliminary; Eclipse
Plumage).]
[First Supplementary Postnuptial Moult.]
9. First Postbreeding Plumage (Dwight’s Second Winter
Plumage; also his Second or Adult Winter Plumage—
Supplementary).
10. Second Prenuptial Moult.
11. Second Nuptial Plumage.
12. Second Postnuptial Moult.
COON Oe
The following remarks are necessary in regard to the meas-
urements given. Lengths and extents were taken in the field
from specimens before skinning. Wing-measurements are
from the “bend” or carpal joint to the tip of the longest
primary, the rule being laid along the outer or convex side, and
the wing brought up close to it for its entire length. In four
cases (Nesopelia galapagoensis, Creciscus spilonotus, Gallinula
galeata, and Spheniscus mendiculus), however, the wing was
measured with dividers, one point resting against the anterior
side of the bend, the other touching the extremity of the long-
est primary.
6 CALIFORNIA ACADEMY OF SCIENCES [Proc. 4TH Ser.
Mr. Ridgway’s 4A Nomenclature of Colors was used in
determining colors.
In closing, I would say that since April 1, 1904, the day I
first began the study of ornithology, there has always been at
my hand a gentleman who has never withheld from me the
fruit of his own labors. To Mr. Leverett Mills Loomis, as
head of the Department and friend, I owe a deep debt of
gratitude. ;
Nesopelia galapagoensis: GaLApaGcos Dove
Abingdon, Albemarle, Barrington, Bindloe, Charles, Chat-
ham, Culpepper, Daphne, Duncan, Gardner-near-Charles,
Gardner-near-Hood, Hood, Indefatigable, James, Jervis, Nar-
borough, Seymour, Tower, and Wenman islands.
The Galapagos Dove was common on Hood, Gardner-near-
Hood, Duncan, James, and Abingdon islands. On Indefatig-
able Island it was abundant on the northwestern portion, and
common on other parts. On Duncan Island it appeared to be
restricted almost entirely to the floors of the two craters. On
the remaining islands it was not common—particularly on
Chatham, where it was decidedly rare.
The doves appeared to vary in abundance about the springs
and water-holes at different times of the year, being more
plentiful in the dry season than in the wet. During the latter
season they are no doubt dispersed more widely over the coun-
try on account of the generally distributed water-supply.
Except on Charles Island, this dove appeared to occur
almost entirely in the dry region of the islands. On that island,
however, it was found, in all but one instance, about the
springs in the rather humid interior. Its presence in the
moist region of southern Indefatigable seemed to be governed
by the weather; on warm, clear days it was met with, while
on overcast, rainy days it was not seen.
Specimens taken on Hood Island, September 25, 1905,
showed no particular enlargement of the reproductive organs.
Nevertheless, the organs of birds taken on Wenman Island,
September 24, 1906, were large, the breeding season for this
species being later in the northern than in the central and
southern islands—a point also noted in other species.
Vo. II, Pr. I] GIFFORD—BIRDS OF THE GALAPAGOS ISLANDS
I
Except on Wenman Island, the nests of this dove were in
small rocky cavities, usually in sloping ground. Eggs and
nests were noted as follows:
On April 4, near the top of Narborough Island, at an alti-
tude of about five thousand feet, Mr. Beck found a nest con-
taining one fresh egg. The nest was in a slight hollow in the
crevice of a cliff, and was lined with fern-stems and pieces of
grass.
On Wenman Island on September 24, 1906, two nests with
eggs were found—one with two fresh eggs, the other with
two that were incubated. The nests were slight depressions
in the ground, lined with grass and protected by the broad
leaves of cactus (Opuntia Helleri), the plants growing very
close to the ground. Mr. Hunter discovered a nest in a like
position, and Mr. Beck found one lined with twigs and simi-
larly sheltered on the edge of a sea-cliff. When flushed, the
owners of the nests fluttered away as though wounded.
Messrs. Snodgrass and Heller found a nest with one fresh
egg on James Island in April, and on Barrington Island they
found the doves nesting during the latter part of May.*
Messrs. Rothschild and Hartert make the following state-
ment: “‘Mr. Beck writes: ‘Nesopelia was nesting on Bind-
loe in the last week of March, and several deserted eggs were
found on Daphne.’ ’””
It appears that the breeding-season, taken as a whole
throughout the archipelago, extends over seven months, from
March to September inclusive.
On the rough lava of northeastern James Island, and on
the steep tufaceous sides of the larger Daphne Island, a great
many deserted nests, crudely lined with grass, were noted in
little cavities in the rocks, usually sheltered from the weather
by overhanging ledges or shelves.
Young of all ages were seen more or less commonly. On
September 19, 1906, Mr. Beck found a partially naked young
one, about a week and a half old, in a small cave on the south
side of Abingdon Island; while a young bird, scarcely from the
nest, was shot on Wenman Island on September 24, 1906.
Mr. Beck found two nests with young on the latter island.
One contained a naked nestling and an infertile egg, and the
1Proc. Wash. Acad. Sci., v. 5, p. 263.
2Nov. Zool., v. 9, p. 411.
8 CALIFORNIA ACADEMY OF SCIENCES [Proc. 47TH Ser.
other a pair of newly-hatched young. Several fully fledged
young birds were seen on Hood Island on July 1, and two
or three at Academy Bay on July 14. On northwestern Inde-
fatigable, July 21, quite a number were noted among the hun-
dreds of doves feeding about the grassy, tufaceous, coastal
region. Two were seen on the south side of Abingdon Island,
September 20 and 21, 1906.
The extreme lack of wariness of this species is undoubtedly
the cause of its scarcity on Charles, Chatham, and Albemarle
islands, where cats are common. On Chatham Island two
doves were taken on July 7, while they were feeding in the
wagon road. The next day the mutilated remains of one
freshly killed were noted beside the road, and also a large black
cat not far distant. Another specimen was taken on October
20. On Charles Island they were easy of approach, in spite
of the fact that that island has been much frequented by man.
From our experience, it would seem that this bird is rather
slow in recognizing its enemies. In fact, they were so unso-
phisticated that we noosed many, and caught many in hand-
nets. One day on Hood Island, Mr. King and I noosed twenty-
one. The nooses were of thread, and were fastened to the
ends of sticks six or eight feet long. The birds were followed
about until an opportune moment arrived, when the noose was
slipped over the head of one. We found we were more suc-
cessful when barefoot than when wearing shoes, as the noise
caused by the contact of shoes with rocks startled the birds.
The males proved warier than their mates. On northwestern
Indefatigable we killed a great many doves for food with
sticks and stones.
They were frequently seen during the day, sitting in the
trees and bushes and in the tree cactuses (Opuntia), and once
or twice, during rains, taking shelter beneath overhanging
rocks. During a brief interval of sunshine one day, on
Gardner-near-Hood, I observed a flock of a dozen or more
lying on their sides and stretching one wing up to sun them-
selves—a common habit among doves.
The daily flights of this bird seemed to take place chiefly in
the mornings and evenings, and were evidently made to and
from water and roosting-places. Single birds and straggling
flocks were seen. Perhaps the largest flight was noted at
James Bay, James Island, where, on the evenings of August 6
Vor. II, Pr. I] GIFFORD—BIRDS OF THE GALAPAGOS ISLANDS 9
and 7, scores flew by towards the black lava south of the bay.
They flew along the beach and over the water at an elevation
of twenty or thirty feet, some much higher, coming from the
direction of the lofty promontory at the north end of the bay.
Occasionally doves were seen flying from Hood Island to the
neighboring Gardner, and vice versa; and on July 25 two were
encountered at sea flying from Daphne towards Indefatigable.
On the ground, the gait of the Galapagos Dove was similar
to that of the Mourning Dove. Its flight, however, was
neither as swift nor as graceful. In alighting, a whistling
sound was often produced, apparently with the wings.
Their chief food was seeds and occasional pieces of green
grass. Once some were seen eating cactus pulp from a fallen
tree, and on another occasion several were seen feeding on the
ocean-beach among the mangroves.
When killed, considerable water sometimes escaped from
their mouths, as was also the case with Passerine Doves
(Chamepelia passerina) killed on Socorro, Revilla Gigedo
Islands. Their drinking places were found to be rather
varied. In some instances they were noted drinking from a
tank epiphyte (Tillandsia insularis) which grew in the transi-
tion and forested moist regions, and which sometimes con-
tained as much as a pint of water. On Bindloe Island they
quenched their thirst with the water that condensed about the
steam-holes in the craters. On other islands they resorted to
springs, ponds, and water-holes, although some of the last at
times contained rather salty water.
In passing from the plumage of the young bird, described
by Mr. Ridgway,’ into that of the adult, the first feathers of
the adult plumage to appear are the vinaceous-chocolate feath-
ers on the sides of the breast.
In nearly adult birds the last traces of immaturity are
shown by a few wood-brown feathers in the breast, by the
russet tips and edges of the alula, the primary coverts, and
the small feathers along the edge of the wing near the carpo-
metacarpal joint, and by the wood-brown edges of the second-
aries and tertiaries. In this stage the inner primaries of the
immature plumage are usually replaced by those of the adult
plumage, while the light rusty margins of the remaining old
primaries, characteristic of the young bird, are pretty well
1Proc. U. S. N. M., v. 19, p. 617.
10 CALIFORNIA ACADEMY OF SCIENCES (Proc. 4TH Ser.
worn off and faded. The primaries are therefore not renewed
entirely until the adult plumage is practically assumed in all
other particulars. Occasionally there are specimens in this
stage with old, worn, faded feathers in the forehead. The
Academy’s series of immature birds contains specimens in all
stages of moult.
The postnuptial renewal of the plumage is shown very well
by a series of birds from Duncan Island taken in August. A
similarly large series taken on that island in December is in
rather worn plumage, including primaries. Evidently there
is a partial prenuptial renewal of the plumage, for several of
these specimens show a few new feathers appearing about the
head, the neck, and the interscapular region. A few of the
specimens taken on Hood Island in latter September and early
October, 1905, give similar evidence. Several birds taken
there in early February have well-worn rectrices and remiges,
apparently evidencing that these feathers are moulted only
annually. These specimens show pin-feathers in the head,
breast, abdomen, and back. They are all females, no males
being taken at that time.
In adults, as in immature birds, the last trace of moult is in
the small coverts near the carpo-metacarpal joint. It is also evi-
dent that the young moult into the adult plumage, excepting
primaries, at practically the same time (or perhaps a little
later,) that the postnuptial moult takes place in the adults.
The complete renewal of the primaries seems to be somewhat
later, as shown by specimens of nearly adult birds taken on
Duncan Island in December. In other words, birds in the
postjuvenal plumage are practically indistinguishable from
adults in postbreeding plumage. ;
A male, taken by Mr. Beck on Narborough Island on April
18, is evidently a breeding bird, and is in worn plumage
without signs of moult. A female from Jervis Island, De-
cember 21, shows a large patch of pin-feathers on one side
of the abdomen. This renewal was evidently caused by an
accidental loss of feathers.
Birds showing albinistic tendencies were not uncommon,
and were collected on Abingdon, Duncan, Gardner-near-Hood,
and Hood islands. In one of the most extreme cases in the
series, a female (No. 252 C. A. S.), the black of the tertiaries,
See also Bull. B. O. C., v. 10, p. 84.
Vor. II, Pr. I] GIFFORD—BIRDS OF THE GALAPAGOS ISLANDS 11
scapulars, and wing-coverts has been largely replaced by very
light gray, while the brown of those feathers is but very little
lighter in color than normal. The four outermost primaries
of each wing are worn, and are those of the normal immature
plumage; while the remaining primaries are fresh feathers of a
very pale gray color with darker tips. The tail and tail-coverts
are also of an abnormal light gray, and there is a mottled ap-
pearance on the breast, due to the partial exposure of the pale
bases of the feathers. The iridescent patches on the sides of
the neck show feathers subterminally white. The head, how-
ever, is normal. Some albinistic specimens have all of the
primaries pale gray with darker tips; others are variously, but
less conspicuously, marked. The one showing the least
abnormal coloration is a bird with several pure-white downy
feathers in the abdominal region, completely hidden by the
contour feathers. It is perhaps significant that all of the
albinistic birds taken are adult, or are moulting into the adult
plumage, the albinistic feathers being of that plumage. No
albinistic young were found.
The Academy’s series of skins of this species numbers 226,
ninety-three of which are adult males, and eighty-one adult
females. The extreme and average measurements of these in
millimeters are as follows: Males—Wing 118-143 (132);
tail 63-82 (73); culmen 16-19.5 (17.7); tarsus 22-27.3
(24.5) ; middle toe 20-25 (23.2). Females—Wing 114-131
(121); tail 55-73 (64); culmen 14.6-18.2 (16.3); tarsus
19.8-24.7 (22) ; middle toe 18.3-22 (20.5).
Table I, p. 111, shows the measurements of adults by islands.
It will be noted that birds from Wenman and Culpepper
islands are the largest, a fact noticeable in life. The males
from Jervis Island are the longest-billed, and the females from
Jervis are, in this regard, second only to females from Cul-
pepper. The sexes are usually recognizable in life, males be-
ing decidedly the larger.
The four eggs of this dove possessed by the Academy are
pure white in color and elliptical-oval in shape. The egg from
Narborough Island measures in millimeters 26.4% 20.4. The
three from Wenman Island measure respectively 27> 20.2,
2619.7, and 26.319.6, the last two being from the same
nest.
12 CALIFORNIA ACADEMY OF SCIENCES [Proc. 47H SER.
Creciscus spilonotus: GALAPAGOS RAIL
Porzana galapagoensis Sharpe, Cat. Birds Brit. Mus., xxiii, 1894, 113
(Galapagos Archipelago).
Creciscus sharpei Rothschild and Hartert, Nov. Zool., vi, 1899, 185
(Indefatigable Island).
Abingdon, Albemarle, Indefatigable, James, Narborough,
and Seymour islands.
This rail is scarce on Abingdon, Albemarle, and “Seymour
islands; fairly common on James and Narborough, and very
common on Indefatigable. Occurring both at sea level and at
high altitudes, it is found under a variety of conditions, in
the mangroves of the littoral region and in the dense and
luxuriant vegetation of the moist region.
Two were shot by Mr. Beck on March 17, 1902, among
thick ferns near fresh water in the vicinity of Villamil, Albe-
marle Island. One was taken in a mangrove swamp on the
southern end of South Seymour in November, 1905. On
Abingdon Island (altitude 1950 feet), it was found during
September, 1906, just below the fern-belt which caps the
highest portion of the island. In this situation it occurred
among small plants about a foot in height, the spreading tops
of which grew so close together as to obscure the ground. On
Narborough Island, April 4 and 5, 1906, Mr. Beck heard it
several times in the tall grass on the rim of the great crater at
an elevation of between four and five thousand feet.
On Indefatigable Island, in November and January, this
species was taken in the mangroves of the northern coast oppo-
site Daphne, and in the mangroves at Academy Bay. In
both places they were fairly easy to shoot, as the ground was
not much hidden by the roots of the trees. On the south
side of the island, from about 450 to 1100 feet—the highest
altitude reached—they were common, and, because of the
open spaces under the bushes and trees, quite easy to obtain.
Below seven hundred feet they gradually diminished in num-
bers, owing to the increasing sparsity of the vegetation, and to
its transition from humid to arid. In the forests these rails
were far from wild, coming very close and peering with their
little red eyes into the intruder’s face. If a sudden move-
ment or noise was made, they disappeared like a flash. Often
many were heard, but few seen. On the first trip inland from
Academy Bay, in November, 1905, only twelve were seen;
Vor. II, Pr. I] GIFFORD—BIRDS OF THE GALAPAGOS ISLANDS 13
while on a trip in January, 1906, thirty were taken in one
morning. When we traveled through the heavy undergrowth,
their cackling calls were heard on all sides. To obtain speci-
mens, it was usually necessary to stand quietly under a tree
and clap the hands at intervals. The rails would cackle in
response, and, as a rule, the collector would be rewarded by
seeing one, or sometimes three or four, step stealthily into the
open.
On James Island, in December, January, and August, they
were found in the tall grass, which grew abundantly on the
main peak (altitude 2,850 feet). It was a much more diffi-
cult matter to capture them than on Indefatigable Island, a
long hunt often furnishing only one, or none at all. They
traveled through little runways in the grass, and often, when
seen, were too close to shoot. Their call notes were similar to
those of the rails of Indefatigable Island, and they also re-
sponded to the clapping of hands.
The reproductive organs of specimens taken in November,
1905, on Indefatigable Island, and in early January, 1906, on
James Island, were somewhat enlarged. A female taken by Mr.
Hunter on Abingdon Island on September 21, 1906, contained
a well-developed egg, and a male and a female taken by Mr.
Beck had enlarged sexual organs.
There is great variation in the degree of white markings on
the lower parts, and on the wing-coverts, back, rump, and
upper tail-coverts. The three specimens from Abingdon
Island are very sparsely spotted, while the specimen from
South Seymour is pretty heavily marked. Birds from Inde-
fatigable and James islands show about an equal range of
variation—from specimens with practically no spots on the
upper parts, to those that are heavily spotted. Both sexes
vary equally in this regard.
The characters’ given to distinguish Creciscus sharpei from
Creciscus spilonotus break down in the Academy series. These
characters are: a slight difference in the shade of brown of
the back, with difference in size and in amount of white spot-
ting. The James Island rails average slightly larger than those
from Indefatigable Island, as is shown in Table IT, p. 112.
The male from Abingdon Island measured in the flesh 157.8
mm. in length, and 241.3 in extent; while the only male from
INov. Zool., v. 6, p. 185.
14 CALIFORNIA ACADEMY OF SCIENCES [Proc. 4TH SER.
Indefatigable Island so measured proved to be 145 mm. in
length, and 228 in extent. Two males from James Island
were 160 and 156 mm. in length, and 245 and 240 in extent.
A female from Indefatigable Island was 138 in length, and 231
in extent; while a female from James Island was found to be
somewhat larger, being 150 in length, and 240 in extent. No
others were measured in the flesh.
The Academy’s series of skins of this species- numbers
seventy-nine, thirty-nine of which are males, thirty-eight
females, and two unsexed. Extreme and average measure-
ments in millimeters are as follows: Males—Wing 61-72
(68.3) ; tail 20-26 (24.6); culmen 15-17.7 (16.13); tarsus
19.5-23.4 (21.53); middle toe 22-26 (24.2). Females—
Wing 61-72 (66.6); tail 21-27 (23.6); culmen 14.7-16.6
(15.46); tarsus 19.7-22.6 (21.28); middle toe 21.8-25.4
(24).
Measurements in millimeters of a series of nine Black Rails
(Creciscus jamaicensis), consisting of one male and eight
females from about San Francisco Bay, California, are as
follows: Male—Wing 66; tail 29; culmen 15.1; tarsus 19.5;
middle toe 20.8. Females—Wing 65-68 (66.6) ; tail 29-34
(30.9) ; culmen 13-14.8 (14) ; tarsus 18.1-19.8 (19.04) ; mid-
dle toe 19.5-21 (20.46).
Comparing the average measurements of the Galapagos Rail
with those of the Black Rail, it appears that the length of wing
of the two species is practically the same, while in length of
tail the Black Rail exceeds the Galapagos Rail by several milli-
meters, in spite of the fact that it is a smaller bird otherwise;
viz., in length of culmen, length of tarsus, and length of mid-
dle toe. In other words, the bill and feet of the Galapagos
Rail are larger in proportion to the other parts than are the
corresponding members in the Black Rail. In the Black Rail,
the development of wing and tail, as compared with that of the
bill and feet, is much greater than in the Galapagos Rail.
The following remarks on the moults and plumages of the
Galapagos Rail are made after a thorough study of the material
in hand.
One male and two females from Abingdon Island show
some wear, but no sign of moult. These specimens all had
enlarged sexual organs, and were taken in September, which
Vor. II, Pr. 1] GIFFORD—BIRDS OF THE GALAPAGOS ISLANDS 15
is apparently the beginning of the breeding-season of this
species there.
A male taken qn Seymour Island, on November 22, shows
wear, but the feathers of the breast seem to be fresh, and
among them are a few just bursting from the sheath. A few
pin-feathers are to be found among the scapulars.
All of the December and January specimens from James
Island show a mixture of fresh and somewhat worn feathers
in the body-plumage. In some specimens a few new brown
feathers are just appearing from their sheaths in the anterior
part of the brown mantle, and other new feathers are appear-
ing in the sides of the breast. There is perhaps a prenuptial
renewal of feathers in certain tracts, as apparently indicated
by the above facts, for the specimens were obviously taken
before the breeding-season; or else they indicate a somewhat
belated postnuptial moult. Age may also be a factor. Three
August specimens are very much worn.
The results of an examination of sixty-three specimens from
Indefatigable Island, taken in November, 1905, and in Janu-
ary and July, 1906, may be summarized as follows:
November specimens, as a rule, show a mixture of fresh
and somewhat worn feathers. Pin-feathers are appearing in
the anterior part of the brown mantle in a few specimens.
Some also show new feathers in the breast as well as in the
back. An occasional specimen, such as No. 271, seems to be
in entirely fresh plumage, including wing-coverts, which in
practically all other specimens seem to show wear. Whether
the new feathers, which are appearing in some, are the last
of a postnuptial moult or the first of a prenuptial moult, is
difficult to say. Again I am unable to tell what part age plays
in the scheme of moults.
With one exception, twenty-seven specimens from Inde-
fatigable Island, taken in January, exhibit no signs of moult;
but all show wear in varying degree. These specimens are
evidently in about the same category as the three specimens
from Abingdon Island above mentioned. The one exception
has pin-feathers in the back and in the sides of the breast.
Specimens from Indefatigable Island, taken in July, are as-
suming fresh plumage, and in most cases pin-feathers are still
in evidence in the back and in the breast. In the majority of
cases the new dress has been quite completely donned.
16 CALIFORNIA ACADEMY OF SCIENCES [Proc. 47H Ser.
The examination of specimens for signs of moult brought
to light five cases of feathers lacking pigment. In each bird
so affected there was but one white feather; in four of the
cases the feather was in some part of the neck, and in the
fifth in the breast. Four of the specimens are from Indefat-
igable Island and one from James. The bird from James was
taken in December, and the birds from Indefatigable, in No-
vember, January, and July.
Gallinula galeata: FLorIDA GALLINULE
Albemarle and Chatham islands.
Florida Gallinules proved to be tolerably common in the
large salt-water lagoons fringed with mangroves, in the vicinity
of Villamil, Albemarle Island, in November and August.
They were wary and secretive. Usually they kept out of gun-
shot, and not more than two or three were seen at a time. An
apparently immature male was shot by Mr. Hunter on a fresh-
water pond at about one thousand feet elevation near Progreso,
Chatham Island, on October 17.
In a high-plumaged male taken on southern Albemarle on
March 6, the amount of white on the edge of the wing is ex-
tensive, but it is equaled in a specimen from Merced County,
California. The tarsi of the Galapagos bird, however, have
dried of a variegated orange-and-red color, while those of the
California examples have dried chiefly of a dark olive-green.
The measurements in millimeters of the adult male from the
Galapagos Islands are as follows: Wing 183; tail 73; culmen
and frontal shield 47; greatest width of frontal shield 15.3;
tarsus 53; middle toe 64.
The extreme and average measurements in millimeters of a
series of seven adult males from Merced County, California,
are as follows: Wing 175-190 (182); tail 70-74 (72) ; cul-
men and frontal shield 40-44.9 (42.4); greatest width of
frontal shield 10.2-15 (13.1) ; tarsus 48-57 (53.1) ; middle toe
63-70.7 (65.8).
Spheniscus mendiculus: GALAPAGOS PENGUIN
Plate I, Fig. 1
Albemarle, Brattle, Charles, Duncan, James, Jervis, Nar-
borough, Onslow, and Seymour islands.
Vor. II, Pr. I] GIFFORD—BIRDS OF THE GALAPAGOS ISLANDS 17
The chief rendezvous of this penguin was Iguana Cove,
Albemarle Island, where it was not unusual to see thirty or
forty at a time. Several were seen at each of the following
places, viz.: Cormorant Bay, Post Office Bay, and Black Beach
Roads, Charles Island; northeastern Duncan; the west side
of South Seymour; the east, north, and west sides of James
Island; the east and north sides of Narborough; and at Banks
Bay and Tagus Cove, Albemarle Island. One was seen on
the northeastern side of Jervis, and another on Onslow. None
were seen at Seymour in November, 1905, when the surf along
the rocks was quite heavy; but in July, 1906, when the bay was
tranquil, a few were noted. Careful search will probably
show that this species occurs north of the equator, as it is not
rare a few miles to the southward.
At Iguana Cove it was common to see eight or ten together
on one rock, at other places never more than two or three. As
a rule they could be approached closely. One was caught at
Cormorant Bay on a flat rock several feet from the water.
When seized, it turned on its captor with a snarl, and tried to
bite. At Banks Bay a picture of three on a rock was taken at
a distance of about ten feet. They evinced considerable curi-
osity, one swimming off a short distance and then returning
to have another look.
In getting over the rough rocks the Galapagos Penguin
uses both flippers and feet. The bird which was caught at
Cormorant Bay and kept alive several days, sat upright most
of the time. When moving about on deck, it progressed by
small jumps, with its head and neck bent forward and down-
ward, giving it a stooping appearance. In climbing a beam
six inches high, it used its flippers as arms, placing them on
top of the beam, and raising itself with the additional aid of
its feet.
Small fish, up to four inches in length, constituted the food
of this species so far as discovered. Often, when fishing,
penguins would be followed closely by a small flock of Noddies,
which would hover over them excitedly when a catch was
made.
Nothing definite is known of the nidification of this species.
A nest of sticks laid loosely together on the floor of a cave
at Iguana Cove, was attributed to it. As additional evidence
might be mentioned the fact that three birds were seen to enter
August 8, 1913
18 CALIFORNIA ACADEMY OF SCIENCES [Proc, 4TH SER.
a small inaccessible cave, which had its opening at the water’s
edge. Two females taken at Iguana Cove on March 21, 1906,
contained well-developed eggs.
Nearly all of the specimens taken were very fat, and occa-
sionally a bird was taken in which the webs of the feet were
slit. In an immature specimen (No. 342 C. A. S.) the
anterior edge of each flipper shows a healed injury, which in
the right flipper is a deep indentation. Each of these injuries
appears to have been caused by a severe bite when the bird
was small.
The description of the immature plumage by Messrs.
Rothschild and Hartert’ fits four of the Academy’s specimens
exactly. The measurements of the Academy’s series of thir-
teen adults, however, do not confirm their statement that “The
female differs from the male at a glance in being much smaller.”
A large male might be distinguished from a small female, but
a medium-sized or small male could not be distinguished from
a large or medium-sized female.
Every specimen in the Academy’s series of seventeen exhibits
anywhere from two to about thirty-three dusky feathers
among the pure-white ones of the breast and abdomen. An
apparently similar condition, attributed to melanism, is stated
by Sir Walter Buller’ to exist in certain specimens of the Yel-
low-crowned Penguin (Megadyptes antipodum).
None of the specimens in the Academy’s series show moult
in progress. When in worn feather, the dusky portions of the
plumage assume a brownish cast, while in fresh plumage they
are grayish. Table III, p. 112, gives the general condition
of the plumage of each specimen, as well as the measurements
of the specimen in millimeters.
In the flesh, No. 343 measured 480 mm. in length, and 375
in extent; while No. 354 measured 490 in length, and 394 in
extent.
The extreme and average measurements in millimeters of
the adult males and females follow: Males—Flipper 149-166
(156) ; tail 23-39 (27) ; culmen 57.4-61.1 (60.2) ; tarsus 26-
31.6 (29) ; middle toe and claw 56.8-62.5 (60.2). Females—
Flipper 140-155 (149); tail 19-30 (26); culmen 56-57.4
1Nov. Zool; v: 16, ip: 199.
?Supplement Birds N. Z., v. 1, p. 94.
Vot. II, Pr. I] GIFFORD—BIRDS OF THE GALAPAGOS ISLANDS 19
(56.7) ; tarsus 25.7—29 (27.2) ; middle toe and claw 56.3-60.7
(GRAM
The colors of the naked parts of the adults in life were as
follows: Upper mandible mostly black ; lower mandible black-
ish, becoming fleshy pink at base; iris claret-brown; feet black,
usually mottled with grayish white.
Sterna fuliginosa: Sooty TERN
Crossman, Culpepper, and Wenman islands.
Although confined almost exclusively to Culpepper and
Wenman islands and their vicinity, this tern was observed
near the Crossman Islands on August 19, 1906. None were
seen at Wenman on September 24, 1906, although they have
been reported from that locality. Several, however, were
heard during the night between that island and Culpepper.
On the north side of Culpepper on the following day, the air
swarmed with these birds, most of them flying very high, and,
judging by the incessant twittering sound which reached our
ears, apparently all calling. This species nests on the top
of Culpepper Island, which is inaccessible on account of the
high cliffs on all sides.
During September, 1905, from latitude 3° 6’ North, longi-
tude 84° 9’ West, southeast to Manta, Ecuador, and from
there west to the Galapagos Islands, no Sooty Terns were
seen. South of the Galapagos Islands during the months of
May and June, 1906, they were met with three times:
May 8, latitude 2° 29’ South, longitude 90° 4’ West—one.
June 9, latitude 3° 39° South, longitude 93° 1’ West—two.
June 13, latitude 3° 6’ South, longitude 91° 26’ West—one.
Inasmuch as we were cruising off and on south of the archi-
pelago, for two months, we had ample opportunity for obser-
vation. The almost total absence of this species in this region
and off the coast of Colombia and Ecuador as far south as
Manta bears out Mr. Saunders’ statement that it is “Almost
unknown on the South American side of the Pacific.’””
On the voyage from San Francisco to the Revilla Gigedo
Islands, the Sooty Tern was met with on two occasions. On
Nov. Zool., v. 6, p. 191.
Cat. Birds Brit. Mus., v. 25, p. 110.
20 CALIFORNIA ACADEMY OF SCIENCES [Proc. 47H Ser.
July 20, 1905, the first one was seen about noon, when in
latitude 25° 56’ North, longitude 114° 11’ West. A young
one was seen five days later, the schooner’s position then being
latitude 19° 37’ North, longitude 111° 11’ West.
The first breeding-place of this species visited was Oneal
Rock, near Socorro, Revilla Gigedo Islands. There, on July
27, 1905, they and the Noddies were about equally abundant,
thousands flying overhead as Mr. Beck and I landed on the
rock. Whenever a shot was fired they arose in a cloud, and
the calling was incessant. No fresh eggs of the Sooty Tern
were discovered, but a number of well-feathered young were
taken.
After leaving the Revilla Gigedo Islands, the species was
not again encountered until in latitude 10° 43’ North, longi-
tude 109° 10’ West, on August 3, 1905, when about a dozen
were seen. This was in the vicinity of Clipperton Island,
Mexico, where this tern breeds abundantly. They were seen
quite commonly every day after that, while we were beating
back and forth against contrary winds and currents in an at-
tempt to reach the island, which we finally succeeded in doing
on August 10. Very frequently the Sooty Terns were fishing
in company with other birds such as Brewster’s Boobies, Nod-
dies, Clipperton Noddies, and Blue-faced Boobies, and often
all were mixed indiscriminately in one large flock.
Messrs. Beck and Hunter reported Sooty Terns nesting by
thousands on several low, flat islets in the brackish lagoon at
Clipperton Island. On one islet, about eight hundred
square feet in area and ten inches in elevation above the
water of the lagoon, there were over a thousand eggs. They
were laid on the bare coral with no semblance of a nest, and
were so closely placed that it was necessary to step with ex-
treme care to avoid crushing them. The owners were very
fearless, and allowed themselves to be handled freely. They
were also very noisy, and kept up a great din. On the 9th
four hundred eggs were collected by the two residents of the
island from a space twenty by twenty feet, and by 11 A. M.
on the 10th over one hundred fresh ones had been laid in the
same area... The week before we arrived, a rise in the water
of the lagoon had submerged some of the lower islets, ruining
pee Hull, Birds of Lord Howe and Norfolk Islands, P. L. S. N. S. W., v. 34,
p. :
Vor. II, Pr. I] GIFFORD—BIRDS OF THE GALAPAGOS ISLANDS 21
hundreds of eggs. In addition to a large number used for
food, we preserved 379, representing as many sets. A num-
ber of downy young of various ages were also taken.
After leaving Clipperton, Sooty Terns were not often ob-
served, only six being seen on the voyage to the Galapagos
Islands:
August 16, latitude 8° 1’ North, longitude 105° 22’ West—
one.
August 19, latitude 7° 21’ North, longitude 103° 40’ West—
one.
August 26, latitude 3° 41’ North, longitude 94° 16’ West—
two.
September 2, forty miles south of Cocos Island, Costa Rica
—an immature male taken.
September 16, latitude 3° 6’ North, longitude 84° 9’ West—
an immature one.
On the homeward voyage Sooty Terns were observed twice.
The first instance occurred on September 27, 1906, two days
after leaving Culpepper, our position being latitude 5° 34’
North, longitude 95° 27’ West. About noon a flock of thirty
or forty, with three or four Man-o’-war Birds following them,
were seen working in a southeasterly direction. The second
instance occurred on October 18, in latitude 16° 55’ North,
longitude 112° 55’ West, when a single individual flew by the
vessel.
Fifty-two skins of this species were brought back, twenty-
seven of which are adult. . Fourteen are downy young of vari-
ous ages from Clipperton Island. The remaining eleven are
immature birds. Of these, seven are in the dusky juvenal
dress; with buff tips to the dorsal feathers posterior to the
hind neck, and vinaceous-cinnamon tips to the under tail-
coverts. They were taken from nests on Oneal Rock, and,
although their wings were not full grown, they were probably
able to fly. An immature male (No. 1351 C. A. S.) taken in
latitude 19° 40’ North, longitude 112° West, on July 25, 1905,
shows considerable dark coloration below and on the sides of
the head, and is evidently going through the first prenuptial
moult. The old dorsal feathers are so worn that it is impos-
sible to distinguish any pale tips. At any rate the new scapu-
22 CALIFORNIA ACADEMY OF SCIENCES [Proc. 4TH Ser.
lars and interscapulars are dark gray with conspicuous white
tips. New inner primaries, new upper wing-coverts, new tail-
coverts, and new feathers on the under parts and about the
head are also appearing. Some alternation is manifested in the
replacement of the upper wing-coverts. An examination of
the tail shows the two inner and the two outer rectrices to be
new. The outer ones are not those of the full adult, but are
dusky save for a terminal whitish spot on the outer web.
No. 1350 C. A. S., male, from forty miles south of Cocos
Island, September 2, 1905, is very much like the bird just
described, and has in addition some whitish streaking on the
fore part of the crown. This specimen seems to exemplify
more fully the plumage developed during the first prenuptial
moult. The three outer primaries of one wing and the two
outer of the other have not been replaced, nor have the two
rectrices nearest to each of the outermost rectrices. Nos. 1348
and 1349, taken near Clipperton Island on August 5 and 8
respectively, are adult in every particular, save for a few dark
feathers in the lower parts.
The fourteen downy nestlings collected on Clipperton Island
on August 10, show some variation in age and size, which can
perhaps be best indicated by the measurements of the culmen
and tarsus of the largest and the smallest. Largest: Culmen
15.6 mm.; tarsus 17.1 mm. Smallest: Culmen 11.8 mm.;
tarsus 13.9 mm. All exhibit the egg-tooth. Mr. Saunders’
description of a chick’ about three days old does not quite
describe the conditions which exist in the Academy’s series of
chicks. The specimens are “streaked with grayish brown and
dull white on the upper surface,” but the white down is tipped
with rufous. All the down of the upper surface appears as
though the ends of the filaments of each tuft were twisted
together, giving the surface a bristled appearance. There is
more or less variation in the relative amounts of dark and light
coloring, producing accordingly either a darker or a lighter
dorsal aspect.
Two adults from the Revilla Gigedo Islands are in plumage
quite worn, and show new feathers appearing in the back,
among the upper wing-coverts, and in the breast. In one
specimen the moult of the body-plumage is more advanced
1Cat. Birds Brit. Mus., v. 25, p. 109.
Vor. II, Pr. I] GIFFORD—BIRDS OF THE GALAPAGOS ISLANDS 23
than in the other, although both were taken on July 27, 1905.
New proximal primaries are appearing in both, and in one,
new middle rectrices. In the other, the outer rectrices are ap-
pearing first. Undoubtedly this is the postnuptial moult, as
proved by the presence of a few large-sized young on the
nesting-site.
The Clipperton Island adults, taken during the first half of
August, 1905, are all in somewhat fresher plumage; for the
breeding-season was not over, as it was at Oneal Rock. With
one exception, none show signs of feather-growth. In No.
1330 C. A. S., a few new interscapulars are appearing, their
bases being still enveloped in the sheath.
Extreme and average measurements in millimeters are as
follows: Fifteen adult males—Wing 275-295 (285); tail
142-194 (168); culmen 40-44.5 (42.4); tarsus 20.6-22.9
(21.9) ; middle toe 17.5-21.5 (20). Twelve adult females—
Wing 278-300 (288); tail 170-216 (189); culmen 40-43
(41.2); tarsus 20.7-23 (21.6); middle toe 18.4-20.9 (19.6).
The following lengths and extents in millimeters were
taken by Mr. Beck from birds in the flesh. The lengths of
four males were 390, 450, 455, and 465; the extents were 838,
880, 882, and 899. A female measured 460 in length, and 870
in extent.
The following remarks are based entirely upon the series
of fresh eggs collected on Clipperton Island, August 10, 1905.
They vary a great deal in shape, the majority being ovate,
elliptical-ovate, and elongate-ovate. The rarer shapes are
short-oyate, cylindrical-ovate, oval, elliptical-oval, and nearly
ovate pyriform.
The ground color is likewise subject to great variation.
The majority of the eggs vary in this regard from white to
cream-color, cream-buff, and pinkish buff. In a number of
cases the white ground color has a slight bluish cast. One
abnormally-colored egg has a vinaceous-cinnamon ground with
cinnamon-rufous spots and blotches, and suffused dull purplish
blotches which appear to be beneath the surface. Another is
vinaceous-buff, with bay spots of varying size and the usual
faint suffused blotches. Still another is pale vinaceous-buff,
almost immaculate save for several dark brown spots at the
larger end, and a few pale suffusions. All of the eggs of the
24 CALIFORNIA ACADEMY OF SCIENCES [Proc. 47H Ser.
series have these faint spots and blotches of dull purplish or
brownish, which appear to be below the surface, just as
though a coat of the ground color had been put over them.
The external spots and blotches vary greatly in size, number,
and color. In size they range from minute dots to blotches
the area of a dime. In number they vary greatly—some eggs
being dotted over the entire surface, others being marked with
both large and small spots, others with a few large
spots and blotches, and in addition to these styles
there is every conceivable sort of intermediate. How-
ever, no absolutely immaculate eggs occur in the series.
As a rule, the markings are heaviest at the larger end of the
egg, and very often the majority of the spots are at that end.
In some specimens they are most numerous just below the
larger end, forming sort of a wreath or zone.
The markings of a single egg may vary much or little in
color. Usually there are several different shades of brown
and reddish brown on a single specimen. In one case the
markings range from cinnamon to seal-brown. In specimens
with a white ground they partake more of brown than of red,
while in specimens with a cream ground the reverse is true.
On three or four specimens the reddish brown markings have
a blurred aspect. Mr. A. F. Basset Hull, in his paper on
The Birds of Lord Howe and Norfolk Islands, describes and
figures similar variations.*
Three hundred and seventy-six eggs in the Academy’s series
yield the following extreme and average measurements:
Length 44-59.2 mm. (50.6 mm.); breadth 33.2-38.5 mm.
(35.9 mm.).
Anous stolidus: Noppy
Abingdon, Albemarle, Barrington, Bindloe, Brattle, Cham-
pion, Charles, Chatham, Culpepper, Dalrymple, Daphne, Dun-
can, Gardner-near-Charles, Gardner-near-Hood, Hood, Inde-
fatigable, islet off northeast James, James, Jervis, Nameless,
Narborough, Onslow, Seymour, Tower, and Wenman islands.
Noddies of the indigenous dusky variety were quite com-
mon throughout the archipelago, and were seen on the sur-
rounding sea to a distance of about sixty-five miles.
IP LAROsNG SaehVias a ota Dan OOO DI) O08
Vor. II, Pr. I] GIFFORD—BIRDS OF THE GALAPAGOS ISLANDS 25
They nested in crevices and holes, and on ledges of cliffs
and caves, not more than thirty feet above the water. The
single egg was usually placed in a slight depression, and sur-
rounded by a few bones, seaweed, sticks, remains of crabs, and
feathers, which composed the nest.
This species has been found breeding on Albemarle Island
in February, March, and April; on Culpepper in July and Sep-
tember; on Hood in February; on Indefatigable in January;
and on James in April—in all, during six months of the year.
Eggs about to be laid were taken from birds captured at
Academy Bay, Indefatigable Island, on January 22, and at
Tagus Cove, Albemarle Island, on April 6 and 9.
Of four nests examined at Tagus Cove on March 24, one
contained an egg in an advanced stage of incubation, another
contained a lively chick two or three days from the shell, and
the remaining two contained pretty well-developed young. The
same day two young birds just able to fly were shot. A young
one was taken from a nest on Culpepper Island on September
25, 1906.
It was not uncommon to see a Noddy sitting on the head of
a Brown Pelican, while the latter was resting on the water
swallowing fish. Once I saw two on a pelican’s head at one
time. Several often accompanied the young pelicans in their
excursions along the coasts.
On the outward voyage from San Francisco in 1905, the
first Noddies were met with on July 24 in latitude 19° 40’
North, longitude 112° West, several passing us that evening.
A few were next seen along the coast of Socorro, Revilla
Gigedo Islands, on July 27. That same day we visited Oneal
Rock, which lies about a mile from Cape Henslow, Socorro.
There Noddies and Sooty Terns were assembled in thousands.
Only Noddies seemed to be nesting, and they were found all
over the rock, each egg being deposited in a little depression.
We caught many adults with our hands, while they were sit-
ting on their nests, in addition to two well-feathered young.
After leaving the Revilla Gigedo Islands, Noddies were
again seen on July 31 in latitude 13° 47’ North, longitude 109°
15’ West. In latitude 10° 43’ North, longitude 109° 10’ West,
on August 3, one came aboard the vessel in the evening.
26 CALIFORNIA ACADEMY OF SCIENCES [Proc. 47H Ser.
We landed on Clipperton Island, Mexico, on August 10. I
worked about Clipperton Rock, where Noddies were nesting
commonly, and were as unafraid as on Oneal Rock. Messrs.
Beck and Hunter, who landed on some of the islets in the
lagoon, stated that both this species and the Sooty Tern were
nesting abundantly, and they obtained eggs and young of both.
Between Clipperton Island and Cocos Island, Costa Rica,
the first certainly identified Noddies were seen on September
1, about thirty miles south of Cocos. An immature one was
taken on the following day.
During our thirteen-day stay at Cocos Island, the Noddy
was common along our route of travel by water between Chat-
ham Bay and Wafer Bay. There was usually a good-sized
flock on the point opposite Nuez Island, and also a colony on
the small island between Nuez and Cascara islands. A small
nesting colony was located on a rock near Conic Island. Their
nests consisted of a few twigs, and were occupied by young
birds which, with one exception, were nearly able to fly.
The Academy’s series of skins of this species numbers 132.
A downy young one from Clipperton Island is entirely white,
save for a few black contour feathers appearing on the back,
crown, and sides of the breast. The black feathers are tipped
with white down. The only specimen in the down from the
Galapagos Islands is of a brownish-gray color all over, shad-
ing into a paler gray on the abdomen, in contradistinction to
the downy young one from Clipperton Island. This fact
probably has no geographic significance, for young in both
white and black natal down are found in the same colony.*
Two young from Oneal Rock are fairly well feathered ex-
cept for the throats, which are covered with white downy
teleoptiles. In one specimen the contour feathers appearing
in the throat are tipped with grayish downy neossoptiles, and
in the other with white. All of the young from Cocos Island
are pretty well feathered, but show both white and gray down
at the tips of the feathers, while the downy teleoptiles are pale
gray.in most cases.
Four specimens, Nos. 1439, 1473, 1475, and 1501, taken at
Tagus Cove on April 5 and 7, were at that time going through
1Watson, Papers Tortugas Lab. Carnegie Inst. Wash.. v. 2. p. 237. footnote, plate
4 (Watson).
Vor. II, Pr. I] GIFFORD—BIRDS OF THE GALAPAGOS ISLANDS 27
what is probably the first prenuptial moult, involving the wings
as well as the body. The newly-acquired feathers of the top
of the head are darker than those of adults taken at the same
time, and the ventral aspect of the body-plumage is browner.
Five adults from Oneal Rock, taken July 27, 1905, are in
nuptial plumage somewhat abraded, and showing no indica-
tions of recent feather-growth, except in one case, where a pin-
feather was found in the side of the neck.
Nine adults from Clipperton Island were taken on the
breeding-ground, August 10, 1905. In No. 1416, male, the
moult is in full progress. New primaries have replaced all
but one of the old; new tail-feathers and new body-feathers
are appearing. The white downy teleoptiles beneath the
contour feathers are also being shed. Six other specimens
show the moult under way; in the most it is just started, two
or three pin-feathers usually appearing at the base of the hind
neck. Two remaining specimens show no moult and are
comparable to the specimens from Oneal Rock. Without a
doubt, the moult which is beginning is the postnuptial. Two
individuals taken at sea near Clipperton Island on August 8,
are in the same stage as those from the island; one shows con-
siderable new feather-growth, while the other exhibits but one
pin-feather.
No. 1412, captured on August 3, ten miles north of Clipper-
ton Island, has a great many remarkably abraded and faded
feathers in the back, wings, and under parts. The new
plumage is that of the adult, as shown by the feathers of the
top of the head. The question is whether the worn feathers
are of an immature or of an adult plumage, also whether the
bird has not skipped a moult, or at most undergone only a
partial moult. The extremely dilapidated condition of the
old feathers would seem to indicate something of the sort.
Furthermore I can find no feathers that may be attributed to
a plumage appearing between the much worn one and the pres-
erit new one.
In adults from Cocos Island taken during the first half of
September, 1905, the postnuptial moult is in progress; pri-
maries and rectrices are being renewed in some instances, as
well as the body-plumage. In certain cases the moult is just
starting.
28 CALIFORNIA ACADEMY OF SCIENCES [Proc. 4TH SER.
The results of an examination of a series of adults from
the Galapagos Islands may be summarized as follows:
A pair taken on Hood Island in latter September, 1905, seem
to be just completing a moult which has involved the entire
plumage. I cannot say whether it is prenuptial or postnuptial.
Eight specimens taken at Brattle Island on October 30,
show, in the majority of cases, some feather-renewal about the
head, back, and breast. The primaries and rectricés in all
show varying degrees of wear. Apparently a moult is begin-
ning, and it is likely that it is prenuptial, since the species has
been found breeding on other southern and central islands in
January and February. ‘To six November specimens taken at
Indefatigable and Daphne islands the same remarks are ap-
plicable. In one a new lateral rectrix is appearing.
A male from Duncan Island, December 6, shows no feather-
growth and very little abrasion.
Fourteen January specimens, one from James Island and
thirteen from Indefatigable, are evidently in nuptial plumage,
and show no signs of feather-growth except in three specimens
from Indefatigable. One is evidently a brooding male, and
shows two new feathers appearing in the anterior part of the
abdominal region; a second shows a new tail-feather and one
or two new interscapulars; while in the third specimen the
moult has gained considerable headway in the ventral tract.
A male from Hood Island, February 1, is evidently in
nuptial dress.
On March 20 eleven adults were taken at Iguana Cove,
Albemarle Island. All are in fairly fresh plumage, about
half of them showing no pin-feathers. Of those with pin-
feathers, two or three are getting new inner primaries.
A male from Tagus Cove, captured March 24, shows re-
newal of the primaries, rectrices, lesser wing-coverts, and body-
plumage.
Nineteen examples from Tagus Cove, shot during the first
half of April, show the postnuptial moult under way, and in-
volving in most instances the wings as well as the body-
plumage.
A female from south Albemarle, April 28, is undergoing a
moult of the body-plumage, probably postnuptial. All but the
two outer primaries of each wing have been renewed. A fe-
Vot. II, Pr. I] GIFFORD—BIRDS OF THE GALAPAGOS ISLANDS 29
male, taken May 9 in latitude 2° 20’ South, longitude 90° West,
is in a somewhat similar condition.
A male, captured on May 21 at sea south of Duncan Island,
is in worn plumage, but with renewals taking place both in
the body-plumage and in the flight-feathers. Two males from
Indefatigable Island captured in July, are in a like state; but
the replacement has progressed farther.
In all cases the pin-feathers appear black in contrast to the
feathers of the disappearing plumage.
The Academy’s series of adults, forty-six males and fifty-
three females, gives the dimensions in millimeters of the
species as follows: Males—Wing 250-291 (279); tail 136-
173. (161); culmen 37.5-43.6 (40.8); tarsus 21.6-25.5
(24.2) ; middle toe 27.6-33 (31). Females—Wing 249-280
(272) ; tail 131-167 (155); culmen 35.5-42.8 (39.3) ; tarsus
21-25 (23.4); middle toe 27.3-31.7 (29.8).
Table IV, p. 113, shows the measurements of adults from
the four localities visited. The Galapagos specimens average
somewhat smaller in certain respects than their northern
relatives.
Four males from the Galapagos Islands measured in milli-
meters in the flesh as follows: Lengths 396, 400, 401, 440;
extents 824, 839, 845, 855. Six females from the same lo-
cality measured: Lengths 380, 380, 392, 396, 400, 400;
extents of five 784, 809, 813, 813, 821.
The Academy’s series of seventy-eight eggs exhibits no
noteworthy variation in either coloration or form. It shows
the variation in size to be: Length 47.4-56 mm. (51.1 mm.) ;
breadth 32.2-38.5 mm. (35.5 mm.).
Micranous diamesus: CLIPPERTON NODDY
This species was often seen in company with the Noddy,
and in many cases, when the birds were seen at sea, it was
impossible to distinguish the species with certainty.
On August 7, 1905, off Clipperton Island, Mexico, the first
Clipperton Noddy was observed, and on the 9th the species
was again certainly identified.
On August 10, Clipperton Island was visited, and this
species was found nesting very commonly on Clipperton Rock.
The nests, built of algae from the lagoon, were placed on little
30 CALIFORNIA ACADEMY OF SCIENCES [Proc. 47TH Ser.
juttings of rock on the walls of the cliffs and of caves, and
sometimes they were built on top of old nests. They were
all damp, and about two-thirds of them contained eggs, some
of which were incubated. Of eight eggs collected, two were
fresh, while in the remaining six incubation had begun. With
this species one egg constitutes a clutch. The owners were
all lacking in timidity and several were caught by hand.
On September 1, 1905, the Clipperton Noddy was met with
about thirty miles south of Cocos Island, Costa Rica, and the
following day one was captured.
During our stay at Cocos Island in the first half of Sep-
tember, this species was found commonly along the shore
line between Chatham and Wafer Bays. Three were seen fly-
ing up the fresh-water creek at Wafer Bay. They roosted
in the trees as well as on the rocks along the shores. Indi-
viduals often circled about the small boat four or five times,
keeping too close for shooting. Like the Noddy this species
is quite readily decoyed to wounded birds. So far as noted
neither species dives for its food. In two instances Man-o’-
war Birds were seen in pursuit of Clipperton Noddies.
Messrs. Snodgrass and Heller’ report this species as nesting
in the tall trees near Chatham Bay in July. During our stay
in September, young, a-wing, appeared to be more numerous
than adults, evidencing that the breeding-season had passed.
The two ornithologists referred to above report only imma-
ture birds at Clipperton in November.
The specimens in the Academy’s series agree very well with
the descriptions* of the adult and immature males given by
Messrs. Snodgrass and Heller. There seem to be no charac-
ters, aside from length of culmen, which differentiate the males
and females, either adult or immature. All of the young birds
taken were able to fly, and all were captured at Cocos Island,
with the exception of one secured on Clipperton, August 10.
Of a series of thirty specimens taken on Clipperton on
August 10, one (No. 1593 C. A. S.) is completing the juvenal
plumage, for the primaries and rectrices are yet in an imma-
ture state. Growing feathers are also to be seen in both the
dorsal and ventral tracts. Two specimens, Nos. 1525 and
1548, are immature, and are going through a belated first
1Proc. Wash. Acad. Sci., v. 4, p. 510.
Ibid, p. 509.
4
Vor. II, Pr. I] GIFFORD—BIRDS OF THE GALAPAGOS ISLANDS 31
prenuptial moult, or else through the first postnuptial moult.
The moult involves the entire plumage in both cases. It is to
be noted that, in No. 1525, the two lateral and several of the
median rectrices have been renewed, while in No. 1548, the
renewal seems to be starting with the median rectrices. The
remaining twenty-seven specimens are to all appearances
adults in worn nuptial plumage. Nearly all are entering upon
the postnuptial moult, as attested by pin-feathers in the back
and breast and, in a few cases, by new inner primaries and
new rectrices. No. 1523 exhibits a pure white feather at the
base of the hind neck; aside from this, no trace of albinism was
noted in the species.
Twenty-three Cocos Island adults are in a state somewhat
similar to that of the Clipperton Island specimens, the breed-
ing-season on the latter island evidently being later. In some
cases the moult of the body-plumage, particularly anteriorly,
seems to be farther advanced. Four immature specimens
from Cocos Island, Nos. 1528, 1573, 1591, and 1592, seem to
be comparable to Nos. 1525 and 1548 from Clipperton. It is
presumed that the moult in this case is the first postnuptial.
One specimen, No. 1528, seems to have recently acquired new
primaries; in fact, the distal primary in each wing is just ap-
pearing from its sheath. Thirty-four Cocos specimens are in
the juvenal plumage, and give no evidence of postjuvenal
moult except an occasional pin-feather in the crown and back
of several. September 13 is the latest date on which specimens
were taken.
Certain adults show to some extent the character ascribed
by Messrs. Snodgrass and Heller to Micranous hawaiiensis in
the following sentence: “In M. hawaiiensis the pale slaty
plumbeouS color of the back of the head and neck reaches so
far ventrally on the sides of the head and neck, and even on
the upper part of the breast, that there is distinctly marked off
on the chin and throat a median longitudinal area of dark
plumbeous-brown well defined on each side against the paler
lateral parts.”*
The Academy’s series of the Clipperton Noddy numbers
ninety-three specimens, twenty-six of which are adult males,
and thirty adult females. The adult males average in milli-
1Proc. Wash. Acad. Sci., v. 4, p. 510.
32 CALIFORNIA ACADEMY OF SCIENCES [Proc. 47H SER.
meters as follows: Wing 232; tail 124; culmen 44.7; depth
of bill at base 9; tarsus 20.2; middle toe 27.8. The adult
females average as follows: Wing 229; tail 121; culmen
42.2; depth of bill at base 8.4; tarsus 19.7; middle toe 27.5.
Four adult males and two adult females from Clipperton
measured in millimeters in the flesh as follows: Males—
Lengths 345, 355, 357, 370; extents 675, 677, 685, 700. Fe-
rales Weneths 353, 358; extents 672, 680.
Table V., p. 113, gives separately measurements of birds of
both sexes from Cocos and Clipperton islands.
Seven eggs collected on Clipperton Island are elliptical-ovate
and elongate-ovate in shape, and in color and style of mark-
ings resemble the eggs of the common Noddy. They measure
in millimeters as follows: 44.8%31.5, 47.332.7, 43.732,
44.6X31.5, 4630.8, 45.2X32.5, 45.6X30.8.
Gygis alba: \WHITE TERN
Tower Island.
A White Tern passed close to the vessel on September 14,
1906, when off Tower Island. Another was captured by Mr.
Beck on Oneal Rock, near Socorro, Revilla Gigedo Islands, on
July 27, 1905. It was the only one observed among
thousands of Sooty Terns and Noddies.
On August 9, 1905, the second specimen for the expedition
was seen near Clipperton Island, Mexico. The following day,
on that island, a dozen were found, in company with Brew-
ster’s Boobies, roosting on the crossbeams of a shed, one end of
which had an opening, giving the birds access.
During the voyage from Ciosenon Island to Cocos Island,
Costa Rica, White oTieens were noted as follows:
August 29, 1905, latitude 5° 22’ North, longitude 87° 5’
West—two.
August 31, 1905, latitude 4° 5’ North, longitude 88° 3’
West—a few.
September 2, 1905; forty miles south of Cocos Island—
two or three.
At Cocos Island they were commonest in the forests, roost-
ing in the trees both inland and along the coast. They were
seen also among the trees on the small outlying Nuez Island.
Vou. I, Pt.I] GIFFORD—BIRDS OF THE GALAPAGOS ISLANDS 33
The forests on Cocos Island are very luxuriant, and the island
is well watered, streams flowing down on all sides. It is in this
setting that the terns appear to greatest advantage. Asa rule,
the first intimation a person gets of their presence is a startling
clucking over his head. Upon looking up he will find two or
three of these beautiful inhabitants of the forest hovering
within a yard of his head. After flying about him four or
five times, they will dart away among the trees with a flight
as sure as that of any woodland bird.
Over the water their flight was very swift and erratic, and
usually at a considerable elevation. None were seen on the
water. They paid but little attention to a boat, seldom ap-
proaching to examine it. At times they were seen in pursuit
of each other, and then their evolutions were the swiftest.
One day eight or ten were seen pursuing an Osprey.
Mr. A. F. Basset Hull, in The Proceedings of the Linnean
Society of New South Wales,’ takes exception to the remarks
of Messrs. Snodgrass and Heller® on the method of nesting of
this species at Cocos Island.
A young female (No. 1617 C. A. S.) in juvenal plumage,
was obtained at Clipperton. The scapulars, interscapulars,
and tertials are strongly washed with russet. The lesser
coverts, some of the feathers of the crown and of the sides of
the breast, and the two middle rectrices are edged with rus-
set terminally. The forehead has a faint tinge of the same
color. A few tufts of grayish down still adhere to some of
the feathers of the top of the head. The shafts of the pri-
maries are olive brown. Three outer rectrices on each side
of the tail have pure white shafts, and the remaining rectrices
have shafts that are white for the greater part of their length,
being olive brown only subterminally. In length of wing and
of tarsus this specimen exceeds the average of ten adult females
given beyond. It measures in millimeters as follows: Wing
250; tail 115; culmen 33.5; tarsus 13; middle toe 21.
In the Academy’s series of twenty adults, dark-shafted
rectrices are a marked feature. With a few exceptions, the
specimens are in somewhat abraded plumage. No. 1604,
male, Oneal Rock, July 27, seems to be in fresh feather ; occa-
sional pin-feathers in the crown, back, and rump, are appar-
1V. 34, p. 662, footnote.
2Proc:} Wash. Acad. Sci. v. 4) p: 511.
August 8, 1913
34 CALIFORNIA ACADEMY OF SCIENCES I Proc. 47H Ser.
ently bringing the moult to a close. Nine Clipperton skins,
August 10, are passing through what I take to be the post-
nuptial moult. In some cases it seems to be almost completed,
and, with the exception of No. 1619, it has reached the remiges
in every case. Renewal of rectrices seems to proceed from
the center laterally, renewal of primaries from the proximal
to the distal, and renewal of secondaries apparently from the
distal to the proximal. There are exceptions to these rules,
certain feathers coming in out of turn. Ten Cocos specimens,
taken during the first half of September, are in a similar state,
but, if anything, are not quite so far advanced as the Clipper-
ton specimens.
The bill of the adult bird in life is black at the tip, shading
through purple to indigo blue at the base.
MEASUREMENTS (in millimeters)
No. |Sex Locality Wing Tail Culmen Tarsus Middle
Toe
1604 | o | Oneal Rock 240 115 37.4 12.9 20.4
1619 | o&@ | Clipperton 223 110 38 12) Dies
1620 | o& | Clipperton 252 122 38.6 IY SRY 21.8
1621 | & | Clipperton 234 120 41 120i 220
1624 | o& | Cocos 240 119 38.6 11.9 22
1623 | & | Cocos 251 118 43 12-5 212
1607 | o& | Cocos 248 112 41.8 iL eai k 22
1606 | o& | Cocos 239 120 41 13.2 22.1
1605 | o | Cocos 248 ita la 40.5 12.6 21.6
1608 | &@ | Cocos 260 119 42.2 12.4 DLiae
1613 | 2 | Clipperton 241 122 41 12.8 22
1622 | @ | Clipperton 231 129 39 12 22
1612 | 9 | Clipperton 236 37 11.6 21
1615 | @ | Clipperton 235 107 36.7 12 \75) 21.2
1616 | @ | Clipperton 240 118 40.8 12 DD,
1618 | 2 | Clipperton 231 111 38.3 122 21.4
1614 | @ | Cocos 254 124 40 12.8 21.9
1611 | 2 | Cocos 237 116 39 1407 PRN}
1610 | 9 | Cocos 251 126 41.6 yh a 22
1609 | 2 | 40 miles south of
Cocos 245 122 38.9 12 22.4
The following is a summary of the above measurements:
Males—Wing 223-260 (244); tail 110-122 (117); culmen
37.4-43 (40.2); tarsus 11.9-13.2 (12.5); middle toe 20.4—
22.5 (21.7). Females—Wing 231-254 (241); tail 107-129
(119); culmen 36.7-41.6 (39.2); tarsus 11.1-12.8 (12);
middle toe 21-22.4 (21.7).
Vox. II, Pr. 1] GIFFORD—BIRDS OF THE GALAPAGOS ISLANDS 35
Creagrus furcatus: SWALLOW-TAILED GULL
Albemarle, Brattle, Champion, Charles, Chatham, Cowley,
Crossman, Culpepper, Dalrymple, Daphne, Delano, Enderby,
Gordon, Guy Fawkes, Hood, Indefatigable, islet off northeast
James, James, Kicker, Narborough, Seymour, Tower, and
Wenman islands.
This fine gull has been observed in the archipelago during
every month of the year, and is found commonly about the
small tufaceous islands and some of the high sea-cliffs of the
large islands. None were observed about Elizabeth Bay,
Tagus Cove, or Banks Bay, Albemarle Island, nor on east and
north Narborough in March and April. It is a bird of pow-
erful flight, often being seen many miles from land. The
farthest south it was observed was about 160 miles south-
west of Albemarle on June 9, 1906, and the farthest east was
about 150 miles east of Chatham on September 22, 1905. No
examples were met with north of the islands.
The single egg was usually laid in a slight depression lined
with bits of stone. When disturbed the gulls generally flew
off, leaving their eggs and young to the mercy of the intruder.
In one case, however, a parent remained on the nest and al-
lowed itself to be petted, not offering to bite. In many in-
stances, when a bird was caught, its main effort was to escape
rather than to defend itself. The young generally snapped
their bills threateningly when molested.
The Swallow-tailed Gull is known to nest in the Galapagos
Islands during eight months* of the year, as follows: On
Brattle in October; on Culpepper in July ;* on Hood in Janu-
ary, February, June, July, and October ;* on Tower in Sep-
tember and December ;* and on Wenman in July,® August,°
and December.’ The Academy’s series of eggs was taken
on Hood in February and June, and on Tower in September.
The eggs observed on Tower Island in the middle of Sep-
tember, 1906, were quite fresh, although a newly-hatched
1On page 190, volume 6, of Novitates Zoologicae, Messrs. Rothschild and Hartert
state that this species was “found breeding in October on Tower, and in
December on Hood Island.’”’ This is undoubtedly a mistake, as the Webster-Harris
Expedition visited Tower in December and Hood in October. See pp. 99. 103, 124,
2Nov. Zool., v. 6, p. 190.
*Ibid., pp. 99, 127.
4Tbid., pp. 104, 135.
'Ibid., v. 6, p. 190; v. 9, pp. 412, 413.
*Ibid., v. 6, p. 90.
™Proc. Wash. Acad. Sci avers eDszsce
36 CALIFORNIA ACADEMY OF SCIENCES [Proc. 4TH Ser.
chick was also seen. A number of young birds in the down
were encountered at Hood Island in February, all running
about in a lively manner. Two or three young just able to
fly were also noted walking about in hunched-up attitudes
among the adults, and apparently begging for food.
As a rule these gulls could be approached fairly closely.
After two visits to the islet off northeast James, however, the
birds of that place became quite wary, often flying before the
boat arrived within shot-gun range. As a rule this gull is
not lured to a decoy; but exceptions were observed south of
the archipelago, when two approached, one to examine a
wounded Dark-rumped Petrel, the other a wounded Peruvian
Booby.
Their enemies on land seemed to be the Galapagos Hawks.
Two young birds on Hood Island, which were tied up and
left for a short time, were killed and torn to pieces by one of
these birds. The Man-o’-war Birds often pursued the adult
gulls to make them disgorge, and the evolutions gone through
by both species were very surprising, the victim dashing about
in all directions. One poor gull was observed with two of
its enemies in pursuit. It did not disgorge, and as:a result
one of the pirates seized its foot, injuring it so that it hung
down, after which the tormentors desisted.
When flying, birds of this species seemed to have alternate
upward and downward movements of the body with
each stroke of the wings. Usually they flew ‘singly
or in flocks not exceeding half a dozen. On_ north-
east Indefatigable some were seen circling high in the air
without any discernible movement of the wings. They never
circled about the vessel except at sea. Birds were seen rest-
ing on the water in only two instances, once at Daphne and
once at sea. In the latter case a bird, which was flying close
to the water, alighted. Three others very high in the air
then came swooping down in long spirals, as Man-o’-war
Birds do, and sat on the water with the first bird. Whether
or not they were feeding, could not be ascertained.
I have never for a certainty observed them feeding, and
rather suspect that as a rule they do so at night. Their diet
seems to consist chiefly of squids, which both young and old
often disgorge when being killed. At Daphne five or six
Vor; li, Prt] GIFFORD—BIRDS OF THE GALAPAGOS ISLANDS 37
were seen hovering over a school of fish. Two birds taken
in latitude 2° 29’ South, longitude 90° 4’ West, had each a
specimen of water-strider of the family Hydrometridz in its
stomach; otherwise, save for wing-discs of pteropods, their
stomachs were empty.
On the cliffs of northeastern Indefatigable Island in No-
vember, and on Daphne in November and July, only adult
gulls were seen. The same remark applies to Tower Island
in the middle of September, 1906, save for one very young
chick.
In their descriptions of this species, both Mr. Ridgway’
and Mr. Saunders? fail to mention a pinkish blush on the
white of the under parts. This is quite marked in a number
of fine fresh-plumaged Academy specimens of both sexes,
taken about the first of August from the islet off northeast
James. All the birds captured at that place at that time had
enlarged reproductive organs, although some did not have the
pinkish blush. It was not noted to any extent in specimens
taken elsewhere.
This gull differs from Xema sabinii and other small
hooded gulls in its moult. The dark hood is apparently kept
the year around after the bird attains maturity. Nothing in
the Academy’s series would indicate the contrary, and the sub-
joined notes on this series seem to show that such is the case.
The study of moults and plumages in this species is compli-
cated by the fact that it has been found breeding on various
islands during eight months of the year.
Two specimens taken on Hood Island in latter September,
1905, are in fresh plumage. Scattered pin-feathers are yet
to be found in the white under parts and in the interscapular
region. In one specimen the distal primary of each wing is
still in the sheath basally. As this gull nests on Hood both
in June and October, the question is whether this moult, which
is just closing, is postnuptial or prenuptial. I am inclined to
believe it is the latter.
Two specimens from Brattle Island, male and female, Oc-
tober 30, are in fairly fresh plumage. No feather-growth is
indicated, however, and the feathers of the mantle show
slight wear in places. At the time of our visit to Brattle
1Proc. U. S. N. M., v. 19, p. 638.
2Cat. Birds Brit. Mus., v. 25, p. 166.
38 CALIFORNIA ACADEMY OF SCIENCES [Proc. 47H Ser.
Island, the birds were nesting, and an incubated egg was ob-
tained. These specimens may be safely said to exemplify the
breeding-plumage of the species.
The examination of twenty-one adults from Daphne Island
and northern Indefatigable, latter November, proves that the
birds are in fresh plumage. Feather-growth is attested in
many by the presence of pin-feathers in the back and the
breast, and by the sheaths at the base of the distal primaries.
Evidently the rectrices in this species are entirely renewed be-
fore the distal primary is fully grown. The question of
whether the moult just being completed is postnuptial or pre-
nuptial again comes to the front. The only light on the nest-
ing of this gull on Daphne is as follows: “Mr. Beck found
it very common on Daphne Island, where it was preparing for
nesting by the end of March.””*
Twenty-two adults taken on Hood Island in early Febru-
ary, when nesting operations were at their height, for the
most part show more or less wear. Ina few cases pin-feath-
ers are appearing in the interscapular region, but they are
appearing more commonly in the white under parts. These
pin-feathers evidently indicate the beginning of the postnuptial
moult.
Of a pair of birds, taken at sea on April 24 off southwest
Albemarle, the male is in worn adult plumage, and exhibits no
new feathers. The female, No. 1675, is apparently an immature
bird coming into its first adult plumage. Whether the moult
is prenuptial or postnuptial is impossible to say. The feet
are much paler than those of full adults. The tail is pure
white and the outer rectrices quite worn. The primaries also
show wear. Several white feathers in the sides of the head
are hidden by the dark ones, while numerous dark feathers
are appearing from their sheaths. This individual is evi-
dently in a stage somewhat similar to that shown by No. 1721,
mentioned below.
A female with small breeding-organs, taken at sea on May
8, is in rather worn plumage, and shows new dark feathers
replacing the old ones of the crown.
Three adults with enlarged reproductive organs were taken
at Hood Island about the first of July, the opening of a nest-
1Rothschild and Hartert, Nov. Zool., v. 9. p. 412.
Vot. II, Pr. I] GIFFORD—BIRDS OF THE GALAPAGOS ISLANDS 39
ing season. One specimen was in slightly worn plumage
dorsally, with pin-feathers still appearing in the breast; an-
other was in fresh plumage, apparently with no growing
feathers; the third, No. 1628, was in fresh plumage, with pin-
feathers in the white lower parts and the remains of a sheath
at the base of each distal primary. Now as these specimens
are, in all likelihood, in nuptial plumage, the presence of a
sheath at the base of a distal primary, in connection with the
freshness of all the primaries, would seem to indicate a pre-
nuptial moult of the flight-feathers as in the terns. Nothing
in the entire series contradicts this assumption, but, neverthe-
less, I do not feel that I have enough light on the subject to
assert positively that such is the case.
Thirty-three adults with enlarged sexual organs, from an
islet off the northeast coast of James Island, were taken late
in July and early in August. All are in fresh or slightly
worn plumage (primaries included) and exhibit but little or
no feather-growth. In these as well as in all other adults
examined, some of the tertials and longer scapulars are worn,
and not in harmony with the rest of the plumage. This is
undoubtedly due to two causes; first, that some of the feathers
are hold-overs, and second, that they are more subject to wear
than other parts of the plumage.
Of three specimens from Cowley Island, August 13, two
are quite fresh and show no pin-feathers. The third is some-
what worn, and has pin-feathers appearing in the back and in
the white under parts.
A female from Culpepper Island, September 25, 1906, is in
full fresh plumage, except for a much abraded long scapular
and somewhat ragged outer rectrices. No pin-feathers or
other indication of feather-growth are to be found. As this
species breeds on Culpepper in July, this specimen is probably
in postbreeding plumage.
A female (No. 1721 C. A. S.) taken at sea on May 8 is
adult in every particular, save that the hood is mottled with
pure white feathers, and the naked parts in life were paler
than they are in the average adult. Numerous new dark
feathers are appearing on the head to replace the worn white
ones. A few pin-feathers are also to be found in the back
and breast. The primaries and rectrices are slightly worn
40 CALIFORNIA ACADEMY OF SCIENCES [Proc. 41H Ser.
and are not those of the juvenal plumage, but are similar to
those of adults. The assertion might be ventured that this
specimen is assuming the first nuptial plumage. A few worn
feathers in the mantle, similar to those of adults, are of no
significance, since a few such feathers are common in birds in
juvenal plumage.
Quite a few white-headed young similar to the one de-
scribed’ by Mr. Saunders from Paracas Bay, Peru, were seen
at sea in May and June, and at Hood Island in February, June,
and September. Some have brownish tips to the crown-feathers,
but these disappear as the birds grow older, the crown becom-
ing pure white. The pale tips of the feathers of the back wear
off to some extent with increasing age, giving the upper parts
a much duskier appearance. There are gray feathers in the
backs of young birds in juvenal plumage, foreshadowing the
beautiful mantle of the adult stage. As remarked by Mr.
Saunders’ the primaries of the young are like those of the
adult in markings, even in the very youngest in which they
are developed enough for examination. They seem, how-
ever, to be more pointed and less rounded terminally than
those of the adult. Five June specimens fom Hood Island
are in juvenal plumage, more or less worn, but showing no
evidences of moult. The same remarks apply to a male taken
on Hood on September 28, 1905. Mr. Beck gives the fol-
lowing colors for the naked parts of a young female just
fully fledged: Bill blackish; feet grayish white.
In a downy young one (No, 1658 C. A. S.) taken on Hood
Island on February 6, the scapulars are just appearing, being
fawn-color with dark brown bases. The down of the upper
parts is brownish gray. Below it is chiefly white, shading to
pale gray on the throat and chin. Much of the white down
on the anterior part of the body has grayish hair-like tips.
On the posterior portion of the body the down seems to be in
two sections. The upper section in some cases is gray, and
the lower white. The gray grows from the tip of the white,
and at the junction of the two the filaments are gathered into
a single, slender, compact stem.
An examination of young Larus occidentalis at approxi-
mately the same age as the downy Creagrus furcatus was
1Cat. Birds Brit. Mus., v. 25, p. 166.
Wor. IT, Pr. 1] GIFFORD—BIRDS OF THE GALAPAGOS ISLANDS 41
fruitless as far as finding another case of double down was
concerned; nor did the examination of the downy young of
other Lariformes (Hydrochelidon nigra, Sterna forstert,
Sterna antillarum, Sterna fuliginosa, and Anous stolidus)
develop another instance. Dr. Dwight makes no mention of
such a condition in any of the Lariformes examined by him
in the preparation of his paper on The Sequence of Moults
and Plumages of the Laride (Gulls and Terns).
In the following table are given measurements of eleven
young gulls (in downy and juvenal plumages) taken from
the colony on southeastern Hood during the first week of
February, 1906.
MEASUREMENTS (in millimeters)
IN (mM Det. ee. fevcis< c= 1658) 1640) 1684) 1652) 1695|1642/1732/1726)1731/1729|1728
SIS Sone clomee neo oRie ENN opal tote SS AI ceopen RoR igo) tate Dan La Coi
@ulmentss oscc.tre ch ci 28 |29.7/31.3/38.5/39.2|40.5/41.8|42.5/43.9|44 47.2
PRATSUS Site eyes topo tone ay 30. 3/31.3/34.5/48.2/45.7/46.3/51.1/48 |48 |47.2\49.5
Middle Toe........ 32.434 136.144 [44 |45 /46.7|43 |45 |46.9|47
The colors of the naked parts of the adults in life were as
follows: Bill black, tip gray pea-green; rictus crimson; skin
in interramal space salmon-colored; orbital ring crimson; iris
dark brown; tarsus and toes peach-blossom pink; webs gerani-
um pink shaded with black at edges.
Forty-three adult males measure in millimeters as follows:
Wing 410-442 (424); tail 181-216 (196); culmen 50-55.5
(52.8); tarsus 45-56.5 (50.2); middle toe 44-51.3 (47.5).
Forty-seven adult females measure in millimeters as fol-
lows: Wing 406-432 (417); tail 181-210 (192); culmen
48.4-53.9 (51); tarsus 44.3-51.9 (48.1); middle toe 43-49.4
(45.8).
Five males in the flesh yielded the following measurements
in millimeters: Lengths 571, 580, 590, 591, 606; extents
1362, 1375, 1382, 1390, 1392. Three females gave the fol-
lowing results: Lengths 550, 560, 573; extents 1241, 1318,
1330.
1Auk, v. 18, pp. 49-63.
42 CALIFORNIA ACADEMY OF SCIENCES [Proc. 47H Ser.
The remarks’ by Messrs. Rothschild and Hartert as to the
markings and shape of the eggs of this species apply ad-
mirably to the Academy’s series of thirty-six eggs. The ex-
treme and average measurements of this series are summar-
ized as follows: Length 62.1-72.5 mm. (66.3 mm.) ; breadth
4447.6 mm. (45.9 mm.).
Larus franklini: FRANKLIN’s GULL F
Albemarle, Chatham, and Narborough islands.
Three specimens of this gull have been taken in the islands;
the first by Messrs. Snodgrass and Heller? at Mangrove Point,
Narborough Island, in March; the second by Mr. Hunter at
Sappho Cove, Chatham Island, on February 10, 1906; and
the third by Mr. Hunter at Villamil, Albemarle Island, on
March 6, 1906.
Both the Albemarle and the Chatham specimens were in
worn plumage. The former was an immature male, infested
with mallophaga, and the latter an immature female. Com-
pared with the Sooty Gull, they were quite wild.
Larus fuliginosus: Sooty GULL
Abingdon, Albemarle, Barrington, Bindloe, Brattle, Cham-
pion, Charles, Chatham, Cowley, Crossman, Daphne, Dun-
can, Hood, Indefatigable, islet off northeast James, Jervis,
Narborough, Seymour, and Tower islands.
Unlike the Swallow-tailed Gull, the Sooty Gull is not a
bird of the sea-cliffs and ocean, but instead is found com-
monly about the shores and lagoons of many of the islands.
Although taken at Hood Island by other expeditions, we did
not meet with it there during any of our three visits. At
Barrington, Brattle, Cowley, Crossman, Daphne, Duncan, and
Jervis islands it was not common. Evidently birds fly from
island to island, as their occurrence at places where they do
not seem to be resident would show. On August 13, while
we were en route from Cowley Island to Duncan, two or
three were seen several miles from land.
More than once during the breeding season a pair of gulls
would swoop several times at a human intruder in an evident
1INov. Zool., v. 6, p. 190.
2Proc. Wash. Acad. Sci., v. 5, 237.
Voz. II, Pr. I] GIFFORD—BIRDS OF THE GALAPAGOS ISLANDS 43
attempt to frighten him away from a nest near by, which,
however, was never discovered. The only egg known was
taken by the Webster-Harris Expedition on November 10,
1897,* from a bird shot on Albemarle Island.
Sexual organs of birds taken in October and November
were large, while some adult birds taken off south Albemarle
about the Ist of May were in fresh plumage and had large
sexual organs. Mr. Beck wrote on the label of a male from
Seymour, taken July 25, “testes large.”
Wherever they were at all common, they came about the
vessel, usually circling many times and often alighting on
the water or on the booms, railings, etc., of the vessel, being
fully as bold as the Glaucous-winged Gulls (Larus glauces-
cens) about San Francisco Bay, California.
The flight of this species is similar to that of other gulls of
the same genus. They can walk and run quite swiftly, and,
when rising from the ground, usually run three or four feet
and rise against the wind. Like most other gulls they are
readily attracted to wounded or dead birds.
The Sooty Gull is certainly a scavenger of the first order.
Whenever tortoises or turtles were skinned on board the
schooner, several gulls would loiter about picking up refuse.
At Villamil, Albemarle Island, it was a common sight to see
them feeding with the chickens about the village and under
the houses, Satie in most cases were placed on timbers sev-
eral feet above the ground. On the beach west of Villamil,
forty or fifty gulls were one day observed feeding on the
putrid remains of a turtle.
The following notes were made at Villamil on August 20:
There were a dozen gulls feeding near a house where a bull
had been slaughtered. Some were tugging away at bits of
fat and flesh, often bracing themselves ean their feet. Oth-
ers were feeding ona fech hide that had just been staked out
to dry. Two or three adults were bullying the younger birds.
Whenever an adult desired a piece of meat on which one of the
younger ones was pulling, he would lower his head, arch his
neck, and give a long cackling call, at the same time making
a short rush at the enemy. The young birds alw ays got out
of the way when such tactics were pursued. There was one
*Nov. Zool., v. 6, p. 189; v. 9, p. 413.
44 CALIFORNIA ACADEMY OF SCIENCES [Proc. 47H Ser.
immature bird imitating the calls of the adults, its voice, how-
ever, being harsher. Both young and adults had a wholesome
respect for dogs and chickens. They would allow a man to
approach within four or five feet of them before flying or
running.
At Wreck Bay, Chatham Island, about three weeks later, I
saw three adults chasing other adults about and making the
same long cackling calls, always standing very erect-for a mo-
ment before giving the call. In this case their actions may
have been a form of courtship.
This species calls throughout the year, uttering a short
squawk as well as the long cackling call, which latter can best
be described as beginning with a chuckle and then breaking
into a cackling laugh.
Not infrequently this species was seen in company with
various other birds. Of such association the three following
instances are good examples: 1. One day in early March
there were a good many paddling about and calling in one
of the lagoons near Villamil. Intermingled with them were
Egrets, Galapagos Herons, Bahama Pintails, and Black-
necked Stilts. 2. At southeast Narborough this species was
noticed in company with Blue-footed Boobies, Flightless Cor-
morants, Brown Pelicans, and Galapagos Herons, on a small
islet about ten by thirty feet in dimensions. 3. Ona rocky
point on the northeast side of James Island a gull was seen
standing in the midst of a compact flock of Blue-footed
Boobies.
Their competitors on the water seemed to be chiefly the
Graceful Petrel and the Man-o’-war Bird. These two species
were usually present whenever there was any refuse about.
Other petrels of the Dusky Shearwater also entered in a
lesser degree into the competition. About the settlements,
chickens, dogs, cats, and pigs were their chief rivals.
The feet of individuals of this species seem to be subject to
a good many accidents, for specimens with split webs were
frequent and those with deformed toes occasional.
The plumages of this species have been so thoroughly de-
scribed by previous writers that there is little to add, so far
as the Academy’s series is concerned. The white streak on
each eyelid, which characterizes the adults, is represented in
Vor. II, Pr. I] GIFFORD—BIRDS OF THE GALAPAGOS ISLANDS 45
the young birds by a faint gray streak, which gradually whit-
ens with successive moults.
In the manner and extent of its moults and plumages this
species seems to accord strictly with Larus heermanni and
the other larger gulls treated of by Dr. Dwight in his paper
on The Sequence of Moults and Plumages of the Larid@
(Gulls and Terns).t The study of the moults and plumages
is of course complicated by the lack of definite data concerning
the breeding of the species. It is very evident from the
Academy’s series that there is great latitude in the time at
which different individuals start on a stated moult. Birds
taken on the same day and in the same locality sometimes
differ widely in their state of plumage. Further indication
of an extended breeding season is found in two birds in juve-
nal plumage, one taken on south Albemarle on November 1,
the other taken on Chatham on July 7. A pair of adults
taken on Charles Island, October 5, were evidently nesting,
judging from the bare skin in two places beneath the feathers
of the abdominal region. The absence of growing feathers
shows that the postnuptial moult had not commenced. The
adults of this species do not lose the dark hood at the post-
nuptial moult as do the smaller hooded gulls, but on the con-
trary replace it with another.
The following examples of albinism were noted in handling
the Academy’s series: No. 1759; nearly adult male; white
feather in foreneck. No. 1735; adult male; conspicuous
white streak in one web of scapular on right side. No. 1770;
adult male; white feather in crown.
Colors of naked parts in life were noted as follows: 1.
High-plumaged adult—Bill dark bay shading into black near
tip; tip of maxilla burnt sienna; feet dark prune purple, with
webs bay beneath and toes rufous beneath; orbital ring dark
crimson. 2. Nearly adult female (No. 1793 C. A. S.) with
some dark markings in the tail—Bill and feet black; tip of
maxilla burnt sienna. 3. Immature—Bill, orbital ring, and
feet black; under sides of webs gray.
The following condensed measurements in millimeters are
taken from forty-nine males and fifty-five females. There
seems to be no appreciable difference in the dimensions of
Auk, v. 18, pp. 49-63.
46 CALIFORNIA ACADEMY OF SCIENCES [Proc. 47H Ser.
adult and immature birds. Two females measured respect-
ively in the flesh 445 and 450 millimeters in length, and 1075
and 1095 in extent.
Males—Wing 343-373 (357) ; tail 133-154 (145) ; culmen
40.5-47 (43.9); tarsus 47-54.8 (51.7); middle toe 38.5—45
(42). Females—Wing 330-358 (344) ; tail 130-147 (138) ;
culmen 37.5-45 (41.4); tarsus 45.3-53.5 (49.9) ; middle toe
36.5-44.3 (40.3). =
Stercorarius pomatorhinus: POMARINE JAEGER
Albemarle Island.
Mr. Beck shot a female Pomarine Jaeger off northern Albe-
marle Island* on December 15, 1897.
North of the Galapagos Islands this jaeger was occasionally
met with, three being taken by Mr. Beck during the home-
ward voyage. Two females were captured on October 5 in
latitude 14° 28’ North, longitude 107° West. A young male
(No. 1849 C. A. S.), taken on November 14 in latitude 33°
7’ North, longitude 134° 6’ West, had the naked parts in life
as follows: Iris dark brown; orbital ring black; nasal shield
gray; bill broadly tipped with very dark brown; lower mandi-
ble lavender-gray, except distal portion; tarsi very pale blue;
webs and toes almost entirely black, save at junction with
tarsi.
Two Parasitic Jaegers (Stercorarius crepidatus) were
taken at sea—one about thirty miles west of San Martin
Island, Baja California, on July 10, 1905, and another in lati-
tude 15° 36’ North, longitude 110° 12’ West, on October 13,
1906. On September 30, 1906, in latitude 10° North, longi-
tude 100° 25’ West, one followed the schooner for several
minutes.
Arenaria interpres: TURNSTONE
Abingdon, Albemarle, Barrington, Bindloe, Brattle, Charles,
Chatham, Culpepper, Daphne, Gardner-near-Hood, Hood,
Indefatigable, James, Jervis, Narborough, Seymour, Tower,
and Wenman islands.
Although nowhere found breeding, this species was ob-
served by us on all of the above islands and in every month
of the year. It proved to be the commonest shore-bird of the
INov. Zool., v. 6, p. 192.
Vor. II, Pr. I] GIFFORD—BIRDS OF THE GALAPAGOS ISLANDS 47
archipelago, and was found in the uplands as well as along
the seashore. Between May 28 and June 23, however, but
one individual was seen, and that was at Charles Island on
June 1.
A few were seen at Wafer Bay, Cocos Island, Costa Rica,
on September 4 and 13, 1905.
Of several individuals killed at Tagus Cove, March 29,
some were in high plumage, while the majority were in transi-
tion. The sexual organs, however, showed only slight en-
largement. A male, taken on southeastern Albemarle on
May 1, was in high feather. Specimens captured on Hood
Island, on June 23, had small reproductive organs, as did three
or four obtained at Academy Bay, Indefatigable Island, on
July 14.
Hematopus galapagensis: FRAZAR’S OySTER-CATCHER
Hematopus frazari Brewster, Auk, v, 1888, 84 (Carmen
Island, Gulf of California).
Albemarle, Barrington, Bindloe, Charles, Chatham, Gard-
ner-near-Hood, Hood, Indefatigable, James, Narborough,
Seymour, and Tower islands, Delano Rock, and islets east
of Jervis Island.
As suggested’ by Mr. Ridgway, Hematopus galapagensis
and Hematopus frazari are undoubtedly one and the same
species. Mr. Ridgway “reduces the alleged color differences
between that bird [Hematopus galapagensis| and the Lower
Californian form described as H. frazari by Mr. Brewster to
two, namely, the smaller amount of dark color on the under
surface of the wing and the partially spotted or barred under
tail-coverts of the latter.’””
A thorough examination of the Academy’s material, twenty
specimens from Baja California and forty-four from the
Galapagos Islands, demonstrates that the “greater amount of
white on the under primary coverts”’ of the so-called Hemato-
pus frazari is an absolutely worthless character, as the series
from both regions show an almost equal range of variation in
respect to the coloration of these coverts. Twelve of the
forty-four Galapagos specimens exhibit partial dark edgings
on certain of the under tail-coverts; all, however, to a much
1P'roc. U.S. Ni M-, v. 19) p. '623:
2Ibid., p. 624.
48 CALIFORNIA ACADEMY OF SCIENCES [ Proc. 4TH Ser.
less degree than shown by the average Baja California speci-
mens. One female (No. 1941 C. A. S.) from the latter
region, has no dark edgings on the under tail-coverts—a con-
dition perhaps due to wear.
As shown by the measurements of Table VI, p. 114, there
are but slight differences between average specimens from
the two localities. The Galapagos birds average larger in
length of culmen and length of middle toe, while the Baja
California birds average larger in length of wing and length
of tail. The measurements of the two series, however, over-
lap, and in the absence of constant color characters, it is im-
possible to find in the slight differences in the average meas-
urements any basis for specific distinction.
Three young males from the Galapagos Islands (Nos.
1893, 1902, and 1930 C. A. S.) have down adhering to
some of the juvenal feathers, considerable gray down on the
throat, and primaries not full grown. Many of the scapulars,
interscapulars, tertials, and wing-coverts are marked termi-
nally with a narrow light-brown edge, and subterminally with
a narrow dark-brown or black bar. The tarsi are very much
swollen near the suffrago. This swelling, however, disap-
pears as the birds grow older. In dried skins the young have
the naked parts of a much darker color than the adults.
In two older specimens (Nos. 1891 and 1892) still show-
ing traces of down on the rectrices, the brown edgings are
yet present on the wings, but have disappeared from the back,
having evidently been removed by wear. New feathers are
appearing in the back, head, neck, and breast of these
two specimens. The new feathers have no brown margins,
but appear indistinguishable from those of adults. Inasmuch
as the birds still show traces of neossoptiles, it is assumed that
this moult is postjuvenal and not prenuptial.
The measurements of the five young birds are given below.
MEASUREMENTS OF YOUNG BIRDS (in millimeters)
Number | Sex Island Date Culmen | Tarsus | Middle Toe
1930 o | Hood February 1 52 46.8 36
1902 co | Hood February 1 59.8 50.8 39.6
1893 o' | Narborough | March 22 63.1 50.7 36.5
1891 9 | Seymour July 26 80 49 Sie
1892 2
James August 4 76 48.1 38.2
Vor. LI; Pr. 0) GIFFORD—BIRDS OF THE GALAPAGOS ISLANDS 49
No. 1913, female, Hood Island, September 28, 1905, is
evidently a young bird starting on its first prenuptial moult.
The primaries are old and worn, and some feathers much
bleached and worn remain among the lesser coverts. In addi-
tion to the dusky bill and feet, this bird has a sharp line of
demarcation between the black and the white on the upper
breast.
No. 1909, male, Indefatigable Island, July 16, is in fresh
plumage. The distal primary in each wing, however, is not
full grown, but is pulpy at the base. The feet are dusky com-
pared with those of adults, and it is probable that the specimen
is a young bird going through either its first prenuptial or
first postnuptial moult. Again the line of demarcation of the
black and white on the breast is sharp, while in adults such is
not the rule.
No. 1888, male, Abingdon Island, September 18, 1906, is
in about the same state as the specimen just discussed, or per-
haps a little younger. The line of demarcation on the upper
breast is sharp, and the naked parts are dusky. It is difficult
to say whether this bird is completing its first prenuptial or its
first postnuptial moult.
The following notes are on obvious adults: Five speci-
mens taken on Hood Island and Gardner-near-Hood in latter
September, 1905, are all in moult, and have primaries in some
stage of growth. As the sexual organs of these birds showed
signs of activity, and as we obtained young on the first of the
following February, it seems as though the moult in progress
is the prenuptial, and that this species moults its flight-feathers
twice a year.
Four specimens from Indefatigable Island, secured during
the second half of October, are moulting. One has worn pri-
maries, another has new full-grown primaries, while the re-
maining two have the distal primaries. still pulpy basally.
Three November individuals, however, are in fresh plumage,
the primaries just having attained full growth. In two cases
traces of a sheath are discernible at the base of the distal
primary.
The next specimen in order of capture is a male taken on
James Island on December 26.. Except for somewhat worn
primaries, this bird is in fairly fresh plumage, and has a con-
August 8, 1913
50 CALIFORNIA ACADEMY OF SCIENCES [Proc. 41H Ser.
siderable number of pin-feathers in the body plumage. It is
perhaps completing its prenuptial moult, or possibly starting
on its postnuptial.
Four January birds, three from Indefatigable Island and one
from Hood, are in all likelihood beginning the postnuptial
moult. All show pin-feathers and newly-expanded feathers
in the body, and one shows new inner rectrices.
Two specimens from Hood Island and three from Chat-
ham were taken during February. All show a moult in prog-
ress, and in one case the primaries have been renewed in
part. Undoubtedly these birds were engaged in the post-
nuptial moult. The sexual organs of two of the specimens,
obtained on February 14, were noted as small.
In addition to the young one shot on Narborough Island on
March 22, a female (No. 1914) in worn plumage was se-
cured. This bird showed the renewal of the body-plumage to
be taking place. It was in practically the same state as the
two adults taken on Hood Island on February 1, while the
young one was-of about the same age as the two young taken
on Hood on February 1. This would seem to indicate a later
breeding-season on Narborough than on Hood, or at least an
extended breeding-season. No. 1925, Tagus Cove, Albemarle
Island, March 29, is in the same stage as No. 1914.
A gap of nearly four months occurs in the dates of the series,
the next specimens being five July adults from Indefatigable
and Seymour islands. All show pin-feathers. Three are in
fresh plumage: one with full-grown primaries, one with the
distal primary growing, and one with it not yet renewed. A
fourth specimen has worn feathers in the wings, tail, etc., and
has only the two inner primaries new. The fifth bird has
many worn feathers in the wings and interscapular region,
and shows only the proximal primary and a central rectrix
new.
A male and a female from James Island, taken on July 28
and August 3, respectively, are in the midst of a moult involv-
ing body, wings, and tail. Five individuals from Tower,
Bindloe, and Abingdon islands, secured from the 15th to the
18th of September, 1906, are in the last stages of a moult in-
volving the entire plumage. It is impossible to say whether
Vou. II, Pr. I] GIFFORD—BIRDS OF THE GALAPAGOS ISLANDS 51
it is prenuptial or postnuptial, as I have no observations on
the reproductive organs.
It not infrequently occurs that some of the middle wing-
coverts, when fresh, have a narrow white margin. I do not
know of what significance these are.
Specimens from Baja California obtained about the middle
of July, 1905, are in worn plumage. All are beginning the
postnuptial moult. In one case a bird is getting a new rectrix,
but in all others nothing beyond the body-plumage has been
affected.
Frazar’s Oyster-catcher was found to be quite evenly dis-
tributed on all of the islands named above, but seldom more
than three or four individuals were seen at one time. Singly
or in pairs, we met with them along the rocky coasts, where
they did most of their feeding. Occasionally they were seen
on the sandy beaches, which are quite extensive on the larger
islands. As a rule they were very fearless, and several were
killed with stones.
In traveling over the smooth beaches this species either
walks or runs, being able in the latter case to travel quite
rapidly. One day on South Seymour two kept just ahead of
us for about one hundred yards along a beach, running slowly
all the time. When anchoring at James Bay, James Island,
on August 6, three flew by the vessel, and later we met them
on the beach. They alighted a hundred yards or so above us,
and then started on the run in our direction. They acted as
though they were racing, keeping abreast most of the time,
and maintaining a steady pace. When among the rocks, these
birds do considerable jumping from one rock to another, often
using their wings to aid them.
Their flight is nothing like that of a snipe for swiftness and
gracefulness, nor is it as erratic as the Hudsonian Curlew’s.
Usually, when over the water, the birds fly at a height of ten
or twenty feet, while along the shores they keep lower down.
Their wing-beats are more rapid than a gull’s.
On two occasions this species was observed swimming, but
not through choice. In one case a wounded one took to the
water, and, upon being approached with the boat, dived three
or four times. Another individual, wounded while flying
52 CALIFORNIA ACADEMY OF SCIENCES [Proc. 4TH Ser.
over the water at the San Benito Islands, Baja California, did
the same thing and was captured only with great difficulty.
Aside from one instance, these oyster-catchers are always
noted feeding on the rocks from which they pick their food.
The food consists of small chitons, small crabs, sea-slugs, and
key-hole limpets, which are chiefly obtainable at low tide.
These creatures are all swallowed whole.
Many times the presence of this species is made known, not
by the eye, but by the ear. Asa rule they call when disturbed,
and when flying from place to place. The call is loud and
piercing, and consists of a series of piping notes given in
quick succession, and slightly resembles the call of the Wan-
dering Tattler. Single short staccato notes are also uttered
when a bird is approached.
Three specimens, which showed signs of breeding, were
taken on Gardner-near-Hood on September 28, 1905. Sex-
ual organs of birds taken at Sappho Cove, Chatham, February
14, and at Academy Bay, Indefatigable Island, July 16, were
small. A female with medium-sized ovaries was taken on
Narborough on March 22.
On February 1, two young ones scarcely able to fly were
taken on southeast Hood. They were feeding in company
with two adult birds, presumably their parents. On March
22 a young one of about the same age was taken on Narbor-
ough. Another was taken on South Seymour on July 26, and
still another on northeast James on August 4.
While I was approaching a wounded one on northwest In-
defatigable, one of several Galapagos Hawks roosting in the
vicinity made a sudden swoop at it. Uttering a shrill cry, the
oyster-catcher sought safety by jumping into the water close
beside a sheltering rock. It is doubtful whether the oyster-
catchers are harassed by the hawks under normal conditions.
Like the Wandering Tattler, but not to such a great extent,
this species has the habit of bobbing the posterior portion of
the body up and down.
One bird taken had the outer covering of the upper mandi-
ble loose and apparently ready to shed, for it was very easily
detached, leaving a new, hard, and darker-colored bill beneath.
Another specimen was minus the greater part of its tongue,
having only about one quarter of an inch of it left.
Wor. D1) )Br: 1) GIFFORD—BIRDS OF THE GALAPAGOS ISLANDS 53
In Baja California the species was first met with on San
Martin Island, July 11, 1905, where one was seen in com-
pany with seven Black Oyster-catchers (Hematopus niger)
on the shores of the lagoon. At the next stop, San Geronimo
Island, July 13, eight of the first species and twelve of the
second were observed, all on the rocks along the beaches.
They proved fairly easy of approach, and when flying kept up
a continual calling. At the San Benito Islands, July 14 and
15, Frazar’s Oyster-catcher was in the ascendency, ten or a
dozen being seen each day to only one of the Black, while at
South Bay, Cerros Island, July 18, it was fairly common, and
only two or three Black Oyster-catchers were encountered.
Squatarola helvetica: BLACK-BELLIED PLOVER
Albemarle, Charles, Chatham, Hood, Indefatigable, and
James islands.
The Black-bellied Plover was not common, but was ob-
served a dozen or more times on the above islands, where it
was very wild. There was an interval of three months dur-
ing which the species was not seen—April 25 to July 28.
Mr. Beck reports’ having seen two Black-bellied Plovers
on Clipperton Island on November 19, 1901.
Two Wilson’s Plovers (Ochthodromus wilsoni) were taken
on Cocos Island, Costa Rica; a male on September 4 and a
female on September 11, 1905.
fEgialeus semipalmatus: SEMIPALMATED PLOVER
Abingdon, Albemarle, Bindloe, Charles, Chatham, Inde-
fatigable, James, Jervis, and Narborough islands.
Quite a number of this species were observed about the
islands from July to April. The earliest bird was noted on
July 17 and the latest on April 25. Like the Turnstone, they
were found in the grassy uplands as well as on the coast.
On September 4, 6, and 11, 1905, a few were seen on the
beach at Wafer Bay, Cocos Island, Costa Rica, where three
males were secured.
1Condor, v. 9, p. 109.
54 CALIFORNIA ACADEMY OF SCIENCES [Proc. 41TH Ser.
Himantopus mexicanus: BLACK-NECKED STILT
Plate I, Fig. 2
Albemarle, Charles, Chatham, Hood, Indefatigable, James,
and Seymour islands.
This noisy bird we found to be rather common on the above-
_ mentioned islands with the exception of Hood and Seymour.
On February 25 a nest containing four eggs incubated
about seven days, was found on a small flat lava-islet in the
large lagoon at Cormorant Bay, Charles Island. The islet
projected less than five inches above the surface of the lagoon.
The nest was composed of twigs, small pieces of moss taken
from the lagoon, and bits of lava placed in a slight depression
in the rock. Close by were seven Flamingo nests in use.
The eggs measure in millimeters, respectively: 4129.5,
42.4X29.5, 41.9X29.8, 41.6X29.9. The Academy has of
this species twenty clutches of four eggs each, from Merced
County, California. All were taken by Mr. Beck in May and
June, 1908, showing that, so far as known, the breeding-sea-
son in the Galapagos is much earlier than in California.
Numenius hudsonicus: HupsONIAN CURLEW
Albemarle, Charles, Chatham, Hood, Indefatigable, James,
and Narborough islands.
This species was observed quite commonly about Albemarle,
Charles, Indefatigable, and James islands, proving to be a
bird of the interior as well as of the shore. On Charles Island
it was found in considerable numbers in the open stretches
among the low trees and bushes at an altitude of a thousand
feet on the west side of the island, as well as in the pasture
lands of the interior. At Villamil, Albemarle Island, it was
not infrequently seen perching in the tall, bare, dead trees
close to the village and about the large lagoon.
From the time we arrived at the islands up to the latter part
of April, curlews were fairly common. One or two individu-
als were noticed at Villamil as late as May 2. One was shot
on Hood Island on June 25. From July 14 on, they were
seen frequently.
Only one was encountered at Cocos Island, Costa Rica—a
female in worn plumage, shot on the beach at Wafer Bay on
Vot. II, Pr. I] GIFFORD—BIRDS OF THE GALAPAGOS ISLANDS 55
September 12, 1905. Mr. Beck reports’ having seen one on
Clipperton Island on November 19, 1901.
Symphemia semipalmata: \WWILLET
Abingdon and Albemarle islands.
On November 1, 1905, a Willet was seen on the ocean
beach near Villamil, Albemarle Island. Another was ob-
served in the same locality with a small flock of Hudsonian
Curlews on September 3 of the following year.
A male (No. 1980 C. A. S.) was captured on a beach on the
south side of Abingdon Island, September 21, 1906.
Helodromas solitarius: SOLITARY SANDPIPER
Chatham Island.
Two specimens are reported from Chatham Island, October
12, 1897, by Messrs. Rothschild and Hartert in the Novitates
Zoologicae® for the year 1899. I know of no other record of’
this species from the Galapagos Islands.
Heteractitis incanus: WANDERING TATTLER
Abingdon, Albemarle, Barrington, Bindloe, Brattle, Cham-
pion, Charles, Chatham, Culpepper, Duncan, Gardner-near-
Hood, Hood, Indefatigable, James, Jervis, Narborough, Sey-
mour, Tower, and Wenman islands.
The shrill, piping call of the Wandering Tattler was a very
characteristic sound of the Galapagos coasts. As a rule lone
birds were seen, but on February 1, 1906, a flock of nine was
noted on Hood Island, while a flock of a dozen was seen on
Clipperton Island, Mexico, on August 10, 1905. In the Gala-
pagos Islands the species proved to be a common one, and
was observed throughout the year except from April 11 to
June 25. At Cocos Island, Costa Rica, during the first half
of September, 1905, a few were seen along the rocky shores.
On two occasions Wandering Tattlers were seen in unusual
situations. On Indefatigable Island several were seen feed-
ing in the salt lagoons, while on south Albemarle I saw one
1Condor, v. 9, p. 109.
2V. 6, p. 188.
56 CALIFORNIA ACADEMY OF SCIENCES [Proc, 47H Ser.
alight in a bare dead tree on the shore of a lagoon at least a
quarter of a mile inland.
Tringoides macularius: SpoTTED SANDPIPER
Abingdon and Albemarle islands.
A male (No. 1990 C. A. S.) shot at Villamil, Albemarle
island, on May 2, 1906, was in fairly high plumage. ~ A sec-
ond individual was seen on the south shore of Abingdon Island
on September 22, 1906.
In 1905, two females, Nos. 1991 and 1992, were taken on
Cocos Island, Costa Rica, on September 4 and 7 respectively.
Several examples were observed daily on September 4, 5, 6,
7, 8, and 11, at both Chatham and Wafer Bays.
On September 13 a female Semipalmated Sandpiper
(Ereunetes pusillus), No. 1993 C. A. S., was taken on the
beach at Wafer Bay.
Calidris arenaria: SANDERLING
Abingdon, Albemarle, Bindloe, Charles, Chatham, Hood,
James, Jervis, and Seymour islands.
The Sanderling was seen only two or three times in the
saline coastal lagoons, but was fairly common on certain occa-
sions on the ocean beaches. It was observed in July, August,
October, November, February, and March. Like the Black-
bellied Plover, it was very shy and difficult of approach.
Limonites minutilla: LEAST SANDPIPER
Abingdon, Albemarle, Barrington, Charles, Indefatigable,
and James islands.
The Least Sandpiper was not infrequent, being noted on
all of the above-mentioned islands during the months of July,
August, September, October, November, and February. On
July 28 several were observed in a large lagoon on northeast-
ern James; with them were a number of Hudsonian Curlews,
Black-bellied Plovers, and Semipalmated Plovers. They
haunted the ocean beaches as well as the lagoons.
A few were seen at Wafer Bay, Cocos Island, Costa Rica,
on September 4 and 11, 1905, specimens being secured.
eo
Vor. II, Pr. I] GIFFORD—BIRDS OF THE GALAPAGOS ISLANDS 57
Heteropygia bairdi: Barrp’s SANDPIPER
Barrington Island.
The Webster-Harris Expedition captured a male on Bar-
rington’ on October 6, 1897.
A male (No. 2004 C. A. S.) was taken at Wafer Bay, Cocos
Island, Costa Rica, on September 4, 1905.
Phalaropus hyperboreus: NORTHERN PHALAROPE
Albemarle, Indefatigable, James, and Narborough islands.
No specimens of the Northern Phalarope were taken, but
we saw the species at times about the archipelago. Two or
three bands of about twenty each were seen on the water on a
very foggy morning, April 10, in Banks Bay, Albemarle
Island.
On August 13, while sailing from Cowley Island to south
James, hundreds of phalaropes, apparently of this species, were
seen near the latter island. They were flying south close to
the water, while a few were seen on the water. It was a
cool day with a brisk southeast wind.
In the early afternoon of September 12, when about ten
miles southwest of Indefatigable Island, we came upon thou-
sands of phalaropes in large compact flocks, mostly on the
water. The flocks were close together, and as far as one
could see, looking from the deck towards Indefatigable, the
water was dotted with them. The sky was overcast, the
temperature moderate, and the usual southeast trade wind was
blowing.
On August 18, 1905, in latitude 7° 24’ North, longitude
103° 52’ West, three Red Phalaropes (Crymophilus fulicarius)
were seen, two of them being taken.
Steganopus tricolor: WILSON’s PHALAROPE
Albemarle Island.
On November 3, 1905, two males and one female were shot
on a small saline lagoon about half a mile inland from the
village of Villamil, Albemarle Island. They were very tame
and unsuspicious.
1INov. Zool., v. 6, p. 188.
58 ri CALIFORNIA ACADEMY OF SCIENCES [ Proc. 47H Ser.
The specimens are in process of moult from the juvenal
plumage to the postjuvenal plumage, being in about the same
stage as a young female (No. 13475 C. A. S.) taken in Mer-
ced County, California, on September 3, 1908. The upper
parts, particularly the wing-coverts, still contain a good many
of the feathers edged with light sandy-buff that characterize
the young.
Ardea herodias: GREAT BLUE HERON
Albemarle, Charles, Chatham, Duncan, Hood, Indefati-
gable, James, Narborough, and Seymour islands.
Although usually solitary, Great Blue Herons are not un-
common on the central and southern islands. They seemed
to be confined to the vicinity of tide-water, and did not fre-
quent the salt lagoons, which were the haunts of the Flamin-
goes and Egrets.
They lacked the wariness of northern birds, and at times
would allow approach to within a few yards. On one occasion
an individual followed me about on wing in a mangrove
swamp, apparently from curiosity. Each time I moved away a
short distance, it would leave the tree on which it had settled,
and fly to another near by, and crane its neck and peer down
at me. At another time one was attracted to a dead bird of
the same species, although a party from the schooner was
standing in plain view within twenty-five yards.
A bird with enlarged sexual organs was shot on the north-
western part of Indefatigable Island on July 23. Three
months later Mr. Hunter obtained on southeastern In-
defatigable a nearly naked young one, with pin-feathers just
appearing, while Messrs. Rothschild and Hartert report a
clutch of three fresh eggs on that island on September 2.7
Messrs. Snodgrass and Heller found a set of three eggs on
Narborough Island in January.” As with the Frazar’s Oyster-
catcher, the breeding-season appears to be quite extended, or
else it is later on Narborough than on the islands to the
eastward of Albemarle.
There seem to be no color characters distinguishing Gala-
pagos specimens of the Great Blue Heron from middle-Cali-
Nov. Zool., v. 6, pp. 93, 115, 180.
2Proc. Wash. Acad. Sci., v. 5 p. 254
Vor. II, Pr. I] GIFFORD—BIRDS OF THE GALAPAGOS ISLANDS 59
fornia specimens, except that the colors of the latter average
a trifle darker. A comparison of the measurements of adults
from the two localities (Table VII, p. 114) show that the Gala-
pagos specimens average smaller in length of wing, tail, and
tarsus, and larger in length of culmen.'
Herodias egretta: EGRET
Albemarle and Indefatigable islands.
Unlike the Great Blue Heron, this species was wary and
very difficult to obtain, perhaps on account of the fact that the
natives hunted it somewhat for its plumage. It could be ap-
proached only under cover. A few individuals were often seen
about Villamil, Albemarle Island, perching in some high tree
in the midst of an impenetrable mangrove swamp, or else
standing in some inaccessible part of a lagoon.
Unlike the Great Blue Heron, the Egret frequented the
saline coastal lagoons, which are unaffected by tides. At Vil-
lamil, one day in March, I saw fifteen of them in the large
lagoon. On November 29 one was taken in a lagoon on
northern Indefatigable Island, opposite Daphne.
The measurements of Table VIII, p. 115, show that the Cali-
fornian specimens average slightly larger than those from the
Galapagos Islands; the series of the latter, however, is very
small.
Nyctanassa violacea: YELLOW-CROWNED Nicut HERON
Plate I, “Fies 1
Abingdon, Albemarle, Bindloe, Brattle, Champion, Charles,
Chatham, Duncan, Gardner-near-Hood, Hood, Indefatigable,
James, Jervis, Narborough, Seymour, and Tower islands.
The Yellow-crowned Night Heron was fairly common in
the archipelago, being found along the shores of the above-
mentioned islands, while on Albemarle and Tower it was seen
in the interior as well. Like the Galapagos Heron, it fre-
quented rocky and cliff-bound coasts, as well as those fringed
with mangroves. At Villamil, Albemarle Island, it was ob-
served about the large saline lagoons. On Tower Island, Sep-
tember 14 and 15, 1906, two or three were noted a quarter of a
1Cf. Bangs, Proc. New England Zool. Club, v. 3, pp. 99, 100; Oberholser, Proc.
U. S. N. M., v. 43, pp. 549, 550, 559.
60 CALIFORNIA ACADEMY OF SCIENCES [Proc. 4TH Ser.
mile inland among the rocks and bushes. On the east side of
Cowley Mountain, Albemarle Island, on August 10 and 11,
the tracks of these birds were noted in the dust of the donkey
trails at an altitude of about twenty-four hundred feet, and an
immature bird was seen. On August 30, at the village of
Santo Tomas, Albemarle Island, at an altitude of about
twelve hundred feet, a peon brought in an immature one which
he had caught early that morning. On other islands they
were often found in the brush a short distance from the beach,
but never up in the mountains, as on Albemarle. Like the
Galapagos Heron, this species proved a very easy one to
approach.
A male, taken on Duncan Island on December 2, and show-
ing traces of immaturity, had enlarged testes. Four adults
taken on June 25 on Hood Island had small sexual organs, as
had an adult male taken at Academy Bay, Indefatigable Island,
on July 16. The same remarks also apply to a specimen taken
in a cavern on Abingdon Island on September 22, 1906.
A nest of this species was found on March 10, on a point
thickly clothed with mangroves, which jutted into the large
lagoon beside the road leading inland from Villamil. The
nest was a bulky affair placed in a low flat bush about two and
a half feet above the ground. It was built of twigs and lined
with grass, and contained four pale greenish-blue eggs, nearly
ready to hatch. On March 15 another nest was found a short
distance from the beach about two miles west of Cape Rose,
Albemarle Island, and it contained two very small young.
On July 28, 1905, three Yellow-crowned Night Herons
were seen in the brush near Braithwaite Bay, Socorro, Revilla
Gigedo Islands, and one was secured. On Cocos Island,
Costa Rica, during the first half of September of the same
year, they were not infrequent, being seen in the trees and
along the fresh-water streams.
The material from Socorro and Cocos in the Academy’s col-
lection is very inadequate. An adult male from Socorro and
one from Cocos are both slightly paler than adults from the
Galapagos Islands. The measurements given in Table IX, p.
115, are all from adults, except those of Cocos specimens, in
which case an adult male and an immature male were meas-
ured. The two Cocos males have larger bills than the Gala-
Vou. II, Pr.I1] GIFFORD—BIRDS OF THE GALAPAGOS ISLANDS 61
pagos males, a difference which strikes the eye instantly when
looking over the series. The measurements of a female from
Camden County, Georgia, in the collection of Mr. Joseph
Grinnell, are included in the table.
In the Academy’s series are six Galapagos specimens in
juvenal plumage, and showing no signs of postjuvenal moult.
They are as follows: No. 2064, Seymour, November 22; No.
2063, Charles, February 26; No. 2065, Hood, June 25; No.
2066, Indefatigable, July 16; No. 2061, Albemarle, August
11; No. 2058, Albemarle, August 31. Of these six speci-
mens, three still have the remains of down attached to the
feathers of the crown; viz., Nos. 2064, 2065, and 2058. The
above series would seem to indicate that the breeding-season
for the species continues throughout the year.
No. 2062, Cocos Island, September 4, 1905, is beginning to
moult the juvenal plumage, pin-feathers appearing in the back
and about the head and neck. JI am unable to say whether the
moult is the postjuvenal or the prenuptial. No. 2054, Albe-
marle, March 5, is evidently undergoing a similar moult, which
likewise has not proceeded beyond the body-feathers, although
it has been pretty well completed on the head and neck. The
same remarks apply to No. 2060, Albemarle, March 5, and to
No. 2059, Albemarle, March 10.
Three specimens are in a striped immature plumage, which
evidently completely replaces the juvenal plumage, but wheth-
er by a postjuvenal or a prenuptial moult, I cannot say. In
this plumage, pale-brown occipital plumes and dusky scapular
plumes are present, and the black chin and throat of the adult
are faintly indicated. Our specimens were taken as follows:
No. 2057, Hood, September 29, 1905; No. 2056, Brattle, Oc-
tober 30; No. 2055, Indefatigable, November 20.
Birds with the black of the throat unbroken, but showing
immaturity otherwise, were not uncommon. ‘This immaturity
usually took the form of a generally duskier and more brown-
ish (rather than bluish) cast to the entire plumage, and also
of more or less streaked under parts. No. 2052, Hood, June
25, is evidently passing from the plumage last described into
this one. No. 2053, from Cocos Island, September 8, 1905,
has white feathers intermingled with the black ones of the
throat and chin.
62 CALIFORNIA ACADEMY OF SCIENCES [Proc. 47H Ser.
No. 2030, a fine adult male from Cocos Island, is in fresh
plumage and still shows numbers of pin-feathers. No. 2032
from Socorro, July 28, is in worn feather.
Butorides sundevalli: GALAPAGOS HERON
Plate II, Fig. 2
Abingdon, Albemarle, Barrington, Bindloe, Champion,
Charles, Chatham, Daphne, Delano, Duncan, Gardner-near-
Hood, Hood, Indefatigable, islet off northeast James, James,
Jervis, Narborough, Seymour, Tower, and Wenman islands.
This fearless, and to our minds ludicrous, heron frequented
the rocky and cliff-bound coasts as well as those clothed with
mangroves, its dusky color blending admirably with the lava
rocks and rendering it very difficult to see, especially when not
in motion. It was also observed quite commonly in the large
saline lagoons near Villamil, Albemarle Island.
In two or three instances individuals were observed sitting
on the bowsprit of the schooner while anchored at Tagus Cove,
Albemarle Island. One day at Charles Island, upon returning
from a short trip inland, we found an immature one in the
bottom of the skiff, which was drawn up on the beach. It was
quietly investigating the water under the grating. When we
threw our things into the boat, it jumped up on a thwart, where
it remained until one of the members of the party got a stick
and dispatched it.
When a stone is thrown close to one of these birds, or it is
come upon suddenly, it often jumps two or three feet toa
neighboring rock, raising its crest and cackling and squawking
in great alarm. Often if a person rows by one in a skiff at a dis-
tance of thirty or forty feet, it will make a great racket, craning
its neck absurdly all the while—a habit which affords much
amusement to the onlookers. When excited or disturbed,
these herons bob their tails up and down continually with a
short twitching motion.
Very often they were observed flying across bays and toward
adjacent islands. They do not fly with the neck outstretched,
but carry the head close to the shoulders, giving the body a
hunched appearance. The same is true of their walk. One
was watched carefully one day on Indefatigable Island. It
Vora Pratl GIFFORD—BIRDS OF THE GALAPAGOS ISLANDS 63
walked along, jumping from rock to rock and keeping hunched
up all the time. Upon sighting its prey, it advanced slowly
and stealthily, keeping behind rocks as much as possible until
within striking distance, when suddenly its head shot forth
and the fish was caught. On another day in the same locality
I watched for fully ten minutes one trying to swallow a crab,
and then had to leave without witnessing the conclusion.
The crustacean was held crosswise in the bird’s bill, and to
all appearances was too large to be swallowed. Nevertheless
the bird stood tenaciously in one spot, and made occasional
unsuccessful gulps.
Enlargement of the sexual organs was noted in adults taken
on Hood Island in September, on Indefatigable and Seymour
in November, on Chatham in February, and on Abingdon in
September. The sexual organs of two birds taken at Iguana
Cove, Albemarle Island, on March 17 were small.
The only occupied nest discovered was in a mangrove thicket
on a small islet at Sappho Cove, Chatham Island, February
10. It was about twenty-five feet from the outer edge of the
thicket, and perhaps four or five feet above high water. It
was composed of twigs, was not particularly bulky, and con-
tained three greenish eggs, pipped and ready to hatch. Both
of the adults were present and kept up a continual squawking
while the nest was being examined. One stayed on the nest,
except when approached very closely, when it would move
away two or three feet, darting its bill at us continually.
On Narborough on April 18, I killed, with a stone, a young
one which was just able to fly and fish for itself. Immedi-
ately its parent flew towards it screaming and with crest up-
raised. A similar instance was observed two or three days
before at Banks Bay, Albemarle Island.
The Academy’s series of adults exhibits a dichromatism.
Three adult males from Chatham Island are of the pale phase,
one (No. 2166 C. A. S.) extremely pale; a fourth male (No.
2137 C. A. S.) is rather intermediate, as is the only female
from that island. A male (No. 2167 C. A. S.) from Banks
Bay, and a female (No. 2168 C. A. S.) from Indefatigable,
closely resemble the Chatham males. Throughout the series
of adults there is considerable variation in color, most of the
birds inclining to the dark extreme. From the Academy’s
64 CALIFORNIA ACADEMY OF SCIENCES [Proc. 47H Ser.
series and from the remarks by Mr. Ridgway,’ it would appear
that the extreme pale phase of this species is known only from
Chatham, Indefatigable, and Albemarle Islands. In the ex-
treme pale examples, the under tail-coverts are white or very
pale gray with subterminal black spots, and there is a more or
less distinct grayish-white postocular streak. The pileum and
occipital crest are of the same color as in the dark phase, while
the throat is white instead of gray. In many of the specimens
of the dark phase the chin and throat have absolutely no white,
but are pale gray mottled with darker gray. Breeding indi-
viduals of the pale phase seen at Sappho Cove in February
had noticeably red tarsi and toes.
The series of young and immature birds shows considerable
variation also. In the majority of cases the ventral aspect is
dusky as described by Mr. Ridgway. Two specimens, how-
ever, from Cowley Bay, Albemarle Island, and from Nar-
borough respectively, are noticeably white below. Some speci-
mens have the terminal triangular white spot on the four outer-
most primaries as well as on the others. In very dusky ex-
amples the rusty shaft-streaks are lacking in the feathers of
the pileum and occipital crest. In some specimens the back
and scapulars are not of uniform deep sooty brown, but have
broad cinnamon-rufous mesial stripes, and the wing coverts
are similarly marked. No. 2144, Jervis, December 18, is an
excellent example. No. 2152, Indefatigable, July 23, has
narrow pale mesial stripes. No. 2148, Indefatigable, January
22, in which the juvenal plumage is not yet fully developed,
shows beautiful green reflections on the feathers of the upper
parts.
Two adults showing albinistic feathers were taken on In-
defatigable Island in latter November. One had a white
feather in the side of the neck, the other a white secondary.
No. 2119, adult male, from south Albemarle, has the tertia-
ries a dark shining green, like the end of the tail, for about one
quarter-inch at the distal end. This color is in the form of a
terminal band. <A similar terminal band, much interrupted,
is formed by this color on the tail.
The Academy’s series of skins of this species numbers 102.
Forty-five adult males show the dimensions, in millimeters,
1Proc. U. S. N. M., v. 19, p. 605.
Versi ibn 2) GIFFORD—BIRDS OF THE GALAPAGOS ISLANDS 65
of that sex to be: Wing 176-198 (186); tail 57-71 (63) ;
culmen 62-71 (67.3); tarsus 44.3-52.3 (48.6); middle toe
42.9-49 (45.6). Thirty-six females yield the following meas-
urements: Wing 169-192 (183); tail 56-70 (63.8); cul-
men 58.1-69.2 (65.4); tarsus 43.4-51.2 (47.4); middle toe
39.3-46.5 (44).
Table X, p. 116, giving measurements of specimens by
islands, shows that there is no variation in size with locality,
but that obviously all the variation in size is individual. It
cannot be correlated in any way with the color phases.
Birds in juvenal plumage showing no signs of moult were
taken during nine months of the year, and consequently prove
to a certain degree the wide range of the breeding-season of
this heron. They were taken as follows: November 25,
Indefatigable; December 18, Jervis; January 22, Indefati-
gable; March 24, Albemarle; April 18, Narborough; May 23,
Charles; June 28, Hood; July 14 and 23, Indefatigable; Sep-
tember 22, Abingdon.
Birds in juvenal plumage with the renewal taking place
chiefly in the scapular and interscapular regions were taken
as follows: September 27, 1905, Gardner-near-Hood; Octo-
ber 24, Barrington; November 8, Indefatigable; November
22, Seymour; January 5, James; July 16, Indefatigable;
August 11, Albemarle; September 22, 1906, Abingdon. No.
2163, Indefatigable, January 11, is somewhat farther along
than the above specimens, and has a good many new gray
feathers in the lower parts. No renewal seems to have yet
taken place on the wings, the feathers being those assumed
with the juvenal plumage.
A study of the Academy’s series of adults reveals the two
following points: The immature birds assume the adult
plumage at the first prenuptial moult, which evidently involves
the wings and tail as well as the body. The adults also have
a complete prenuptial moult.
Butorides virescens: GREEN HERON
The Green Heron was not an uncommon bird on Cocos
Island, Costa Rica, where a number were seen in the tall for-
est trees and along the streams in September, 1905.
August 8, 1913
66 CALIFORNIA ACADEMY OF SCIENCES [Proc. 47H SER.
The following table gives the measurements of seventeen
specimens in the Academy’s collection.
MEASUREMENTS (in millimeters)
Number | Sex Age Locality Wing | Tail |Culmen| Tarsus ace
18395 | o&@ | Adult Ohio 181 | 60 | 65.1 | 49. 44.2
13703 | o& | Adult California 195 | 66 | 60.8 | 49,9 46.6
13705 | o@ | Adult California 198 | 61 | 57 50.8 46.5
13704 | o& | Adult California 196 | 73 | 62.2 | 50.5 46.2
12959 | o& | Immature | California 201 | 68 | 61 Sie 45
12408 | co | Immature | California 193 | 66 | 56 50.9 45.6
2172 | o& | Immature | Cocos 172 | 60 | 61.8 | 46.9 42.8
2173 | o& | Immature | Cocos 180 | 63 | 59.8 | 49.4 42.5
2170 | & | Immature | Cocos 176 | 61 | 58.6 | 49.1 45.1
2169 | o& | Immature | Cocos D4 SOF ESS 49 45
13702 | 9 | Adult California 201 | 70 | 56.5 | 49 45
12411 | 9 | Immature | California 198 | 67 | 59.1 | 50.6 45.8
12409 | 2 | Immature | California 185 | 65 | 56 50.1 44
12410 | 9 | Immature | California 192)|\ 64) 52-5.) S127 46
12220 | 9 | Immature | California 192 | 67 | 56.3 | 49.3 44.6
2174 | 9 | Immature | Cocos 174 | 59 | 58.1 | 48.1 43.3
2171 | @ | Immature | Cocos 177° 1.6L | 56.3 | S025 47.8
The following summary of the above measurements shows
that Cocos specimens average decidedly smaller than Califor-
nia specimens in length of wing and of tail, closely approach-
ing the Ohio specimen in this regard. These averages are
made without regard to age.
SUMMARY OF MEASUREMENTS (in millimeters)
Locality Sex y eeotatas Wing Tail Culmen Tarsus Middle
Ohioweea- tele 1 181 60 65:1 49 44.2
California...] @ 5 197 67 59 50.8 46
Cocos aie. oO. 4 176 61 58.8 48.6 43.9
California...] 9 5 194 67 56.1 50.1 45.1
Gocoste ial ne 2 175 60 Shey? 49.3 455
Phcenicopterus ruber: AMERICAN FLAMINGO’
Plate III
‘Albemarle, Charles, Chatham, Indefatigable, James, and
Jervis islands.
1Cf. Chapman, “A Contribution to the Life History of the American Flamingo
(Phenicopterus ruber), with Remarks upon Specimens,” Bull. Am. Mus. Nat. Hist.,
v. 21, pp. 53-77.
Vor. IT, Pr. 1] GIFFORD—BIRDS OF THE GALAPAGOS ISLANDS 67
Flamingoes were not abundant. Albemarle, Charles, and
James seemed to be the most frequented islands, and about
thirty was the largest number of birds seen in one flock at one
time. On Indefatigable Island they were very scarce, only
two being taken; and likewise on Jervis, where a young one
was found in the small lagoon on the north side of the island.
On Chatham Island a dead one was found on the shore of the
tidal lagoon near the warehouse at Wreck Bay. This bird,
we were told, had been brought over alive from Charles
Island. The lagoon at the base of the precipitous mountain
known as Finger Point, near Sappho Cove, Chatham Island,
appeared to be a suitable one for flamingoes; but none were
found there.
The salty coastal lagoons seemed to be the sole haunts of
these birds. These lagoons are unaffected by the tides, and
are therefore saturated solutions of salts, their shores often
being paved with crystalline deposits. Their beds are usually
composed of reddish mud, sometimes quite hard and firm.
The shores, as a rule, are fringed with mangroves and salt-
loving bushes, which in many cases grow in almost impene-
trable thickets. Some of these lagoons are bounded by bare
lava.
With only one or two exceptions, it was not difficult to get
within shot-gun range of the flamingoes, and the discharge
of a gun usually caused them to fly only a short distance.
Where the ground is clear, and the bird’s movements are
unimpeded by rocks and bushes, the flamingo is a good runner,
being able to cover ground very rapidly, and giving a person
a lively chase. At James Bay, James Island, a young bird
not quite able to fly got through the bushes from the lagoon
to the ocean beach. I pursued it for nearly half a mile south
along the beach late one afternoon. I was, however, unable
to overtake it before it reached the rocks at the end of the
beach. Perceiving that it would be caught if it remained on
the beach, the bird stepped into the water and struck boldly
out from shore, swimming over an eighth of a mile. As soon
as I left the beach, it returned and commenced walking up
and down again in the attempt to find its way back to the
lagoon. The following morning it had disappeared.
68 CALIFORNIA ACADEMY OF SCIENCES [ Proc. 4TH Ser.
In the lagoons I have seen them walking both in long Indian
files, and, when disturbed, in compact bunches. Early one
morning we came upon a flock of twenty-eight in the lagoon at
Cormorant Bay, Charles Island. The placid surface of the
lagoon, overshadowed by a high and steep mountain on its
southeast side and surrounded by rocks and trees, together
with the beautiful roseate birds following one another in solemn
procession the whole length of the lagoon, made a very at-
tractive picture.
At a lagoon four or five miles northwest of Sullivan Bay,
James Island, on July 28, an adult bird was found without
flight feathers.1 New ones were just appearing, which were
very tender, bleeding profusely when bruised. This bird was
a fast runner, racing up and down the smooth beach of the
lagoon, until finally it was chased into a cul-de-sac. It tried
to escape through the brush, but of course tripped and fell,
bruising its wings, feet, and bill. It realized its inability to
fly, for it did not make any attempt to use its wings until the
very last. When carried under the arm it kept its head at a
level with mine, and did not try to strike with its heavy bill,
but simply looked at me wonderingly. This bird was taken
aboard the schooner, where it had great difficulty in standing,
owing to the rolling of the vessel. It managed to do so, how-
ever, by using its head and neck as a third leg. The same
thing was noted later with the young. The head and neck
are used in a like manner to assist a bird in steadying itself
when arising from a sitting posture.
As compared with the adults, the young walked clumsily.
In running in the shallow water as well as on the land, they
kept their wings outspread, flapping them at each step, appar-
ently balancing themselves by this means. I saw one stumble,
and one youngster, partially in the down, stepped in a hole
in the beach and broke one of its tarsi.
We first saw this species at Cormorant Bay, October 4,
when three or four flocks of about a dozen birds each flew by
the vessel, having been disturbed by some of the party who
had gone ashore. They seemed to be all neck and legs when
flying, as they carried those members stretched out hori-
zontally. Their wing beats were not rapid, but were moderate
1Cf. Beck. Condor. v. 4. p. 99; v. 6. p. 10; Bonhote, Ibis, 1903. p. 310; Chap-
man, Bull. Am. Mus. Nat. Hist., v. 21, p. 76.
Vor. II, Pr. I] GIFFORD—BIRDS OF THE GALAPAGOS ISLANDS 69
—being faster than those of the Great Blue Heron, but slower
than those of the Bahama Pintail. When forced to fly from
a lagoon, they usually circled about several times, apparently
very reluctant to leave, and often settling again instead of fly-
ing off. They were seldom, if ever, seen in flight except when
disturbed. Nevertheless they must move about considerably,
for the numbers in the respective lagoons varied at different
seasons, and in several instances varied overnight.
These birds were always observed feeding in the water,
often standing in it up to and even above the lower edge of
the feathered portion of the tibiae. In this position they feed
upon the bottom of the lagoon, affording a strange spectacle
with neither head nor legs in sight. Specimens were taken
with the gullet full of what appeared to be reddish mud.
Nests of this species were found on Charles and James
Islands, at Cormorant Bay on the former island and at James
Bay and near Sullivan Bay on the latter. The nests were
built of earth and mud scraped together into a pile with steep
sides, sometimes being as much as a foot in height and the
same in diameter across the top. Usually they were about
seven or eight inches high. The depressions in the tops were
about an inch or an inch and a half deep. The nests were al-
ways built near the water, either on some very low, flat, rocky
islet or on a beach. On the east side of the lagoon at James
Bay, there were thirty-five nests on the narrow beach at the
edge of the brush. Twenty-five were strung along close
together, and a few feet to the northward were ten more. When
we visited that locality in early August many of them showed
signs of recent use, to which the presence of the young birds
also testified. Some, however, had not been occupied that
year. About a dozen addled eggs were found, one to a nest,
while the remaining nests were vacant. On our previous visit
in December there were no eggs, so without a doubt these
were laid in 1906. Evidently at least a third of the eggs laid
in that locality during that year were infertile.
At Cormorant Bay, on February 25, we found six mounds
of earth between four and eight inches high, each with one
fresh egg. They were on a low lava-islet in the northeast cor-
ner of the large lagoon. No nests were found with lining
other than mud and earth. A seventh fresh egg was laid on
70 CALIFORNIA ACADEMY OF SCIENCES [Proc. 47TH Ser.
a level bit of lava rock, with mud half an inch deep scraped
around it. The birds all left when approached within thirty
yards.
In a lagoon about four miles northwest of Sullivan Bay, on
July 28, nine unoccupied nests were found, seven of which
were on a small, low, lava-islet, the remaining. two being on
the adjacent mainland. They were built in the usual style,
but were, however, only four or five inches high. An addled
egg was found in one. Undoubtedly the nests of the flamin-
goes in the Galapagos Islands are not endangered to any |
great extent by the rise of the water, as are the nests of their
Bahama relatives; hence, perhaps, many are built very low.
The following notes were made at James Bay in August:
August 6, there were twelve flamingoes in the lagoon, one
adult and eleven young, three of the latter being large enough
to fly. The remaining eight still showed more or less down.
Two or three dead young with nearly straight bills were
found. They were considerably younger than the ones taken.
Two full-grown young were feeding apart from the others.
They were approached quite closely and photographed, proving
less wary than the adults. August 7, an additional adult had
arrived during the night. One of the larger young birds was
observed to go through a strange performance; it seemed to
be butting an adult. They were all on the beach at the time.
The young one would lower its head and bump against the
adult with its shoulders; the latter paid very little attention,
merely trying to get out of the way. The performance was
kept up for about five minutes. Was the young bird begging
to be fed? I had seen it feeding itselfi—in fact they all seemed
to do so, the young apparently being left to themselves most
of the time, judging from the absence of the parents. August
8 revealed four adults in the lagoon. There were two lagoons
south of the one here mentioned, but they did not seem to be
used by the flamingoes for breeding purposes.
The chief associate of the flamingo was the Bahama Pin-
tail, while the Black-necked Stilt ranked second.
The colors of the naked parts in life were as follows:
Adult—Terminal third of bill black; remainder of mandible
whitish tinged with scarlet; remainder of maxilla, throat, and
skin in front of the eyes whitish; orbital ring buff; iris straw-
VorIl, Pr. 1] GIFFORD—BIRDS OF THE GALAPAGOS ISLANDS 71
yellow; tarsus and toes scarlet; under side of toes and webs
flesh-colored. Maxillee of very high-plumaged adults are
tinged with scarlet from the black of the anterior portion to
the posterior end of the nostrils.
Juvenal plumage—Iris dark brown; orbital ring olive-buft ;
bill olive-buff, tipped with plumbeous; skin in front of eyes
and throat cinereous; tarsus and toes olive-gray, blackish
slate at joints; under side of toes and webs mouse-gray. As
the birds age the tip of the bill becomes darker.
The Academy’s series of flamingo skins, all from the Gala-
pagos Islands, numbers seventy, and includes specimens taken
in every month of the year except March, April, and June.
The series of young birds is passing into the plumage called
by Mr. Chapman the “third or juvenal plumage.’* The
youngest bird matches No. 3 of Fig. 16 of Mr. Chapman’s
paper. As the grayish-brown down disappears from the tips
of the feathers of the under parts, the pale pink plumage is
more clearly disclosed, showing many of the feathers on the
breast and flanks with dark shafts. By lifting the feathers
of the under parts, the gray downy teleoptiles can be seen.
The youngest bird shows these very distinctly. With the next
moult these become paler, and in birds fully adult are white.
The feathers of the upper parts, particularly the scapulars and
interscapulars, show wear very quickly, for even in the young-
est bird they are somewhat abraded. Pale pink feathers put
in an appearance on the head, whence they seem to work
by degrees down the neck, appearing here and there and giy-
ing it a pink-and-gray mottled appearance. At this stage the
scapulars and interscapulars are much worn and pointed, and
the primaries are developed enough to enable the bird to fly.
All of the young thus far mentioned were taken at James Bay,
August 6 to 9, showing that there must be considerable varia-
tion in the time of egg-laying in a colony. No. 2236, James
Island, December 26, is in very much worn and faded juvenal
plumage, but shows no signs of moult.
Two specimens (No. 2234 from Jervis Island, December
18, 1905, and No. 2237 from James, December 28, 1905)
are moulting from the juvenal or third plumage into a fourth
plumage—not the full adult plumage, however, but a pink
1Bull. Am. Mus, Nat. Hist., v. 21, p. 72.
72 CALIFORNIA ACADEMY OF SCIENCES [Proc. 47H Ser.
plumage with dusky mesial stripes on many of the feathers of
the upper parts. These two specimens also show pink feath-
ers replacing the worn faded feathers of the head and neck,
and apparently working from the head downward. The
bases of the new feathers appearing in the head and neck are
gray as in the juvenal plumage, and not white as in fully
adult specimens. No. 2232, October 5, and No. 2238, Feb-
ruary 26, both from Charles Island, seem to show this fourth
plumage somewhat farther advanced. Scarlet upper wing-
coverts, occasionally with dark shafts, are appearing, and pink
feathers are replacing the worn, faded feathers of the under
parts. Pinkish-white feathers are also taking the places of
the long bicolored scapulars, and new upper tail-coverts are
appearing. No. 2238 shows the old and new upper wing-
coverts in alternating rows. No. 2208, south Albemarle, May
1, is still farther along, yet shows outward signs of imma-
turity in the wing-coverts, scapulars, tertials, upper tail-coverts,
tail, and the dark color of the naked parts. Many old worn
feathers of the third plumage are still to be found in the neck,
hidden beneath the new feathers, which, as mentioned above,
have dark bases. To sum up, the five immature birds just dis-
cussed are all in moult, apparently from the juvenal plumage
to a plumage superficially adult, but distinguished from the
full adult plumage by its paleness, by the dusky bases of the
feathers of the head and neck, by the dark shafts of the axil-
laries, and by the more or less frequent occurrence of dorsal
feathers with a dark mesial stripe or at least a shaft partially
dusky subterminally. For the sake of convenience this
plumage will be spoken of as the fourth plumage.
The following table gives the measurements in millimeters
of all the young and immature specimens, referred to in the
foregoing account, arranged according to age, as apparently
indicated by the plumage.
Vor. II, Pr. I] GIFFORD—BIRDS OF THE GALAPAGOS ISLANDS 3
MEASUREMENTS OF IMMATURE BIRDS (in millimeters)
vo
a Date Island Sex | Wing Tail |Culmen) Tarsus | o 3
g gy
a 3 os
2203 | Aug. 6, 1906 | James fof 145 93 139 | 71
2200 | Aug. 9, 1906 | James fou 203 95 142 | 72
2202 | Aug. 7, 1906 | James io) 241 49 99 154 | 69
2231 | Aug. 7, 1906 | James 2 244 37 99 153 | 68
2230 | Aug. 8, 1906 | James io) 261 50 102 145 | 70
2204 | Aug. 7, 1906 | James 9 322 69 113 157 | 70
2205 | Aug. 7, 1906 | James g 305 74 111 167073
2206!) Aug. 8, 1906 | James Q 367 106 118 190 | 86
2201 | Aug. 7, 1906 | James Q 340 99 115 L7iFeclvgaal
2233 | Aug. 6, 1906 | James 361 112 114 180 | 75
2235 | Aug. 7,1906 | James io) 348 95 119 183 | 76
2236 | Dec. 26, 1905 | James fou 361 111 115 187 | 77
2234 | Dec. 18, 1905 | Jervis fe) 359 114 113 202 | 73
2237 | Dec. 28, 1905 | James io) 368 112 118 190 | 80
2232 | Oct. 5,1905 | Charles 353 102 111 215 | 76
2238 | Feb. 26, 1906 | Charles 2 367 107 116°} 252°) 78
2208 | May 1, 1906 | Albemarle fot 408 123 127 295 | 90
Birds showing the fourth plumage, usually mixed with
either the third or the fifth, are common in the Academy’s
series, and have been included in the measurements of adults,
for to all outward appearances they are adult. Occasional
specimens in this plumage have dark edges to the rectrices,
but this was also noted in one full adult. I am not prepared
to say positively whether the primaries of this fourth pliimage
are those of the third, but apparently they are, as are also the
axillaries. Just how long a time elapses between the hatching
of the chick and the assumption of the adult plumage is hard
to say, as the birds evidently breed at different times of the
year on different islands, making it exceedingly difficult to
judge from a series of skins alone. However, I believe that
the full adult plumage is assumed at the first postnuptial moult.
Nineteen specimens in the Academy’s collection show the
fourth plumage in some stage. One October specimen from
Charles Island retains tertials of the third plumage, and has
worn feathers of that plumage hidden beneath the feathers of
the neck. Otherwise it is in worn fourth plumage, with new
feathers of the fifth plumage putting in an appearance in the
f 1No. 2206 has not lost the down from the tips of the feathers of the breast, yet
it is a larger bird than No. 2201, which has lost it,
74 CALIFORNIA ACADEMY OF SCIENCES [Proc. 47H Ser.
interscapular region and on the breast. The axillaries are
dark-shafted and worn, and are evidently retained from the
third plumage. Another October specimen from Charles
Island is in almost complete fresh fifth plumage, including
axillaries, but still shows a good many dark-based feathers in
the neck and worn feathers in the back. Four other Charles
Island specimens, taken in early October, are in transition
also; the two individuals just mentioned, however, give the
extremes. It would seem from the second individual, that
some specimens at least attain the full adult plumage in latter
October or November. Other transition birds, some showing
remains of the third plumage in the neck, were taken in Janu-
ary, February, May, and July. No. 2196, male, James Island,
July 28, is assuming the fifth or adult plumage—new abdomi-
nal feathers, axillaries, primaries, upper wing-coverts, and
rectrices are appearing, the primaries and rectrices not being
full grown. Elsewhere the moult is in progress. The new
axillaries have red instead of dusky shafts, a characteristic
of the adult bird. Evidently the first loss of the primaries
occurs during the moult from the fourth to the adult plumage.
One specimen, No. 2225, has an abnormal black feather at
the base of the neck; this feather belongs to the fourth
plumage. It would seem that the plumage which I call fourth
is either the postjuvenal or the first prenuptial, and is obtained
by a partial moult. The fifth plumage is evidently the first
postbreeding plumage.
Thirty specimens are fully adult. The feathers of the head
and neck have white bases, the axillaries have red instead of
black shafts, the body-down is white, and, in some February,
July, and August specimens, the lower mandible is tinged with
red just posterior to the black of the outer third. These thirty
specimens were taken in October, November, December, Janu-
ary, February, July, and August.
Three October specimens from Charles Island are worn,
and exhibit feather-growth in the head, neck, back, breast, and
abdomen.
No. 2187, Indefatigable Island, November 25, is in worn
faded plumage. New feathers, paler than normal, are appear-
ing in the head, neck, back, and lower parts.
Vor. II, Pr. I] GIFFORD—BIRDS OF THE GALAPAGOS ISLANDS 75
Of three specimens from James Island, taken in latter De-
cember, one is a female in fine fresh plumage save for a few
old scapulars and interscapulars, which are being replaced.
The other two specimens are worn birds in process of moult,
one being also much faded. The new feathers appearing in
this bird are abnormally pale.
This brings us to a fine male taken on southern Indefatigable
Island on January 11. This bird has pretty well renewed its
plumage, although the moult is still in process on the back and
in the tail. Both wings show the primary coverts being re-
newed, while in the right wing the two outer primaries are
lacking, and new ones are just appearing, still enveloped in
their sheaths. This is evidently not a normal state, and it
may have been brought on by an accident.
Fourteen adults were taken on Charles Island on February
26. These all show some wear in varying degree, but ap-
parently very little fading; for the color of the breast and
lower neck is much intensified in some by the wearing away
of the pale margins of the feathers, leaving them pointed in-
stead of rounded. Some specimens show remnants of the
previous plumage. One or two others show a few new feath-
ers appearing in the back and breast, either belated arrivals of
the present plumage or early heralds of the next plumage.
Seven specimens from James Island, taken in late July and
early August, show new feathers, and seem to be coming into
full fresh plumage (undoubtedly the postbreeding), although
they are by no means all at the same stage. Two are much
faded, and, as in other very pale specimens, the new feathers
appearing in the neck, breast, and back are paler than normal.
Both have worn red feathers at the base of the fore-neck,
among which new pale feathers are appearing in conformity
with other new pale feathers. One specimen also exhibits a
large amount of red on the lower mandible. The other speci-
men shows some new pinkish white feathers appearing among
the bright red ones of the abdomen. In pale specimens the
wings and tail seem to be normal in coloration, and four such
specimens show patches of worn red feathers on the lower
fore-neck. The pallor elsewhere is not that of immaturity,
for the birds are fully adult.
76 CALIFORNIA ACADEMY OF SCIENCES [Proc. 47H Ser.
One specimen, taken on south Albemarle on September 3,
is in about the same stage as some of the July and August birds
from James, in which the moult is well along.
From the evidence given above, it appears that in adults
the plumage is entirely renewed during the latter half of each
year after the breeding season,’ which occurs in the first half
of the year. E
The measurements (in millimeters) of twenty adult males
and twenty-three adult females yield the following extremes
and averages: Males—Wing 381-439 (413); tail 122-154
(139) ; culmen 117.4-132.3 (125.6) ; tarsus 253-322 (295);
middle toe 80-91.9 (86.4). Females—Wing 370-412 (384) ;
tail 120-143 (132); culmen 115-126 (119.5); tarsus 241-
306 (258) ; middle toe 73.9-89 (77.9).
Five fresh eggs from Charles Island measure in millimeters
as follows: 83.5X50.9, 87.3X52.4, 89.4X51.1, 85.8X52.6,
86.9X52.5. They all fall below the average given by Mr.
Chapman for ten eggs from the Bahama Islands—90.2X 53.9.?
Pecilonetta bahamensis: BAHAMA PINTAIL
Albemarle, Barrington, Charles, Chatham, Duncan, Hood,
Indefatigable, James, Jervis, and Seymour islands.
The Bahama Pintail was common on Albemarle, Charles,
Chatham, Indefatigable, James, and Seymour islands, as many
as one hundred being seen together on south Albemarle. Other
expeditions have reported them from Barrington, Duncan, and
Hood islands, localities in which they were not observed by
us. In the crater-lake at Tower Island, four ducks were ob-
served swimming about, but as I was on the rim of the crater
two or three hundred feet above them, they could not be posi-
tively identified.
The species was most common about the salt lagoons of the
low coastal regions, where it associated largely with the Ameri-
can Flamingo and the Black-necked Stilt, and, to a lesser de-
gree, with the Sooty Gull, the Blue-winged Teal, the Egret,
and the Galapagos Heron. It also frequented the fresh-water
Mr. G. M. Green of San Francisco reports having found the flamingoes breed-
ing in the salt marshes about James Bay on James Island, and he obtained eggs in
August.” (Snodgrass & Heller, Proc. Wash. Acad. Sci.. v. 5, pp. 253, 254.) It is
not stated whether the eggs were fresh. Those found by the Academy expedition at
James Bay in August, 1906, were addled.
2Bull. Am. Mus. Nat. Hist., v. 21, p. 61.
Vor. II, Pr. I] GIFFORD—BIRDS OF THE GALAPAGOS ISLANDS Ut
ponds and lakes in the elevated portions of some of the islands.
Only once were any seen on tidal water, and that was when a
pair alighted in a quiet cove about three miles west of Cape
Rose, Albemarle Island. Often they were noted sitting about
on small lava islets and rocks in the lagoons, standing on one
foot a good part of the time.
The haunts of these ducks must vary, as the smaller lagoons
and ponds often dry up. In November, thirteen were encoun-
tered in a lagoon on South Seymour, where during the follow-
ing July only the dry bed of the lagoon was to be seen. Some-
times one or two ducks would be seen in a locality, while at a
later or an earlier visit they were more abundant—all this go-
ing to show that they must move about from place to place.
In fact, on several occasions they were observed in flight along
the coasts, usually, however, only one or two at a time.
In a flock seen at South Seymour in November, males were
noted chasing each other, apparently in jealousy, and some-
times one would chase a female. Some low quacking is heard
during the mating season, and it was particularly noted at
Charles Island in February.
The following remarks on the reproductive organs tend to
show a long breeding-season:
October 5 and 6, Cormorant Bay, Charles Island. Two
males with swollen testes.
November 6, Academy Bay, Indefatigable Island. <A fe-
male with enlarged ovary.
January 11, south Indefatigable. Four skinned, all but one
having enlarged genital organs.
July 28, four miles northwest of Sullivan Bay, James Island.
Nine taken with large genital organs.
We never found what was beyond doubt the nest of this
species. At Cormorant Bay on February 25, a single fresh
egg was found on the bare rock of a low lava-islet in the large
lagoon at that place. Stilts and flamingoes were nesting on
the same islet.
Young in the down were observed only near Villamil,
Albemarle Island, in the salt lagoons about the cultivated low-
lands. On March 5 a parent bird was noted swimming with
three or four downy ducklings, and on the 6th several more
young were seen. Four days later a few were encountered in
78 CALIFORNIA ACADEMY OF SCIENCES (Proc. 47H Ser.
another lagoon accompanied by both parents. They kept well
to the center of the sheet of water when they perceived us,
traveling just as fast as their feet could propel them. Half a
dozen ducklings, accompanied by their mother, were discov-
ered in another pond about half a mile inland on August 24.
As she swam out from the mangroves, they tailed after her.
The above dates point to two broods being hatched during a
season, or else to a wide range of time in the breetling-season
in one locality.
For the most part these ducks were fearless, and usually
would swim towards a person, sometimes close enough to be
killed with a stone. After the first discharge of a gun, those
of a flock not killed or injured would sit on the water be-
wildered, thus giving: ample time to reload. Sometimes they
flew off a short distance and occasionally circled close to the
hunter. On Charles and Chatham islands they were somewhat
wary at times, perhaps because of persecution by the natives.
They were also cautious when in charge of their young. In
one case, when the parent observed me, it led the ducklings into
some thick grass, and then came out and swam back and forth
in an obvious effort to decoy me from them.
A drake, caught on Seymour Island in November, and kept
alive a couple of weeks in a cage, was accustomed to hiss at
me every time I approached, and he would also threaten to
bite.
In living specimens, the space on each side of the upper
mandible near its base is yellowish or orange in the female,
and reddish in the male, being brightest in the breeding-sea-
son. In the male, at least, some of the redness is perhaps
caused by blood, for when pressed the patch loses its red
color just as does one’s finger when squeezed. The reddish
color returns in a like manner when the pressure is removed.
In some males, notably No. 2287 C. A. S., the dusky
grayish-brown feathers of the upper-back are trisected by two
transverse bars of pale brown, the outer one distinct, the
inner one less so. In other males and all the females, these
feathers are dusky grayish-brown with paler margins, usually
without transverse bars, or with only the outer one faintly
indicated.
Vor. II, Pr. I] GIFFORD—BIRDS OF THE GALAPAGOS ISLANDS 79
In four specimens taken on south Albemarle on November
1, the postjuvenal or the first prenuptial moult is started. The
juvenal plumage is a very weak washed-out copy of the usual
plumage of the female.
Cases of partial albinism are not infrequent in this species.
The several examples in the Academy’s series show white
feathers among the colored ones at the base of the neck and
on the breast.
A number of specimens have a distinct rusty wash on the
tips of the feathers of the breast and abdomen.
The females average somewhat smaller than the males, as
shown by the following extremes and averages in millimeters,
which are condensed from the measurements of forty-five
males and thirty-five females, all from the Galapagos Islands:
Males—Wing 190-215 (203); tail 72-94 (83); culmen 40-
45 (43) ; tarsus 31.1-36 (33.1) ; middle toe 37.5—-43.9 (40.4).
Females—Wing 180-202 (192); tail 67-81 (72); culmen
37-43.4 (40.1); tarsus 29-33.7 (31.3); middle toe 36-40.5
@81):
The single egg of this species taken on Charles Island meas-
ures 5135.1 mm.
Querquedula versicolor: BrinLIANT TEAL
In a nominal list of the Galapagos birds brought home by
the Swedish Frigate “Eugenie,” Professor Carl J. Sundevall
includes “Anas maculirostris.”* The “Eugenie,” while on a
voyage round the world, visited the islands in May, 1852, with
Dr. Kinberg as zoologist and surgeon of the expedition.
There is apparently no other record of this species from the
Galapagos Islands.
Querquedula discors: BLUE-WINGED TEAL
Albemarle and Chatham islands.
The presence of the Blue-winged Teal in the Galapagos
Islands was first detected on February 8, 1906, by Mr. Beck,
who saw nine in the company of a flock of Bahama Pintails in
a pond above sixteen hundred feet elevation on Chatham.
TPs S.a) Leal Daves
80 CALIFORNIA ACADEMY OF SCIENCES [Proc. 47H Ser.
They were quite wild, and flew upon close approach, while
the native ducks remained.
Three were next seen by Mr. Hunter on March 6, as they
were flying about the large salt lagoon near Villamil, Albe-
marle Island. On August 22 a male and a female were seen
three or four times during the forenoon in that locality. They
were very wary, however, and always kept out of shot-gun
range. The next day a very long wing-shot brought down a
drake. A little later in the day half a dozen were found feeding
in a lagoon about half a mile from the sea, and a second bird
was shot, but lost in a mangrove thicket. The people at Villa-
mil readily distinguished this species from the Bahama Pintail,
and had a name for each. They said that the Blue-winged
Teal occurred there regularly every year.
The drake (No. 2336 C. A. S.) taken on August 23 was in
practically full plumage, including new primaries. The rec-
trices and many of the feathers of the abdomen, however,
were old and worn.
On August 10, 1905, a wing-tipped female Shoveller (Spa-
tula clypeata), No. 2337 C. A. S., was shot in the brackish
lagoon of Clipperton Island, Mexico. The specimen was in
moult, new feathers appearing in the breast, abdomen, crissum,
rump, and back. The primaries had not been moulted.
According to Mr. Beck, ducks occur in considerable num-
bers at Clipperton Island during the northern winter. He
visited the island on November 19, 1901. “Several hundred
ducks were seen, the majority being of the following species:
Dafila acuta (Pintail); Mareca Americana (Bald pate) ;
Querquedula discors (Blue-winged Teal); Spatula clypeata
(Shoveller) ; and a single Fuligula vallisneria (Canvasback ).”’
He also reports seeing two specimens of Fulica americana.
On Cocos Island, Costa Rica, on January 26, 1902, he shot
one Querquedula discors and saw two more.*
Nannopterum harrisi: FLIGHTLESS CORMORANT
Plate IV
Albemarle and Narborough islands.
With a more restricted range than any other water-bird in
the archipelago, the Flightless Cormorant frequents the coast
1Condor, v. 9, p. 110.
Vor. II, Pr. I] GIFFORD—BIRDS OF THE GALAPAGOS ISLANDS 81
of Narborough Island and the adjacent coast of western Albe-
marle. We saw it commonly about the east coast of the former
island, and at Banks Bay on the latter. At Tagus Cove two
were seen, one on April 7 and the other on April 19. We
never saw as many together at one time as we did of the
penguins at Iguana Cove, the limit being less than a dozen.
The extreme lack of wariness of these birds will probably
cause their total extinction when man more commonly fre-
quents this portion of the archipelago. Their small numbers
and their much restricted habitat would seem to indicate that
they are on the verge of extinction.
As the name denotes, these creatures are flightless; and we
never observed them attempt to fly even when hard pressed.
While sitting in their usual upright position, the wings are
often held half spread and away from the body, as shown in
plate 10, volume 9 of Novitates Zoologicae.
They are expert swimmers and divers. In diving, the bird
acts differently from the Galapagos Penguin; for instead of
merely submerging itself like a seal, it makes a sort of jump,
throwing its head and neck forward at the same time, dis-
appearing head first. One bird, when finally driven from its
nest, swam under water very swiftly for fifty feet or more.
When it comes to progression on land, however, they are
not so agile, their large bodies and short legs greatly impeding
their progress. On level ground they waddle, but where
rocks or other obstacles are in the way, they proceed by short
jumps, keeping in an upright position all the time. They
were seen to jump up on rocks six or seven inches high, but
sometimes had to make two or three trials before getting over
difficult places. Upon leaving the water they always stood
and shook themselves. It was not uncommon to see several
sitting upon some black lava-point or islet, usually near their
nests.
On land they were easy of approach, and one could usually
walk up to them and kill them with a stick. On the water
they were warier, but were usually approached within shot-
gun range. We observed none in the surf as reported by
other visitors, for the simple reason that there was no surf
at the time of our visits.
August 8, 1913
82 CALIFORNIA ACADEMY OF SCIENCES [Proc. 47H Ser.
Their weapon of defense is the bill, which they can use very
effectively. One bit a member of our party on the breast,
cutting through his shirt and drawing considerable blood. <A
number were carried alive in sacks from Narborough to Tagus
Cove. Holes were cut in the sacks, allowing their heads and
necks to protrude; each sack became a veritable Hydra. When
they were not biting each other in their rage, they were mak-
ing vicious passes at us with their long snake-like necks. At
the nest, both birds were usually loyal to each other, and put
up a good fight against the intruder. Once or twice the mate
of a bird at the nest was observed to come out of the water
and climb laboriously up to its nest, and, finding an enemy
there, valiantly help to defend it.
These cormorants were seen swallowing fish upon coming
to the surface after a dive. An eel fourteen inches long was
taken from the gullet of one bird.
In sleeping, they throw the body forward slightly from the
usual upright position, and place the head and neck over the
shoulder, thrusting the bill down the side of the body under
the secondaries. One of the most ridiculous sights I saw in
the Galapagos Islands was one of these clumsy creatures
scratching its head. Balancing itself on one foot, it care-
fully lowered its head so that it could reach it with its free
foot, and proceeded very solemnly to scratch for perhaps half
a minute.
When on a visit to southeastern Narborough on March 22, a
bird was observed pursuing another about a small tidal lagoon.
Perhaps this was a case, similar to that mentioned by Messrs.
Snodgrass and Heller,» of a young bird pursuing an adult
for food, although in this instance it was not successful.
They were heard to utter two or three harsh croaking notes.
On April 16th at Banks Bay, several were seen, and two
pairs were found with nests without eggs situated at an
elevation of about ten feet in a sandy place just back of
the black lava of the shore. There were three nests about
three feet apart, one an old one, and all placed close to a
small cactus. A fourth was seen some fifty yards away, also
in the sand. The nests with birds at hand were mere depres-
1Proc. Wash. Acad. Sci., v. 5, p. 250.
ee
Vor. II, Pr. I] GIFFORD—BIRDS OF THE GALAPAGOS ISLANDS 83
sions in the sand, lined around the edges with a few sticks and
seaweed, some of which was fresh. The owners held their
ground resolutely, opening their mouths at us menacingly and
uttering harsh guttural croaks. The voices of both males and
females seemed to be alike.
On northeastern Narborough on April 17, 18, and 19, two
colonies were found nesting—three pairs in one colony, and
four or five in the other. In the first colony, two sets of three
eggs each were taken; and in the second, one set of two. In
each set there were one or two fresh eggs, and one or two with
incubation begun. The nests were of sticks and seaweed,
mostly fresh, and were placed on the bare black lava about ten
feet above the water. In both instances the nesting-place
seemed also to be the haunt of sea iguanas. The nests were
five or six inches high at the rim, with a depression an inch
deep in the center.
Parasitic worms were found in the alimentary tracts of sev-
eral birds.
The colors of the naked parts of breeding adults were as
follows: Iris bluish green; feet black; lower mandible drab-
gray; upper mandible slate-color, drab-gray at tip; gular sac
drab-gray, with whitish dots; lores dusky with parallel longi-
tudinal ridges of pale dots.
All of the Academy’s skins, which were taken in March and
April, are in fresh body-plumage, and many—particularly
birds taken in March—show pin-feathers and newly expanded
feathers. The wings and tails of all are more or less worn,
and in almost every case new rectrices are appearing; new
remiges, however, are not so common. With one exception,
all of the specimens have filoplumes on the sides of the head,
and similar white filoplumes are to be found hidden among the
body feathers, particularly those of the under parts.
One specimen was found with a white feather in the tibia,
another with one in the back, and still another with two in
the back.
A dark-brown specimen, No. 2358, without filoplumes, was
taken on Narborough on March 22. The middle rectrices are
fresh, the others much worn. The wings are also worn, but
the body-plumage has been pretty well renewed. The old
feathers still remaining in the breast are very soft and downy.
84 CALIFORNIA ACADEMY OF SCIENCES [Proc. 47H Ser.
In fact the whole plumage of the under parts is softer than
that of adult birds.
MEASUREMENTS (in millimeters)
Number | Sex | Length Extent Wing Tail | Culmen | Tarsus | Outer Toe
2354 185 145 75 65 105
rofl
2355 rot 192 144 83 68 112
2356 rol 190 146 80 66 111
2357 fof 201 160 79 70 110
2358 fof 196 | 147 77 65 101
2360 fof 190 | 142 78 65 107
2364 ref 189 145 82 65 115
2365 fof 198 160 90 67 115
2368 rou 200 | 150 89 68 115
2369 rou 193 156 77 65 115
2373 fol 1000 840 192 140 80 68 110
2376 fof 197 147 83 65 104
2378 of 186 156 85 72 112
2359 co} 188 149 76 59 101
2361 i) 175 142 75 55 95
2362 io) 181 142 82 57 97
2363 2 176 | 145 73 56 97
2366 9 177 144 75 61 98
2367 9 176 | 145 73 58 102
2370 °) 180 139 75 60 101
2371 9 178 138 76 60 99
2374 9 830 730 178 140 69 57 97
2375 Q 187 147 80 65 103
2377 °) 176 147 76 57 97
2379 co} 182 145 77 60 103
2380 9 910 735 196 | 156 73 61 98
Average | o’ 193 149 81 67 110
Average | 9 181 145 75 59 99
The three sets of eggs taken by the Expedition measure in
millimeters as follows: 64X39, 6640.5, 69X41; 59.5X
40.5, 63X44, 6544; 69X42, 70X42.
Sula cyanops: BLUE-FACED Boony
The Blue-faced Booby is one of the common boobies of the
eastern tropical Pacific north of the Galapagos Islands. The
Academy's expedition first encountered it on July 23, 1905,
in latitude 20° 59’ North, longitude 111° 57’ West. The last
one noted on the southward voyage was seen on August 18 in
latitude 7° 24’ North, longitude 103° 52’ West. During a stiff
blow off Clipperton Island, Mexico, I noted an immature one
on the water exhausted.
= eee
Vor. 11, Pr.1] GIFFORD—BIRDS OF THE GALAPAGOS ISLANDS 85
At San Benedicto, Revilla Gigedo Islands, the species was
common and nesting on July 26, 1905, eggs and naked young
being seen. At Clipperton Island on August 10, there were
large colonies scattered about among the Brewster’s Boobies,
but none were nesting.
On the northward voyage the species was first noted on
September 29, 1906, in latitude 9° 22’ North, longitude 98° 25’
West, when half a dozen immature birds with brown heads
were seen singly during the day. Individuals of this species,
usually immature, were seen almost daily until October 25,
latitude 19° 53’ North, longitude 118° 1’ West.
Life-colors of naked parts of brown-headed immature birds
are: Bill olive-buff; gular sac and face dark plumbeous with
light spot under eye; feet cinereous with toes olive-buff on
under side.
Life-colors of naked parts of adults: Bill straw-yellow;
gular sac and face bluish black with light spot under eye; feet
lavender, toes edged with olive-buff.
In the following table are the measurements of thirteen
adults taken by the Expedition.
MEASUREMENTS (in millimeters)
Number] Sex Locality Wing} Tail | Culmen | Tarsus |Middle Toe
2381 | co | 10° 20’N., 108° 44’ W. | 423 106 54 77
2383 | o | Vicinity of Clipperton 170 99 52 73
2384 | o& | Vicinity of Clipperton 106 54 76
2385 | o | Vicinity of Clipperton 426 | 177 102 55 77
2387 | o | 10° 20’N., 109° W. 418 | 176 | 103 54 78
2388 | o& | Vicinity of Clipperton 176 100 51 73
2398 | o | Vicinity of Clipperton 414] 178 | 102 54 76
2382 | 9 | 10° 20’ N., 109° W. 428 | 176 100 54 75
2386 | 9 | 19°37’ N., 111° 11’ W. 440 | 181 100 57 79
2389 | 92 | Vicinity of Clipperton 180 104 53 80
2390 | Q | 13° 28’ N., 108° 52’ W. 173 103 54 77
2391 Q | 10° 20’ N., 108° 44’ W. 185 106 57 79
2392 | 92 | Vicinity of Clipperton 428 | 187 103 57 79
Sula piscatrix: RED-FOoTED Boosy
Plate V, Fig. 1
Abingdon, Bindloe, Culpepper, Gardner-near-Charles,
- Hood, Indefatigable, Tower, and Wenman islands.
86 CALIFORNIA ACADEMY OF SCIENCES [Proc. 47H Ser.
This booby, the boldest and most inquisitive of the five
species met with on the Expedition, was found commonly at
Culpepper, Tower, and Wenman islands. One example was
observed close to Gardner-near-Charles on October 3, 1905,
and one near South Abingdon on September 22, 1906. On
September 14, 1906, I noted two about twenty miles south of
Tower Island. None were encountered at Hood Island,
where Messrs. Snodgrass and Heller found them hesting in
May.* One in the dark phase was seen south of the archi-
pelago on June 15, in latitude 2° 17’ South, longitude 90° 58’
West. Most of the birds seen in the Galapagos Islands were
in the dark phase, although a number in the light phase were
noted at Culpepper, Tower, and Wenman islands—chiefly at
Culpepper. Birds in all sorts of pied or intermediate stages
were observed. At Cocos Island, Costa Rica, birds in the
light phase or in pied stages were very rare, even more so than
in the Galapagos Islands.
In 1905 the northernmost locality in which we saw the Red-
footed Booby was latitude 20° 59’ North, longitude 111° 57’
West, on July 23. This was in the general vicinity of San
Benedicto, Revilla Gigedo Islands, where the light phase of
the species occurs commonly. After leaving San Benedicto
the species was next met with in latitude 5° 43’ North, longi-
tude 98° 44’ West, on August 23, when a bird in the dark
phase was seen. Another was seen on the 24th, one on the
28th, and two on the 31st. On September Ist, when in the
vicinage of Cocos Island, they became common; all were in.
the dark phase.
In 1906, from the time we left Culpepper Island on Sep-
tember 25, until we were in latitude 19° North, longitude 116°
41’ West, on October 24, Red-footed Boobies were seen daily
with but two exceptions. The first individual in the light
phase was seen on October 7, in latitude 14° 38’ North, longi-
tude 109° 12’ West, after which they were seen with more or
less frequency, particularly in the vicinity of Clarion Island,
Revilla Gigedo group. Judging from the dull colors of the
naked parts, practically all of the birds of the dark phase seen’
after leaving the Galapagos group were immature. An occa-
sional immature bird with pale under parts was encountered.
1Proc. Wash. Acad. Sci., v. 5, p. 247.
—— Se
Vou. II, Pr. I] GIFFORD—BIRDS OF THE GALAPAGOS ISLANDS 87
At Tower, Wenman, and Culpepper islands, Red-footed
Boobies were sitting in the bushes and low trees both singly
and in pairs. In one or two cases a white adult was seen in
company with a gray adult. The nests were composed of
loose sticks placed in a bush or low tree. On Tower Island,
the nests were found all over the island, and two or three fresh
eggs were seen on September 15. Only an occasional bird,
however, was found on a nest. On Wenman Island, on Sep-
tember 24, the majority of the birds seemed to have no nests,
but were simply sitting about in the trees and bushes. No
eggs were discovered. A young bird just able to fly was taken
on Wenman, and one was seen on Tower.
Three females taken forty miles south of Cocos Island on
September 2, 1905, had large ovaries. At Cocos, the birds
were very common on the wing and in the trees growing along
the rocky precipitous shores. In the forest I noticed several
breaking off twigs for nests. On September 13 Mr. Beck
took a fresh egg from a nest in a small tree on a rocky island
occupied by a nesting colony of Brewster’s Boobies.
When a bird alighted at its nest or beside its mate, it craned
its neck and, swinging its head from side to side, uttered a
long, harsh, cackling call consisting of a short guttural note
repeated fifteen or twenty times in quick succession. This
call resembled somewhat the call given by the Man-o’-war Bird
when on the nest, only that it was harsher. At Cocos Island
the birds in the trees kept up a continual loud cackling noise.
When these boobies were asleep or pluming themselves in
some tree, a person could walk right up to them before being
noticed. They usually straightened up with a startled ex-
pression, often uttering a short squawk of surprise. If one
continued to disturb them they would squawk vociferously
and try to fly away, frequently floundering about among the
branches.
The flight of the Red-footed Booby is more graceful than
that of the Blue-faced and the Peruvian, and somewhat resem-
bles that of a large shearwater. When in the vicinity of Cocos
Island and of Clarion Island, flocks of Red-footed Boobies
were seen flying away from the islands in the morning and
towards them in the evening. The flocks contained from six
to fifteen birds. The birds fly with the same gentle, wave-like
88 CALIFORNIA ACADEMY OF SCIENCES [Proc. 47H Ser.
rise and fall that characterizes the flight of other members of
this genus. The wing-strokes occur on the rise; on the down-
ward swing the bird sails, in calm weather often going sev-
eral yards very close to the surface of the water. The mem-
bers of a flock are practically synchronous in every action.
In fishing, the Red-footed Booby pursues the same tactics as
the Blue-footed, diving, with wings half closed and rigid,
from a height of twenty or thirty feet. On one occasion, how-
ever, I saw one catching flying-fish on the wing by swooping
into schools which were skimming along above the water.
Over half of the Academy’s series of fifty-eight skins is
made up of adult birds. Some of these, in the dark phase,
show new dusky feathers replacing old, faded, dusky feathers.
In No. 2440 (male, dark phase, from Cocos), the bill has
dried of a bright-red color. This bird has the black gular sac
and is evidently adult. In most cases the bill dries mainly of
a dusky bluish black.
The colors of the naked parts of a freshly-killed adult dark-
phase bird were as follows: Bill pale blue, except at base,
where it was peach-blossom pink; skin around eyes azure blue;
gular sac black; feet poppy-red.
The colors of the naked parts of a freshly-killed brown-
plumaged immature bird were as follows: Bill brownish with
pinkish blotches near base; skin around eyes dark blue; gular
sac French-gray, blackish at posterior edge; feet dull pinkish
with dirty bluish shade in webs.
The colors of the naked parts of a freshly-killed immature
bird with pale under parts were as follows: Bill pale bluish
and pinkish with dark tip; skin around eyes blue; gular sac
pale blue with black along sides next the mandibular rami;
feet pinkish vinaceous.
The single egg taken at Cocos Island measures 58.7 mm. X
40.8 mm. It is dull chalky white in color.
Vor. II, Pr. I] GIFFORD—BIRDS OF THE GALAPAGOS ISLANDS 89
MEASUREMENTS OF ADULTS (in millimeters)
Number} Sex Locality Phase | Wing} Tail | Culmen| Tarsus | Middle Toe
2408 | co | Revilla Gigedo | Light} 413 | 224 | 86.7 | 35 63
2411 | o& | Revilla Gigedo | Light | 406 | 219 | 85.1 | 34.2 59
2429 | o | Cocos Dark |{ 404 | 232 | 88.8 | 33.1 61
2430 | o& | Cocos Dark | 395 | 205 | 87.1 | 33.1 61
2433 | o | Cocos Dark | 390 | 216 | 82.9 | 32 58
2434 | o& | Cocos Dark | 388 | 230 | 87.7 | 31.1 61
2448 | o | Cocos Dark | 398 | 218 | 90 33.4 60.6
2414 | o | Galapagos Pied | 381 | 192 | 87.9 | 31.4 57
2415 | & | Galapagos Pied | 414 | 230 | 91.7 | 33 62.6
2416 | o& | Galapagos Pied | 404 | 207 | 91 37.1 61
2432 | o | Galapagos Dark | 422 | 217 | 88 36 64
2437 | & | Galapagos Dark | 395 | 214 | 87.8 | 35.1 63.5
2441 | o | Galapagos Dark | 395 | 217 | 88.3 | 34.1 61.8
2445 | o | Galapagos Dark | 399 | 191 | 89 33.3 60.5
2449 | & | Galapagos Dark | 390 | 214 | 84.4 | 32 58
2409 | 9 | Revilla Gigedo | Light | 411 | 213 | 90.2 | 35 65.6
2410 | 92 | Revilla Gigedo | Light | 385 | 216 | 90 SQ) 61
2422 | 9 | Cocos Dark | 411 | 212 | 91.3 | 37 65.1
2425 | 9 | Cocos Dark | 395 | 215 | 82.5 | 32.3 60.7
2428 | 9 | Cocos Dark | 412 | 214 | 87.4 | 35 63.1
2431 | 9 | Cocos Dark | 418 | 223 | 94.2 | 35 61
2438 | 9 | Cocos Dark | 391 | 214 | 87.3 | 34 61.4
2420 | @ | Galapagos Pied | 390 | 195 | 88.7 | 35 59.6
2421 | 9 | Galapagos Dark | 419 | 212 | 92 33 60
2423 | 9 | Galapagos Pied | 399 | 212 | 84 SBiedd 60.8
2426 | 9 | Galapagos Dark | 402 | 212 | 84.5 | 32 57.8
2427 | 9 | Galapagos Pied | 412 | 198 | 90.5 | 38.9 63.1
2435 | 9 | Galapagos Dark | 410 | 215 | 92.7 | 33 60
2436 | 9 | Galapagos Dark | 397 | 205 | 93.1 | 34.4 61.9
2439 | 9 | Galapagos Dark | 408 | 211 | 86 31.9 60.9
2443 | 9 | Galapagos Dark | 385 | 199 | 86.5 | 32.7 62
Sula variegata: PERUVIAN BoosBy
Abingdon, Albemarle, Barrington, Bindloe, Brattle, Cham-
pion, Charles, Chatham, Cowley, Crossman, Culpepper,
Daphne, Duncan, Enderby, Gardner-near-Charles, Gardner-
near-Hood, Hood, Indefatigable, islet off northeast James.
James, Nameless, Narborough, Seymour, Tower, and Wen-
man islands.
This booby was found pretty commonly throughout the
archipelago, and chiefly about the islands on which it bred.
It frequented the open sea rather than the sheltered bays,
differing in this respect from the Blue-footed Booby. The
farthest south we saw it was latitude 3° 39’ South, longitude
93° 1’ West. Off the coast of Colombia and Ecuador, we
90 CALIFORNIA ACADEMY OF SCIENCES [Proc. 47H Ser.
saw on two occasions a large white booby, which we took to
be this species. The day after leaving Culpepper Island, Sep-
tember 26, 1906, we saw one in latitude 3° 29’ North, longi-
tude 93° 6 West; while on October 13, 1906, a nearly adult
bird was taken in latitude 15° 36’ North, longitude 110° 12’
West. Mr. Beck records two at Clipperton Island, Mexico,
and two at Cocos Island, Costa Rica.*
The breeding-places and breeding-dates for this species in
the Galapagos Islands, so far as known are as follows: Cul-
pepper in July and December; Daphne in November ; Enderby
in May; Gardner-near-Charles in October; Hood in February,
May, and October; \WWenman in February and December.
The nest was a mere depression in the soil, usually sur-
rounded with pebbles and bits of rock, and invariably situated
close to the sea, often on the edge of some precipice or on a
ledge of a cliff. A sitting bird was frequently seen picking up
bits of rock with its bill and placing them around the nest.
When both male and female were at a nest they had the
habit of touching bills.
Whenever a bird was driven from a nest, it left with great
reluctance, and usually returned in a minute or two with much
squawking, and fondly covered its charge. When the mate
arrived to relieve the nest bird, there was also a great deal of
squawking. One day I was sitting in front of a nest when
the second owner arrived. The nest bird immediately drew
its attention to me, and apparently tried to induce it to join in
an attack on me.
The first place in which we encountered Peruvian Boobies
breeding, was the larger Daphne Island, where they were
nesting on the steep seaward slopes and on the rim of the
crater, but not within the crater itself, which was occupied by
Blue-footed Boobies. On November 23 some had eggs, and
others had young.
They were nesting abundantly on Hood Island in early
February. On February lst some birds were seen with fresh
eggs, some with one egg and one young, others with two very
young ones, and others still with one young one only. All of
the young were either naked or in the down. The adults seem,
however, to rear only one young one, for I have never seen
1Condor, v. 9, p. 110.
Vor. II, Pr. I] GIFFORD—BIRDS OF THE GALAPAGOS ISLANDS 91
more than one in a nest when they approach the feathered
stage. The great difference in size between the two nestlings
in the same nest is particularly noticeable as their age increases ;
one is small and puny, the other robust and strong. When we
visited Hood Island again in latter June, there were a number
of young about, which still had some down on them.
A young bird in down was taken on Enderby on May 14.
Its bill and feet were olive-gray.
On one occasion Mr. Beck saw an adult Peruvian Booby
taking care of a downy Man-o’-war Bird in a nest of the
latter species.
Unless continually persecuted, these boobies exhibit practi-
cally no fear of man. The young particularly show consid-
erable curiosity. Just south of Hood Island, on June 23, we
encountered large numbers of them, many of which kept
alighting within two or three feet of the schooner. Fifty or
sixty were seen on the water intermingled with as many Dusky
Shearwaters.
On Hood Island, Peruvian Boobies were to be seen sprinkled
about among the Man-o’-war Birds, Blue-footed Boobies, and
Galapagos Albatrosses, which had nesting-sites close to the
cliffs. When asleep at the nest, these boobies thrust the bill
down the middle of the back under the feathers.
Apparently the boobies are bothered somewhat by the Gala-
pagos Hawks, for I noticed an adult booby, with a young one
in the nest, show considerable alarm when a hawk alighted on
a rock close by. In defence against human intruders, the
boobies use their bills with telling effect.
During March, when on the south coast of Albemarle
Island, Peruvian Boobies were noted each evening flying to-
ward Brattle Island. The flight was not particularly swift or
graceful. Several slow wing-beats were succeeded by a long
sail. Single birds usually flew somewhat higher than the
flocks. When three or four were together they kept time in
all their movements, usually following a leader, sometimes one
behind another, sometimes bunched. One was observed fol-
lowing a Blue-footed Booby in a similar manner. At sea
they not infrequently circled about the vessel. On land they
waddle, usually with the tail scraping the ground.
92 CALIFORNIA ACADEMY OF SCIENCES [Proc. 47H Ser.
I have never seen the adults dive, but I once saw an imma-
ture bird do so. It shot obliquely into the water from a dis-
tance of only a few feet, entering at a very small angle and
making a semicircle while in the water. It came up facing
in the direction just opposite to that in which it entered. One
day I saw one sitting on the water with head immersed for a
long time, and apparently looking for food. Fish seem to con-
stitute their chief diet. Once I saw a Peruvian Booby at-
tack a wounded Blue-footed Booby and force it to disgorge.
On another occasion I saw one catch a flying-fish by skim-
ming close over the water after it.
The colors of the naked parts of the adults in life were as
follows: Bill vinaceous-pink, shading into ochre-yellow at tip
and along tomia; gular sac slate-gray; iris gamboge-yellow;
feet dark olive-buff.
An immature bird shot at Cormorant Bay, Charles Island,
on May 17, had an olive-buff bill; the gular sac and feet were
of about the same color as those of adults. Gular sacs of
young in down were flesh-colored. In fully fledged young
they were dark blue or blackish blue.
Although the Academy’s series of skins of this species num-
bers sixty-nine, and is well supplied with birds both in juvenal
plumage and in adult plumage, specimens are lacking to show
the complete transition from juvenal to adult. One speci-
men, No. 2478, taken on October 12, 1906, in latitude 15° 40’
North, longitude 110° 12’ West, is apparently just completing
the assumption of the adult plumage, for a number of partially
dusky feathers are still to be seen in the upper parts.
An examination of the adult males in the collection revealed
birds with new outer primaries appearing, as follows: From
Hood Island in June and October; from Culpepper in Septem-
ber. Only one female (No. 2510) was found in a like condi-
tion—an individual taken on Hood on October 2. In most
cases the males seemed to be somewhat in advance of the
females in the progress of the moult.
In-conjunction with the measurements of twenty-three adult
males and twenty-five adult females, there are given for the
sake of comparison, in Table XI, p. 117, the measurements of
seven adult males and six adult females of Sula cyanops. The
average Sula variegata has a decidedly longer wing, and has
Vor. II, Pr. 1] GIFFORD—BIRDS OF THE GALAPAGOS ISLANDS 93
a relatively shorter tarsus in comparison with the middle toe,
than has the average Sula cyanops. Males seem to average
decidedly smaller than females in most respects.
Fifteen eggs of the Peruvian Booby, taken by Mr. Beck
on Hood Island on February 4, yield the following maximum,
minimum, and average measurements in millimeters: Length
55-68.4 (63.5) ; breadth 38.6-49.5 (44.8). These fifteen eggs
comprise eleven sets, four of two eggs each and seven of one
each. The sets of two eggs each measure as follows: 61.6
44.5, 62.5X46; 65.5X45.6, 55X38.6; 62.8X46, 6546.6;
62.6 45.8, 61.7 44.7. On several of the data-sheets Mr. Beck
states that the nest had been occupied four months before by
Neboux’s Booby (Sula nebouxt).
In addition to eggs of Sula variegata from Hood Island,
Mr. Oates has referred a number of eggs of Sula cyanops
from San Benedicto and Clarion, Revilla Gigedo Islands, to
this species.*
Sula nebouxi: BLUE-FOOTED BooBy
Plate V, Fig. 2
Abingdon, Albemarle, Barrington, Bindloe, Brattle, Cham-
pion, Charles, Chatham, Cowley, Crossman, Daphne, Duncan,
Enderby, Gardner-near-Charles, Gardner-near-Hood, Hood,
Indefatigable, islet off northeast James, James, Jervis, Kicker,
Narborough, Onslow, Seymour, Tower, and Wenman islands.
The Blue-footed Booby was by far the commonest and most
generally distributed of the three species occurring in Gala-
pagos waters. Like the Dusky Shearwater, the Graceful
Petrel, and the Sooty Gull, it seemed to prefer to be in close
proximity to the land, rather than to haunt the open ocean as
do the Red-footed and the Peruvian Boobies. Except for a
single specimen taken at the San Benito Islands, Baja Califor-
nia, on July 15, 1905, we saw no Blue-footed Boobies outside
of the archipelago.
When not fishing, the Blue-footed Boobies frequently con-
gregated on the low black lava-points which jut into the sea,
the assemblages varying from two or three to thirty or forty,
Single birds and pairs are often seen standing on the ledges
1Cat. Coll. Birds’ Eggs Brit. Mus., v. 2, p. 211.
94 CALIFORNIA ACADEMY OF SCIENCES [Proc. 4TH SER.
and on the tops of sea-cliffs. On south James they were seen
in the mangroves. It was not unusual to find them asleep in
broad daylight. An entire flock, however, was never caught
napping, two or three birds always being awake and on the
lookout.
When offshore and on a journey, the Blue-footed Boobies
frequently flew in single file, all following the undulations of
the leader. On the south coast of Albemarle Island>in May,
they were noted flying towards Brattle Island each evening.
Single birds met with offshore usually circled about the
schooner. The birds noted about the bays and coves had the
habit of continually looking downward when flying, appar-
ently in search of fish.
The fish were almost invariably caught by diving, although
an occasional flying-fish was chased and caught while in the
air. It was a common thing to see Blue-footed Boobies fish-
ing in flocks, often all diving simultaneously. They dive with
wings half-closed and neck rigid and straight, striking the
water with great force. As all would not get fish when div-
ing in a flock, there was usually considerable squabbling over
captures. One day a booby was seen to enter the water
obliquely at a very small angle, appearing quickly on the sur-
face again and continuing its line of flight without a pause.
At Finger Point, Chatham Island, in the middle of Febru-
ary, there were several Blue-footed Boobies standing about in
the vicinity of some old nests three or four hundred feet above
the ocean. Whenever a bird alighted, there was a great deal
of squawking and bowing and waddling carried on by it and
its mate. In latter March during the mating-season at Tagus
Cove, Albemarle Island, they were quite demonstrative, the
mated birds seeming to talk to each other, and managing to
keep up an incessant racket. One of them as a rule did con-
siderable strutting about, lifting its feet very high with each
step, and appearing to us very ridiculous. They made a very
elaborate bow, uttering one or two short notes at the same
time. With the breast almost touching the ground, the neck
stretched upwards, and the wings outspread but held verti-
cally, the ceremony of bowing would last for about half a
minute.*
1Cf. Beck, Condor, v. 6, pp. 6-8.
Vor. II, Pr. I] GIFFORD—BIRDS OF THE GALAPAGOS ISLANDS 95
The nest of this species was like that of the Peruvian Booby,
a mere depression in the earth in which two eggs were laid.
On Hood and Champion Islands Blue-footed Boobies nested
in the vicinity of the shore, sometimes along the tops of cliffs,
at other times close to the water. The birds at Hood Island
in September, 1905, were nesting beside white glazed rocks
and in the broiling sun, with no shelter whatsoever. Many
of them were sitting on their nests with mouth open, panting
with heat and thirst. On Daphne they nested on the sandy
floor of the crater, which is three or four hundred feet deep
and very hot, as it is protected on all sides from the wind.
Only one pair was seen nesting outside the crater. At Tagus
Cove they nested on the broad ledges and tops of the low
tufaceous cliffs.
The following notes on the time and place of breeding of
the Blue-footed Booby, taken in conjunction with the observa-
tions of other expeditions, point to an almost continuous
breeding-season. We found eggs, young in the down, and
fully fledged young at Hood Island, in September and Octo-
ber; both naked young and young assuming juvenal plumage
at Hood in February; eggs, birds in down, and well-feathered
young at Champion in October; young in the down at Cham-
pion in February; naked young at Brattle in October; eggs
and downy young at Daphne in November; large young of
various ages at Daphne in July; fresh eggs at Tagus Cove
in March; and one large young one at Tower in September.
There are two young hatched; but by the time they reach the
partially-feathered state, seldom more than one has survived.
The half-fledged young exhibited considerable pugnacity.
When one was shoved into a neighbor’s domain, a fight en-
sued, the birds seizing each other by the beak and then having
a tug-of-war for perhaps a minute.
An adult taken at Academy Bay, Indefatigable, had its
right foot deformed. At the junction of the toes with the
tarsus the foot was enlarged and immovable, the toes were
bent under and altogether rigid, and one claw was much
elongated.
Breeding adults taken at Tagus Cove had the following
life-colors: Feet pale blue; bill plumbeous; gular sac china-
blue.
96 CALIFORNIA ACADEMY OF SCIENCES [ Proc. 4TH Ser.
The juvenal plumage of Sula nebouxi at first glance resem-
bles somewhat that of Sula variegata, but is readily distin-
guished from it by the narrow feathers of the neck, as well as
by the pale brown of the upper breast. The specimen men-
tioned by Messrs. Rothschild and Hartert in their first Gala-
pagos paper as “probably not in the first plumage, but in a
transitional one,’ is evidently a bird in juvenal (‘‘first’’)
plumage. In the Academy’s series there are a ntmber of
specimens passing from the down into this plumage.
In their second paper these gentlemen seem to have been
more seriously misled, for the description they give for the
“first” (juvenal) plumage of Sula nebouxi fits the young of
Sula variegata and not the young of Sula nebouxi. “These
birds in the first plumage differ from the adult ones in having
the feathers of the head and neck (which in adult birds are
narrow and pointed, giving these parts a streaked white-and-
brown appearance) shorter, soft, wide and rounded, and of a
uniform deep smoke-brown colour, so that the neck is in a
striking contrast to the white breast and abdomen.”? Every
point here given fits Sula variegata rather than Sula nebouxi.
The young of Sula nebouxi have the upper breast pale brown
and “the whole neck smoky brown, with paler tips to the
feathers,”* which are long and narrow. There is not the
striking contrast between the neck and the upper breast as in
Sula variegata.
Again, in their second paper, Messrs. Rothschild and Har-
tert state that in the “first” plumage of Sula nebouxi “the
white interscapular saddle, which is so conspicuous in adult
S. nebouxi, is not developed.” In every one of a series of
thirteen Academy specimens—some partly in the down, others
in full juvenal plumage—the white interscapular saddle is
more or less conspicuous, being even more noticeable than in
adults on account of the sharper contrast of colors. The
young of Sula variegata lack this saddle.
In the Academy’s series of adults, three have the outer
primaries in a pulpy state basally: No. 2543, a male taken
at Duncan Island on December 9; No. 2570, a female taken at
Duncan on December 14; No. 2579, a female taken at In-
INov. Zool., v. 6,
*Tbid., v. 9, p. 407
32bid., v. 6, pp. 178, 179.
p. 178, 179.
Vor. II, Pr. I] GIFFORD—BIRDS OF THE GALAPAGOS ISLANDS 97
defatigable on July 18. Inasmuch as the breeding-season
extends practically throughout the year, the various plumages
do likewise.
The measurements given below of twenty adult males and
twenty-seven adult females reveal the fact that on the average
the female is somewhat superior to the male in size. The
measurements of length of tail are not very dependable, for
the central tail-feathers in this species are very long and hence
suffer much from wear. The maximum, minimum, and aver-
age dimensions in millimeters are: Males—Wing 412-460
(433) ; tail 200-239 (222); culmen 101-118 (108); tarsus
47-55 (50) ; middle toe 64.9-78 (70). Females—Wing 428-
465 (447) ; tail 207-250 (227); culmen 110.6-121 (115.4);
tarsus 51-57 (53.7); middle toe 69.4-81 (74.2).
The eggs of Sula nebouxi, like those of other boobies, have
a very pale bluish ground-color over which there is a chalky-
white coating. One specimen lacks this coating, and is a pale
blue all over. The other egg in the same clutch has the
coating.
Seventeen eggs (ten of them composing five sets of two
each, the remaining seven composing seven sets) collected by
Mr. Beck from a colony on southeast Hood on September 28,
1905, yield the following minimum, maximum, and aver-
age dimensions in millimeters: Length 57.6-67.7 (62.3) ;
breadth 40.2-45.4 (43.1). The eggs comprising the sets of
two each measured by sets: 64.5X41.1, 6342.9; 61.4 43.6,
63.5X44.5; 63.5X43.5, 61.6X42.6; 57.642, 59X40.2;
61.9X 43.6, 6143.9.
Sula brewsteri: BREWSTER’S Boosy
It is not unlikely that the birds reported from the Galapa-
gos Archipelago as Brewster’s Boobies were either the young
of the Peruvian Booby or the young of the Blue-footed Booby.
The three centers of abundance of Brewster’s Booby visited
by the Galapagos Expedition were San Benedicto, Revilla
Gigedo Islands, on July 26; Clipperton Island, Mexico, on
August 10; and Cocos Island, Costa Rica, September 3-13,
1905.
We first encountered Brewster’s Boobies on July 24, lati-
tude 19° 40’ North, longitude 112° West. They were com-
August 8, 1913
98 CALIFORNIA ACADEMY OF SCIENCES [Proc. 47H SER.
mon, especially toward evening, when they passed in flocks
of ten or more. One came aboard the schooner after dark
and was captured. At San Benedicto they were fairly com-
mon. Two nests were found; on one a male was brooding a
young bird; on the other a female was brooding two eggs.
A number of Brewster's Boobies were observed daily on the
voyage from San Benedicto to Clipperton Island. There ap-
peared to be no decrease in numbers to indicate where the
birds from one colony ended and those from the other began.
In the vicinity of Clipperton Island they were observed in
mixed flocks of birds, consisting of such species as the Dark-
rumped Petrel, Wedge-tailed Shearwater (Puffinus chloro-
rhynchus), Noddy, Clipperton Noddy, Blue-faced Booby, and
Sooty Tern. On a squally day I noted an adult male dead
on the water, evidently struck down by a wave.
At Clipperton Island Brewster’s Boobies were nesting
abundantly all around the island, here and there interspersed
with colonies of Blue-faced Boobies, which, however, were
not nesting. Of the Brewster’s Boobies, some had eggs and
others naked young. ‘The nests were mere depressions lined
with wing-quills.
The first birds of the Cocos Island colony were seen on
September Ist, when some thirty or forty miles south of that
island. On the 2nd they were fairly common; in the morning
they were noted flying away from the island, and in the
evening towards it. In this region their headquarters were on
a small island offshore, situated between the small outlying
islands of Nuez and Cascara. Only two or three individuals
were observed on the main island. On September 13 we
found them nesting abundantly, little hollows in the soil
amongst the rocks and grass on the steep slopes of the island
being utilized for nesting-sites. Naked and downy young
and eggs, sometimes one, sometimes two, were found.
On the voyage home from the Galapagos Islands in 1906,
from one to three birds were seen on October 4, 5, 7, 8, 10, and
13. On October 4 the “Academy” was in latitude 14° 24’ North,
longitude 107° 5’ West; on October 13 in latitude 15° 36’
North, longitude 110° 12’ West. One bird taken had a num-
ber of ticks attached to its gular sac.
"
Vou. II, Pr.1] | GIFFORD—BIRDS OF THE GALAPAGOS ISLANDS 99
Adult Clipperton birds had the following colors of the
naked parts in life: Males—Bill glaucous blue; gular sac
indigo-blue; feet pea-green; iris silvery gray, distinct on the
outer edge, but nearly obscured by black on the inner edge.
Females—Bill olive-buff; gular sac indigo-blue, washed with
pea-green ; feet pea-green.
Although the Academy’s series of Revilla Gigedo birds is
very small, what few there are seem to be intermediate in
color between the Cocos and the Clipperton birds, leaning
distinctly toward the latter.
None of the Academy’s series are moulting the primaries.
Clipperton birds, however, have their primaries and_ tails
extremely abraded in many cases; in fact, among the females
it was impossible to obtain measurements of the length of tail,
as it was broken off in every case. Clipperton birds probably
renew their plumage by a postnuptial moult about September
and October.
In the vicinity of San Benedicto and of Clipperton, we cap-
tured a number of birds which were passing from a brown
immature plumage into the adult plumage. Two small white
downy young from Cocos show the tip of the upper mandible
to be more abruptly decurved in birds of that age than in
adults.
_ The measurements in Table XII, p. 117, show that Clipper-
ton birds average slightly larger than Cocos birds.
A series of twenty-four eggs from Cocos Island are all
stained a dirty brown, evidently on account of the dampness
of the nests, which is incidental to the rains which deluge the
island daily. Sixteen of these eggs compose sets of two each,
while the remaining eight compose sets of one each. The
extreme and average measurements, in millimeters, for the
whole series are as follows: Length 50.3-63.1 (58.7);
breadth 37.5-42.5 (39.8).
The measurements of the eight sets of two eggs each show
that there is some variation in size in the eggs of each set.
By sets these eggs measure as follows: 53.640, 54.540;
63X41.6, 58.9X39.5; 58.340, 55.5 38.2; 62.5X39, 59.7X
37.5; 62X39.9, 60X39.6; 6040.2, 58.5X39.5; 63.1X42.5,
60.142; 62.2X40.7, 62.539. From the above it is plainly
seen that there is considerable variation in the ratio of length
100 CALIFORNIA ACADEMY OF SCIENCES [Proc. 47H Ser.
to breadth, or in other words, that the eggs vary considerably
in shape. The extreme forms are ovate and elliptical-ovate.
Fregata aquila: MAN-o’-war Brirp
Plates VI and VII
Abingdon, Albemarle, Barrington, Bindloe, Brattle, Cham-
pion, Charles, Chatham, Culpepper, Daphne, Duncan,
Enderby, Gardner-near-Charles, Gardner-near-Hood, Hood,
Indefatigable, James, Jervis, Kicker, Narborough, Onslow,
Seymour, Tower, and Wenman islands.
The Man-o’-war Bird is present at all times about the coasts
and waters of the Galapagos Islands, often being seen flying
over the land as well as the sea, usually at a considerable
height. At the fresh-water crater-lake, ‘El Junco,” on Chat-
ham Island, at an elevation of about twenty-six hundred feet,
several were observed bathing, or perhaps drinking,’ by
swooping down and letting their feathers touch as they passed
over the surface of the water. They frequently came about
the vessel in company with the Graceful Petrel, particularly
when turtle or tortoise fat was thrown overboard. One taken
off southern Albemarle on April 27 had a very small turtle in
its stomach.
I have never seen this species resting voluntarily on the -
water; in fact, the feathers become wet in a very short time if
immersed. It was seldom observed on shore except at the
nesting-places, where it was abundant. Outside of these
resorts, an occasional bird was seen sitting on the top of some
mangrove or on a jutting rock of a sea-cliff.
The Academy’s Expedition found Man-o’-war Birds nest-
ing on the following seven islands: Brattle in October; Cul-
pepper in September; Enderby in May; Gardner-near-Hood
in September; Hood in February, June, and September;
Tower in September; Wenman in September.
In the latter part of September, 1905, there was quite a
large colony nesting near the southeast extremity of Hood
Island. The majority of the nests contained well-feathered
young, although three fresh eggs were taken on September
1Cf. Fisher, Bull. U. S. Fish Comm., 1903, p. 31; Bonhote, Ibis, 1903, p. 312;
Lowe, Ibis, 1909, p. 334.
Vor. II, Pr. IJ GIFFORD—BIRDS OF THE GALAPAGOS ISLANDS 101
27. The nests rested on the tops of small shrubs (Sesuvium)
and were made of the dried stems of those plants. At the
same time on the neighboring Gardner Island there was a
small colony nesting in some bushes on the side of a cliff on
the north side of the island. The nests were built of twigs
and contained downy young.
On Brattle Island, October 30, they were likewise found
nesting in low bushes. The nests were built of twigs and
contained only well-feathered young.
In early February the Man-o’-war Birds were just begin-
ning to nest again on southeast Hood. As in the preceding
September, the nests were placed on the tops of small shrubs
about six inches above the ground. Many nests were almost
touching each other, so close together were they built. At
this time nesting had evidently only begun, for we saw a male
carrying nesting material, and all the eggs observed were
fresh. Males as well as females were sitting on the nests,
many of the former having their bright red pouches distended.
The majority of the males were in the iridescent black plum-
age. When sitting on the nest, the male often gives a call,
which resembles a chuckling laugh. I have never heard this
call except in the mating season. Both males and females on
the nest were silent when approached, but often defended
their homes quite vigorously, using their bills with telling
effect. During our February visit a pair were observed in the
act of coition on the nest, the male balancing himself quite
adroitly.
A very small young one in the down was taken on Enderby
Island on May 14.
On our third visit to Hood Island in the latter part of
June, a great many young which had just left the nest were
observed, all having pale brownish heads and necks and white
under parts. These were undoubtedly hatched from the eggs
laid in February. A good-sized flock of young birds re-
mained constantly over us, without beating their wings, as
we sailed along the coast, keeping the decks of the schooner
spattered with their droppings. On the southeast. part of
the island we found a good many nests which contained
young still in the down. One youngster was being cared for
by a Peruvian Booby. Of the Man-o’-war Birds, males as
102 CALIFORNIA ACADEMY OF SCIENCES [Proc. 4Tu Ser.
well as females were guarding the young. When approached
they usually remained quiet, only making a few passes at one
with their beaks. The youngsters, however, were quite noisy
and anxious to bite. An examination of the stomachs of sev-
eral young disclosed the remains of flying-fish. One adult male
was observed with a bright red distended pouch, which seemed
to be unusual at that time, as all the others had dull-colored
ones. This same male also uttered the chuckling call so com-
monly heard during the mating season. Other males gave an
occasional harsh scream. The air above the nesting-site was
constantly alive with birds flying hither and thither.
In the middle of September, 1906, Man-o’-war Birds were
found nesting all along the north coast of Tower Island, and
as far inland as the top of the island and the rim of the crater.
The nests were small, built of sticks, and placed in low Bur-
sera trees at an average of about seven feet from the ground.
Young in the down in all stages were found. When ap-
proached, the youngsters would open their bills and squeak in
a threatening manner.
On Wenman Island, on September 24, 1906, a few young
in down were noted on the ground and on small shrubs grow-
ing on the ledges of a steep hillside on the northwest side of
the island. On the plateau on the same side, several pairs
were found nesting in bushes about three feet above the
ground. One pair had a fresh egg, another a newly-hatched
youngster.
On a visit to Culpepper Island on September 25, 1906, a
number of young in the down were seen.
A very young bird in the down, taken on Enderby Island,
had china-blue feet and bill, the latter tipped with white. The
entire skin over the body was also china-blue.
The colors of the naked parts of birds taken on Hood in
the latter part of June, when the adults were in worn plumage
and the organs of reproduction small, were as follows: Orbital
ring ‘black in adult males, red in adult females, and pale blue
in immature birds. Bills were pale blue in all but adult males.
Three birds with large sexual organs were taken at
Academy Bay, Indefatigable Island, on July 16. Two were
adult females with orbital rings dark blue, gular sacs purplish,
Vot. II, Pr. I] GIFFORD—BIRDS OF THE GALAPAGOS ISLANDS 103
and feet red. The remaining bird, an adult male, had a bright
red gular sac.
The farthest south we saw the Man-o’-war Bird was lati-
tude 3° 41’ South on June 12, 1906. East of the archipelago
we met with it occasionally on the ocean, but it was nowhere
seen in any numbers except at Manta Bay, Ecuador.
On the voyage out from San Francisco we saw the first
Man-o’-war Bird at the Tropic of Cancer on July 22. At San
Benedicto, Revilla Gigedo Islands, they were nesting abun-
dantly on July 26, the nests being situated on the low land as
well as on a high mesa. The nests were built on the top of
clumps of grass, and in most cases contained a single white
fresh egg. Six nests out of about two hundred contained
two eggs each.
On July 27 and 28 we saw a number of Man-o’-war Birds
about the coast of the neighboring Socorro Island. On the
voyage from Socorro to Clipperton Island, Mexico, they were
seen occasionally. At Clipperton, August 10, we saw none
on the island, but there were two or three hundred sailing
over it during the forenoon. About noon they all headed
out to sea in an easterly direction.
Between Clipperton and Cocos Island, Costa Rica, a few
were seen. At Cocos, during the first half of September, they
were very common over the water and in the high trees in the
forest. Many males in fine glistening black plumage were
observed flying about with their bright red pouches distended ;
so, evidently, September was the opening of the breeding-
season, and undoubtedly the nests were placed in the tops of
the tall trees, where so many of the birds could be seen and
heard. At Cocos they persecuted the small Clipperton Nod-
dies as well as the boobies.
On the voyage home from Culpepper Island, we saw several
on September 26th in latitude 3° 29’ North, longitude 93° 6’
West; on the 27th in latitude 5° 34’ North, longitude 95° 27’
West. Then came a hiatus until October 7th, when one was
seen in latitude 14° 38’ North, longitude 109° 12’ West. After
that they were seen every day or so until October 24th, lati-
tude 19° North, longitude 116° 41’ West. They frequently
made unsuccessful attempts to alight on the topmast of the
schooner.
104 CALIFORNIA ACADEMY OF SCIENCES [Proc. 4TH Ser.
With one exception all the specimens of Fregata aquila in
the Academy’s collection are from the Galapagos Islands.
Birds in juvenal plumage, and assuming juvenal plumage,
have the entire head and neck a rich cinnamon-rufous. No
exception to this is found in the Academy’s series.
Five adult males and six adult females from the Galapagos
Islands measure in millimeters as follows: Males—Wing
595-660 (633) ; tail 400-490 (463); culmen 90-114 (104);
tarsus 18.6-23 (21.2) ; middle toe 46-51.4 (49.1). Females—
Wing 680-710 (696); tail 480-515 (503); culmen 122-
127 (125); tarsus 21-23.7 (22.7) ; middle toe 51-57 (54.8).
A series of sixty-seven eggs from San Benedicto and a series
of thirty-seven from the Galapagos Islands give practically the
same average length and breadth. Among the sixty-seven
San Benedicto eggs, however, the difference between the ex-
tremes is greater, as can be seen from the following measure-
ments in millimeters: San Benedicto—Length 63.1-77 (69.6) ;
breadth 43-50.6 (47.2). Galapagos—Length 64.1-74.6
(69.3); breadth 45.5-49.4 (47.5). A set of two eggs from
San Benedicto measured 68.9X47.2, 71.1X46.2.
Phaethon zthereus: REpD-BILLED TROPIC-BIRD
Abingdon, Albemarle, Barrington, Brattle, Champion,
Charles, Chatham, Culpepper, Daphne, Hood, Indefatigable,
Onslow, Tower, and Wenman islands.
Red-billed Tropic-birds were not seen in any numbers ex-
cept at Daphne, Hood, and Tower islands. They, were seen,
however, through the entire year. Usually they travelled
singly or in couples, but not in flocks. When met with away
from land, they frequently flew about the vessel two or three
times, keeping quite high in the air. The farthest point south
of the Galapagos Islands at which we saw these birds was in
2° 36’ south latitude.
During the breeding-season at Daphne Island I saw birds
circling about holes on the hillsides without beating their
wings. Whenever they came opposite certain holes they
would flutter their wings to check their flight, and come to a
standstill for an instant, as though about to alight, but they
would continue their circle. This was repeated ten or twelve
Vou. II, Pr. I] GIFFORD—BIRDS OF THE GALAPAGOS ISLANDS 105
times before the bird finally entered the hole. On Hood Island
they usually went directly to their holes without hesitation.
Only twice in the archipelago were these birds seen on the
water; once I saw three off Daphne Island, and on another
occasion one off Mt. Pitt, Chatham Island. In the latter case
the bird flew as we passed and shook itself just after getting
out of the water. As far as we observed, the tropic-birds are
practically immune from the attacks of Man-o’-war Birds.
On one occasion only did I see Man-o’-war Birds harass a
tropic-bird, and then without success.
The food of the Red-billed Tropic-bird, as shown by the
stomachs examined, consists of fish and squids. These were
very often disgorged by both young and old when they were
taken from their burrows. This species dives for its food
somewhat like a tern.
Red-billed Tropic-birds could be recognized at almost any
time by their cry, which is long and shrill and consists of a
lot of short, high, rasping notes given in quick succession.
Birds flying about the nesting-places often gave it, and birds
disturbed on the nest also gave it. The young when taken
from the nest uttered the same cry, and I have even heard a
young bird only a day or so old give three or four notes of it
when handled.
The nesting-places were usually holes in cliffs and hillsides
in the vicinity of the sea. As a rule the single egg was laid
at the end of a short burrow or in a cavity under a rock, but
sometimes it was laid in an open depression. I have found
them nesting two or three hundred feet above the sea, as for
instance, on Daphne Island, where they nest from top to bot-
tom of the island. Often two birds would be taken from a
burrow ; when such was the case no eggs or young were found.
One bird which I disturbed on its nest was in a good light so
that I could see it. It was sitting on its egg with wings droop-
ing at its sides, feathers raised, and every feature showing
rage at my intrusion.
The following are some of the breeding-places: Daphne
in April and November; Hood in February, September, and
October; Onslow in February. Young birds and eggs were
taken on Daphne in the latter part of November; a fresh egg
106 CALIFORNIA ACADEMY OF SCIENCES [ Proc. 47H Ser.
was taken on Hood, September 28, 1905, and eggs and young
in early February, 1906. On Hood I took a bird and a fresh
egg from a nest, in which five days before a pair of Swallow-
tailed Gulls held sway. Many tropic-birds were occupying
nests the owners of which had been killed less than a week
before. These facts give some idea of the great demand for
nesting sites on southeast Hood. At Onslow Island on Febru-
ary 25, I noticed two birds in holes in a rock about twenty
feet above the water, and I also saw a bird enter a hole.
On the voyage south from San Francisco we first met with
the Red-billed Tropic-bird to the west of San Martin Island,
Baja California, on July 9 and 10. We again saw one on
July 22 in latitude 22° 25’ North, longitude 112° 40’ West.
At San Benedicto, Revilla Gigedo Islands, they were fairly
common, and we saw some in holes in cliffs over the ocean.
On the coast of Ecuador, in the vicinity of Manta, on Septem-
ber 18, 19, and 20, we saw several. So all in all, it did not
prove a common species at sea on the voyage from San Fran-
cisco to the Galapagos Islands.
On the homeward voyage from the Galapagos, we saw
single birds on seven occasions, beginning on September 28,
1906, in latitude 7° 23’ North, longitude 97° 48’ West, and
ending on November 4, in latitude 26° 50’ North, longitude
126° 47’ West.
In life, the adults have the bill of a crimson color; outer
part of toes and webs black; tarsi and inner part of toes and
webs ochraceous buff; under sides of toes and webs pearl-
gray. The bills of the unfledged young are grayish and yel-
lowish, while the bills of the fully fledged young are a distinct
yellow.
An examination of the Academy’s series of adults from the
Galapagos Islands shows specimens from Daphne in Novem-
ber, which are apparently just completing a postnuptial moult,
as testified by new and growing primaries. The same remarks
apply to a specimen taken at Hood in February.
From the measurements given below, it appears that the
sexes are evenly matched in size. The long tail-feathers,
however, are so subject to wear and tear that it is doubtful
if any one measurement represents the total length of the
longest tail-feather in an absolutely perfect state. Of the
Vor. II, Pr. 1] GIFFORD—BIRDS OF THE GALAPAGOS ISLANDS 107
series of thirty-six males measured seventeen had tail—feathers
from 600 to 790 millimeters in length (average 658), while
of thirty-four females only two had tail-feathers over 600
millimeters in length (one measured 610, the other 667; aver-
age 639). The remaining measurements, in millimeters, are
as follows: Thirty-six males—Wing 301-332 (314); cul-
men 60.1-69.7 (64.7); tarsus 24.8-28.2 (26.5); middle toe
33.5-38.1 (36.2). Thirty-four females—Wing 304-335
(314) ; culmen 59-70 (63.9) ; tarsus 25-28 (26); middle toe
34.2-39.5 (36.5).
The Academy’s series of fifteen eggs shows apparently the
full variation in markings and shape ascribed in the books to
the eggs of this species. The fifteen eggs, representing as
many sets, yield the following extreme and average dimen-
sions: Length 54.5-67.2 (61); breadth 41.1-45.1 (43).
Phaethon rubricaudus: RED-TAILED TROPIC-BIRD
The Red-tailed Tropic-bird was positively identified on
three occasions. On July 30, 1905, we saw one in latitude
14° 58’ North, longitude 110° West. On August 21, 1905, in
latitude 7° 3’ North, longitude 101° 36’ West, one was shot,
but we failed to pick it up because of the speed at which the
schooner was sailing. On October 22, 1906, in latitude 17°
53° North, longitude 114° 45’ West, one circled about the ves-
sel several times.
On two occasions we saw birds which were unquestionably
of this species far north of the Tropic of Cancer. The first
case occurred on November 7, 1906, in latitude 29° 38’ North,
longitude 129° 2’ West, when three flew about the vessel. The
second case was on November 13, in latitude 32° 38’ North,
longitude 133° 32’ West, when one flew about the vessel.
Pelecanus fuscus: Brown PELICAN
Abingdon, Albemarle, Barrington, Bindloe, Brattle,
Charles, Chatham, Cowley, Daphne, Duncan, Gardner-near-
Hood, Hood, Indefatigable, James, Jervis, Narborough, Sey-
mour, and Tower islands.
When travelling along the rocky shores of the larger
islands, we frequently met with the Brown Pelican, usually
108 CALIFORNIA ACADEMY OF SCIENCES [ Proc. 47H Ser.
singly. When not fishing, this bird roosts on the rocks and
on the mangroves which are in many places found growing
along the sea-coast proper. Once or twice it was seen on the
ledges of sea-cliffs. Although quite easy to approach, it was
somewhat warier than the boobies. Occasionally one could
be surprised while standing asleep with its bill stuck down
the middle of its back. When approached closely, this species
keeps its wings trembling as if nervous. The habit is perhaps
similar to the twitching of the tail in certain herons.
In the Galapagos Islands Brown Pelicans serve as scaven-
gers. On several occasions they were observed to pick up the
bodies of large birds, after we had skinned them and thrown
them overboard. In one case an immature pelican had got
the bodies of two Galapagos Hawks into its pouch, and was
unable to swallow them. Likewise it was unable to fly on
account of the weight. It was probably grateful when we
rowed up to it, where it was sitting on the water, and removed
the impedimenta, for it flew away joyfully enough after-
wards.
We never saw a pelican make a graceful dive. Invariably
they just tumbled into the water from a few feet above it.
They often fished along the line of small breakers close to the
shore, and after making such a dive, frequently had to get up
hurriedly to avoid being overwhelmed by a wave.
No noise was ever heard from this species, except from the
young birds in the nests; and they can squawk vociferously—
the squawk being long and hoarse.
When nesting, the adult will frequently allow a person to
approach within two or three feet of it before leaving the nest,
which it makes no attempt to defend. I saw a pair copulating
on their nest at Tagus Cove, Albemarle Island, on April 1.
They had no eggs in the nest. All of the other nests of the
colony of ten or twelve had single birds on them. Some had
eggs, others none. The nests were bulky affairs of sticks
built in bushes on a steep hillside close to the water. The area
occupied was about one hundred yards by twenty-five yards.
The birds were somewhat wary, some flying upon the near
approach of the boat.
At South Seymour Island, on November 22, three nests
were seen in a low tree near the shore. Two had one young-
Vou. I, Pt.1] GIFFORD—BIRDS OF THE GALAPAGOS ISLANDS 109
ster each, and the third two. On northern Indefatigable, No-
vember 25, nests with young were observed in the mangroves
and also on the ground. On Jervis Island, December 18, a
young bird in the down was found in a nest in a low bush at
the top of a beach. At Academy Bay, Indefatigable Island,
in early November, young were observed in nests built at least
twenty feet above the ground in the mangroves. In the mid-
dle of the following January the same birds were observed
fishing, apparently under the supervision of their parents,
whose example they followed in diving into the water.
On March 12, a few miles west of Villamil, Albemarle
Island, four occupied nests were found in the low mangroves
fringing the rocky shore. They were built in the usual bulky
style, and the two which were examined each contained three
incubated eggs. At Banks Bay, Albemarle, April 11, three
nests were found in some small mangroves about eight feet
high. They were shallow, built of sticks, lined with grass,
and placed very little above the high-water mark. One had
naked youngsters in it; the second contained three eggs; and
the third was new.
In the middle of July, at Academy Bay, the same nests
which had young in them the previous November, again con-
tained partly-fledged, squawking youngsters, eight months
only having elapsed since the previous brood. They were
fed by running their bills well into the parent’s pouch and
gulping in the food.
Brown Pelicans bathe after the manner of most water-birds,
by beating the water with their wings. They were occa-
sionally “decoyed”’ to wounded birds. One day two or three
of this species and several Man-o’-war Birds flocked about
when a Blue-footed Booby was shot. As a rule the pelicans
did not associate with other species. Once or twice, how-
ever, they were observed fishing along with Blue-footed
Boobies, and at times roosting with them.
It was not unusual to see several Noddies fluttering ex-
citedly about a pelican when it was fishing, and often sitting
on its head’ while it swallowed the fish. Once I saw two on
a pelican’s head at one time. The pelicans never seemed to be
annoyed, nor did the Noddies ever get any fish so far as I
ok Audubon, Orn. Biog., v. 3, pp. 379, 380; v. 5, p. 213; Wells, Auk, v.. 19,
p. 242.
110 CALIFORNIA ACADEMY OF SCIENCES [Proc 47H Ser.
could see. Dusky Shearwaters would occasionally fly about
a pelican, apparently to pester it, for one day I observed a
pelican take refuge on the top of a cliff from a number of
them.
A comparison of the average measurements of a small
series of Galapagos and California birds shows the California
birds to be slightly the larger. The maximum, minimum, and
average measurements in millimeters of the Academy’s series
of adults from these two localities are given in Table XIII, p.
118.
GIFFORD—BIRDS OF THE GALAPAGOS ISLANDS 111
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120 CALIFORNIA ACADEMY OF SCIENCES [Proc. arm Ser. fH)
EXPLANATION OF PLATE I
Fig. 1. Spheniscus mendiculus (pp. 16-19). —
Fig. 2. Nest and eggs of Himantopus mexicanus (p. 54). Charles
Island; February 25, 1906.
Proc CaLAcan. Scr 4-7 Ser. VoL Il Pr] [GIFFORD) PLATE |
a
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122 CALIFORNIA ACADEMY OF SCIENCES [Proc. 41H Ser.
EXPLANATION OF PLATE II
Fig. 1. Nest and eggs of Nyctanassa violacea (pp. 59-62). Albemarle
Island; March 10, 1906.
Fig. 2. Butorides sundevalli on nest (pp. 62-65). Chatham Island; Feb-
ruary 10, 1906.
Proc CALAcaAD. Sci 474 Ser. VoL Pr] [GIFFORD]) PLATE 1]
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124 CALIFORNIA ACADEMY OF SCIENCES [Proc. 4TH Ser.
EXPLANATION OF PLATE III
Fig. 1. Salt lagoon with nests of Pha@nicopterus ruber at the edge of the
brush. Note crystalline deposits at the water’s edge (pp. 66-76).
James Island.
Fig. 2. Nest and egg of Phenicopterus ruber (pp. 66-76). Charles
Island; February 25, 1906.
Proc CaLAcap Sci 4.7* Ser. Vou fl Prd.
126 CALIFORNIA ACADEMY OF SCIENCES [Proc. 47H Ser.
EXPLANATION OF PLATE IV
Fig. 1. Nannopterum harrisi and nest (pp. 80-84). Albemarle Island;
April 16, 1906.
Fig. 2. Nannopterum harrisi and nest (pp. 80-84). Albemarle Island;
April 16, 1906.
Proc CaLAcan. Sci 47™ SER. VoL I] Pr.1 [GIFFORD | PLAT!
128 CALIFORNIA ACADEMY OF SCIENCES [Proc. 4TH Ser.
EXPLANATION OF PLATE V
Fig. 1. Sula piscatrix (pp. 85-89). Tower Island.
Fig. 2. Sula nebouxit on nest (pp. 93-97). Hood Island; October 1,
1906.
Proc CaLAcap Sci 47™ Ser. VoL IPT! [GIFFORD | PLATE
130 CALIFORNIA ACADEMY OF SCIENCES [Proc. 4tu Ser.
EXPLANATION OF PLATE VI
Fig. 1. Fregata aquila on nest (pp. 100-104). Hood Island; June 25, 1906.
Fig. 2. Fregata aquila on nest (pp. 100-104). Hood Island; June 25, 1906.
Proc CaLAcap Sci 47 Ser VoL II Pr]
132 CALIFORNIA ACADEMY OF SCIENCES [Proc. 47H Ser.
EXPLANATION OF PLATE VII
Fig. 1. Fregata aquila (pp. 100-104). Hood Island.
Fig. 2. Fregata aquila (pp. 100-104). Tower Island; September 14, 1906.
Proc CaLAcap. Scr 4. Ser. Vou {] PT]. LGIFFORD | PLATE
ss
PROCEEDINGS
OF THE
CALIFORNIA ACADEMY OF SCIENCES
FourtTH SERIES
Vou. II, Pr. I, pp. 133-202, pls. 8-11 SEPTEMBER 19, 1913
EXPEDITION OF THE CALIFORNIA ACADEMY
OF SCIENCES TO THE GALAPAGOS
ISLANDS, 1905-1906
Ix
THE GALAPAGOAN LIZARDS OF THE GENUS TROPIDURUS;
WITH NOTES ON THE IGUANAS OF THE GENERA
CONOLOPHUS AND AMBLYRHYNCHUS
BY JOHN VAN DENBURGH
Curator of the Department of Herpetology
AND JOSEPH R. SLEVIN
Assistant Curator of the Department of Herpetology
CONTENTS
PAGE
INTRODUCTION:
PREFATORY REMARKS - : _ 3 : 134
PREVIOUS COLLECTIONS AND STUDIES F 5 : ; : 135
List or NAMES PROPOSED 3 s ; ; ‘ 137
RELATIONS AND List oF KINDS RECOGNIZED. : : i 138
OrrcIn AND DistrrpuTion oF GALAPAGos Tropiduri . : ; 139
OricIn AND History oF GALApPAGOS ISLANDS . 5 ; : 140
SysTEMATIC ACCOUNT:
Key TO THE SPECIES A 3 5 : 0 5 3 5 142
Tropidurus pacificus : : 3 , 5 ; 5 143
Tropidurus duncanensis . 3 3 a 3 é < 147
Tropidurus habelii . : 5 4 : : ‘ : 150
Tropidurus bivittatus A 3 6 2 A : ‘ 155
Tropidurus delanonis 5 5 4 5 : 2 5 159
Tropidurus grayit : 5 3 : 164
Tropidurus albemarlensis barringtonensis 3 5 : 5 168
Tropidurus albemarlensis . a 6 : 3 3 6 172
Conolophus subcristatus . ; 5 : , ‘ : 188
Conolophus pallidus ., s fs j 5 : : 5 190
Amblyrhynchus cristatus . ; . . ; . 192
September 17, 1913
134 CALIFORNIA ACADEMY OF SCIENCES [Proc. 4TH Ser.
INT RODVME LION
PREFATORY REMARKS
In two previous papers by the senior author the Snakes and
the Geckos of the Galapagos Archipelago have been studied,
and an attempt has been made to trace the history of these
islands from the evidence afforded by these two groups of their
reptilian inhabitants. It is now proposed to publish the re-
sults of a similar investigation of the lizards of the genus
Tropidurus—an investigation undertaken for the purpose of
confirming or disproving the conclusions reached through
study of the Snakes and Geckos.
The material upon which this paper is based consists of
more than two thousand specimens from twenty-four islands.
The study of this collection has been an enormous task. Many
of the differences between species are differences in the size
and number of the scales. To show as clearly as possible all
differentiation along these lines, the scales around the middle
of the body, along the back, and along the belly have been
counted in fifteen hundred specimens, and the counts have
been charted island by island. This has involved the counting
of more than a quarter of a million scales. These counts have
all been made by Mr. Slevin in the following manner: 1.
Scale-rows—The number of rows of scales around the body
counted about midway between the fore and the hind limbs.
2. Crest—The number of scales in the crest-row from the
point where the crest begins back to a line drawn across the
back at the level of the anterior surfaces of the thighs, the
thighs being held at right angles to the main axis of the body.
3. Belly—The scales in a row along the middle of the belly
are counted from a line joining the anterior surfaces of the
arms when the fore limbs are held at right angles to the main
axis of the body, back to the anus. All measurements given
are in millimeters. All specimens are in the collection of the
Academy, and the numbers attached to them refer to the cata-
logue of specimens of the Department of Herpetology. Field
notes and descriptions of the coloration of living specimens are
in part by Mr. Slevin, and in part are quoted from Heller’s
paper on the reptiles of the archipelago. While the specimens
are recorded as males and females, this determination of sex
Ate et ee en ei
1
Vor. II, Pt. 1] VAN DENBURGH—SLEVIN—GALAPAGOAN LIZARDS (ge
rests only upon external characters. The internal organs have
not been examined.
The Galapagos lizards of the genus Tropidurus have been
much better known than any of the other reptiles of the archi-
pelago. This is due chiefly to the studies of the late Dr.
George Baur, from whose writings we shall quote.
PREVIOUS COLLECTIONS AND STUDIES
The presence of lizards in these islands probably was
recorded first by Amasa Delano in A Narrative of Voyages
and Travels published in Boston in 1817. He mentioned the
land “guana,” the sea “guana,” and lizards.
The largest kind of lizards found here resembles the land guana in
everything except size; they being only a little more than half the length.
Their color and coarse appearance are the same with exception of a
bright vermilion red throat; which makes it appear as if bloody. There
are to be found there also two smaller kinds of lizards. The smallest is
not much larger than a man’s finger. The size of the other kind is be-
tween the two. There is no particular difference in the shape of the three
kinds, but the color of the two latter is gray.
Charles Darwin, in 1835, during the voyage of the
“Beagle,” collected the specimens upon which Thomas Bell,
in 1843, based the first scientific description of a Galapagos
Tropidurus. These specimens “were taken in Chatham Island
and in Charles Island.” They were named by Bell Leio-
cephalus Grayu.
In 1851, Duméril recorded, under the name Holotropis
Grayui, some Galapagos specimens without definite locality
labels, which were collected during the visit of the “Vénus.”
Dr. Kinberg, during the voyage of the “Eugenie,” secured
lizards on Chatham, Charles and Albemarle islands. Dr.
Peters, in 1871, described the Chatham specimen as a new
species, Craniopeltis bivittata; and recorded the Charles and
Albemarle examples under the name Craniopeltis Grayit.
In 1872, Dr. Steindachner visited the Galapagos in connec-
tion with Louis Agassiz and the “Hassler” expedition. He ob-
served these lizards on Albemarle, Indefatigable, James, and
Jervis islands. Four years later Dr. Steindachner published
an account of the lizards and snakes of the Galapagos islands.
Dr. Habel, in 1868, had collected some lizards on ‘‘Indefati-
gable [?] and Bindloe” islands. These were described by
Dr. Steindachner, as Tropidurus (Craniopeltis) pacificus and
136 CALIFORNIA ACADEMY OF SCIENCES [Proc. 4ru Ser.
T. pacificus (var. Habelii). Craniopeltis bivittata Peters was
regarded as a synonym of Tropidurus (Craniopeltis) Grayui,
which was said to occur on Chatham, Charles, Albemarle,
James, Indefatigable, and Jervis islands.
In 1877, Dr. Giinther recorded the specimens secured by
Cookson, during the visit of the “Peterel.”’ The Albemarle
lizards were regarded as Liocephalus Grayit (Bell), while
those from Abingdon were referred both to this species and
to L. pacificus (Steind.). Steindachner was followed in re-
garding Craniopeltis bivittata Peters as a synonym of L.
Grayit.
Boulenger in his Catalogue of Lizards, 1885, accepted the
views of Gunther, but placed these lizards in the genus Tropi-
durus.
In reporting upon the collections made by the “Albatross”
in 1887-88, Professor Cope, in 1889, recorded Tropidurus
grayi from James, Gardner, Hood, Indefatigable, Albemarle,
and Duncan islands. The Duncan specimens were mentioned
as a variety with a dark lateral band not very distinct. Speci-
mens from Abingdon were referred to Tropidurus pacificus,
while those from Chatham were described as a new species,
Tropidurus lemniscatus.
The following year, Dr. George Baur studied these speci-
mens collected by the “Albatross,” one hundred and twenty-
eight in number, and published his conclusion that nearly
every island has its peculiar variety or species of Tropidurus,
and no island has more than one kind. He described five new
species, and stated the distribution of Tropidurus, in the archi-
pelago to be as follows:
Tropidurus Grayii Bell Charles Island
s lemniscatus Cope Chatham Island
- pacificus Steindachner Bindloe Island
a Delanonis Baur Hood and Gardner islands
as Albemarlensis Baur Albemarle Island
es indefatigabilis Baur Indefatigable and James islands
Hy Duncanensis Baur Duncan Island
Abingdonensis Baur Abingdon Island
The name Tropidurus Delamonis was changed in the reprints to T.
Hoodensis.
Dr. Boulenger reviewed the subject in 1891, and concluded
that Craniopeltis bivitta Peters differed from Leiocephalus
Grayu Bell; that Tropidurus lemniscatus Cope is a synonym of
Craniopeltis bivittata Peters; that T. habelii and T. abingdonti
Vor. II, Pr. 1] VAN DENBURGH—SLEVIN—GALAPAGOAN LIZARDS 137
are synonyms of T. pacificus; and that Baur’s other new spe-
cies were not worthy of separation from T. grayii.
During 1891, Dr. Baur visited the Galapagos Archipelago,
and made large collections. His final study of the genus Tro-
pidurus was published in 1892 in the Festschrift fiir Leuckart.
In this article Dr. Baur recognizes the following species of
Tropidurus from the Galapagos Islands:
1. Tropidurus Grayii Bell Charles Island
(a a Barringtonensis Barrington Island
new species
3 4 indefatigabilis Baur Indefatigable Island
4 ss Jacobti new species James and Jervis islands
Bi. S Albemarlensis Baur Albemarle Island
6. iS Delanonis Baur Hood and Gardner islands
as a Duncanensis Baur Duncan Island
8 = pacificus Steindachner Abingdon Island
9. s Habelii Steindachner Bindloe Island
10. s bivittatus Peters Chatham Island
The Hopkins-Stanford Galapagos Expedition secured large
series of these lizards, which were studied by Edmund Heller.
His paper, published in 1903, is the most recent review of the
subject. Heller had no specimens from Charles Island. He
recognized eight forms, as follows:
T. grayi grayi Bell Charles, Indefatigable, James,
Jervis, and Albemarle islands
T. grayi magnus new subspecies Narborough Island
T. grayi barringtonensis (Baur) Barrington Island
T. duncanensis Baur Duncan Island
T delanonis Baur Hood Island and Gardner-near-
Hood
T. bivittatus (Peters) Chatham Island
T. habeli (Steindachner) Bindloe Island
T. pacificus Steindachner Abingdon Island
List or Names ProposED
The following is believed to be a complete list of the names
proposed for Galapagos lizards of the genus Tropidurus, with
their dates and type-localities :
1843 T. grayii (Bell) Charles Island
1871 T. bivittatus (Peters) Chatham Island
1876 T. pacificus Steindachner Abingdon Island
1876 T. habelii (Steindachner) Bindloe Island
1889 T. lemniscatus Cope Chatham Island
1890 T. delanonis Baur Hood Island
1890 T. albemarlensis Baur Tagus Cove, Albemarle Island
138 CALIFORNIA ACADEMY OF SCIENCES [Proc. 4TH Ser.
1890 T. indefatigabilis Baur Indefatigable Island
1890 T. duncanensis Baur Duncan Island
1890 T. abingdonensis Baur Abingdon Island
1890 T. hoodensis Baur Hood Island
1892 T. barringtonensis Baur Barrington Island
1892 T. jacobii Baur James Island
1903 T. grayi magnus Heller Narborough Island
T. hoodensis is merely a substitute name. T. lemniscatus is
a synonym of T. bivittatus, as T. abingdonensis is of T. pa-
cificus. Thus we have left eleven names, which have been
given to the lizards of as many different islands. How many
of these are entitled to recognition?
RELATIONS AND List oF Kinps RECOGNIZED
There can be no doubt that Baur was right in his belief that
only one kind of Tropidurus occurs on any one island. It is
true also that many of the islands have distinct and peculiar
forms of Tropidurus. But when we come to study these liz-
ards we find that differentiation has proceeded much farther
upon some islands than upon others. The most distinct of all
are the Abingdon, Bindloe, Duncan, and Chatham lizards.
There can be no doubt that they should be regarded as four
species. The next in point of distinctness is the Hood Island
form. Then comes the Charles Island lizard, which in cer-
tain characters resembles that of Hood, while in others it is
more like that of Barrington. The last mentioned (Barring-
ton form) stands next as a sort of connecting link between
the lizards of Hood and Charles islands on the one hand, and
its still closer relatives of the central and western islands, as
yet unmentioned, on the other. The lizards of these three
islands (Hood, Charles and Barrington) certainly are distinct,
but there easily may be some difference of opinion as to
whether they should rank as full species or as subspecies. The
Tropiduri of Indefatigable, James, Jervis, Albemarle, and
Narborough islands are most closely related. Very large
series enable us to show that the lizards of these islands are not
absolutely identical, but differentiation is as yet so slight that
it seems best to use but one name for all.
We, therefore, shall describe the Tropiduri of the Galapagos
Islands under the following names:
Vor. II, Pt. 1] VAN DENBURGH—SLEVIN—GALAPAGOAN LIZARDS 139
1. T. pacificus Abingdon Island
2. T. duncanensis * Duncan Island
3. T. habelii Bindloe Island
4..T. bivittatus Chatham Island
5. T. delanonis Hood and Gardner islands
6. T. grayii Charles, Gardner, Champion,
and Enderby islands
7. T. albemarlensis barringtonensis Barrington Island
8. T. albemarlensis Indefatigable, S. Seymour, N.
Seymour, Daphne, James,
Jervis, Cowley, Brattle, Albe-
marle, and Narborough is-
lands
ORIGIN OF THE GALAPAGOS LIZARDS OF THE GENUS
TROPIDURUS
The genus Tropidurus,as at present understood, is confined to
the Galapagos Archipelago and South America. It has been re-
ported from Paraguay, Argentine, Chile, Bolivia, Peru, Equa-
dor, Brazil, Dutch Guiana, and Venezuela. The closely allied
genus Leiocephalus occurs in Bolivia, Peru, Equador, Colom-
bia, Brazil, the Greater and Lesser Antilles and the Bahamas.
It is evident, therefore, that the affinities of these Galapagos
lizards are South American and West Indian. Either the
lizards of the Galapagos have been derived from South
America, or those of both localities have common ancestors.
In the Galapagos Archipelago, Tropiduri occur on almost
every island, islet, and rock. The notable exceptions are Cul-
pepper, Wenman, and Tower islands. They have been found
on Abingdon, Bindloe, Chatham, Hood, Gardner-near-Hood,
Charles, Enderby, Champion, Gardner-near-Charles, Barring-
ton, Indefatigable, North and South Seymour, Daphne, James,
Bartholomew, Jervis, Duncan, Cowley, Brattle, Albemarle, and
Narborough islands.
The fact that these lizards occur on nearly every island of
the archipelago can be explained only in one of two ways.
These Tropiduri must have reached these islands either by
land or by water. Either they have been carried to each
island, islet, and rock by some such means of dispersal as float-
ing driftwood driven by the winds and currents, or else they
were already on each island at the time when it became sep-
arated from a larger land-mass. The former view has been
held by those who believe that these islands never have been
connected, but have been independently thrust above the sur-
face of the ocean. The latter explanation finds favor with
140 CALIFORNIA ACADEMY OF SCIENCES [Proc. 4TH SER.
those who believe that these islands all formerly were con-
nected, and formed part of a single large island which, some-
time, must have been connected with continental America.
We can see but little to commend the former view, for the
means of dispersal from continent to island or from island to
island over the intervening water must, in the nature of things,
be but accidental or occasional, and must seem quite inade-
quate to account for the wide distribution of these lizards in
the archipelago. Again, Wenman and Culpepper islands lie
directly in the path of the currents from the other islands, yet
both are without Tropiduri. Furthermore, were such means
of dispersal sufficient to bring about the wide distribution of
these reptiles, we must believe that the interchange of lizards
between the islands would result either in preventing differ-
entiation on the various islands, or in the transportation of
differentiated races from island to island. Thus we should
expect to find either one kind of lizard on all the islands, or a
tendency toward the distribution of all kinds of lizards to each
island. But many of the islands have each its peculiar kind
of Tropidurus, and no island has more than one kind. Even
in the case of Duncan Island, almost surrounded as it is by
other close-lying islands, the evidence all points to complete
isolation during a long period of time.
ORIGIN AND History oF THE GALAPAGOS ISLANDS
We, therefore, adopt the other theory: that there formerly
was a single large island inhabited by one species of Tropi-
durus; that through partial and gradual submersion this island
became divided into the many islands of the present archi-
pelago; that each island after its separation was occupied by
those animals which inhabited it before; and that the present
fauna of each island is directly descended from its original
inhabitants.
It is probable that the separation of the various islands oc-
curred at different times rather than simultaneously.
If it be admitted that the degree of differentiation in a single
group, under conditions such as obtain in these islands, may
be regarded as an index to the period of isolation, we may pro-
ceed to sketch the history of the archipelago as indicated by
the lizards of this genus.
Vor. II, Ptr. 1] VAN DENBURGH—SLEVIN—GALAPAGOAN LIZARDS 141
The Tropiduri of Abingdon, Bindloe, Duncan, and Chat-
ham islands show the greatest differentiation. Accordingly,
we may believe that these islands early became separated from
each other and from the remaining portions of the group, and
have maintained independent existence ever since.
The next lizard, in point of distinctness, is that of Hood
Island. Hence it would seem probable that this southern
island was the one next separated. The closest relationship
of this Tropidurus seems to be with that of Charles Island.
This relationship is not nearly so striking as in the case of
the snakes and geckos of these two islands, but it nevertheless
may be interpreted as indicating some connection between
these islands in the past, probably subsequent to their separa-
tion from the rest of the archipelago.
The Tropidurus of Gardner-near-Hood appears to be
identical with that of the main island, so that the separation
of this islet from Hood doubtless is of recent date.
The Charles Island lizard is, in a sense, intermediate be-
tween those of Hood and Barrington islands. This apparent
relationship with the Barrington form inclines one to believe
that the former connection of the Hood-Charles island with
the remainder of the archipelago may have been by way of
Barrington.
The lizards of Enderby, Champion, and Gardner-near-
Charles do not differ from those of the larger island. The
separation of these islets from Charles Island, therefore, may
be regarded as having occurred much later than the separation
of Charles from Hood.
Barrington Island probably was the next to assume an in-
dependent existence.
The lizards of the remaining islands—Indefatigable, the
Seymours, Daphne, James, Jervis, Cowley, Brattle, Albemarle
and Narborough—show so little differentiation that we are
led to the conclusion that all of these islands were connected,
and formed a single large island for some time after the sep-
aration of Barrington. It is probable that a large bay ex-
tended from the south toward the center of this island, com-
pletely surrounding Duncan Island with water.
The history of this large central island cannot be clearly
traced farther from evidence afforded by the Tropiduri.
142 CALIFORNIA ACADEMY OF SCIENCES (Proc. 41H Ser.
Nevertheless, the examination of very large series discloses
certain average differences, and certain resemblances, which
lead us to believe that, during a considerable period of time
after this large island was broken up, Narborough Island re-
mained connected with Albemarle, as did James with Jervis,
and Indefatigable with the Seymours. Brattle and Cowley
islands doubtless were joined to Albemarle, and Bartholomew
to James. Curiously enough, the Tropiduri of Daphne Island
seem to resemble those of James Island more closely than they
do those of the Seymours and Indefatigable, although the lat-
ter lie much nearer.
Thus we find that the evidence gathered from a study of
the Tropiduri points to the gradual depression and partial sub-
mersion of a former Galapagos Land, resulting in its division
into many smaller islands and islets. The story agrees in al-
most every detail with that which we have previously gathered
from an investigation of the snakes and geckos. The chief
points of difference are that the snake of Barrington is less
differentiated than the lizard, and the Tropiduri afford less
evidence than do the snakes of a former division into an
Albemarle—Narborough Island and a James—Jervis—Indefati-
gable Island.
SYSTEMATIC ACCOUNT
KEY TO THE GALAPAGOS TROPIDURI
a.—Sides of neck scaly, with fewer folds.
b.—Scales around body not more than 65; males longitudinally
striped. Chatham.
T. bivittatus.—p.
—Scales around body more than 65; no longitudinal stripes.
Bindloe.
T. habelii.—p.
a.2—Sides of neck granular between folds; folds more numerous.
bb.—Hind legs of males with definite blackish spots; interparietal
plate seldom much broader than long; scales around body
not more than 80.
c.—36 to 48 scales in crest; smaller; little red in coloring.
Charles.
T. grayii—p.
c.2—50 to 61 scales in crest; larger; usually much red. Hood.
: T. delanonis.—p.
bb.—Hind legs without definite blackish spats; interparietal
usually much broader than long; or scales around body
more than 80.
cc.—Scales around body more than 75.
d—Head above speckled with lighter spots; no red in general
coloration; scales around body 85 to 101. Abingdon.
Vor. Il, Pr. 1] VAN DENBURGH—SLEVIN—GALAPAGOAN LIZARDS 143
T. pacificus.—p
2—Head not speckled above; more or less suffused with
red; scales around body 76 to 92. Duncan.
T. duncanensis.—p.
cc.2—Scales around body fewer than 76.
dd.—Scales smaller, 61 to 76 around body. Barrington.
T. albemarlensis barringtonensis.—p.
dd2—Scales larger, 50 to 69 around body. Indefatigable,
James, Jervis, Albemarle, Narborough, etc.
T. albemarlensis.—p.
Tropidurus pacificus Steindachner
Abingdon Island Lizard
1876, Tropidurus (Craniopeltis) pacificus, STEINDACHNER, Festschrift
Zool-Bot. Ges. Wien, 1876, p. 313, pl. II, fig. 3 (type locality Indefati-
gable [?] and Bindloe Islands, Galapagos Archipelago).
1877, Liocephalus pacificus, GUNTHER, Proc. Zool. Soc. Lond., 1877, p.
67 (part).
1885, Tropidurus pacificus, BoutencEr, Cat. Lizards Brit. Mus., I, 1885,
p. 173; Cort, Proc. U. S. Nat. Mus., XII, 1889, p. 147; Bourencer, Ann.
and Mag. Nat. Hist., (6), VII, p. 501 (part); Baur, Festschrift ftir
Leuckart, 1892, p. 270; Hetrer, Proc. Washington Acad. Sci., V. 1903, p. 83.
1890. Tropidurus abingdonii, Baur, Biol. Centralbl., X, 1890, p. 479
(type locality Abingdon Island, Galapagos).
Diagnosis —Sides of neck with numerous folds; skin be-
tween neck-folds granular; hind legs without definite blackish
spots; interparietal usually much broader than long; 83 to 101
scales around middle of body; top of head mottled or speckled
with light color; a middorsal light streak in males.
Type-—Vienna Museum. Collected by Dr. Habel on “In-
defatigable [ ?] and Bindloe Islands,” Galapagos Archipelago.
Specimens with the high scale counts given by Dr. Steindach-
ner, however, could only have come from Abingdon.
Distribution.—This species occurs only on Abingdon Island,
Galapagos Archipelago.
Material—The Academy’s collection contains about one
hundred and fifty specimens, of which fifty-seven males and
sixty-five females have been included in the scale counts.
Description of adult male, No. 12587——The head is covered above with
smooth scales; interparietal largest, broader than long; five or six large
supraoculars; superciliaries imbricate; five superior and five inferior
labidls to below middle of eye; rostral very broad and low; symphyseal
broad, followed by a series of large sublabials, of which all but the first
are separated from the infralabials by a row of smaller plates. Ear-
opening large, with an anterior denticulation of five or six long, narrow
scales. Side of neck between ear-opening and fore limb with numerous
folds, covered with granular scales. A strong antehumeral, but no com-
plete gular, fold. A well-developed medium dorsal crest begins half the
length of the interparietal behind this plate, and runs continuously to and
along the tail, being highest on the proximal fourth of the tail. The
dorsal regions of the neck, body, and tail are covered with rather small,
keeled, mucronate scales, which, on the body, change gradually to smaller,
144 CALIFORNIA ACADEMY OF SCIENCES [Proc. 47H Srp.
keeled, mucronate laterals. These again change gradually into the
smooth ventrals, which are a little smaller than the dorsals. The gular
scales are smooth, smaller posteriorly, smallest below the ears. The
scales on the chest are largest, smooth, and imbricate. The limbs are
provided above with keeled, and below with smooth, scales. The posterior
surface of the thigh is covered with smooth sub-granular scales, between
which smaller granules may often be seen. The lateral caudals are
strongly keeled and mucronate, while the inferior caudals are smooth
proximally, but become keeled on the distal portion of the tail.
The general coloration in alcohol is grayish brown, spotted with
black on the fore limbs, back, and sides of neck and body, temples, chin,
throat and chest. These black markings tend to form vertical bars on
the neck and anterior dorsal region. There is an antehumeral black
blotch, and the posterior gular region is mostly black. The head, neck,
body, limbs, and tail are speckled with light bluish gray, and a band of the
same color runs along the median dorsal region. The hind limbs are not
distinctly spotted with black.
Wenigth’ CO} ANUS tpn averaxecaue a ehave Ve etere Rlatenseevere mm. 100
Jeength® Of tail. sis.) sais Gieweoasatienisiecncestsioe 143+
SnotitstOl Cam ccasccas occu cosas coe Ooine 22
Widths o£ head! a\.cakecrassete trere-cereeeavetsleictersrecate 17
BOre. MIMD wens sale crapaies we cee seme yeeeeiae © 45
Ebani@oiara bis © sale sore. aves aqerete whatatersts atereverstaeevarevetcle 69
Base of fifth to end of fourth toe .......... 25
Height Of (crest, On Nape. siemens <reyaeee ce eres 1:2
Height of crest on midbody ............... 12
Eleieht, Of crest Onyctall) selasctateas- serie 2:3
Coloration in life of adult male-——Dorsum grayish brown;
the back crossed by several series of transverse black bars, most
distinct anteriorly, interrupted medially and on sides. Dorsal
crest and the scales at its base light greenish gray; dorsum,
tail, and limbs spotted with same. Top of head reddish brown,
nape olive brown. Fore limbs brownish, barred above like the
back. Tail becoming dusky toward tip, without lighter spots.
Chin and sides of mandible pinkish; throat deep brown; chest
light brown, dark-spotted, the scales with light margins; fore
limbs below like the chest, slightly more buffy. Belly, hind
limbs, and tail inferiorly light olive gray. Sides of head from
snout to ear-opening red, shading into seal brown on the neck.
A black antehumeral spot. Sides of body reddish, black-
spotted.
Coloration in life of adult female—Whole, head, nape, shoul-
ders, back anteriorly, and sides of body brick red; fore limbs
reddish, becoming olive gray distally. Dorsal crest and median
line of back greenish gray; dorsum from middle of back, tail,
and hind limbs above olive brown, spotted with the color of
the dorsal crest. Belly, tail, and hind limbs inferiorly light
olive gray. Breast and sides of body light brick red; throat
dark red; lower jaw light like the breast. Fore limbs below
Vo. II, Pt. 1] VAN DENBURGH—SLEVIN—GALAPAGOAN LIZARDS 145
brick red proximally, lighter grayish distally. Antehumeral
spot black.
V ariation.—There is much variation in the size, number and
arrangement of the head scales. The characteristic coloration
in the males is fairly constant. Females show few or no
black markings, though traces of them may often be made out
as spots of brown darker than the ground color. The belly
usually is slaty or bluish gray, sometimes yellowish. Many
females have the head and sides of neck suffused with brick
red. The number of scales around the middle of the body
varies from 83 to 101; in the crest from 46 to 61; and along
the belly from 70 to 85. Variation in these respects will be
found in the following:
TABLE OF SCALE COUNTS—ABINGDON ISLAND
Scale Scale
Number Sex | Rows Crest Belly Number Sex | Rows Crest Belly
12475 foil 88 54 81 12476 9 86 47 80
12477 rou 86 $1 78 12478 2 88 59 78
12479 fou 89 ale 79 12481 9 87 iS} 84
12480 a 86 58 82 12484 1°) 87 55 83
12482 a 88 57 83 12511 ie) 92 54 79
12483 ot 97 55 81 12512 ie) 90 56 78
12485 fof 86 56 85 12513 ce) 90 58 79
12486 fo 93 57 79 12514 °) 90 48 74
12487 fof 85 ae 77 12515 2 88 47 70
12488 fof 92 Sh) 83 12516 ie) 89 59 80
12489 foil 86 54 79 12517 2 88 56 81
12490 fof 90 55 83 12518 2 97 60 83
12491 fol 88 56 81 12519 g 95 61 82
12492 fof 9%6 54 80 12520 9 87 60 79
12493 Cf 93 52 77 12521 2 88 53 74
12494 fos 90 Ne 74 12522 ie) 91 58 78
12495 fol 87 57 83 12523 fe) 88 57 82
12496 fos 90 a 83 12524 °) 90 61 76
12497 foil 88 53 79 12525 ie) 88 58 75
12498 ro 91 57 76 12526 ce) 88 55 75
12500 a 93 54 83 12527 9 88 53 74
12501 fof 91 S1 77 12528 2 97 60 83
12502 fof 88 58 78 12529 2 97 61 80
12503 fos 91 an 79 12530 fe) 96 59 77
12504 cf! 92 51 82 12531 ie) 93 52 75
12505 fof 96 46 83 12532 9 86 56 79
12506 foil 95 49 81 12533 9 89 60 83
12507 fol 93 51 80 12534 is) 94 57 77
12508 foi 97 55 79 12536 9 92 58 78
12509 foil 91 52 80 12537 ce) 86 54 82
12585 Cy 89 Ws 85 12538 io) 94 59 79
12586 fol 91 54 79 12540 iS) 93 59 82
12587 fof 90 56 85 12541 9 91 60 82
12588 fof 89 56 85 12542 se) 90 59 78
12589 fof 93 $1 79 12543 9 91 53 77
12590 Toil 85 oo 77 12544 9 86 54 71
12591 J 88 58 83 12545 io) 87 54 82
a a a a
146 CALIFORNIA ACADEMY OF SCIENCES [Proc. 4TH Ser.
TABLE OF SCALE COUNTS—ABINGDON ISLAND—Continued
Scale Scale
Number Sex | Rows | Crest Belly Number Sex | Rows | Crest Belly
————E—EEE
12593 fou 91 54 85 12594 9 88 52 80
12598 rol 91 54 82 12596 2 86 xo 74
12600 fois 84 48 78 12597 ie) 90 ‘52 74
12604 fot 87 52 82 12599 io) 84 53 79
12605 rol 87 58 81 12603 ie) 94 54 78
12606 rol 90 53 83 12609 iS) 92 55 80
12608 rol 90 55 83 12611 2 92 SL 84
12610 rot 89 54 83 12615 ie) 84 52 79
12612 fou 88 55 83 12617 9 88 55 80
12613 ref 92 53 83 12618 ie) 83 io 76
12614 rol 90 55 83 12619 io) 90 56 80
12616 (of 91 58 83 12620 2 91 ar 80
12622 fot 90 57 79 12621 2 88 ah 77
12626 ef 86 53 81 12623 i 86 55 77
12627 roi 88 54 80 12624 2 89 58 76
12628 rofl 90 58 aa 12632 2 85 56 74
12629 fol 90 - 78 12633 Q 83 55 76
12630 ro 87 55 76 12634 9 87 56 80
12631 of 91 55 79 12636 te) 92 56 78
12640 fol 85 Bye 75 12637 2 95 56 82
12638 9 90 56 dil.
12644 ie) 89 51 74
12645 9 91 56 79
12646 ij 84 55 76
12647 2 89 54 78
12649 9 90 56 80
12652 2 93 53 84
12653 ie} 88 58 Vi
Habits—Abingdon Island, Sept. 18 and 22, 1906. Went
ashore on the south side of the island. Landed on a good sand
beach and worked inland about a mile. About half way up
the mountain a distinct green zone is plainly visible, while the
lower part is brown lava, not very rough, and covered spar-
ingly with cactus and trees. The lizards are abundant in this
lower portion, especially near the beach, which swarms with
seal-flies. Several stomachs examined contained these flies
and the leaves of a succulent plant which grows on the beach.
Lizards are most abundant near the beach, but their range ex-
tends up to 1500 feet, where they are rather scarce.
“The food is chiefly vegetable, varied with insects, etc.
Stomachs examined contained berries, hard seeds, and blos-
soms, with an occasional grasshopper, beetle or other insect.
The seed capsules and berries are eaten for the fleshy part sur-
rounding the seeds, which is the only part digested, the seeds
passing unchanged through the alimentary canal.” ( Heller.)
Vor. II, Ptr. I] VAN DENBURGH—SLEVIN—GALAPAGOAN LIZARDS 147
General remarks.—The Abingdon Island Tropidurus is a
very distinct species. It has smaller scales than any other
species found in the archipelago. In scale characters it most
resembles the species of Duncan Island, but has rather smaller
scales and a very different coloration. The peculiar light
speckling of the upper surfaces, and particularly of the head,
seems to be quite characteristic, and is shown by both sexes.
Tropidurus duncanensis Baur
Duncan Island Lizard
1889, Tropidurus grayi, Cope, Proc. U. S. Nat. Mus., XII, 1889, p. 145
(part) ; Boutencer, Ann. and Mag. Nat. Hist., (6), VII, 1891, p. 502
(part).
1890, Tropidurus duncanensis, Baur, Biol. Centralbl., X, 1890, p. 479
(type locality Duncan Island Galapagos Archipelago); Baur, Fest-
schrift fiir Leuckart, 1892, p. 270; Hetitrer, Proc. Washington Acad. Sci.
Wis 19033) pe 77.
Diagnosis.—Sides of neck with numerous folds; skin be-
tween neck folds granular; hind legs without definite blackish
spots; interparietal usually much broader than long; 76 to
92 scales around middle of body; top of head unicolor; no
middorsal streak; often much red in coloration.
Types.—U. S. National Museum Nos. 14941 to 14944.
Collected by the U. S. Fish Commission Steamer ‘“‘Albatross,”
on Duncan Island, Galapagos Archipelago, between April 4
and 16, 1888.
Distribution.—Duncan Island, Galapagos Archipelago.
Material—The Academy collection contains about one
hundred specimens, of which thirty-nine males and forty-eight
females have been included in the scale counts.
Description of adult male No, 12203.—The head is covered above with
smooth scales; interparietal largest, broader than long; four or five su-
perior and as many inferior labials, to below middle of eye; rostral very
broad and low; symphyseal much narrower, followed by a series of large
sublabials, of which all but the first are separated from the infralabials
by a row of somewhat smaller plates. Ear-opening large, with an an-
terior denticulation of six or eight long, slender scales. Side of neck be-
tween ear-opening and fore limb with numerous folds, covered with
granular scales. A strong antehumeral, but no complete gular, fold. A
well-developed median dorsal crest begins four scales behind the inter-
parietal, and runs continuously to and along the tail, being highest on the
proximal third of the tail, and absent toward its tip. The dorsal regions
of the neck, body, and tail are covered with rather small, keeled, mucronate
scales, which, on the body, change gradually to smaller, keeled, mucronate
laterals. These again change gradually into the smooth ventrals, which are
much smaller than the dorsals. The gular scales are smooth, smaller
posteriorly, smallest below the ear. The scales on the chest are about as
large as the dorsals, smooth and imbricate. The limbs are provided above
148 CALIFORNIA ACADEMY OF SCIENCES [Proc. 4TH Ser.
with keeled, and below with smooth, scales. The posterior surface of the
thigh is covered with imbricate scales, a few of which are keeled. The
lateral caudals are strongly keeled and mucronate, while the inferior
caudals are smooth proximally, but become keeled on the distal portion
of the tail.
The general coloration in alcohol is grayish brown, with very small
scattered black spots on the body, neck, and fore limbs. Some larger
black spots on chest and throat, the center of which is dark blackish
brown. No vertical dark blotches or distinct rounded spots or light
medium band on back. There is a black antehumeral blotch. The top
and sides of the head are dark olive brown, unicolor. The hind limbs and
tail are lighter olive brown, unspotted. The chest and center of belly
are grayish white. The throat and sides of belly, head, and body are
suffused with red.
Wenath to) anuSsiemmeniteectocreieisenter tee eiciaeete mm. 95
Thength ork stail sc istics eesemertre ene nee esters 132
SNOULMEOUEAT Ns wich etieeist yes eilec ete 19
Wiadthwot head saw sjcassee cases onesies sie cie 15
Bornes limb) | 2 jeeschs diceblacionissot settle wicloe ae SY)
Et iidw limbs ss ccscrre nan soem eae seers 64
Base of fifth to end of fourth toe .......... 25
Height of crest. ony Mapes js seitecaimseeies sims 1.1
Height of crest on midbody ............... 1
Hersht of/erest Onitail a eccsn cee cccterereieice ates 2
Coloration in life of adult male.—Above olive brown, black-
spotted except the head; tail more brownish with few dark
spots; hind limbs and tail light blue, gray-spotted; fore limbs
dark-spotted like the back. Sides of head and body, from
snout to tip of tail, brick red, finely black-spotted on sides and
along the belly, where the red is brightest; a black ante-
humeral spot. Throat black; breast, mandible, and fore limbs
reddish, black-spotted; chin, belly, hind limbs, and tail in-
feriorly red.
Coloration in life of adult female—Above olive brown.
Sides of head and body from snout to tip of tail brick red,
darkest dorsally where the red extends high up and encroaches
on the dorsum, brightest along the belly; a black antehumeral
spot. Below red from mandible to tip of tail, darkest an-
teriorly on lower jaw, brightest on tail; breast and belly
lighter, breast dark-spotted.
Variation.—Females have more of the red suffusion than
the males, and show fewer black spots on the sides and back,
and less black on the throat. In some females the red covers
not only the lower surfaces of the belly, sides, and tail, but
extends up on the back.
The head-scales are subject to considerable variation. The
interoccipital is always very large, though it sometimes is only
a little wider than long. There seems to be but little variation
Vou. II, Pr. 1] VAN DENBURGH—SLEVIN—GALAPAGOAN LIZARDS 149
in the keeling and arrangement of the body-scales.. The
range in scale counts is given in the following table:
TABLE OF SCALE COUNTS—Duncan ISLAND
Scale Scale
Number Sex | Rows | Crest | Belly Number Sex | Rows | Crest Belly
10561 hy 76 55 84 12176 °) 76 Ss! 82
10562 fou 89 57 86 12177 2 84 52 91
10565 fol 82 53 ae 12178 g 82 55 91
10566 fof 84 50 86 12183 ie) 84 58 92
12172 CH 86 52 87 12185 °) 91 an 89
12173 ou 81 50 80 12186 2 89 55 90
12174 fol 91 59 88 12187 2 80 53 82
12175 fou 82 57 86 12188 is) 85 59 86
12179 rol 92 49 88 12189 2 80, 55 82
12181 fof) 85 51 86 12193 ie) 80 56 85
12182 fof 82 53 87 12194 2 84 54 90
12184 (of 92 53 84 12195 9 82 55 87
12188 fou 79 51 80 12197 2 80 56 81
12190 ow 76 54 87 12198 9) 79 52 83
12191 ou 81 55 89 12201 9 82 52 85
12192 fol 86 56 88 12204 2 82 52 86
12196 rofl 86 53 90 12208 2 87 57 90
12199 fo 81 56 87 12209 2 79 56 87
12200 fol 84 53 87 12210 2 84 i 88
12202 ol 80 52 85 12212 9 82 52 82
12203 fof 86 52 84 12218 2 81 54 83
12205 foil 88 52 91 12219 ie) 81 St 81
12206 a 87 BS} 88 12220 ie) 80 te
12207 fou 83 53 84 12225 so} 87 50 84
12217 rofl 80 47 84 12226 2 82 54 87
12221 fou 79 53 86 12227 2 83 51 80
12222 fof 85 54 84 12228 e) 82 50 81
12223 fo 83 54 86 12229 9 88 50 67
12224 fou 82 51 87 12230 9 80 52 86
12235 ofl 81 47 82 12231 ie) 85 Si/ 84
12239 ort 78 45 80 12232 2 79 51 79
12241 fol 83 54 85 12233 2 82 54 86
12243 rol 83 oe 86 12234 2 80 51 78
12245 rol 89 53 80 12236 te) 81 53 85
12248 fou 81 51 83 12237 ie) 80 50 84
12251 fom 84 52 83 12238 9 80 50 81
12254 rol 82 52 86 12240 2 79 54 87
12257 ofl 84 44 82 12242 2 81 54 86
12258 fol 83 46 82 12244 9 81 51 80
12246 2 81 52 88
12247 2 80 54 87
12249 9 76 51 80
12250 9 80 53 79
12252 9 81 53 78
12253 2 79 54 80
12256 2 77 52 82
12259 2 84 58 84
12260 2 80 si) 88
Habits —Duncan Island, Dec. 11 to 16, 1905. Lizards were
fairly common in the brushy portion. I have not been in the
September 17, 1913
150 CALIFORNIA ACADEMY OF SCIENCES [Proc. 47H Srr.
crater as yet, but Mr. Beck says they were not more abundant
there than elsewhere. Aug. 14, 1906. Went ashore after
lizards. I found them by no means abundant—if anything
rather scarce. I collected on the N.E. slope of the island to
about 800 feet. The Tropiduri are very wild, and keep close
under cover. They generally were found under the thorn
bushes or on piles of old lava, under which they get on one’s
approach. Secured about thirty during the day. Aug. 15.
Went down into the large crater at the north end of the island.
The floor of the crater is 450 feet above sea-level and is com-
posed of red loam covered with large thorn bushes and old
stumps. The vegetation is thickest around the edges, while
the central portion is almost bare. Lizards were the only
reptiles seen, and were more plentiful there than elsewhere,
but by no means abundant. The numerous hawks make them
wilder than those of any other island where we have collected,
except Charles Island. Some of the males have a rich salmon
coloring, but I find little or no difference between those taken
in the crater and those taken outside, although the color of
their surroundings in the crater is quite red. In several stom-
achs examined I found portions of beetle wings and grass-
hoppers. The latter seem to form one of the principal articles
of food, for T saw several lizards chasing them. I saw quite
a number of young, and presume the breeding season has not
been over very long.
“Their food consists exclusively of insects. The stomachs
examined contained grasshoppers, caterpillars, grubs, beetles,
etc.” (Heller.) ;
General remarks.—The small size of its scales causes this
species to bear a general resemblance to the Tropidurus of
Abingdon Island. The coloration, however, is very different:
the Duncan lizards are the reddest of the Tropiduri, while the
Abingdon species is of a bluish-gray tone. The Duncan lizard
does not show the speckled head so characteristic of the
Abingdon form. The scales on the belly of Duncan specimens
are smaller than in any other species.
Tropidurus habelii (Steindachner)
Bindloe Island Lizard
1876, Tropidurus pacificus (var. habelii), STEINDACHNER, Festschrift
Zool.-Bot. Ges. Wien, 1876, p. 314, pl. II, fig. 2 (type locality Inde-
fatigable [?] and Bindloe Islands, Galapagos Archipelago).
Vor. II, Pr. 1] VAN DENBURGH—SLEVIN—GALAPAGOAN LIZARDS 151
1877, Liocephalus pacificus, GUNTHER, Proc. Zool. Soc. Lond., 1877, p.
67 (part).
1890, Tropidurus pacificus, Baur, Biol. Centralbl., X, 1890, p. 479;
BouLencer, Ann. and Mag. Nat. Hist., (6), VII, 1891, p. 501 (part).
1892, Tropidurus habelii, Baur, Festschrift fiir Leuckart, 1892, p. 271;
Hetter, Proc. Washington Acad. Sci. V. 1903, p. 81.
Diagnosis.—Neck folds fewer, sides of neck covered with
scales instead of granules; more than 65 scales around mid-
dle of body; no light longitudinal dorsolateral stripes; no red
in coloration; dorsal crest in males higher than in any other
race.
Types.—Vientna Museum. Collected by Dr. Habel on “In-
defatigable [ ?] and Bindloe Islands,” Galapagos Archipelago.
Distribution.—This species is peculiar to Bindloe Island,
Galapagos Archipelago.
Material—The Academy’s collection contains about one
hundred and seventy-three specimens, of which forty males
‘and seventy-five females have been included in the table of
scale counts.
Description of adult male No. 12397.—The head is covered above with
smooth scales; interparietal largest, broader than long; five or six large
supraoculars; superciliaries imbricate; five superior and five inferior
labials, to below middle of eye; rostral very broad and low; symphyseal
broad, followed by a series of large sublabials, of which all but the first
are separated from the infralabials by a row of smaller plates. Ear-
opening large, with an anterior denticulation of five or six long, narrow
scales. Side of neck between ear-opening and fore limb with compara-
tively few folds, covered with keeled, imbricate scales. A strong ante-
humeral, but no complete gular, fold. A well-developed median dorsal
crest begins about half the length of the interparietal behind this plate,
and runs continuously to and along the tail, being highest on the proximal
fourth of the tail. The dorsal regions of the neck, body, and tail are
covered with rather small, keeled, mucronate scales, which, on the body,
change gradually to smaller, keeled, mucronate laterals. These again
change gradually into the smooth ventrals, which are a little smaller than
the dorsals. The gular scales are smooth, smaller posteriorly, smallest
below the ears. The scales on the chest are largest, smooth and imbri-
cate. The limbs are provided above with keeled, and below with smooth,
scales. The posterior surface of the thigh is covered with rather small
scales. The lateral caudals are strongly keeled and mucronate, while the
inferior caudals are smooth proximally, but become keeled on the distal
portion of the tail.
The general coloration in alcohol is grayish brown, with little evidence
of darker markings except a black blotch in front of the shoulder. The
posterior gular region is darker. The head, neck, body, limbs, and tail
are very slightly specked with light bluish gray, but there is no band of
the same color along the medium dorsal region. The hind limbs are not
distinctly spotted with black. The lower surfaces are yellowish white
more or less suffused with brown.
152 CALIFORNIA ACADEMY OF SCIENCES (Proc. 47H Ser.
DenothetOwans. or mcirecris species stake eictetetentert mm. 111
Lengthiotctailitanacaceteocrie snes alerericicers 140+
Sniotit: to ear ic. icisias, so ctectelels ois Gretel +; ocrsteieloiersrs 23
Wiaidthtots heads 1:5 teccaciese |: cto sieteccieeventee 18
one, linn bay cpsstoravav ove neaiaiapeveters istalows orarolerstea stats 48
Etinid) thimb: esc sca mee cme sierrctacreieemectne 81
Base of fifth to end of fourth toe ......... 31
Height of crest Onunapeinarace + scisese cic 5
Height of crest on midbody ............... 4
Heishtaot icrestionitall. weaisoctneteicatscincnetete 5
Coloration in life of adult male——Above dark brown,
spotted with light gray; crest grayish; tail and nape olive
brown; limbs above lighter, more spotted; top of head olive
brown. Belly grayish; breast red with dark blotches; throat
and lower jaw also dark, but with more red than the breast.
Sides of body and neck lake red; a black antehumeral spot.
Coloration in life of adult female-——Above dusky greenish
spotted with black, becoming dusky on the tail, and brown on
the head; limbs above with much light olive. Sides of body
dark lake red, chest lighter red; lower jaw and throat dark,
like the sides. Belly and limbs below clay yellow; tail ~
inferiorly dusky yellow. Sides of head light brown; sides of
neck dark red like throat; a black antehumeral spot.
Variation—Males may have the throat quite light, but it
usually is dark, and this coloring extends down over the un-
der surface of the shoulders. Females have light or dark
gray throats, sometimes with a slight showing of red. The
dark coloring of the back may extend down on the lower sur-
faces of the body and limbs, so that these surfaces may be
everywhere dark gray, or may show only a little gray.
The interoccipital is as wide as long. Variation in the scale
counts is shown in the following table:
TABLE OF SCALE COUNTS—BINDLOE ISLAND
Scale Scale
Number Sex | Rows | Crest | Belly Number Sex | Rows | Crest | Belly
12275 ofl eo) 49 75 12282 ie) 71 50 69
12277 fot 74 on 75 12287 e) 68 47 71
12278 ou 71 54 78 12298 2 73 50 74
12279 rol 69 47 75 12305 ie) 70 3 72
12280 fofy 75 51 76 12306 2 68 50 70
12284 fo 70 SL 77 12307 2 68 46 72
12285 of 70 46 74 12308 2 73 50 70
12288 rofl 66 49 75 12311 °) 73 47 74
12291 fol 68 47 71 12312 io) 71 51 71
12293 fou 73 52 80 12313 ie) 70 45 73
12295 fof 72 Si 76 12314 ke} 72 23 76
Vor. II, Ptr. 1] VAN DENBURGH—SLEVIN—GALAPAGOAN LIZARDS
TABLE OF SCALE COUNTS—BINDLOE ISLAND—Continued
153
Number
12297
12304
12317
12318
12323
12325
12327
12333
12337
12350
12353
12354
12362
12374
12380
12383
12384
12385
12389
12390
12395
12397
12402
12419
12420
12427
12429
12430
12435
Scale
Scale
Sex | Rows | Crest | Belly Number Sex | Rows | Crest Belly
fof 66 49 75 12315 9 70 47 76
Ci 66 48 76 12316 ie) 75 55 77
fof) 70 52 76 12319 ie} 71 49 73
fou 70 50 73 12320 io) 72 49 73
a 70 51 76 12321 9 72 46 75
o 70 49 74 12322 g 68 48 75
fol 70 49 76 12324 io) 68 46 72
el 70 52 75 12326 ie) 74 48 71
of 67 46 73 12328 9 70 on 70
foil 70 50 73 12329 °) 69 50 72
fol 71 48 72 12330 9 70 50 ae
fof 71 47 74 12331 2 75 48 70
fol 72 50 75 12332 io) 67 43 ha)
o 72 49 77 12334 io) 69 52 76
(ofl 75 50 78 12335 2 71 45 74
a 69 49 80 12338 °) 70 47 71
a 69 47 78 12339 ie) 68 50 76
fof 74 46 70 12340 2 68 48 72
a 69 51 71 12341 ie) 69 48 72
fol 72 47 70 12342 is) 67 43 74
on 75 48 78 12343 ie) 68 48 71
fol 72 46 74 12344 °) 67 51 69
ol 71 53 74 12345 Q 69 47 69
Ct 70 47 71 12346 2 68 49 71
fo 70 51 77 12348 2 69 50 76
of 71 52 73 12349 2 68 50 68
fos 68 53 80 12351 9 70 47 70
os 69 46 76 12358 ie) 68 51 72
Ct 71 51 74 12361 io) 67 51 i
12363 fe) 69 45 73
12365 ie) 68 48 70
12367 ie} 68 47 69
12373 °) 69 45 68
12375 ie) 66 50 70
12376 ie) 70 46 71
12377 9 69 53 75
12378 °) 71 53 76
12381 ie) 67 52 71
12387 2 68 47 72
12388 2 68 48 69
12393 ie) 69 47 68
12394 ie) 68 45 70
12396 ie) 70 50 73
12398 °) 67 51 72
12400 2 73 49 (SS
12401 2 71 44 74
12403 te} 69 49 74
12404 2 70 48 74
12406 2 71 $2 74
12407 2 75 49 72
12408 io) 71 48 73
12409 2 70 whe 75
12410 ie) 74 51 75
12412 ie) 71 50 76
12413 2 72 48 74
12414 2 73 54 76
154 CALIFORNIA ACADEMY OF SCIENCES [Proc. 4TH Ser.
TABLE OF SCALE COUNTS—BINDLOE ISLAND—Continued
Scale
Number | Sex | Rows | Crest | Belly
12415 2 75 50 75
12417 ie) 69 50 75
12418 s) 7A 49 73
12421 °) 72 50 tM
12422 °) 71 46 77
12423 ie) 68 49 71
12424 ie) 74 48 77
12432 2 da 48 71
Habits.—Bindloe Island, Sept. 17, 1906. We rowed down
the coast about a mile to where the brush came down to the
beach, and then worked inland toward the rim of the crater.
Near the coast the ground is black ashes covered with low
brush and a few small trees. Farther inland the brush be-
comes very thick, and cactus appears. About one mile inland
we found the lizards abundant all through the brush. They
keep well under cover, and rarely come into the open. The
numerous hawks make them very wild. They are all dark in
color, the males being about the color of the black ashes.
Some have a very prominent dorsal crest. The stomachs of
several examined contained vegetable matter. Insects seem
to be scarce; sprouts and green leaves, though not particularly
plentiful, form their principal articles of diet. The ovaries of
several females were well developed. King worked along the
rocks near the water, and found Tropiduri abundant. They
seem to range over the rocks along the coast. The belt near
the shore where the brush is not thick seems to be deserted.
Beginning a mile inland, one finds them again, and they range
thence to the top of the island.
Their ‘‘food appears to be wholly vegetable. All stomachs
examined contained blossoms, seed-capsules, and_ berries.”
( Heller.)
General remarks.—This is one of the larger species. The
males have higher crests than found in any other of the Gala-
pagos Tropiduri, and show fewer black markings. The crests
of the females are much lower. The sides of the neck are
covered with imbricate scales, as in the case of the Chatham
Island lizard.
Vou. I, Pr. 1] VAN DENBURGH—SLEVIN—GALAPAGOAN LIZARDS 155
Tropidurus bivittatus (Peters)
Chatham Island Lizard
1843, Leiocephalus grayii, Bett, Zool, Beagle Rept., 1843, p. 24 (part);
Gray, Cat. Lizards, 1844, p. 218 (part) ; GUntHER, Proc. Zool. Soc. Lond.,
1877, p. 67 (part).
1871, Craniopeltis bivittata, Peters, Mon. Berlin. Acad., 1871, p. 645
(type locality Chatham Island, Galapagos Archipelago).
1876. Tropidurus (Craniopeltis) grayii, STEINDACHNER, Festschrift
Zool.-Bot. Ges. Wien, 1876, p. 310 (part).
1885, Tropidurus grayi, BouLencrr, Cat. Lizards, II, 1885, p. 172.
1889, Tropidurus lemniscatus, Cope, Proc. U. S. Nat. Mus., XII, 1889,
p. 145 (type locality Chatham Island, Galapagos Archipelago); Baur,
Biol. Centralbl., X, 1890, pp. 478, 479.
1891, Tropidurus bivittatus, BouLENGER, Ann. and Mag. Nat. Mus., (6),
VII, 1891, p. 501; Baur, Festschrift fiir Leuckart, 1902, p. 272; HELLER,
Proc. Washington Acad. Sci., V. 1903, p. 80.
Diagnosis—Neck with fewer folds, sides of neck covered
with scales instead of granules; not more than 65 scales around
middle of body; males longitudinally striped; no red in
coloration; crest of males not very high.
Types.—The material upon which Peters based his descrip-
tion of Craniopeltis bivittata was secured on Chatham Island
by Dr. Kingberg, in 1852, and probably is in the Museum of
Stockholm. Cope’s Tropidurus lemniscatus was described
from specimens collected by the naturalists of the “Albatross,”
in 1887-88, upon Chatham Island. These specimens are now
Nos. 14945 to 14964 of the U. S. National Museum collection.
Distribution.—This species is restricted to Chatham Island,
Galapagos Archipelago.
Material—The Academy’s collection contains about two
hundred and eighty specimens of this species, of which
seventy-three males and forty-two females have been included
in the table of scale counts.
Description of adult male No. 9920.—The head is covered above with
smooth scales; interparietal largest, broader than long; five or six large
supraoculars; superciliaries imbricate; four superior and five inferior
labials, to below the middle of the eye; rostral very broad and low;
symphyseal broad, followed by a series of large sublabials, of which all
but the first are separated from the infralabials by a row of smaller
plates. Ear-opening large, with an anterior denticulation of five or six
narrow scales. Side of neck between ear-opening and fore limb with
few folds, covered with keeled, imbricate scales. Strong antehumeral, but
no complete gular, fold. A well-developed median dorsal crest begins a
short distance behind the interparietal, and runs continuously to and along
the tail, being highest on the proximal fourth of the tail. The dorsal
regions of the neck, body, and tail are covered with keeled, mucronate
scales, which, on the body, change gradually to smaller, keeled, mucro-
nate laterals. These again change gradually into the smooth ventrals,
which are much smaller than the dorsals. The gular scales are smooth,
156 CALIFORNIA ACADEMY OF SCIENCES [Proc. 4TH Ser.
smaller posteriorly, smallest centrally. The scales on the chest are about
as large as the dorsals, smooth and imbricate. The limbs are provided
above with keeled scales, and below, except on the forearms, hands, and
feet, with smooth scales. The posterior surface of the thigh is covered
with smooth imbricate scales. The lateral caudals are strongly keeled and
mucronate; while the inferior caudals are smooth proximally, but become
keeled on the distal portion of the tail.
The general coloration in alcohol is brown, with a very dis-
tinct greenish-yellow dorsolateral light stripe, and a somewhat less dis-
tinct lateral stripe, along each side of the body. There are slight indica-
tions of darker brown cross-bars. The head, limbs, and tail are brown,
unicolor or with a few small light spots. The lower surfaces are white
clouded with brown on the chin, throat, and limbs. There is a black
antehumeral blotch. Females lack the light longitudinal streaks.
Length tO anus, sang oc sakes cindelie ss sereaeree mm. 79
Mengeth iota tail” & ge. c.ecaspisisotecuetieres seco AZZ
SnOUE HOMEaAT «ole Reps sais wiere-sjavosis were, slo le e clevels 17
Wridth®of head. v2.astccul sh scree dates le stoveretis 14
Bore; Wm): 2 dees cwaceactiow neues minis cayenne 36
Dita cl tra by = svaase-c ayaledeceveraves aha usta steletets soleloteistehe 60
Base of fifth to end of fourth toe .......... 22
Height ‘of, crest On) Tape) <jeic « ciecsie sieveis s.sieiete.cte 1.5
Height of crest on midbody ............... 1
Hleisht, of crest On tail” Sectace ste cere se cey-re 18
Coloration in life of adult male-—Above olive brown, top
of head darker brown; a light stripe two and one-half scales
wide beginning behind the eye, running slightly upward above
the ear and along the sides to the base of the tail; a narrow
stripe of the same color beginning at the axilla and extending
along sides to base of thigh. Belly yellowish, red-tinged ;
breast, tail, and hind limbs below soiled whitish or grayish;
throat and lower jaw the same; sides of head grayish; sides
of body below the lateral stripes barred yellow and brick red;
a black antehumeral spot. Limbs above spotted with brown
and gray; tail posteriorly light brown.
Coloration in life of adult female-——Above golden brown,
darker on top of head and along base of dorsal crest; limbs
above like the back. Sides of head brownish; sides of throat
and body bright brick red; a slaty antehumeral spot with
black center. Belly and inferior surfaces of limbs cream; tail
yellowish below. Chin greenish; rest of lower jaw, throat,
and breast buffy. Eyelids dark blue-green.
Variation.—The females agree in the faintness or absence
of the light dorsolateral band, which is so characteristic of the
males of this species. They also lack the black blotch in front
of the arm, which the males constantly show except when
young. The dark cross-lines on the sublabial region may be
indistinct or absent.
Vor. II, Ptr. I] VAN DENBURGH—SLEVIN—GALAPAGOAN LIZARDS 57
The interoccipital plate is wider than long. The crests are
higher in males than in females, and increase in height with
age. The scale counts are given in the following table:
TABLE OF SCALE COUNTS—CHATHAM ISLAND
Scale Scale
Number Sex | Rows | Crest | Belly Number | Sex | Rows | Crest | Belly
9916 of 59 44 70 9866 ie) 55 46 tS
9919 fol 58 44 71 9867 ie) 60 49 fal
9920 fol 63 46 73 9868 9 62 46 74
9922 of 54 47 64 9869 12} 56 47 76
9923 fof 61 50 75 9870 io) 58 50 71
9924 of 60 46 72 9871 ce) 53 44 72
9925 rol 57 47 70 9872 e) 58 50 71
9926 fou 58 45 75 9882 2 58 46 73
9927 fos 63 42 71 9900 Q 56 47 73
9928 ou 57 52 iW 9901 2 54 Se 73
9929 ol 64 44 77 9902 ie) 53 ss 67
9930 fol 62 47 70 9903 2 58 45 74
9931 fou 60 44 70 9904 2 Si 51 73
9932 fou 56 47 72 9905 ©) 55 49 70
9934 fou Si 45 71 9917 2 59 44 67
9935 fo 59 45 72 9918 g 56 48 73
9936 fou 59 45 71 9921 °) 57 51 75
9938 (of 60 43 72 9943 °) 62 50 73
9939 fou 58 45 71 9944 2 53 44 70
9940 a 58 45 71 9946 iS) 58 50 70
9941 fof 58 45 67 9956 g 61 45 66
9942 fou 59 46 68 9969 ie) 56 48 73
9949 ros 54 42 67 9971 2 57 45 69
9951 fof 58 43 70 10005 o) 55 47 70
9952 fou 59 45 67 10006 io) 58 50 72
9953 fof 62 41 73 11022 g 61 49 &
9954 fof 59 42 67 11023 io) 58 50 75
9955 fol 58 42 73 11024 °) 61 49 68
9958 ol 57 50 72 11028 g 60 $1 69
9959 fos 58 47 71 11032 g 60 50 72
11025 of 55 48 ii 11037 g 60 52 75
11026 fol 56 46 71 11038 °) 60 47 73
11027 fol 56 47 70 11041 fe) 55 49 67
11029 fou 57 47 74 11047 2 58 50 74
11030 fol 58 46 74 11050 °) 57 47 71
11031 fof 58 44 70 11971 2 59 46 75
11033 fof 61 45 68 11972 9 57 47 us}
11034 fou 62 44 77 11978 2 61 45 74
11035 a 56 47 62 11979 io) 57 47 72
11036 Cf 58 48 69 11980 9 56 42 69
11042 (of 59 48 67 11985 2 61 42 13
11043 fou 56 50 1B 11988 2 59 50 75
11044 fos 57 43 68
11045 Cf 57 45 72
11046 fol 53 42 67
11048 fol 55 48 62
11049 rofl 58 48 70
11955 fol 64 49 72
11956 fof 58 39 70
11958 fol 59 45 71
158 CALIFORNIA ACADEMY OF SCIENCES [Proc. 47H Ser.
TABLE OF SCALE COUNTS—CHATHAM ISLAND—Continued
Scale
Number Sex | Rows | Crest Belly
11959 rol 63 45 69
11960 fou 62 45 68
11961 fou 62 42 69
11962 on 63 47 74
11964 of 59 46 74
11965 fof 63 48 75
11966 fof 56 41 62
11967 rofl 57 47 66
11968 rol 60 40 67
11969 rol 61 44 73
11970 fot 64 45 71
11973 of 63 42 72
11974 ofl 57 42 68
11975 rou 58 43 (fl
11976 fof 59 50 73
11977 foul 53 45 67
11981 (oh 59 45 75
11982 J 63 44 73
11983 of, 61 47 73
11984 (ot 60 45 74
11986 fot 59 44 72
11987 oO 61 43 70
11989 toy 56 47 75
Habits—Chatham Island, Oct. 16, 1905. I went ashore at
Wreck Bay, and worked near the coast. Tropiduri were fairly
common. I found one (No. 1355) with a piece of crab’s leg
in its mouth, and another (No. 1380) with a large worm. A
great many were small, and I saw no very large ones. Jan.
15, 1906. Saw several Tropiduri shedding their skins. The
females contain eggs now in January. Jan. 29. Went to the.
top of Chatham Island. The soil is damp, and no reptiles were
observed. Beyond a mile from the shore no Tropiduri are to
be seen. Feb. 8. Went ashore at Fresh Water Bay, and
worked up to about 1000 feet. I saw only six lizards, all very
wild, probably owing to the presence of numerous cats, of
which we saw many signs. I suppose the highest altitude at
which the lizards were observed was 600 feet. Feb. 10. Went
ashore at Sappho Cove and worked inland. Lizards are very
scarce. Feb. 23. Went collecting at Wreck Bay, and got
only a few Tropiduri and geckos. The lizards seem to be
fewer in number at this season. One female was obtained
with large eggs. July 5. Went up to the road at Wreck Bay
collecting. Find the lizards rare now, and most of them are
very small. The island is very dry now, it being the winter
Vou. II, Pt. 1] VAN DENBURGH—SLEVIN—GALAPAGOAN LIZARDS 159
season, and the natives report having had no rain for some
time.
General remarks.—The Chatham Island Tropidurus is one
of the smaller species. The males are very prettily striped,
while the females are nearly unicolor. The crest is moderately
well developed in the males, low in the females. This species
agrees with the Bindloe lizard in having scales instead of
granules on the sides of the neck, a character which distin-
guishes these two species from all the other species of the
archipelago.
Tropidurus delanonis Baur
Hood Island Lizard
1889, Tropidurus grayi, Cope, Proc. U. S. Nat. Mus., XII, 1889, p. 145
(part); BouLencer, Ann. and Mag. Nat. Hist. (6), VII, 1891, p. 502
eee. Tropidurus delanonis, Baur, Biol. Centralbl., X, 1890, pp. 478,
479 (type locality Hood Island, Galapagos Archipelago); Baur, Fest-
schrift fiir Leuckart, 1892, p. 270; Hetter, Proc. Washington Acad. Sci.,
V, 1903, p. 78.
1890, Tropidurus hoodensis, Baur, reprints from Biol. Centralbl., X,
1890, pp. 478, 479 (substituting name); Baur, Festschrift fiir Leuckart,
1892, pp. 265, 270.
Diagnosis —Sides of neck with numerous folds; skin be-
tween folds covered with granules, some small scales on ridges
of folds of large males; hind legs of males with definite dark
spots; interparietal plate seldom much broader than long; not
more than eighty scales around middle of body; 50 to 61
scales in crest; back not definitely spotted as in T. grayi;
much red in coloration; old males larger than in other
species.
Types.—This species was described by Dr. Baur from thir-
teen specimens, numbered 15014 to 15026 of the U. S. Na-
tional Museum collection, which had been secured on Hood
Island by the naturalists of the “Albatross,” in April, 1888.
Distribution—This species has been found only on Hood
Island and Gardner-near-Hood, Galapagos Archipelago.
Material—The Academy’s collection contains about two
hundred and forty specimens from Hood, and twenty-three
from Gardner ; of which seventy males and sixty-eight females
from Hood, and seven males and six females from Gardner
have been included in the tables of scale counts.
Description of adult male No. 11802.—The head is covered above with
smooth scales; interparietal largest, little if any broader than long; five
to seven large supraoculars; superciliaries imbricate; five superior and
160 CALIFORNIA ACADEMY OF SCIENCES [Proc. 4TH Ser.
five inferior labials, to below middle of the eye; rostral very broad and
low; symphyseal broad, followed by a series of large sublabials, of which
all but the first are separated from the infralabials by a row of smaller
plates. Ear-opening large, with an anterior denticulation of five or six
long, narrow scales. Side of neck between ear-opening and fore limb
with numerous folds, mostly covered with granular scales. A _ strong
antehumeral, but no complete gular, fold. A well-developed median
dorsal crest begins a short distance behind the interparietal plate, and runs
continuously to and along the tail, being highest on the proximal fourth
of the tail. The dorsal regions of the neck, body, and tail are covered
with keeled, mucronate scales, which, on the body, change gradually to
smaller, keeled, mucronate laterals. These again change gradually into
the smooth ventrals, which are considerably smaller than the dorsals.
The gular scales are smooth, smaller posteriorly, smallest below the ears.
The scales on the chest are largest, smooth, and imbricate. The limbs
are provided above with keeled, and below with smooth, scales. The
posterior surface of the thigh is covered with smooth sub-granular scales,
between which smaller granules may often be seen. The lateral caudals
are strongly keeled and mucronate; while the inferior caudals are smooth
proximally, but become keeled on the distal portion of the tail.
The coloration in alcohol is olive brown above, spotted, except on the
head and tail, with small, rounded, discrete blackish spots, each covering
one or more scales. The chin is grayish slate. The gular region and
chest are black. The other lower surfaces are grayish yellow.
Tength! tO) @nuS. oss ci6<carsiesis seisors 201s sciensravals mm. 137
Rength. of tail, oiis!s ca secsiiacins owe sincctess ee 163+
Sout tocar an Scns ese <4 oasittactongyee eee 16
Wridthson head! sitar cence cemnctiees ote 21
Hore LmMbi 5. isveigncdoaenesamienn sii aseeetes 54
EAT evastys. acrosome ine enere eee cere 85
Base of fifth to end of fourth toe ......... : 30
Height of crest Om nape ...assns ce «assests 1.5
Height of crest on midbody ............... 1
Heizhtor icrest On tail 22 cc slastwictsace-ceisters Avene)
Coloration in life of adult male—Above olive brown,
spotted, except the head, with light yellowish; tail dark red-
dish, the crest light brown; hind limbs reddish, light-spotted
distally ; fore limbs like the sides ‘of fhe body. Belly medially,
and hind limbs and tail inferiorly, dusky-yellow; the belly
anteriorly and laterally red. Mandible dark greenish gray,
throat black, chest black with large straw-yellow blotches.
Fore limbs below proximally like the breast. Sides of head
and neck light brown with black blotches; sides of body red-
dish, spotted with light yellow; tail brick red on the sides.
Coloration in life of adult female-—Body and tail above
olive brown; limbs similar in coloration. Sides of belly and
tail reddish; a black antehumeral spot. Whole head, throat,
and chest brick red, becoming darker on nape and top of
head, fading to dull orange on anterior belly; belly and tail
and hind limbs inferiorly cream yellow; fore limbs below
proximally like the breast.
Vor. II, Pr. 1] VAN DENBURGH—SLEVIN—GALAPAGOAN LIZARDS 161
Variation.—The two sexes from this island differ more
than in other species; but there is little variation among the
females, and still less among the males. The females all agree
in having the black blotch in front of the shoulder and brick
red coloring of the throat, which in some specimens extends
down to the under surface of the shoulders. The males show
little or no variation. Some specimens show red on the sides
and the under surface of the tail. They all agree in the black
throat and scattered black markings extending down past the
shoulders. Specimens from Gardiner-near-Hood are like
those from Hood. A few females taken there show a darker
red, but this is not constant.
The interoccipital usually is as long as wide, but in a few
specimens is wider than long. Scale counts are shown in the
following table:
TABLE OF SCALE COUNTS—Hoop ISLAND
Scale Scale
Number Sex | Rows | Crest | Belly Number | Sex | Rows | Crest Belly
9252 rofl 67 54 77 9250 9 76 60 85
9254 Cf 71 $1 81 9322 S) 68 51 78
9256 fo 69 53 77 9330 g 70 53 74
9257 fof 70 56 82 10888 9 71 54 73
9258 fol 69 51 77 10889 © 73 57 79
9259 fol 69 55 77 10890 2 71 56 81
9260 fol 68 55 80 10892 °) 73 54 77
9261 fol 67 60 84 10894 2 71 57 79
9262 fof 70 59 81 10895 2 72 54 78
9264 of 70 52 79 10896 g 69 56 73
9265 ot! 69 60 83 10900 ie) 69 53 76
9266 rofl 72 56 77 10903 te) 70 56 83
9267 fof 69 56 78 10904 °) 69 54 73
9268 ou 69 $1 81 10905 °) 69 53 78
9310 fol 69 55 85 10906 io) 70 55 83
9311 ofl 67 52 78 10908 g 73 59 71
9312 fof 69 55 74 10909 2 76 57 79
9317 cor 67 51 80 10910 ©) 70 53 79
9318 fof 74 60 79 10913 9 77 58 75
9319 fou 13 58 77 10914 ie) 70 56 79
9324 fol 68 55 80 10915 9 70 54 75
9325 fol 67 52 84 11829 9 70 61 74
9326 fof 71 51 81 11830 io) 66 55 76
9327 fof 67 BS) 79 11831 2 70 54 78
10886 fol 64 56 82 11832 is) 71 53 79
10887 fof 76 51 83 11833 ie) 73 56 84
10891 fof 68 57 81 11834 te) 68 Sik 74
10893 rofl 69 52 78 11835 ce) 74 55 77
10897 fou 74 ol 83 11836 ce) 76 55 80
10898 fol 69 57 82 11837 ie) 76 57 74
10899 fof 72 53 78 11838 2 75 57 78
10901 fol 68 58 81 11839 io) 69 56 78
162
CALIFORNIA ACADEMY OF SCIENCES [Proc. 4TH Ser.
TABLE OF SCALE COUNTS—Hoop IsLaND—Continued
Scale Scale
Number Sex | Rows | Crest | Belly Number | Sex | Rows |Crest Belly
10902 fol 72 Si 86 11843 2 70 58 83
10907 rol 71 52 79 11844 2 72 57 76
10911 fof 70 54 81 11845 2 73 56 79
10912 a 68 58 83 11846 2 66 57 75
10916 rol 70 te 78 11847 2 71 58 86
10917 ros 69 57 76 11848 ° 69 on 77
10918 of 71 56 81 11850 © 78 59 86
11798 fol 69 55 73 11852 iS) 69 61 81
11801 fol 67 51 77 11854 2 76 61 83
11802 rol 68 52 75 11855 g 66 52 76
11804 lof 71 55 75 11859 2 72 58 82
11805 fof 72 52 67 11860 9 69 59 80
11806 ou 70 54 iD 11861 g 77 Si 83
11807 rol 76 61 81 11862 2 68 51 74
11808 rol 72 53 78 11863 ie) 68 oD 80
11810 rol 76 50 80 11864 g 69 57 74
11811 fol 71 57 15 11865 °) 76 54 82
11812 rol 70 54 73 11866 ) 72 57 78
11813 (oh 70 50 70 11867 ie) 72 58 76
11816 fof 68 51 76 11868 2 70 ay 84
11817 fol 69 52 75 11869 9 73 54 80
11820 fou 67 54 73 11870 2
11821 fou 68 51 76 11872 9 71 58 78
11824 fol 74 56 76 11873 9) 72 57 75
11825 rofl 67 53 73 11874 2 72 53 71
11826 fou 69 55 80 11878 2 76 56 74
11827 fou 71 52 79 11881 g
11828 of! 70 57 76 11882 g
11900 fof 74 58 80 11883 iS) 72 54 82
11902 rofl 72 56 79 11884 Q 71 56 74
11904 fos 1) 50 76 11885 te) 78 61 83
11905 rofl a 52 72 11888 ie) 70 56 Ui
11906 fot 70 fl 77 11889 iS) 73 55 79
11907 fot 70 53 80 11890 io) 70 57 82
11908 fou 68 55 77 11891 2 78 57 80
11909 rol 73 ye 80 11894 ie} 77 57 75
11910 fof 70 51 75
11928 rol 69 54 77
TABLE OF SCALE COUNTS—GARDNER-NEAR-HOOD
Scale Scale
Number Sex | Rows | Crest | Belly Number | Sex | Rows | Crest | Belly
9347 fot 73 So 82 9353 2 76 55
9348 rol 70 56 79 9354 e) 76 62 81
9350 oF 72 §5 84 9356 se) 68 52 83
9351 fof 74 56 83 9359 2 71 60 83
9355 a 71 ie 80 9360 9 73 52 78
9358 rot 73 ts, 82 9363 9) 71 52 83
9361 fol 73 syA 81
Habits—Hood Island, Sept. 25, 1905.
very common. They can be obtained easily with a stick. They
I found the lizards
Vor. II, Pr. 1] VAN DENBURGH—SLEVIN—GALAPAGOAN LIZARDS 163
occurred all through the brush, and sometimes climbed up into
the cactus trees. Although they were scattered everywhere,
I found them more numerous near the beach, in the sand and
brush, than on rocky soil. As a rule, they would stand per-
fectly still and gaze at one, but I noticed a few of the large
males bobbing their heads up and down. Sept. 26. I took
the eggs from a female Tropidurus and preserved them. They
were five in number. These lizards were abundant and ex-
tremely tame. I saw some eating green leaves on the shrubs,
and some would pick up crumbs from our lunch. Feb. 2,
1906. Found the Tropidurus common near the coast, but
none to speak of near the top of the island. The vegetation
is well dried up now, there being only one or two plants in
leaf. I examined the stomachs of six males and one female
Tropidurus, and found that all contained the leaves of a juicy
green shrub that grows along the shore and is common on all
the islands. June 25, 1906. Went down to the albatross
colony and gathered in a few sea-iguanas and lizards. I find
Tropiduri abundant everywhere, and occasionally see them
on top of the cactus trees, where they go probably in search of
insects. They have few enemies; hawks are not very plentiful,
and the only birds that seem to harm them much are the mock-
ing birds (Nesomimus). These can be seen picking at the
lizards’ tails, breaking them off in the middle, and flying away
with the ends.
Gardner-near-Hood, Sept. 27, 1905. Found the Tropiduri
fairly common, but a little more shy than on Hood Island. As
a rule, the females seemed to be a little smaller than those on
Hood, and a little darker under the throat, where the color is
almost chocolate. Feb. 23,1906. Sawa Tropidurus feeding on
maggots on a dead seal, and others eating flies; but they ap-
pear to eat leaves more than anything else.
Heller states that the food of the Hood Island Tropidurus
consists of grasshoppers, beetles, caterpillars, seed-capsules
and berries.
General remarks.—The Hood Island Tropidurus attains a
greater size than is reached by any other species of the archi-
pelago. It seems to be most nearly related to the Charles
164 CALIFORNIA ACADEMY OF SCIENCES [Proc. 4TH Serr.
Island species, but is quite distinct. It is still fairly common.
No difference has been noted between specimens from Hood
Island and those from Gardner-near-Hood. Five eggs taken
from a female on Hood Island, Sept. 26, 1905, measure 12X
20, 13X21, 13X22, 12X23, and 12X24 mm. They have
tough white, non-calcareous shells.
Tropidurus grayii (Bell)
Charles Island Lizard
1843, Leiocephalus grayii, BELL, Zoology Beagle, Rept., 1843, p. 24, pl.
XIII, fig. 1 (part) (type locality Chatham and Charles Islands, Gala-
pagos Archipelago); Gray, Cat. Lizards, 1845, p. 218 (part) ; GUNTHER,
Proc. Zool. Soc. Lond., 1877, p. 67 (part).
? 1851, Holotropis grayii, DumériL, Cat. Méth. Rept., 1851, p. 70
(part) ; Dumérm, Arch. Mus., VIII, p. 538 (part).
1871, Craniopeltis grayii, Peters, Mon. Berl. Acad., 1871, p..645 (part).
1876, Tropidurus (Craniopeltis) grayii, STEINDACHNER, Festschr.
Zool.-Bot. Ges. Wien, 1876, p. 310, pl. II, fig. 1 (part).
1885, Tropidurus grayii, BouLENGcER, Cat. Lizards, II, 1885, p. 172
(part); Cope, Proc. U. S. Nat. Mus., XII, 1889, p. 145 (part); Baur,
Biol. Centralbl., X, 1890, pp. 478, 479; Boutencer, Ann. & Mag. Nat. Hist.,
(6), VII, 1891, p. 502 (part); Baur, Festschrift fiir Leuckart, 1892, p. 265.
1903, Tropidurus grayi grayi, HELLER, Proc. Washington Acad. Sci., V,
1903, p. 69 (part).
Diagnosis.—Sides of neck granular with numerous folds,
hind legs of males with definite dark spots; interparietal plate
seldom much broader than long; not more than eighty scales
around middle of body; 36 to 48 scales in crest; back with
very definite discrete rounded blackish spots; little or no red
in coloration.
Types.—The original specimens were collected by Charles
Darwin in 1835 during the voyage of the “Beagle,” and are
now in the British Museum. They were said to have been
collected in Chatham and Charles islands, but the description
is of the Charles Island species.
Distribution—This species appears to be restricted to
Charles Island and its neighboring islets, Gardner, Champion,
and Enderby.
Material.—Besides the types collected by Darwin, this spe-
cies has been secured only by Kinberg and Dr. Baur. It ap-
pears to be nearly extinct on Charles Island, where Baur col-
lected his specimen. The Academy’s collection contains fif-
Vou, II, Pr. I] VAN DENBURGH—SLEVIN—GALAPAGOAN LIZARDS 165
teen from Charles Island, twenty-seven from Gardner-near-
Charles, sixteen from Champion, and thirty-one from En-
derby. Of these, one male and fourteen females from Charles,
thirteen males and fourteen females from Gardner, seven
males and nine females from Champion, and thirteen males
and eighteen females from Enderby are included in the tables
of scale counts.
Description of adult male No. 9536—The head is covered above with
smooth scales; interparietal largest, broader than long; four or five large
supraoculars ; superciliaries imbricate; five superior and five inferior labials,
to below middle of the eye; rostral very broad and low; symphyseal
broad, followed by a series of large sublabials, of which all but the first
are separated from the infralabials by a row of smaller plates. Ear-
opening large, with an anterior denticulation of five or six long, narrow
scales. Side of neck between ear-opening and fore limb with numerous
folds, covered with granular scales. A strong antehumeral, but no com-
plete gular, fold. A well-developed median dorsal crest begins half the
length of the interparietal behind this plate, and runs continuously to and
along the tail, being highest on the proximal fourth of the tail. The
dorsal regions of the neck, body, and tail are covered with rather small,
keeled, mucronate scales, which, on the body, change gradually to smaller,
keeled, mucronate laterals. These again change gradually into the
smooth ventrals, which are a little smaller than the dorsals. The gular
scales are smooth, smaller posteriorly, smallest below the ears. The scales
on the chest are largest, smooth and imbricate. The limbs are provided
above with keeled, and below with smooth, scales. The posterior surface
of the thigh is covered with keeled, imbricate scales. The lateral caudals
are strongly keeled and mucronate; while the inferior caudals are smooth
proximally, but become keeled on the distal portion of the tail.
The color above is olive brown, unicolor on the top and sides of the
head, but relieved with dark brown or black spots or cross-bars on the
body, limbs, and base of tail. The lower surfaces are greenish white.
The gular region is suffused with dark gray, and the throat and chest
bear discrete, rounded spots of blackish brown.
Mensthetonantisnecvoia scene h ee eee eee mm. 65
Wengthi oti taill ry Sastvse see rete eerie 120
DHOULLEOL car vost a cerevetn pn eee DUR ne 15
Waidthvofvheads ic: hrisas vost aie eee ee 13
Bone limb 1 soiled cuaeraerie cy sore ree eae: 34
ind wlimby ya cqasraccceahe vase elon: 54
Base of fifth to end of fourth toe .......... 21
Mleightvof crest oninape -eesceence seeeacne 1
Height ‘of: crest oni midbody <a. 9-cseiencocs 8
Eleightvos icrestaon tail Seemrenncee cen mers 1:2
Variation.—The lizards of Charles, Champion, Enderby,
and Gardner-near-Charles islands seem to differ in no respect.
The sexes agree in coloration, except that the males have
darker throats and larger dorsal spots. Females may have
either white or grayish throats, spotted with black. The inter-
September 17, 1913
166 CALIFORNIA ACADEMY OF SCIENCES [Proc. 47H Ser.
occipital plate seldom is much wider than long. Variation in
scale counts is shown in the following tables:
TABLE OF SCALE COUNTS—CHARLES ISLAND
Scale Scale
Number Sex | Rows Crest Belly Number Sex | Rows Crest Belly
9536 (of 62 44 73 9533 2 a 66
9534 ©) 64 40 69
9535 2 60 43 67
9537 2 61 41 67
9538 g 60 42 67
9539 2 64 A
9540 g De 42 69
9541 2 62 43 65
9542 2 60 bs 70
9543 Q 60 40 67
11057 2 58 42 70
11058 io) 59 ae 69
11059 io) 62 43 69
11060 °) 60 44 74
TABLE OF SCALE COUNTS—GARDNER-NEAR-CHARLES
Scale Scale
Number Sex | Rows | Crest | Belly Number | Sex | Rows | Crest | Belly
9422 fol 67 38 68 9421 iS; 67 38 67
9423 fof 69 38 68 9424 2 67 45 2
9425 fof 72 38 71 9426 °) 70 43 72
9427 fof 70 44 72 9429 io) 67 42 68
9428 fof 66 38 72 9431 9 69 45 66
9430 rofl 69 42 70 9432 2 67 39 70
9433 fof 69 42 71 9437 io) 63 42 72
9434 fof 67 43 70 9439 2 69 43 73
9435 fof 72 44 71 9440 2 69 41 70
“9436 ou 69 41 72 9441 2 70 44 73
9438 rol 66 41 70 9442 g 69 ae 66
9444 os 70 43 72 9443 2 70 43 66
9445 fou 69 40 70 9446 ie) 69 45 73
9447 2 45 70
TABLE OF SCALE COUNTS—CHAMPION ISLAND
Scale Scale
Number Sex | Rows | Crest Belly Number Sex | Rows | Crest | Belly
9449 fof 67 45 72 9452 2 64 48 76
9450 fot 66 43 73 9455 2) 62 46 74
9451 fof 68 40 73 9456 io) 64 45 72
9453 fof 61 ue 70 9457 io) 62 43 69
9454 fof 65 42 71 9458 g 62 a6 68
9461 fof 63 43 69 9459 so) 62 41 72
11054 fou 62 42 76 9460 2 64 41 75
11055 so) 61 45 71
11056 2 64 43 73
Vor. I, Pt. 1] VAN DENBURGH—SLEVIN—GALAPAGOAN LIZARDS 167
TABLE OF SCALE COUNTS—ENDERBY ISLAND
Scale Scale
Number Sex | Rows Crest Belly Number Sex | Rows | Crest Belly
11601 rol 71 41 68 11605 °) 70 45 75
11602 fol 73 39 77 11615 9 72 44 73
11603 fof 67 43 67 11616 Q 73 46 72
11604 a 69 41 74 11617 ie) 70 43 73
11606 fol 72 40 73 11618 °) 77 41 75
11607 fou 67 36 69 11619 2 74 42 :
11608 fou 72 43 74 11620 2 75 42 73
11609 ou 73 40 73 11621 2 71 43 70
11610 rofl 74 40 75 11622 ie) 73 43 70
11611 rol 65 40 75 11623 ie) 73 44 70
11612 oy 68 40 75 11624 2 68 43 72
11613 fou 70 36 77 11625 ie) 68 40 70
11614 fof! 72 43 75 11626 ie) 69 44 70
11627 ie) 71 42 74
11628 i) 76 43 71
11629 2 67 45 71
11630 g 71 42 70
11631 Q 71 46 70
Habits—Charles Island, Oct. 4, 1905. Went ashore at
Post Office Bay and worked toward the interior. The country
is mountainous, but there are some large spaces of level land.
Found animal life of every description scarce. I did not see
a Tropidurus or a snake the whole day. Saw lots of cat
tracks, so I suppose the lizards have been pretty well cleaned
out, although there are beds of lava where they easily could
escape by going underneath the blocks. Oct. 5. Went ashore
on the northeast end of the island near the lagoon. Got one
Tropidurus, and King got two, on a lava pile. King saw one
more, but could not get it. Ochsner reports seeing one also,
but failed to catch it. These were all that were seen by any
of our party. Oct. 6. Went ashore for half a day at the la-
goon on the northeast end of the island. Had better luck
with the Tropiduri, getting five. They were in a large lava
bed near the lagoon. Oct. 9. Went ashore at Black Beach,
and worked into the interior up to some springs south of the
highest peak. I saw no Tropiduri or snakes. Oct. 10.
Worked up to the top of the crater on the highest mountain,
but saw no reptiles whatever. Tropidurus is extremely rare
on Charles. I have not seen any since we arrived at Black
Beach. Feb. 26, 1906. Went ashore at Cormorant Bay and
collected four Tropiduri. I saw seven altogether, but missed
three on account of defective shells. The particular spot where
168 CALIFORNIA ACADEMY OF SCIENCES [Proc. 4TH Ser.
these lizards were taken is on a lava bed which surrounds the
lagoon. No specimens were seen outside of this. They are
very rare and shy, and at one’s approach go under the lava
and into crevices. Signs of cats are seen everywhere, and they
probably are the principal cause of the scarcity.
Gardner-near-Charles, Oct. 2, 1905. Gardner Island is an
old crater. We landed on the N.W. side, which is the
only one accessible. It is very steep and covered with
broken lava and cactus shrubs. Tropiduri were shy and not
very common. They were found in about the same numbers
from the rocks on the coast to the top of the crater. It was
a bad place to hunt, and we stayed only a couple of hours, but
secured fifteen Tropiduri.
Champion Island, Oct. 3, 1905. We then sailed on to
Champion Island, which is a very small crater and easily got
around. We covered this island in an hour and a half. Tvro-
piduri were scarce here, and were found on the west side,
where all the seals stayed, as there is a little beach there.
There are lots of flies that go on the seals when they sleep on
the beach, and the lizards, therefore, find more food at this
place.
Enderby Island, May 14, 1906. This island is part of the
ruin of an old crater and is composed of tufa. One side is too
steep to work on, so we went only along the top. The only
things seen in the way of reptiles were Tropiduri and a
gecko. The former were fairly common. Thirty-one were
secured in about an hour spent on the island.
Tropidurus albemarlensis barringtonensis (Baur)
Barrington Island Lizard
1892, Tropidurus barringtonensis, BAuR, Festschrift fiir Leuckart, 1892,
p. 268 (type locality Barrington Island, Galapagos Archipelago).
1903, Tropidurus grayi barringtonensis, HELLER, Proc. Washington
Acad. Sci., V, 1903, p. 75.
Diagnosis.—Sides of neck granular, with numerous folds;
hind legs of males without definite dark spots; interparietal
plate usually much broader than long; not more than 76 scales
around middle of body; scales smaller than in T. albemarlensis,
61 to 76 around middle of body.
Type——Dr. Baur’s original description was based upon
thirty-eight specimens of this species from Barrington Island.
Vor. II, Pr. I] VAN DENBURGH—SLEVIN—GALAPAGOAN LIZARDS 169
None of these were designated as types. I have been unable
to learn their present location.
Distribution.—This lizard has been found only on Barring-
ton Island, Galapagos Archipelago.
Material—The Academy’s collection contains one hundred
and fifty-five specimens, of which fifty-seven males and
seventy-four females have been included in the table of scale
counts.
Description of adult male No. 10196.—The head is covered above with
smooth scales; interparietal largest, broader than long; five or six large
supraoculars; superciliaries imbricate; four superior and five inferior
labials, to below middle of eye; rostral very broad and low; symphyseal
broad, followed by a series of large sublabials, of which all but the first
are separated from the infralabials by a row of smaller plates. Ear-
opening large, with an anterior denticulation of four or five long, narrow
scales. Side of neck between ear-opening and fore limb with numerous
folds, covered with granular scales except on tops of folds. A strong
antehumeral, but no complete gular, fold. A well-developed median dorsal
crest begins half the length of the interparietal behind this plate, and runs
continuously to and along the tail, being highest on the proximal fourth of
the tail. The dorsal regions of the neck, body, and tail are covered with
rather small, keeled, mucronate scales, which, on the body, change gradu-
ally to smaller, keeled, mucronate laterals. These again change grad-
ually into the smooth ventrals, which are much smaller than the dorsals.
The gular scales are smooth, smaller posteriorly, smallest below the ears.
The scales on the chest are largest, smooth and imbricate. The
limbs are provided above with keeled, and below with smooth scales. The
posterior surface of the thigh is covered with weakly keeled, imbricate
scales. The lateral caudals are strongly keeled and mucronate; while the
inferior caudals are smooth proximally, but become keeled on the distal
portion of the tail.
The color above is olive brown, somewhat mottled on the top and
sides of the head. The dorsal surfaces of the body, neck, and fore limbs
show numerous dark brown or black spots or cross-bars. The lower sur-
faces are greenish white, lightest on the chin. The gular region is suf-
fused with dark gray, and the throat, chin and chest bear discrete, rounded
spots of blackish brown.
engthe tOranus: ya. cetera oacetrcecweictteterratrcls mm. 95
Bengthivot tails. scnniseasestcheneenitactocnece 113e
Syl edceyt ba nen oe daamennonconcuContpmecccn 20
Whidthwoty head's actaae teeter etnies. © 16
Ore Alittibs ¢ skiasncrcresersye soci cate riee eto 41
aAetacls dasa by’ 2: aseveere cpereponsicuaotereterasverorpelmara acta tees 69
Base of fifth to end of fourth toe .......... 28
Mleteht of icrest oninapenacmciaraemine tieysteicterele 2
Height of crest on midbody ............... 1S
Height of crest om tail’ Sane eeeereniecee ae 28
Coloration in life of adult male—Above light grayish
brown, tail darker grayish; whole upper surface except the
head spotted with blue-gray; the dorsum anteriorly and fore
limbs black-barred and spotted; hind limbs and tail without
dark bars. Head above olive green, grayish on sides and
neck, black-spotted. A black antehumeral spot. Sides of
170 CALIFORNIA ACADEMY OF SCIENCES [Proc. 47H Srp.
body behind the axilla reddish, black-barred and_ spotted;
belly yellowish, spotted with pinkish and dusky on sides;
breast and lower jaw brick red, spotted with black; chin yel-
lowish without darker spots; throat black; fore limbs in-
feriorly red, black-spotted proximally like the breast; tail and
hind limbs below light grayish green.
Coloration in life of adult female-—Above grayish brown,
the dorsum crossed by dusky transverse bars; whole dorsal
surface except head spotted with blue-gray; limbs above
dusky-barred like back; head above olive brown, sides of snout
grayish. Sides of head and neck from the eye to the ante-
humeral spot brick red; sides of body behind the axilla pink-
ish, obsoletely spotted with dusky; a black antehumeral spot.
Belly and inferior surfaces of hind limbs and tail light gray-
ish; breast lemon yellow, spotted with black; throat medially
like the breast, spotted with dark brown; sides of body red-
dish; lower jaw pinkish, spotted with dusky; fore limbs in-
feriorly colored like breast, the forearm unspotted.
Variation.—The black spots on the back tend to form cross-
bars. Females are colored similarly to the males, but the
black dorsal spots usually are somewhat smaller. The throat
may be white with black spots, or may be suffused with gray.
Large males may have some red on the throat; but this is
seen in few specimens, and seems to be always absent in
females. The interoccipital plate is wider than long. Varia-
tion in scale counts appears in the following table:
TABLE OF SCALE COUNTS—BARRINGTON ISLAND
| Scale Scale
Number Sex | Rows | Crest | Belly Number | Sex | Rows | Crest | Belly
10065 Co 67 52 72 10067 2 63 48 76
10066 of 68 48 76 10068 2 67 49 74
10069 fou 66 46 77 10071 ie) 63 50 72
10070 om 65 50 72 10072 S} 67 52 74
10075 ro fy 65 By 77 10073 2 69 51 71
10086 of 63 47 75 10074 2 65 S1 75
10088 ow 71 50 80 10076 2 66 51 72
10093 fot 69 54 78 10077 9 62 45 70
10096 rou 70 52 79 10078 2 63 54 75
10098 fou 65 53 79 10079 io) 71 OZ 73
10102 of 68 50 76 10080 2 64 49 74
10106 of 67 48 78 10081 2 67 49 80
10109 fou 68 52 76 10082 2 61 49 71
10111 of 63 49 74 10083 2 70 48 76
10114 ou 66 48 76 10084 2 67 50 i
10115 fof 62 48 73 10085 2 65 48 76
10117 ou 67 50 fe 10087 2 65 49 76
Vor. II, Pr. I]
VAN DENBURGH—SLEVIN—GALAPAGOAN LIZARDS
171
TABLE OF SCALE COUNTS—BARRINGTON ISLAND—Continued
Scale
Number Sex | Rows | Crest | Belly Number Sex
10119 ofl 70 51 80 10089 g
10120 fol 68 50 80 10090 ie)
10122 icf 68 Se) 79 10091 g
10123 foil 64 49 77 10092 g
10125 fou 65 50 79 10094 2
10127 (of 62 47 76 10095 2
10128 foul 63 51 79 10097 fe}
10130 ou 61 45 73 10099 9
10136 rofl 66 52 76 10100 g
10137 et 63 48 74 10138 °)
10164 rofl 66 48 77 10139 fe)
10166 fou 64 54 77 10140 g
10179 foil 65 48 78 10141 g
10196 fof 66 47 77 10142 g
10197 fol 66 50 75 10143 g
12019 fou 66 51 79 10144 2
12020 rol 66 54 77 10145 g
12025 fof 65 48 73 10148 g
12026 rofl 64 49 79 10149 g
12029 fol 68 48 80 10153 g
12031 Cf 63 48 74 10154 g
12032 fol 72 54 82 10155 ie)
12033 (sf! 68 50 79 10156 g
12034 fof 66 51 77 10157 g
12035 rofl 67 50 78 10158 g
12036 fol 66 51 76 10159 fe)
12037 of) 64 on 72 10160 g
12038 fol (Al 53 78 10161 fe)
12039 (ou 64 48 75 10162 9
12040 fot 66 51 71 10163 fe)
12041 fol 66 51 75 10165 92
12042 foil 62 55 74 10167 fe)
12043 cof! 66 58 73 10168 g
12044 fot 68 52 76 10180 io)
12045 fou 67 51 75 10181 g
12046 rofl 67 47 70 10198 9
12051 fou 63 49 70 10199 2
12052 fol 65 46 73 10200 g
12053 ofl 68 50 78 10201 Q
12054 rofl 65 50 78 10202 g
10203 2
10204 9
10205 g
10206 2
10207 fe}
10208 2)
10209 fe)
10210 2
10211 9
12023 wo)
12024 2
12027 ©)
12030 ie}
12047 9
12048 9)
12049 2
12050 9)
Scale
Rows
Crest
72 CALIFORNIA ACADEMY OF SCIENCES [Proc. 47H SER.
Habits Barrington Island, Oct. 20, 1905. Went ashore
on the N.E. coast, and traveled about a mile to the iguana
colony. Tropiduri were common near the beach, but plentiful
inland. July 9, 1906. Tropiduri seem to be less abundant
now than at the time of our former visit. July 10. Lizards
are fairly abundant and rather wild.
“All stomachs examined contained insects, chiefly Orthop-
tera.” (Heller.)
Tropidurus albemarlensis Baur
Galapagos Lizard
? 1851, Holotropis grayi, DumMéRI, Cat. Méth, Rept., 1851, p. 70 (part) ;
DumeEri, Arch. d’ Mus., VIII, p. 538 (part).
( 1871, Craniopeltis grayti, Peters, Mon. Berlin. Acad., 1871, p. 645
part).
1876, Tropidurus (Craniopeltis) grayii, STEINDACHNER, Festschr.
Zool.-Bot. Ges. Wien, 1876, p. 310, pl. II, fig. 1 (part).
1877, Liocephalus grayit, GUNTHER, Proc. Zool. Soc. Lond., 1877, p.
67 (part).
1885, Tropidurus grayi, BouLENGER, Cat. Lizards, II, 1885, p. 172
(part) ; Core, Proc. U. S. Nat. Mus., XII, 1889, p. 145 (part) ; BouLENGER,
Ann. and Mag. Nat. Hist., (6), VII, 1891, p. 502 (part).
1890, Tropidurus albemarlensis, Baur, Biol. Centralbl., X, p. 478; Baur,
Festschrift fiir Leuckart, 1892, pp. 265, 269 (type locality, Tagus Cove,
Albemarle Island, Galapagos Archipelago).
1890, Tropidurus indefatigabilis, Baur, Biol. Centralbl., X, p. 478; Baur,
Festschrift fiir Leuckart, 1892, pp. 265, 268 (type locality, Indefatigable
Island, Galapagos Archipelago).
1892, Tropidurus jacobii, Baur, Festschrift ftir Leuckart 1892, p. 269
(type locality James Island, Galapagos Archipelago).
1903, Tropidurus grayi grayi, HELLER, Proc. Washington Acad. Sci., V,
1903, p. 69 (part).
1903, Tropidurus grayi magnus, HELLER, Proc. Washington Acad. Sci.,
V, 1903, p. 74 (type locality Narborough Island, Galapagos Archi-
pelago).
Diagnosis.—Sides of neck granular, with numerous folds;
hind legs of males without definite dark spots; interparietal
plate usually much broader than long; not more than 76 scales
around middle of body; scales larger than in T. albemarlensis
barringtonensis, 50 to 69 around middle of body.
Types.—Dr. Baur described T. albemarlensis from eleven
specimens collected by the naturalists of the “Albatross” at
Tagus Cove, Albemarle Island, in April, 1888. These lizards
are Nos. 15003 to 15013 of the U. S. National Museum col-
lection. T. indefatigabilis was described from ten examples
from Indefatigable Island. JT. jacobii was based upon a con-
siderable number of specimens from James and Jervis islands.
The type of Heller’s 7. grayi magnus was collected on Nar-
Vo. II, Pr. 1] VAN DENBURGH—SLEVIN—GALAPAGOAN LIZARDS 173
borough Island, and is No. 3974 in the collection of Leland
Stanford Junior University.
Distribution—This lizard has been collected on Indefa-
tigable, South Seymour, Daphne, James, Jervis, Cowley, Brat-
tle, Albemarle, and Narborough islands, Galapagos Archi-
pelago. On Albemarle Island it has been found at Bank’s
Bay, Tagus Cove, Cowley Mountain, Iguana Cove, and the
southeast coast near Vilamil or Turtle Cove.
Material—The Academy’s collection contains specimens
about as follows:
Indefatigable Island, 72; scales counted in 24 males, 42 females.
“ Py iT7 “ “e 12 “ 1 “
S. Seymour ;
Daphne “ce 52): 3 “ “ 27 “ 24 “e
James “ 239; “ “ “ 59 “ 06 “ee
Jervis oe 22; 3 “ “ 6 “ 16 “e
Cowley oe 1 f “ “ “ 1 “ 0 “
Brattle e AS ih ac << AAI aE Gr us
Albemarle Island at:
Banks Bay SOs as nls | sere odis anise
Tagus Cove ce nies s OSs Bee SR Loy 1G
Cowley Mt. 1S s mt Le aa ass Ohare
Iguana Cove 4 : “ “ Gis) ‘“ 2 “
Vilamil PAS 15 “ Olin, yiseas) TOOK eS
Narborough Island 101; “ 6 Marc lees Boze: BS ae ts
Description of adult male No. 12287, Tagus Cove, Albemarle Island.—
The head is covered above with smooth scales; interparietal largest,
broader than long; five or six large superoculars; superciliaries imbricate ;
five superior and five inferior labials, to below middle of the eye; rostral
very broad and low; symphyseal broad, followed by a series of large sub-
labials, of which all but the first are separated from the infralabials by a
row of smaller plates. Ear-opening large, with an anterior denticulation
of four or five long, narrow scales. Sides of neck between ear-opening
and fore limb with numerous granular folds. A strong antehumeral,- but
no complete gular, fold. A well-developed median dorsal crest begins half
the length of the interparietal behind this plate, and runs continuously to
and along the tail, being highest on the proximal fourth of the tail. The
dorsal regions of the neck, body, and tail are covered with rather small,
keeled, mucronate scales, which, on the body, change gradually to smaller,
keeled, mucronate laterals. These again change gradually into the smooth
ventrals, which are much smaller than the dorsals. The gular scales are
smooth, smaller centrally, smallest below the ears. The scales of the
chest are largest, smooth and imbricate. The limbs are provided above
with keeled, and below with smooth, scales. The posterior surface of the
thigh is covered with imbricate scales, which, toward the dorsal surface
of the thigh, become keeled. The lateral caudals are strongly keeled and
mucronate; while the inferior caudals are smooth proximally, but become
keeled on the distal portion of the tail.
The coloration in alcohol is olive brown above, spotted, except on the
head, tail, and hind limbs, with small rounded, blackish spots, each cover-
ing one or more scales. The chin is yellowish. The throat is black. The
other lower surfaces are greenish or yellowish, marked on the chin, gular
region, chest, and sides of body with discrete, rounded spots of black or
dark brown.
174 CALIFORNIA ACADEMY OF SCIENCES [Proc. 4TH SER.
Length to fanus) 2a... ssrasees <6 sl nee one mm. 85
Tength of stall acec coer teeter 116+
SnOtt TOMEAT) eye io dtara ayecopovesie a ioveie sarayset Reaelney > 18
Width) of- head .ttccmaawisiee.ccaneice eon 22.5
Hore: limber as cers choke ce rs oe eee eee 35
Efinid silimby hoot eel esis eee erence eter 59
Base of fifth to end of fourth toe .......:.. (45)
Pleight of ‘crest ion napemecmes «ncante eerie 2
Height of crest on midbody:.... 5. sc... st ZZ
Height+of crest son) tail oanec. cone ceca 3
Coloration in life of adult female, Tagus Cove.—“Above
brown, spotted with lighter brown except on tail, which is
grayish brown. Hind limbs like the tail, fore limbs colored
like the back. Belly light grayish, hind limbs and tail in-
feriorly the same. Breast pale yellow spotted with black;
throat dark, with yellow-edged scales; chin lighter, grayish,
dusky spotted; infralabials and mental pinkish. Sides dull
brick red, black-spotted; a dark stripe from the ear to the
thigh, and another fainter one from the axilla to the thigh.
Sides of head and neck brighter red, with a dark antehumeral
spot.”
Coloration in life of adult male, Iguana Cove.—Above
olive brown, flecked with pale greenish gray, dorsal crest like
spots except on the nape, where it is dark-spotted; limbs above
like the back. Head uniform brownish, sides of body the
same, but dark-spotted. Sides of neck tinged with reddish; a
black antehumeral spot. Belly pale greenish gray, bordered
with brick red on the sides; limbs and tail inferiorly like the
belly. Breast chrome yellow spotted with black, the throat
clay-yellow, much spotted with black, mandible grayish, labials
greenish.”
“The males secured in Iguana Cove show much variation.
Those inhabiting the light soil in brushy areas are lighter; in
some, the breast being yellowish with a few scattered spots,
and the throat grayish. Others taken near the beach, on
black basaltic lavas, have the breast, throat, and mandible
solid blackish, and the belly plumbeous. Some of the light
specimens are considerably lighter above than the one de-
scribed, the dorsal crest being entirely light grayish, and sides
of the belly dark-spotted, with the dark markings of the back
arranged in transverse bars.”
Coloration in life of adult female, Iguana Cove-— ‘Much
darker brown above than the male, with light dorsal crest,
Vor. II, Pt. 1] VAN DENBURGH—SLEVIN—GALAPAGOAN LIZARDS 175
black-spotted above; tail somewhat lighter, with a greenish
dorsal crest and light spots; fore limbs like the back; hind
limbs like the tail, light-spotted. Belly pale greenish gray,
breast golden, black-spotted; throat and mandible brick red.
Tail and hind limbs inferiorly like the belly; fore limbs like
the breast, black-spotted. Sides of throat, mandible, and body
brick red; a black antehumeral spot.’’
Coloration in life of three adult males, James Island.—1)
“Above dark brown, spotted with blackish and light grayish
spots; dorsal crest and the scales at its base light grayish; hind
limbs and tail above lighter dusky brown, the former light-
spotted; head above olive brown. Belly, thighs, and tail in-
feriorly light grayish; breast buffy and pinkish, sparingly
black-spotted; throat black, mandible pinkish, black-spotted
posteriorly. Sides of head light brownish, preoculars light-
spotted, lower eyelid bluish; sides of neck bright red, black-
spotted; a black antehumeral spot, light-bordered anteriorly;
shoulders blotched with yellowish and brown. Sides of the
body lake red, spotted with black and whitish spots except
about the axilla and along the sides of the belly.”
2) “The back is brownish, with black spots which extend
down to the light bluish coloration below. Dorsal crest very
prominent, of a light greenish tint. Sides of neck reddish,
with black spots. Black blotches in front of each shoulder.
Chin and lower jaw pale red. Gular region black. Chest
with faint black spots. Below light blue.”
3) “Back brown with scattered black spots. Upper sur-
face of fore limbs also with black spots. Folds on neck red
with large black spots. Antehumeral spot black, larger than
in females. Chin light straw color with a few small black
spots. Gular region black. Chest brick red with small black
spots. Belly and lower surfaces of hind limbs and tail dull
light blue.”
Coloration in life of three adult females, James Island.—1)
“Above golden-brown, crest grayish-white, nape and_ tail
lighter without golden coloration; limbs above like dorsum.
A dark brown band, two scales wide, extending from the ear
176 CALIFORNIA ACADEMY OF SCIENCES [Proc. 4TH SER.
to above the thigh; a lighter or fainter one from the axilla
to the thigh. Belly, hind limbs, and tail inferiorly light gray-
ish; breast, throat, and mandible canary yellow, black-spotted.
Sides of head orange red; sides of neck and body red, bright-
est anteriorly, lake red posteriorly, on body the scales light-
edged, sparingly dark-spotted; a black antehumeral spot.”’
2) “Back brownish. Sides of neck reddish with black
blotch in front of shoulder. Gular region lemon color with
black spots. Lower surfaces pale blue.”
3) “Back light bronze. A row of small black spots runs
along the side, starting behind the fore limb and ending a little
in front of the hind limb. The folds on the side of the neck
are brick red. There is a black antehumeral spot. Throat
and chest bright lemon color with black spots. Belly and
lower surfaces of hind limbs and tail dull light bluish.”
Variation.—Although the lizards which are here included
under one name have been described as several distinct species,
we have not been able to find any differences which are con-
stant enough to justify us in making any division. The scale
counts agree quite closely in specimens from all these islands.
Females from South Seymour and Indefatigable islands show
most red suffusion about the chin and throat, but red is shown
also by specimens from Daphne, James, Jervis, and Albemarle
islands. Jervis and Seymour specimens of both sexes may
show red. Specimens from Indefatigable Island vary but
little. The black dorsal spots may be present or absent on fe-
males, but are constant on males.. Gular folds and under
surface of shoulders in both sexes may show a faint coloring
of red. Interoccipital wider than long.
South Seymour Island. Females may have indistinct dor-
sal markings, otherwise there is little variation. The gular
folds and sides of the belly back of the shoulders are distinctly
marked with red, those without it being the exception. The
males have all the under surface of shoulders and chin dis-
tinctly marked with red spotted with black. Throats of fe-
males are white, spotted with black. Interoccipital wider than
long.
Vor. II, Pr. I] VAN DENBURGH—SLEVIN—GALAPAGOAN LIZARDS DAF
Daphne Island. Black cross-bars over the shoulders and
black spots on the front limbs are present in males, but always
absent in females. Throats of males are always black, while
those of females are white, spotted with black. Some speci-
mens may have a slight showing of red on the gular folds.
This rarely occurs, but may be seen in either sex. Interocci-
pital wider than long.
James Island. Females lack the black throat which is con-
stantly present in the males. They may be sparingly spotted
with black, but usually are uniform brown. Throats may be
white or grayish, spotted with black. Gular folds may have
a slight showing of red, but this occurs more often in the, fe-
males. Interoccipital wider than long.
Jervis Island. Females with or without indistinct dorsal
spots. Adult males show red on sides of the belly just back
of the shoulders. Interoccipital wider than long.
Brattle Island. Specimens show little variation. The
throats of females are, as usual, white or grayish, spotted with
black. The black dorsal spots are present in some females,
but not as prominent as in the males. Interoccipital wider
than long.
Bank’s Bay, Albemarle Island. Females may show indis-
tinct dorsal spotting, which is constant in the males. Throats
may be red or slate color, spotted with black. Some female
specimens have the gular folds and sides of the belly reddish
spotted with black. Some few males have red coloring like
the females, but not so bright. Interoccipital wider than long.
Tagus Cove, Albemarle Island. Females may have throats
white or grayish, spotted with black, and some specimens are
faintly red on gular folds. They may have faint dorsal
markings similar to the prominent ones of the males. Inter-
occipital wider than long.
Vilamil, Albemarle Island. Females differ little in coloration,
but a few may have red on the gular folds and a trace on top
of the head. The throats are white or grayish, spotted with
black. A black blotch in front of the shoulders is common in
both sexes. The black dorsal spots are constant in males, but
rare and indistinct in females. Interoccipital usually wider
than long.
178 CALIFORNIA ACADEMY OF SCIENCES [Proc. 41H Ser.
Narborough Island. Throats of females may be either
slate color or blackish like the under surfaces of the body,
with or without black spots. Those of males are usually
black, but may be slate color with large black spots. The
black dorsal spots are present in both sexes, but indistinct in
the females. Some females may have a very faint showing of
red along the sides of the belly. Interoccipital wider than
long.
TABLE OF SCALE COUNTS—INDEFATIGABLE ISLAND
| Scale Scale
Number Sex | Rows Crest Belly Number Sex | Rows Crest Belly
10228 rol 53 40 67 10236 2 56 42 67
10229 ou 56 44 67 10374 2) 52 50 69
10373 (of 55 47 66 10382 io) 55 45 68
10376 fof 55 44 59 10384 2 56 43 60
10377 fof 55 41 67 10389 2 57 48 65
10385 Ch a3 42 61 10390 2 Ais 43 68
10386 ros 53 42 63 10392 g 56 44 63
10391 fol 54 47 65 10397 ie) EY) 40 60
10394 fof 56 38 65 10400 io) 56 41 68
10398 rofl 53 43 64 10401 °) 54 43 64
10399 fof rail 43 68 10402 io) 55 42 63
10403 fou 57 44 66 10404 io) 57 42 67
10407 rofl 56 43 65 10405 2 56 41 68
10410 fol 56 42 67 10406 ie} 25 40 62
10419 Ct 56 44 67 10408 te) 57 ae 68
10424 (oy 56 40 68 10409 2 55 40 66
10546 rol 54 41 66 10411 2) 54 47 68
10549 of 55 43 63 10412 2 53 44 60
10550 fou 54 47 63 10413 2 53 40 64
10551 a 54 40 67 10414 2 55 41 66
10552 fou 53 42 61 10415 9 52 41 62
10793 fol 54 44 63 10416 2 57 43 67
12066 fof 53 46 60 10417 g 57 43 67
12067 ‘of 54 40 69 10418 ) Si 41 66
10420 ed 53 40 63
10421 2 57 43 64
10422 2 54 42 66
10423 2 a) 42 63
10425 ie) 57 x 65
10426 g 52 40 62
10427 ie) 54 ai 64
10547 Q 53 43 64
10548 2 56 42 69
10553 9 50 40 62
10554 2 54 41 66
10555 S 55 41 63
10556 ie) 56 44 69
10557 ©} 54 44 63
10558 2 55 43 64
10794 2 57 40 65
12068 2 55 aa 68
12069 te) 55 40 64
Voz. II, Pr. I]
TABLE OF SCALE COUNTS—SouTH SEYMOUR ISLAND
VAN DENBURGH—SLEVIN—GALAPAGOAN LIZARDS
179
Scale Scale
Number Sex | Rows Crest Belly Number Sex | Rows Crest Belly
10434 fot 56 44 69 10430 io) 56 45 66
10435 fou 56 46 68 10431 2 57 44 67
10439 fol 59 41 68 10432 ie) 52 46 66
10440 foil 54 38 68 10436 fe} 55 43 66
10445 ch 56 45 73 10438 ie) 55 a 68
10456 of 54 39 68 10441 9) 57 44 69
10457 ou 60 42 71 10443 ce) 54 44 66
10458 fol 52 41 66 10444 i) 57 46 72
10480 ofl 52 39 68 10446 g 54 43 66
10481 (ofl 59 43 69 10447 2 55 45 66
12080 fof 55 44 67 10448 2 57 42 65
12081 ofl 54 43 68 10449 i) 57 40 69
10450 2 54 41 66
10451 g 55 44 65
10452 ie) 60 46 ole
10453 2 60 40 71
10454 2 57 ee 69
10455 2 58 44 68
10459 g 55 44 69
10460 9) 58 40 70
10461 ie) 56 45 67
10462 fe) 56 45 66
10463 ©) 57 44 70
10464 2 60 42 66
10465 °) 55 44 66
10466 io) 58 41 70
10467 ie) 58 42 67
10468 2 58 45 67
10469 g 56 ae 65
10470 ie) 59 44 65
10471 g oe 45 67
TABLE OF SCALE COUNTS—DAPHNE ISLAND
Scale Scale
Number Sex | Rows | Crest | Belly Number | Sex | Rows | Crest | Belly
10487 fou 61 47 72 10492 ie) 60 49 70
10488 fou 59 44 72 10493 2 60 AS 71
10489 to 61 43 72 10494 io) 63 44 72
10490 fof 59 49 71 10498 g 65 44 71
10491 fol 62 49 72 10499 ce) 64 47 71
10496 fof 65 46 72 10501 fe) 65 43 71
10497 of! 58 48 We 10502 2 63 48 71
10500 fol 62 47 72 10504 ie) 62 51 72
10503 foil 61 48 70 10506 io) 63 48 70
10505 ofl 62 44 72 10507 2 65 47 71
10509 ot 64 45 73 10508 fe} 55 45 66
10510 fof! 62 48 70 10512 2 61 47 72
10511 rofl 58 47 71 10515 2 66 46 72
10513 fol 60 46 70 10516 fe) 61 50 75
10514 of 63 47 71 10517 fe) 63 45 70
10518 ofl 63 47 74 10521 2 63 44 70
10519 fof 65 49 71 10524 ie) 66 50 72
10520 fof 61 44 73 10526 2 62 44 a
180 CALIFORNIA ACADEMY OF SCIENCES [Proc. 47H Ser.
TABLE OF SCALE COUNTS—DAPHNE ISLAND—Continued
Scale Scale
Number Sex | Rows | Crest Belly Number Sex | Rows | Crest | Belly
10522 fou 61 48 74 10528 2 61 49 70
10523 fou 61 46 72 10531 °) 60 43 68
10525 fot 62 a4 70 10534 2 65 49 73
10527 ou 62 SG ( 10536 ie} 66 46 72
10529 rofl 58 45 68 10537 2 65 48 72
10530 ofl 60 47 72 10538 °) 60 49 72
10532 ou 62 45 69
10533 op 59 47 68
10535 coh 60 ae 71
TABLE OF SCALE COUNTS—JaMEs ISLAND
Scale Scale
Number Sex | Rows | Crest | Belly Number | Sex | Rows | Crest | Belly
10587 lop 58 39 75 10593 io) 63 43 74
10588 tof 67 43 74 10595 g 63 42 72
10591 fou 63 40 74 10596 2 60 43 72
10592 cof 64 ic 73 10597 io) 60 41 72
10594 fos 54 40 68 10599 2 64 43 74
10602 of 63 42 72 10604 iS] 63 42 74
10618 lef 60 41 73 10619 2 58 41 72
10624 fof 60 40 68 10620 g 61 43 72
10631 fou 60 46 70 10621 g 55 AD 70
10635 fol 58 42 70 10622 is) 60 44 74
10652 fof 61 43 68 10623 g 59 42 70
10653 fou 59 42 66 10625 g 62 37 68
10655 rol 62 38 70 10627 i) 61 42 69
10656 a 59 45 66 10628 is) 61 40 74
10657 fos 58 38 70 10629 2 59 42 69
10658 rol 62 41 77 10630 g 59 43 68
10661 of 56 40 (fs 10632 g 61 44 68
10662 tof 62 43 70 10633 2 62 40 71
10666 og 63 42 68 10634 io} 58 Ac 74
10667 fos 57 44 76 10636 9 60 44 73
10669 fof 60 39 73 10637 2 57 44 71
10670 fou 63 42 69 10638 2) 58 38 68
10672 (of 60 44 74 10639 °) 56 42 66
10673 oF 58 42 71 10640 2 62 44 75
10674 of 60 43 69 10641 io) 52 oe 69
10676 ou 64 46 79 10642 9 62 44 72
10678 rot 61 42 70 10643 2 59 42 73
10681 fof 58 40 70 10644 ) 59 44 73
10682 ‘of 57 47 73 10646 2 63 42 72
10683 fou 58 42 71 10647 2 61 44 71
10684 fou 60 40 69 10648 io) 57 42 68
10691 fou 63 39 3) 10649 2 59 43 72
10694 (ef 62 43 77 10650 2 63 41 73
10695 fof 59 39 69 10654 2 61 39 73
10698 fof 60 42 71 10659 2 59 43 71
10700 fol 64 43 72 10660 °) 60 43 68
10706 fof 58 45 74 10663 2 58 41 72
10707 fof 64 42 71 10664 °) ST 40 68
10708 fof 60 42 69 10665 2 56 44 68
10713 rol 60 42 70 10668 be) 63 43 74
Vou. II, Pr. 1] VAN DENBURGH—SLEVIN—GALAPAGOAN LIZARDS 181
TABLE OF SCALE COUNTS—JaMEs ISLAND—Continued
Number
10720
10723
10735
10737
10739
10740
10741
10742
10743
10747
10748
12101
12103
12107
12108
12109
12125
12132
12133
Ay Ay QQ Ay QW Ay AQ Ay Ay FW Ay AY Ay A A Ay OY A
Scale
Scale
Rows Crest Belly Number Sex | Rows Crest Belly
59 38 71 10675 g 58 42 70
58 40 70 10677 ie) 62 42 70
64 42 70 10679 °) 63 43 70
60 44 75 10680 io) 64 43 70
61 40 71 10685 °) 59 40 67
60 37 72 10686 g 62 Sil 75
61 43 67 10687 is 58 ant 72
58 43 71 10688 2 64 40 68
64 44 68 10689 2 56 44 72
60 42 70 10690 2 60 43 70
59 44 70 10692 g 57 42 70
62 40 71 10693 2) 64 44 73
61 ad 68 10696 g 60 42 74
57 35 71 10697 g 61 42 72
60 40 72 10699 ) 60 40 73
57 41 70 10701 g 61 41 72
56 41 68 10702 io} 61 42 71
61 45 74 10705 2 60 40 72
58 46 74 10709 2 60 40 74
10711 ) 61 46 69
10712 io) 63 44 75
10714 g 63 41 75
10715 Q 57 41 67
10716 °) 59 44 69
10717 f°) 61 40 71
10718 io) 61 38 70
10751 ie) 62 43 70
10755 g 62 43 67
10757 ie) 60 43 70
10760 2 61 42 73
10761 io) 61 43 72
10762 ke) 61 43 70
10764 io) 58 42 69
10768 2 56 44 68
10769 2 62 41 74
10772 g 62 40 72
10773 ie) 60 44 70
10778 ) 56 39 65
12099 g 62 41 76
12100 g 62 41 77
12102 2 64 42 tu
12104 2 57 44 73
12105 ie) 60 41 69
12106 g 61 Sil 73
12110 12} 63 42 74
12111 2 61 43 uel
12112 9 59 41 73
12113 2 58 35 74
12114 2 61 41 73
12115 9 60 39 71
12124 9 60 42 69
12126 2 63 43 71
12127 ie) 61 41 72
12129 2 59 40 68
12130 ie) 61 41 72
12131 ie) 60 43 71
September 17, 1913
182 CALIFORNIA ACADEMY OF SCIENCES [Proc. 41H Ser.
TABLE OF SCALE COUNTS—JERVIs ISLAND
Scale Scale
Number Sex | Rows | Crest | Belly Number | Sex | Rows | Crest | Belly
10574 os 65 43 71 10569 g 63 43 dit
10575 Ct 64 41 2 10570 co) 60 46 71
10577 ol 62 40 70 10571 2 60 38 72
10578 fol 68 40 76 10572 fe) 60 39 70
10607 os 64 48 17 10573 io) 65 43 74
10608 fou 61 43 71 10576 g 61 42 71
10579 ie) 61 43 70
10580 9 62 45 69
10581 Q 60 42 70
10582 fe) 62 43 70
10583 9 59 42 64
10584 i) 69 40 76
10585 fe) 60 43 70
10586 g 61 39 69
10606 9 63 42 75
10609 9 65 40 75
TABLE OF SCALE COUNTS—BRATTLE ISLAND
Scale Scale
Number Sex | Rows | Crest | Belly Number Sex | Rows } Crest | Belly
10238 os 61 43 66 10237 2) 60 40 67
10239 rot 64 40 66 10242 9 61 40 67
10240 rot 62 41 67 10245 9 61 42 69
10241 rot 64 41 67 10249 2 61 38 64
10243 rol 64 42 65 10252 2 60 40 68
10246 rot 63 41 69 10253 e 60 40 64
10247 rot 61 40 65 10254 2 62 41 67
10248 oo 61 39 66 10258 Q 62 42 64
10250 rot 67 40 67 10262 2 61 40 68
10251 rot 61 40 63 10263 g 62 39 68
10255 rot 63 38 67 10267 9 61 45 68
10257 rot 66 Ag 69 10270 g 67 38 69
10259 ros 62 39 67 10274 9 65 43 69
10260 rot 61 37 66 10276 io) 59 39 66
10261 of 63 40 65 10277 co} 65 40 68
10264 a 62 42 67 10278 g 61 BO 63
10266 oy 61 40 66
10268 os 63 40 66
10269 ros 62 40 64
10272 oh 63 41 65
10275 af 65 42 65
TABLE OF SCALE COUNTS—CoWLEY ISLAND
Scale
Number Sex | Rows | Crest | Belly
12167 o |) 61 42 67
Vor. II, Pr. 1] VAN DENBURGH—SLEVIN—GALAPAGOAN LIZARDS
183
TABLE OF SCALE COUNTS—BANk’s BAY, ALBEMARLE ISLAND
Number
11356
11358
11385
11388
11389
11390
11391
11396
11397
11400
11401
11429
Dy Ay Ay Ay Py Ay Ay Ay Ay Py Qy Py
Scale
Rows
Crest
Scale
Belly Number Sex | Rows | Crest | Belly
60 11355 g 58 37 64
62 11357 g 58 41 61
63 11360 g 62 38 68
66 11361 g 60 40 63
63 11362 g 61 43 68
64 11363 g 56 38 64
60 11364 2 58 36 61
63 11365 g 62 39 67
62 11384 io) 55 41 61
68 11386 g 59 39 63
63 11387 g 59 38 60
66 11392 g 61 39 55
11395 2 Gy 40 66
11398 °) 61 43 64
11402 io) 63 43 65
11403 2 57 37 61
11404 2 58 39 64
11406 2 58 37 63
11407 io) 64 40 67
11408 g 59 36 67
11409 2 64 43 67
11410 Q 61 38 60
11411 2 57 40 65
11414 2 64 39 66
11416 (e) 59 39 66
11417 Q 58 45 68
11418 2 60 38 68
11420 g 63 39 65
11421 ©) 57 41 62
11424 fe) 61 42 62
11425 9 58 39 65
11426 °) 62 37 61
11427 2 60 36 65
11428 ie) 58 40 66
TABLE OF SCALE COUNTS—TacGus Cove, ALBEMARLE ISLAND
Number
11275
11276
11278
11280
11281
11284
11287
11289
11291
11294
11295
11296
11297
11302
11370
Sex
Scale
Dy Wy A Ay WH Ay Ay Ay Ay A Ay AQ AY OY AY
Rows Crest Belly Number Sex | Rows Crest Belly
59 35 63 11277 g 59 36 63
58 36 65 11279 Q 60 39 64
60 33 65 11282 2 58 38 63
57 34 63 11283 ie) 57 41 60
62 41 65 11285 9 58 42 64
60 38 62 11286 g 61 39 65
58 40 63 11288 2 60 36 60
59 38 68 11290 io) 58 35 62
60 38 65 11292 io) 56 36 63
60 39 58 11293 °) 58 37 62
60 35 60 11298 ie) 57 40 64
61 36 66 11299 io} 57 43 62
60 40 65 11301 2 56 42 65
58 34 61 11303 ce) 55 38 61
58 37 59 11304 fe} 60 43 62
184
CALIFORNIA ACADEMY OF SCIENCES
[Proc. 4TH Ser.
TABLE OF SCALE COUNTS—TaGus CovE, ALBEMARLE ISLAND—Cont'd
Scale Scale
Number Sex | Rows | Crest | Belly Number | Sex | Rows | Crest | Belly
11372 fol 58 36 60 11369 g 60 43 62
11381 fof 59 38 61 11371 2 61 39 61
11383 of 62 37 63 11373 io) Ol 37 65
11374 ie) 56 37 61
11375 () 60 i, 64
11376 ) 57 39 65
11377 9 60 37 65
11378 2 58 36 60
11379 is) 55 36 65
11380 io) 54 39 63
11382 2 54 37 61
TABLE OF SCALE COUNTS—COWLEY MOUNTAIN, ALBEMARLE ISLAND
Scale
Number Sex | Rows | Crest Belly
12157 rol 60 41 65
TABLE OF SCALE COUNTS—IGUANA COVE, ALBEMARLE ISLAND
Scale
Number Sex | Rows | Crest
11249 fof 59 42
11250 fou 59 38
Belly
67
64
Number
11251
11261
Sex
.
2
Scale
Rows
56
Crest | Belly
40 67
37 68
TABLE OF SCALE COUNTS—VILAMIL, ALBEMARLE ISLAND
Number
10310
10313
10314
10315
10322
10324
10325
10326
10329
10344
11558
11559
11134
11136
11137
11138
11143
11148
11153
11154
11157
11158
n
@
w
Dy Wy Wy Ay AY AY AYA A AY AW AW A A A Ay Ay AW AW A A
Scale
Rows
Crest
Belly
Number
10308
10309
10311
10316
10317
10318
10319
10320
10321
10323
10327
10328
10330
10332
10333
10335
10336
10337
11133
11135
11141
11151
40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 10 10 10 10
Crest
Belly
Vou. II, Pt. 1] VAN DENBURGH—SLEVIN—GALAPAGOAN LIZARDS
185
TABLE OF SCALE COUNTS—VILAMIL, ALBEMARLE ISLAND—Continued
SI cale
Number Sex peale Crest Belly Number Sex | Rows | Crest Belly
11160 foil 62 42 69 11152 2 56 38 67
11163 ot 59 41 71 11162 2 59 39 63
11167 on 62 35 63 11166 o) 61 39 62
11179 rol 60 43 68 11169 2 58 38 66
11183 on 57 39 69 11170 re) 62 43 69
11185 fot 59 39 66 11171 io) 60 40 68
11186 fof 62 36 69 11173 2 64 38 67
11198 fof 61 36 60 11175 g 59 43 69
11202 ol 60 40 64 11176 2 53 39 63
11209 fof 58 32 57 11177 ©) 63 b9 69
11211 fof 59 36 65 11181 ie) 63 42 66
11216 fol 59 42 68 11182 io) 60 41 63
11218 fol 57 36 66 11544 °) 60 39 67
11219 fol 57 34 60 11546 .°) 57 40 66
11224 fou 55 37 65 11548 se) 55 42 65
11225 foil 60 40 64 11550 ie) 58 40 64
11226 ou 59 39 65 11551 2 H/ 39 60
11227 ofl 59 40 66 11552 ie) 57 40 70
11229 a 62 37 67 11553 g 59 36 66
11545 ou 62 42 67 11554 ie) 60 42 69
11547 (ofl SH 43 70 11555 2 59 39 63
11549 of 64 38 64 11556 io) 57 39 60
11557 ofl 62 39 66 11561 9 56 38 67
11563 ef 57 41 65 11562 2 56 40 64
11565 ofl 62 41 71 11564 ce) 57 41 64
11568 ofl 56 40 68 11566 ie) 60 38 68
11570 foil 59 42 66 11567 °) 61 43 64
11572 ol 57 36 64 11569 ie) 59 37 67
11573 fol 60 40 67 11571 2 58 40 62
11574 fof 59 37 67 11576 fe) 57 40 67
11575 fof 57 39 63 11578 9 64 40 62
11577 of 57 40 62 11579 2 63 41 62
11580 oO 56 41 63 11584 9 55 39 64
11581 fol 56 41 66 11588 2 55 41 63
11582 fof 58 42 62 11590 2 60 38 63
11583 fol 55 40 62 11591 2 56 39 67
11585 fol 56 39 61 11592 2 60 40 ill
11586 fof 63 36 66 11594 2 58 41 68
11587 oe 60 ats 65
TABLE OF SCALE COUNTS—NARBOROUGH ISLAND
Scale Scale
Number Sex | Rows | Crest Belly Number Sex | Rows | Crest Belly
11272 fol 58 38 69 11319 2 60 40 63
11273 ou 61 38 67 11320 2 58 37 65
11317 ofl 54 42 67 11328 2 55 37 63
11318 fol 56 41 71 11329 2 Ne 35 68
11321 fol 55 37 64 11330 2 62 39 a:
11322 fof 61 40 70 11331 ©) 58 35 66
11323 rofl 58 38 72 11332 g 61 37 65
11324 fol 55 38 66 11335 io) 54 41 67
11325 fol 54 41 68 11336 fe) 59 42 64
11326 fol 56 39 65 11337 g Syl 40 65
11327 of 60 43 76 11338 re) 59 38 67
186 CALIFORNIA ACADEMY OF SCIENCES [Proc. 4TH Sre.
TABLE OF SCALE COUNTS—NARBOROUGH ISLAND—Continuel
Scale Scale
Number Sex | Rows Crest Belly Number Sex | Rows Crest Belly
11333 fot 54 38 68 11339 2 57 36 63
11334 (og 58 38 66 11340 2 55 38 61
11343 (ofp Si H/ 67 11341 °) 58 42 67
11345 fou 64 39 65 11342 2 60 42 64
11346 fou 61 38 70 11344 ie) 56 39 67
11349 of 60 37 69 11347 io) 54 36 61
11350 fof 55 35 62 11348 g 55 40 67
11352 fof 55 36 64 11351 °) 58 41 {iW
11353 of 53 35 65 11430 2 iy) 36 62
11452 fou 58 39 63 11431 io} 55 36 61
11453 rot 59 37 66 11433 2 57 37 63
11454 rol 56 37 63 11434 g 55 39 64
11455 fou 59 37 65 11435 2 58 35 62
11456 rou $5 31 60 11436 ie) 60 37 66
11457 refs 54 35 62 11437 2 59 37 68
11458 fof 62 35 67 11438 2 57 39 65
11459 ot. 58 36 62 11440 2 60 35 64
11463 fot 59 42 67 11442 ie) 55 40 63
11464 of 58 39 69 11444 °) 56 34 67
11465 rot 58 38 68 11446 2) 55 36 61
11469 of 54 36 67 11447 g 59 36 64
11470 (ou 61 40 71 11448 °) 55 36 62
11471 fou ST 42 62 11449 2 54 38 63
11475 fof RE A 63 11450 toe vests 37 66
11477 ou ye 41 65 11451 g 55 38 63
11478 fot 58 39 68 11460 .S) 58 37 68
11483 fof 58 36 67 11461 °) 55 40 69
11484 fof eK) 32 60 11462 9 60 39 66
11485 fos 55 39 65 31466 °) 62 39 if
11486 fou 59 39 70 11467 2 55 37 66
11468 2 55 40 66
11472 2) 58 35 65
11473 2 54 38 67
11474 2 56 35 61
11476 ie) 60 39 61
11479 9 59 35 65
11480 2 60 40 66
11481 2 55 39 63
11482 2 55 36 62
11487 2 58 36 62
Habits.—The eggs vary from four to six in number. They
are white and elliptical with leathery shells. Females were
seen on various islands, in May and June, digging short
oblique burrows in the sand.
Stomachs of specimens from Indefatigable Island con-
tained insects and spiders; those from the Seymours, insects,
seed-cases, and berries; those from James contained spiders,
insects and seeds. On Narborough they are said to feed on
crustaceans near the shore, while farther inland insects and
the seed capsules and ovaries of various flowers are eaten.
Vou. II, Pr. 1] VAN DENBURGH—SLEVIN—GALAPAGOAN LIZARDS 187
Dec. 27, 1905.—Went ashore at James Bay to collect liz-
ards. Worked in the country back of the lagoon. I found
the lizards common though the brush and on the lava blocks.
Several were about six or seven feet up in the trees, probably
looking for insects to eat, and some were feeding on the green
leaves which are just sprouting. They were fairly tame, the
females being more active than the males.
July 28, 1906.—Followed up a valley toward Bartholomew
Island. Lizards are scarce inland, but common near the beach.
The mate reports them abundant on Bartholomew Island.
Aug. 8, 1906, James Bay.—Found the lizards somewhat
rarer than on our former visit. I examined the stomachs of
two females and found that they contained small fragments of
beetle wings. Hunter reports seeing lizards on the top of the
mountain, but they are somewhat scarce there.
Noy. 23, 1905.—Sailed for Daphne Island in the morning.
There are two islands: one a mere rock which it is impossible
to land on, the other a crater of a volcano. We landed on
the crater, and worked up to the top. I saw few lizards on
the outer slope, but they were common on the bottom of the
crater, which is a bed of white sand with a few scattered cactus
plants. Many of the Tropiduri kept in the shelter of the cac-
tus for protection from the hawks, which we saw sailing over
the island. Others were caught under lava blocks whither
they ran when frightened.
Narborough Island.—Lizards are common, but seem smaller
than those on the south side of the island. They are more
abundant near the coast. The females are wilder than the
males. The dark bodies of the lizards show distinctly against
the red lava.
August 22, 1906, Vilamil, Albemarle Island—Went up with
our outfit to the hacienda to start up the mountain. The
weather at this elevation (1300 feet) is constantly rainy and
foggy, and the prospect of camping is not very pleasant.
There is nothing visible in the way of reptiles. Tropiduri do
not seem to go much higher than 200 or 300 feet—the begin-
ning of the green zone. The country seems very wet for
them, just as Chatham Island does, and I did not see any as
far up as the crater, although they occur in the crater itself.
188 CALIFORNIA ACADEMY OF SCIENCES [Proc. 4TH Serr.
The grassy area commences at about 1500 feet and extends to
the rim of the crater at 3150 feet.
General remarks.—While the lizards of these islands are so
similar that we have been able to find no characters which will
serve to distinguish them, they nevertheless are not absolutely
identical. The Indefatigable Island lizards have scales some-
what larger than those of the James Island specimens. A
similar average difference probably exists between the lizards
of Narborough and Albemarle. As may be seen when the
counts of the scales about the body are plotted, the curves for
the various islands do not coincide, although their bases over-
lap. It thus becomes evident that differentiation has begun on
these islands also, although it still is too intangible to be recog-
nized in momenclature.
Conolophus subcristatus (Gray)
Land Iguana
Trachycephalus subcristatus Gray, Cat., p. 188.
Amblyrhynchus subcristatus Gray, Zool. Misc., 1831, p. 6, and Zool.
Beechy’s Voyage, Rept., p. 93; DaRWIN, Journ. Beagle, p. 469.
Amblyrhynchus demarlii DuM & Bir, Vir p OTe Beil, Zool. Beagle,
Rept., p. 22, pl. XII.
Hypsilophus (Conolophus) demarlii Frtzincer, Syst. Rept., 1843, p. 55.
Conolophus subcristatus STEINDACHNER, Festschr. Zool.-Bot. Ges.
Wien, 1876, p. 322, pls. IV-VII; GunTHER, Proc. Zool. Soc., 1877, p. 67;
Bout., Cat. Lizards, II, p. 187, 1885; Garman, Bull, Essex Inst., XXIV,
1892, p. 5 (part); Hetirr, Proc. Wash. Acad. Sci. V, 1903, p. 85.
Conolophus subcristatus pictus Roto & Hart, Novit, Zool., VI, 1899,
p. 102.
Diagnosis——Rostral once and a half times as broad as
high; dorsal crest not so high as in C. pallidus; snout less
pointed; coloration above, yellow on head, neck and fore
limbs; red, brown, or olive on back, hind limbs, and tail.
Distribution.—The land iguana was formerly abundant on
James, Indefatigable, South Seymour, Albemarle, and Nar-
borough islands. It now is very rare on Albemarle, and prob-
ably extinct on James and Indefatigable.
Material—aA few bones were collected on James. Sixteen
or eighteen specimens were secured on South Seymour, two
at Tagus Cove, Albemarle, and twenty-one on Narborough.
There seem to be no constant differences between the speci-
mens at hand from these islands. The Narborough iguanas
have red backs, while the South Seymour ones usually have
Vou. II, Pr. 1] VAN DENBURGH—SLEVIN—GALAPAGOAN LIZARDS 189
this region dark olive; but a few from Seymour are colored
like those from Narborough.
Variation—The supralabials are 9 to 13 (Seymour 9-13,
Narborough 9-13, Albemarle 11), the usual number being
eleven. The femoral pores are 20 to 27 (Seymour 20-24,
Narborough 20-27, Albemarle 21-22). The rostral is twice
as broad as high in thirty-one per cent of the specimens from
Seymour, seventy-five per cent of those from Narborough, and
fifty per cent of those from Albemarle; being less than twice
in all the other specimens. The large spines of the crest
usually begin nearer the skull in Seymour specimens than in
those from Narborough.
Field Notes.—South Seymour Island, Nov. 21, 1905.—
Land iguanas are common, and are scattered all about, not
living in colonies like those on Barrington Island. There are
a few burrows, but most of the iguanas live in the broken
lava. Some are red like the lava, and others are dark olive
above. The under surfaces of body and legs are yellow, and
the head is light yellow. The males here are very large. I
saw one large male eating on a cactus, and our mate, Mr.
Nelson, said that one came and drank the blood of a goat he
had shot. July 26, 1906.—Found iguanas common, the males
predominating. They have taken on a blackish color now,
and are not so brilliant as on our former visit. Several stom-
achs examined were found to contain cactus and the leaves
of a shrub (Maytenus) which resembles a scrub oak.
Indefatigable Island, Oct. 25, 1905.—Just back of the beach,
on the side of the island near Barrington, we found the de-
serted burrows of what must at one time have been a large
colony of land iguanas. The species seems now to be extinct
on this island.
James Island, July 28, 1906.—No iguanas were seen, but
I found some bones in a crack in the lava on the coast opposite
Bartholomew Island.
Tagus Cove, Albemarle Island, March 23, 1906.—Beck re-
ports seeing about six land iguanas, of which he secured one.
They are extremely wild. He noticed one very large brightly
colored male. The one taken was a female in the act of
shedding its skin. March 24, 1906.—I saw only one iguana
today. They are very rare; probably only six or eight are
190 CALIFORNIA ACADEMY OF SCIENCES [Proc. 4TH SER.
left in the colony. Judging from the number of burrows one
may safely say there were at one time as many as a thousand
in this colony. The survivors keep well in the brush, and
when once they start running do not stop until they get into
a burrow. Mr. Beck found a few more iguanas at the end of
a valley running along the foothills. April 7, 1906.—King
and I secured an iguana near the foot of the mountain oppo-
site Tagus Cove. He evidently was a stray one, as no other
signs of them were seen so far to the north. They do not,
however, any longer live in colonies. The one secured was a
male. He allowed us to approach fairly near, but went fast
when we chased him, and finally was caught in a hole in the
lava. He was shedding his skin.
Bank’s Bay, Albemarle Island, April 9, 1906.—Large num-
bers of deserted iguana burrows were seen all over the level
country.
Narborough Island, April 6, 1906.—Land iguanas are com-
mon. They are brightly colored yellow and red. They live
in cracks in the lava. No colonies of burrows were observed.
April 17, 1906.—We made a landing on a slope of cinders
and lava, over which we climbed to the top and reached a
plateau with some vegetation and a little soil, the country be-
ing mostly broken lava of a reddish color. This plateau
extended about two and a half miles to the base of the moun-
tain. Here we found iguanas scattered over the lava. They
were wild and had to be shot. All were of a uniform color,
males and females, brick reddish body and tail, head bright
yellow, and lower surfaces light-yellow. A few burrows were
seen, but most of the iguanas here live in holes in the lava.
The stomachs of those examined all contained Scalesia, a plant
growing some two feet high, and scattered abundantly over
the surrounding country. The females taken had no enlarged
ovaries, and their breeding season is possibly over. Males
and females were about equally common.
Conolophus pallidus Heller
Barrington Island Land Iguana
Conolophus subcristatus, GARMAN, Bull. Essex Inst., XXIV, 1892, p. 77
(part).
Conolophus pallidus, HELLER, Pros. Wash. Acad. Sci., V, 1903, p. 87.
Vou, II, Pr. 1] VAN DENBURGH—SLEVIN—GALAPAGOAN LIZARDS 191
Diagnosis.—Rostral not less than twice as broad as high;
dorsal crest higher than in C. subcristatus; snout more pointed ;
coloration above clay yellow.
Type—Adult female, Stanford University No. 4749. Bar-
rington Island, Galapagos Archipelago, May 1899.
Distribution.—Barrington Island.
Material—The Academy collection includes twenty-five
adult specimens in alcohol, and some skins and bones.
Variation—The supralabials range from 9 to 11, the usual
number being eleven. The femoral pores vary from 19 to 25,
the most frequent numbers being 21 and 22. The rostral is
not less than twice as broad as high in any specimen. The
coloration is constantly of the light yellowish type.
Field Notes.—Oct. 20, 1905.—Anchored on N. E. coast
of Barrington, and went ashore and a mile inland to
the iguana colony on a plateau at an elevation of
about three hundred feet. The ground is composed of soft
red volcanic dust which is easily dug by the iguanas. The
burrows resemble those of a ground-squirrel only larger. We
found the iguanas common here. As a rule they were sitting
at the mouths of their burrows, and would run in on near
approach. They were awkward in their movements but cov-
ered ground at good speed. They lose their heads when
chased by several persons, and don’t make for their burrows,
but run around and get caught in the brush, where they are
easily captured by their tails. They are very vicious, seizing
one another by the jaws and drawing blood. One we caught
tore the whole lower jaw off another. They are bright buff
to orange in coloration, the eyes being bright red with round
black pupil.
Oct. 23, 1905. Found three or four females containing
large eggs. The stomachs contained cactus, which grows
abundantly all over the island.
Oct. 24, 1905. Found the males rare, not living in the
colony, but outside in the lava piles. I think I have three
males altogether.
July 9, 1906. We found that some of the natives had vis-
ited the island and cleaned out the entire iguana colony where
we secured our specimens on our first visit. However, we saw
a few iguanas scattered about.
192 CALIFORNIA ACADEMY OF SCIENCES [Proc. 4TH Ser.
July 10, 1906. King and I visited the valleys on the north
coast. We saw numbers of iguanas scattered all about, but
none in colonies. They are still plentiful on this island,
despite the visits of the natives, who kill them for food.
We did not see any young specimens. Ten eggs were
taken from one female and seven from another. They are
large, with white, leathery shells. The ten measure 51X77,
53X77, 54X75, 54X77, 54X79, 54X79, 54X80, 54X82, 56X
77, and 57X77 mm. Some of the other set measure 50X74,
51X75, 51X78, 5278, and 53X73 mm.
Amblyrhynchus cristatus Bell
Sea Iguana
Amblyrhynchus cristatus Bell, Zoél. Journ., Il, 1825, p. 206, Supl., pl.
XII, and Zodl. Beagle Rept., p. 23; Dum «& Brsr., IV, 1837, p. 195; Dar-
win, Jour. Beagle, p. 466; A. Dum., Cat. Meth., Rept., p. 62; STEINDACH-
NER, Festschr., Zool-Bot. Ges. Wien, 1876, p. 316, pls. III, V, VI, VII;
Ginter, Proc. Zool. Soc., 1877, p. 67; BouLencEr, Cat. Lizards, II, p.
185; Cope, Proc. U. S. Nat. Mus., XII, 1889, p. 147; Garman, Bull. Essex
Inst., XXIV, 1892, p. 79 (part) ; Herter, Proc. Wash. Acad. Sci., V, 1903,
p. 89.
Oreocephalus cristatus Gray, Cat., p. 189, 1845.
Iguana (Amblyrhynchus) cristatus Gray, Griff. A. K., IX, Syn., p. 37.
Iguana (Amblyrhynchus) ater Gray, Griff. A. K., IX, Syn., p. 37.
Amblyrhynchus ater DuM & Brrr., p. 196.
Hypsilophus (Amblyrhynchus) cristatus Frrzrincer, Syst. Rept., 1843,
p: 55:
Hypsilophus (Amblyrhynchus) ater Frrzincer, Syst. Rept., 1843, p. 55:
Amblyrhynchus cristatus var. ater. GARMAN, Bull. Essex Inst., XXIV,
re Paeatiae cristatus var. nanus GARMAN, Bull. Essex Inst,
XXIV, 1892, p. 80.
Distribution—This species is restricted to the Galapagos
Archipelago, where it has been collected at, or reported from,
the following islands: Culpepper, Wenman, Abingdon, Bind-
loe, Tower, Chatham, Hood, Gardner-near-Hood, Charles,
Champion, Enderby, Barrington, Indefatigable, South Sey-
mour, Daphne, James, Jervis, Duncan, Brattle, Narborough,
and on Albemarle at Bank’s Bay, Tagus Cove, and Iguana
Cove.
Material—The present collection includes some one hun-
dred and eighty specimens, from Culpepper, Wenman, Abing-
don, -Bindloe, Tower, Chatham, Hood, Champion, Indefati-
gable, James, Jervis, Brattle, Narborough islands, and Iguana
and Tagus coves on Albemarle Island.
General remarks.—Careful comparison of the considerable
number of specimens at hand has revealed no constant differ-
Vor. II, Pr. 1] VAN DENBURGH—SLEVIN—GALAPAGOAN LIZARDS 193
ences between those from the various islands. ‘The sea
iguanas of Tower and of Duncan islands have been given
separate names by some authors, but we are unable to regard
them as distinct. Even the iguanas of widely separated
islands, such as Culpepper and Hood, seem not to differ upon
direct comparison.
Variation.—The femoral pores vary from twenty to thirty-
one. In all (7) specimens from Culpepper Island the mental
separates the infralabials. This same conditions is found in
three out of seven from Wenman Island, in twenty-seven out
of forty-four from Hood Island, in twenty-three out of
twenty-seven from Bindloe Island, in six out of eight from
Albemarle Island, in all (6) from Indefatigable Island, in
four out of five from Jervis Island, in twenty-nine out of
thirty-eight from Abingdon Island, in five out of six from
Brattle Island, in one from Champion Island, two from James
Island, one from Chatham Island, and four from Narborough
Island.
Field notes—Hood Island, Feb. 5, 1906. The iguanas
now are very brightly colored—green, red, and black. They
are common on the coast, and are seen lying close to the
water, their long claws enabling them to hang on to the rocks
in spite of the strong wash of heavy surf which breaks over
them. I saw none swimming or feeding today, in fact one
seldom sees them in the water. They lie in the sun on the
rocks, and never make for the water when pursued, but run
along the rocks and get into crevices.
Gardner-near-Hood, Oct. 1, 1905. Found sea iguanas com-
mon on Gardner. At low tide, they feed on the green sea-
weed which covers the rocks, while at high tide they take to
the higher places and lie in the sun.
Charles Island. No sea iguanas were seen by any of the
party.
Chatham Island, Feb. 16, 1906. Sea iguanas are very rare
on this island, where the natives formerly ate them and even
their eggs. Ochsner reports seeing about three in the vicinity
of Finger Point, and King secured one.
Barrington Island, Oct. 23, 1905. I saw only two sea
iguanas, and tried to catch one but failed. The other was on
a small rock a few hundred yards off the main island.
194 CALIFORNIA ACADEMY OF SCIENCES [Proc. 4TH SER.
Tagus Cove, Albemarle Island, April 5, 1906. Sea iguanas
are common on the rocks, and can be seen feeding on the sea-
weed at low tide. They eat with the sides of their mouths,
much as a dog would chew a bone.
Bank’s Bay, Albemarle Island, April 9, 1906. Sea iguanas
were abundant along the rocks. I saw none brightly colored
like those on Hood Island. None of the females had enlarged
ovaries, so the breeding season probably is over. I saw a
great many nests in the sand. These were little hollows about
a foot in diameter and six inches deep, sloping to a point at
the bottom. I could find no eggs. I saw iguanas here in the
water more than at any other place. They swim like our
water-dogs, (Diemvictylus) with the legs carried close to the
body, and propelling themselves by sinuous movements of the
body and tail. The head and crest to the middle of the body
can be seen above the water.
; ikl
r mls: }
7 mere 7 +
Hi TH ; "
te
j wir rhe ‘e ;
| a) rae:
‘ a
196 CALIFORNIA ACADEMY OF SCIENCES [Proc. 4TH SER.
EXPLANATION OF PLATE VIII
Chart of the counts of scales around the middle of the body in Tropi-
durus. Each dot represents the count on one specimen. In the counts
from each island, or locality, the males are represented on the upper line,
the females on the lower line. The crosses represent the extreme counts
given by previous authors.
Proc Cap VIII
o3
Narboroug!
Bank's Bay:
3
Tagus Covi?
Cowley M,
Iguana Cov}
Vilamil
Cowley Ie
Brattle |
Charles
Gardner
Enderby
Champion *”
Hood
Gardner
Chatham
Barrington i
Indefatigabl
Daphne
S. Seymour
Duncan
Jervis
James
Bindloe
Abingdon |
fi
Proc CaLAran. Sci. 4.7 SER. VoL II Prt.
Narborough
Bank's Bay
Tagus Cove
Cowley Mt.
Iguana Cove
Vilamil
Cowley Island
Brattle
Charles
Gardner
Enderby
Champion
Hood
Gardner
Chatham
Barrington
Indefatigable
Daphne
S. Seymour
Duncan
Jervis
James
Bindloe
Abingdon
SY $3 SE 50S;
[VAN DENBURGH an SLEVIN] PLATE VI
I]
. i. | 7 a ose
oy She
, f 7 ; ’ ; - a) :
198 CALIFORNIA ACADEMY OF S$
~ " =
EXPLANATION OF PLATE IX a
Chart of the counts of scales in the crest in Tropidurus. Eac
represents the count on one specimen. In the counts from each is
locality, the males are represented on the upper line, the females
lower, :
yi
Proc CALACA
Narborough
Bank's Bay
Tagus Cove
Cowley Mt.
Iguana Cove
Vilamil
Cowley Island
Brattle
Charles
Gardner
Enderby
Champion
Hood
Gardner
Chatham
Barnngton
Indefatigable
Daphne
S. Seymour
Duncan
Jervis
James
Bindloe
Abingdon
Proc CaLAcan. Sri 47 Ser. VoL {I Pr.l. [VAN DENBURGHanp SLEVIN] PLATE IX
Narborough
Bank's Bay
Tagus Cove
Cowley Mt.
Iguana Cove
Vilamil
Cowley Island
Brattle
Charles
Gardner
Enderby
Champion
Hood
Gardner
Chatham
Barrington
Indefatigable
Daphne
S. Seymour
SF 66 62 6
Fi
va)
4 7
CALIF! ORNIA sca ae
SCIENCE
: '
ee sen ie
ih ay
~~ we
EXPLANATION OF PLATE X. —_ =)
Chart of the counts of scales along the belly in Tropidurus. Each dot
represents the count on one specimen. In the counts from each isla a
locality, the males are represented on the upper line, the. females on
lower.
Proc CaLAran. Sy
Narborough
Bank's Bay ie
Tagus Cove -
Se
Cowley Mt. be ’
}
Iguana Cove
Vilamil al
Cowley Island
Brattle
hates
Gardner
ose t
6
See
Nic 2 Aiea
Gardner
Chatham
Barrington
fedefatinable
Daphne
SySeymour
Duncan
Jervis
James
Bindloe
Abingdon
~>
oC
Proc CaLAcan. Scr 47 Ser. VoL II Pr] (VAN DENBURGHanp SLEVIN] PLATE X
f. if Po z5
Narborough
Bank's Bay
Tagus Cove
Cowley Mt.
Iguana Cove
Vilamil
Cowley Island
Brattle
Charles
Gardner
Enderby
Champion
Hood
Gardner
Chatham
Barrington
Indefatigable
Daphne
S. Seymour
Duncan
Jervis
James
Bindloe
Abingdon
202 CALIFORNIA ACADEMY OF SCIENCES [Proc. 47H Ser.
EXPLANATION OF PLATE XI
Chart of counts of scales around the middle of the body in one hun-
dred specimens each from:
A.—Indefatigable and South Seymour islands.
B.—James Island.
C.—Narborough Island.
D.—Albemarle Island.
[VAN DENBURGHanp SLEVIN] PLATE XI
Proc CaLAcan Sci 4.7 Ser. VoL IPT]
4)
ii
Soe
i
Bek:
Bie Pe
on ee ee
oa se wdfvered tow ytiine
i
pttakiat
‘
oF
a a
oak
ros
ie Gees eo nd te oe od
PROCEEDINGS
CALIFORNIA ACADEMY OF SCIENCES
FourtTH SERIES
Vou. II, Pr. I, pp. 203-374, pls. 12-124 SEPTEMBER 30, 1914
EXPEDITION OF THE CALIFORNIA ACADEMY OF
SCIENCES TO THE GALAPAGOS
ISLANDS 1905-1906
x
THE GIGANTIC LAND TORTOISES OF THE GALAPAGOS
ARCHIPELAGO
BY JOHN VAN DENBURGH
Curator of the Department of Herpetology
CONTENTS
PAGE
INTRODUCTIONS conett ees Serta A ed toes St a 206
Gicantic LAND TortorsEs, Fosstt AND RECFN.. = 200
Indiani@ceantRaces:..20 1. ae yee an RE Se Ns 206
Galapagoan\iRaces |. i ee LO gene n es tt 209
Marlys istory) wean ae .. 209
First Discovery, 1535... .. 209
Cowley; 1684.22 eee sie 210
Dam pier, . 168422 ssa ee ee ve 210
Rogers, 1708............. yeu
Clipperton’) 17202. oe a eee ee 211
Colnetts 171/93: 2 eee eo Menbeneer ie. 2,181 212
Delano; 1800). 215 ies OU Rep NeneeenO )) 212
Borter: (181302 een er coe eae | 215
Pall IB22 2 es 8 de Aina ae meri Me AR eR Ny 2 219
Morrell 182356 seks eae er Mle terGiMeniee i. cs) 219
Birst; Settlement qlSgzeees semen neuen iene. 1) 1 in) 219
Downes;) 1833s) aera eee eee mene eects: |e) 220
September 30, 1914.
204 CALIFORNIA ACADEMY OF SCIENCES ([Proc. 4TH Ser.
HEL OLY =e Vc HRaan Cs seo eR NCOP So on UR NON vd Dek 226
Dry label ool G68 cesses ose re are Rees ere vel 226
Hassler, 1872....... =. 226
Cookson, 1875..... 2s) 220
“Challenger,” 1875...............
Webster-Harris, es
Snodgrass..and Ffeller; 1898-1800). oon... -c.scacesactecscssncceseseneseenre 234
Captain Noyes, 1900 nccsc.csssecsctecssceccoecestsscasttectecceestasteeestscussussaseeee
Beck, 1901 and 1902...................
Academy Expedition,
Present Stats: ..:-sc-ce.ccscccssessscceccsossse se.
Number Of: Races ss.222 cc cavescasccstceseecevsses a vaeencs es eeeaeasee eee
Living
Extinct - _
SYSTEMATIC ACCOUNT. 3 5siiscsccccncstcccccszonecensnscoesoactusncosssoscuceescedsoststhsedsssducouseceeceseees
D.,. INOMENGUATURE. <:.:csicvs-cecsesove cece scsctesaseccsesttsetcesecceesecusresseesnesaceremeearseestaee
Names: propoSe dic. i.cssncsncecec:.asciscwcsscosassscctsusnasttsteeoscossasdetocedera-az+duzesenetcte
DisctisSion Of MAWOS.vvieccsccescesccecceoesc}eavssesosedeiss:susieascassactchecsessestzsssivece 2A:
Testudo nigra.........--..-.
californiana
elephantopus ...
NU LIELG a nscninstasusussascassssenceetisadease tess satsrotaeeeewtstases
PIGMICE PS? e826 coas acenssnscsocsenctuctutansastosvesssbssaeentes3e2
ephippium ...
PRACT OP RV ES. — ccocsesssssccxecseacoscvccscnececmseresnoosteeesschdeseteateante ren
QCA) adcascccsceneticecsicv ss csc0exnsaecacaceatbeasceeds tanauasascscne sosszssamnae
galapagoensis .
giinthert ...
wallace .....
(Application ‘Of sma rie Stsssceceeseeeceecscesscresteseeeseceeeeeeen eterno sesnacaeeecee
De AD) AC G1s3 og 0) < Ka PEPERT eee Pe er eee ae Seer eee ee pee Tyee
Characters available for classification.
‘he: Shellie ccceceeeteetaeeee
Variation in plates
Wearlation itt Shape .serecsccccssccec ernst cerca ceeenerseeamsasesee
Meastirements, SOC) 22 cccecse cececcceczessene-tacsseemeeseeee
Charts of each measurement.. :
Tablet oh cAVeracesecccecrsssce esas meee meee eetereee ae 289
EEKEL ONTOS | coco eecccc-netecs sos eaneccennescamnenessyneansnananemannsen
Differences with age.
245
245
Veu. I, Pr. 1) VAN DENBURGH—GALAPAGOS TORTOISES 205
‘Dhe\jhead: necks aridplimbsseetnere sence nee. ce serene eres 291
Warlation® inl proportion Sic cscscctccsec stones epee eceetecaseezeteaeneanece
color
Osteologicall 5c 2 ee ee ew eee tarc eres eceeareoee
Key to the Galapagoan 'Races.. a. ncscteiissscnce-ctcccoceceessegesoteeenstes
Description of each Race......... ee
The (Saddle-backed) Racesiessssessescte os cace see
1. Testudo abingdom; Abingdon............22.....1-0-----
eas phantastica; Narborough. 3
3: becki; North Albemarle...........................-
4. ephippium; Duncan... ---..--0--- sce
5: hoodensis; Hood..........
6. elephantopus; Charles...
The Intermediate Races) ....2.22-0sscee------
7. Testado: darwin ames teres ee nce re cet
8. chathamensis; Chatham..................-.---..--+-
9. microphyes; Albemarle ,
10. gintheri; S. E. Albemarle...................... 335
11. vicina; South Albemarle.............02..........- 344
12. wallacei; Jervis..............-- coh!
The Dome-shaped Races..........-.-:::0-+--- ee 354
13. Testudo porteri; Indefatigable......................0--- 354
14. species ?; Cowley Mountain, Albemarle 362
‘ihe Unknowi! Ratez.tecce tener Alle RR ee eee 365
15. Testudo species ?; Barrington.. =
(GENERIAT,, | CONCLUSIONS tocseisicd.cedeczasessaccoeees cat rere ott ree ees ee ee es cec sce eanadsnceseseesoas 366
IBIBLTOGRAPEEYS: (5.6.5 -ioc saeco ce se oe ena ee ees a EYES 369
206 CALIFORNIA ACADEMY OF SCIENCES [Proc. 4rH Serr.
INTRODUCTION.
The gigantic land tortoises do not differ essentially, in any
other respect than in size, from the numerous small species
of the genus Testudo which exist in Europe, Asia, Africa, and
the Western Hemisphere. They are typical chelonians, modi-
fied, as are the other members of the genus, for a purely ter-
restrial life, but differing from the ordinary type in their
gigantic proportions. Even in size, however, there is no very
sharp line of division between the smallest adults of some
“gigantic” races and the largest individuals of certain species
that are not so designated.
The geological history of the gigantic tortoises is still but
fragmentary. We know that in the Tertiary period they were
far more widely distributed than during historic times. Their
remains appear as early as the Eocene, but become more num-
erous in Miocene and Pliocene formations. They have been
found in Nebraska and Wyoming, in France, Germany, Malta,
on the Lebanon, in the Sivalik Hills in India, and perhaps
also in Brazil. It thus appears that these huge tortoises were
formerly widely distributed over the earth; but it yet remains
to be shown whether these giant races are closely related one
to another, or have been independently developed from smaller
species in situations where climate and food and the absence
of enemies were most favorable to their growth.
In recent and historic times gigantic land tortoises have
existed only in certain isolated groups of islands in the Indian
and Pacific oceans, where the early explorers found them in
almost incredible numbers. The rapidity with which they
have disappeared from these islands upon the advent of man,
and even upon the advent of the smaller predatory mammals,
sufficiently explains their earlier extinction upon all the con-
tinents where they formerly occurred.
Although this paper will be immediately concerned only
with the tortoises native to the Galapagos Archipelago, in the
eastern Pacific, it will be well to review the history and distri-
bution of the tortoises of the islands of the Indian Ocean. I
therefore quote a few paragraphs from Dr. Gunther’s excel-
lent presidential address to the Linnean Society (1898).
Vor. II, Pr. 1] VAN DENBURGH—GALAPAGOS TORTOISES 207
“The historical evidence of their existence in Madagascar is
extremely scanty and vague. They had been cleared off from
the inhabited parts of the island at the time when the first
Europeans landed. If any of them had existed near the dis-
tricts occupied by the French settlers of the seventeenth cen-
tury, they would have been mentioned in some of the reports
on the natural productions of the country which these people
sent home. But their osseous remains, some in very perfect
condition and of comparatively recent appearance, show that
these animals were at one time widely spread over the island;
they are often found associated with bones of Zpyornithes,
Hippopotamus, cattle, and belong to two or three species.
Their extermination probably began with the arrival of man
in Madagascar; and it is highly improbable, though by no
means impossible, that some individuals have survived and
still linger in the vast tracts of country which are still unex-
plored.
“Very different were the conditions of life in the islands
which are scattered over the ocean in a semi-circle round the
north of Madagascar. With the exception of the Comoro
group, none of these islands were inhabited by man or large
mammals. Consequently the tortoises lived there in absolute
security for ages, and multiplied to a degree which excited the
admiration of all the early European visitors. They occupied
in incredible numbers not only the larger islands of the Aldabra
group, the Seychelles, Reunion, Mauritius, Rodriguez, but also
the small ones with an area of a few square miles only, and with
their highest points raised scarcely 100 feet above the level of
the water, provided that the coral soil produced a sufficient
amount of vegetation to supply them with food and shelter
from the sun. Of this we have not only the testimony of trust-
worthy voyagers of the last two centuries, but the direct evi-
dence of remains which accident now and then brings to the
surface. A short time ago I received from my friend, Dr.
Bruce, a resident at Mahe, to whom many a naturalist is
indebted for assistance and hospitality, the well-preserved egg-
shells of a gigantic land tortoise, imbedded in a conglomer-
ated mass of coral-sand. They came from a small island of the
Amirante group, on which Dr. Bruce formed a plantation of
Cocoanut-palms, and on which no tortoise had ever been known
208 CALIFORNIA ACADEMY OF SCIENCES [Proc. 41TH Ser.
to live. In order to secure the moisture requisite for germina-
tion and the growth of the seedling, it was necessary to plant
the nuts in pits dug through loose sand to a depth of about
three feet, and then through a crust of solidified coral-sand of
one foot thickness. It was below this crust that the eggs were
found, showing that probably centuries had elapsed since the
eges were deposited, and indicating at the same time that we
shall have to go below the surface, if we want to become
acquainted with the extinct autochthont races of these
islands.
“The sad history of the extermination of the Mascarene tor-
toises is so well known that I may dispense with a repetition of
its details. I will only allude to some facts with which I have
become recently acquainted. The tortoises, as you know, have
proved excellent and more wholesome food than the turtles.
Therefore every passing ship stowed away for her long voyage
as many as she could carry. With the increase of the popula-
tion of the settlements, augmented by military and naval forces,
the indigenous supply was rapidly exhausted; it was then sup-
plemented by importation from other islands; and we can
form an idea of the extent to which this inter-insular transport
was carried from official reports to the French Indian Company.
In 1759 four small vessels were especially appointed for the
service of bringing tortoises from Rodriguez to Mauritius; one
vessel carried a cargo of 6000; and altogether more than
30,000 were imported into Mauritius within the space of
eighteen months.
“The result of this prodigality was that, at the beginning of
our century, the tortoises had been pretty well swept off the
whole of the islands in the Indian Ocean, so that at the present
time only one spot remains where they have survived in a wild
state, viz., the south island of the Aldabran atoll. Although
only 18 miles long and about one mile wide, it offers by its
rugged, deeply fissured surface, which is overgrown with
impenetrable bush, a safe retreat to the small number of the
survivors. Aldabra has never been inhabited, and only
within recent years a station has been established on it for a
few men who are engaged in industrial pursuits for the lessee,
who rents the island from the Mauritian Government.”
Vou. II, Pr. 1) VAN DENBURGH—GALAPAGOS TORTOISES 209
Turning now to the islands of the Pacific Ocean we find evi-
dence of the natural existence of land tortoises only in the
Galapagos Archipelago.
The Galapagos Islands form a fairly compact group lying
under the equator, some five or six hundred miles west of the
coast of Ecuador. There are some twenty-four named islands,
and numerous islets and rocks. The principal islands are Albe-
marle, Indefatigable, Narborough, James, Chatham, Charles,
Hood, Bindloe, Abingdon, Barrington, Duncan, Tower and
Jervis. All are volcanic. There are said to be at least two
thousand craters, some of which, on the larger islands, are of
immense size, rising to a height of from three to four thousand
feet. A terrific eruption occurred on Narborough in 1825, but
no great volcanic activity has been reported in any of the
craters since 1835.
“Considering that these islands are placed directly under
the equator, the climate is far from being excessively hot; this
seems chiefly caused by the singularly low temperature of the
surrounding water brought here by the great southern polar
current. Excepting during one short season, very little rain
falls, and even then it is irregular; but the clouds generally
hang low. Hence, while the lower parts of the islands are
very sterile, the upper parts, at a height of a thousand feet
and upward, possess a damp climate and a tolerably luxuriant
vegetation. This is especially the case on the windward sides
of the islands, which first receive and condense the moisture
from the atmosphere.”
There is some uncertainty as to who first discovered the
Galapagos Islands. Some historians think it possible that
they may have been visited by the Inca, Tupac Yupangi, grand-
father of the Inca, Atahualpa, whom Pizarro put to death.
But however this may have been, there were no signs of human
habitation when the islands were discovered by Europeans in
the sixteenth century. The credit for this discovery, which is
said to have occurred on the 10th of March, 1535, has been
given to the Spaniard, Fray Tomas de Berlanga. The early
Spanish visitors found these islands occupied by tortoises in
such numbers that they applied to the group the Spanish term
for these creatures,—Galapagos.
210 CALIFORNIA ACADEMY OF SCIENCES [Proc. 4tH Ser.
During the latter part of the seventeenth, the eighteenth,
and the earlier part of the nineteenth centuries, the Galapagos
Islands were visited at more or less frequent intervals by buc-
caneers, whalers, adventurers, war-vessels, and others, in
search, often, of water and a supply of tortoises for food. To
these visits are due the earlier accounts of the tortoises of
these islands, as well as the specimens which, finding their way
into museums, have served as a basis for the original descrip-
tions of many species. It is difficult for us in these days of
rapid travel, when vessels are supplied with an endless variety
of canned foods, to appreciate the interest which the early
navigators, on their long, slow voyages, had in these animals,
which were easy of capture, could be stowed in numbers in
the hold of a vessel, kept for months without food, and were
used as needed to furnish an abundance of fresh meat. When
we are told that single vessels took on board at one time three
or four hundred tortoises, we cannot wonder that the number
remaining on the islands was rapidly reduced.
It was especially toward the end of the seventeenth century
that the Galapagos Islands were visted by buccaneers. Their
accounts have been quoted by Baur and Ginther. Cowley, Wa-
fer, and Dampier have given accounts of these visits, and Cow-
ley published a map of the islands. The first visit, by Cowley,
Cooke, Dampier, and Edward Davis, was in 1684. Davis,
Wafer, Knight and Harris were there again the next year, and
in 1687 Davis and Wafer made a third visit.
It is to Dampier that we owe the first account of the land
tortoises. He visited the Galapagos Islands several times, and
in his New Voyage Round the World, published in 1697,
tells us:
“The land-turtles are so numerous that five or six hundred
men might subsist on them alone for several months, without
any other sort of provision. They are extraordinary large
and fat, and so sweet that no pullet eats more pleasantly. One
of the largest of these creatures will weigh 150 or 200 weight,
and some of them are two foot, or two foot six inches, over the
callapee or belly.”
In a later edition of his Voyages Dampier states:
“The oil saved from them was kept in jars, and used instead
of butter to eat with dough-boys or dumplings. We lay here
Vor. I, Pr. 1] VAN DENBURGH—GALAPAGOS TORTOISES 211
feeding sometimes on land-turtle, sometimes on sea-turtle, there
being plenty of either sort; but the land-turtle, as they exceed
in sweetness, so do they in numbers; it is incredible to report
how numerous they are.”
The French Captain, de Beauchesne, visited these islands in
June, 1700, but his account is said to add nothing to the his-
tory of the land tortoises.
The best of the earlier accounts of the tortoises is that of
Woodes Rogers, who was in the Galapagos Archipelago in Sep-
tember, 1707. I quote as follows:
“Some of the largest of the land-turtles are about 100 pounds
weight, and those of the sea upwards of 400. The land-turtles
laid eggs on our deck. Our men brought some from the shore
about the bigness of a goose egg, white, with a large big shell,
exactly round. The creatures are the ugliest in Nature, the
shell not unlike the top of an old hackney-coach, as black as jet ;
and so is the outside skin, but shriveled and very rough. The
legs and necks are very long, and about the bigness of a man’s
wrist; and they have club-feet, as big as one’s fist, shaped
much like those of an elephant, with five thick nails on the
fore-foot and but four behind, and the head little, and visage
small like snakes, and look very old and bleak. When at first
surprised they shrink their neck, head, and legs under their
shell. Two of our men, with Lieutenant Stratton and the
trumpeter of the Duchess, affirm they saw vast large ones of
this sort, about four feet high. They mounted two men on
the back of one of them, which, with its usual slow pace, car-
ried them and never regarded the weight. They supposed this
could not weigh less than 700 pounds. I do not affect giving
relations of strange creatures so frequently done by others;
but when an uncommon creature falls in my way, I cannot
omit it. The Spaniards tell us, they know of none elsewhere in
these seas, but they are common in Brazil.”
Different islands were visited by Rogers. He continues:
“T saw no sort of beast, but there are guanos [iguanas] in
abundance, and land-turtles almost on every island. It is
strange how the latter got here, because they cannot come of
themselves, and none of that sort are found on the main.”
In 1720, Clipperton was for ten days in these islands. Van-
couver, who determined the position of some in 1795, did not
go to land.
212 CALIFORNIA ACADEMY OF SCIENCES [Proc. 41TH Ser.
Captain James Colnett, whose Voyage to the South Atlantic
was published in 1798, surveyed the Galapagos Archipelago in
1793. He was the first to mention the presence of tortoises on
Abingdon Island.
Amasa Delano first visited the Galapagos Islands in 1800
but returned there later. He reports tortoises still abundant
on Hood, Charles, James, and Albemarle islands. In his Nar-
rative of Voyages and Travels, published in Boston in 1817,
with a second edition in 1818, he says:
“The terrapin, or, as it is sometimes called, the land tortoise,
that is found here, is by far the largest, best, and most numer-
ous of any place I have ever visited. Some of the largest
weigh three or four hundred pounds, but their common size is
between fifty and one hundred pounds. They have a very long
neck, which, together with their head, has a very disagreeable
appearance, very much resembling a large serpent. I have
seen them with necks between two and three feet long, and
when they saw anything that was new to them, or met each
other, they would raise their heads as high as they could,
their necks being nearly vertical, and advance with their mouths
wide open, appearing to be the most spiteful of any reptile
whatever ; sometimes two of them would come up to each other
in that manner, so near as almost to touch, and stand in that
position for two or three minutes, appearing so angry that
their mouths, heads, and necks appeared to quiver with pas-
sion; when by the least touch of a stick against their necks or
heads, they would sink back in an instant, and draw their
necks, heads, and legs into their shells. This is the only quick
motion I ever saw them perform. I was put in the same kind
of fear that is felt at the sight or near approach of a snake at
the first one I saw, which was very large. I was alone at the
time, and he stretched himself as high as he could, opened
his mouth, and advanced toward me. His body was raised
more than a foot from the ground, his head turned forward in
the manner of a snake in the act of biting, and raised two feet
and a half above his body. I had a musket in my hand at the
time, and when he advanced near enough to reach him with it,
I held the muzzle out so that he hit his neck against it, at
the touch of which he dropped himself upon the ground and
instantly secured all his limbs within his shell. They are per-
Vor. I, Pr. I) VAN DENBURGH—GALAPAGOS TORTOISES 213
fectly harmless, as much so as any animal I know of, notwith-
standing their threatening appearance. They have no teeth,
and of course cannot bite very hard. They take their food into
their mouths by the assistance of the sharp edge of the upper
and under jaw, which shut together one a little within the
other, so as to nip grass, or any flowers, berries, or shrubbery,
the only food they eat.
“Those who have seen the elephant have seen the exact
resemblance of the leg and foot of a terrapin. I have thought
that I could discover some faint resemblance to that animal in
sagacity. They are very prudent in taking care of themselves
and their eggs, and in their manner of securing them in their
nests; and I have observed on board my own ship, as well as
on others, that they can easily be taught to go to any place on
the deck which may be fixed for them to be constantly kept in.
The method to effect this is by whipping them with a small
line when they are out of place, and to take them up and carry
them to the place arranged for them, which being repeated a
few times will bring them into the practice of going themselves,
by being whipped when they are out of their place. They can
be taught to eat on board a ship as well as a sheep or a goat,
and will live for a long time if there is proper food provided
for them. This I always took care to do when in a place where
I could procure it. The most suitable to take on board a ship is
prickly pear-trees, the trunk of which is a soft, pithy sub-
stance, of a sweetish taste, and full of juice. Sometimes I pro-
cured grass for them. Either of these being strewed on the
quarter-deck, the pear-tree being cut fine, would immediately
entice them to come from all parts of the deck to it; and they
would eat in their way as well as any domestic animal. I have
known them to live several months without food; but they
always in that case grow lighter and their fat diminishes, as
common sense teaches, notwithstanding some writers have
asserted the contrary. If food will fatten animals, to go
without it will make them lean.
“T carried at one time from James Island three hundred
very good terrapins to the island of Massa Fuero, and there
landed more than one-half of them, after having them sixty
days on board my ship. Half of the number landed died as
soon as they took food. This was owing to the stomachs
214 CALIFORNIA ACADEMY OF SCIENCES [Proc. 4tH Ser.
having got so weak and out of tone that they could not digest
it. As soon as they eat any grass after landing they would
froth at the mouth, and appeared to be in a state of insanity,
and died in the course of a day or two. This satisfied me that
they were in some degree like other animals, and only differed
from them by being slower in their motions, and that it takes a
longer time to produce an effect upon their system than upon
that of other creatures. Those that survived the shock which
was occasioned by this sudden transition from total abstinence
to that of abundance, soon became tranquil, and appeared to
be as healthy and as contented with the climate as when they
were at their native place, and they would probably have lived
as long had they not been killed for food. Their flesh,
without exception, is of a sweet and pleasant flavor as any that
I ever ate. It was common to take out of one of them ten or
twelve pounds of fat when they were opened, besides what was
necessary to cook them with. This was as yellow as our best
butter, and of a sweeter flavor than hog’s lard. They are the
slowest in their motions of any animal I ever saw except the
sloth. They are remarkable for their strength; one of them
would bear a man’s weight on his back and walk with him.
I have seen them at one or two other places only. One instance
was those brought from Madagascar to the Isle of France, but
they were far inferior in size, had longer legs, and were much
more ugly in looks than those of the Galapagos Islands. I
think I have likewise seen them at some of the Oriental Islands
which I visited.
“T have been more particular in describing the terrapin than
I otherwise should have been, had it not been for the many
vague accounts given of it by some writers, and the incorrect
statements made of the country in which it is to be found. The
frequent political comparisons and allusions which have been
made by our public papers and orators to this animal, may
have led the people of this country into incorrect notions con-
cerning them. It has been publicly said that terrapins are
common to China, which I am confident is incorrect; for I
have carried them to Canton at two different times, and every
Chinese who came on board my ship was particularly curious
in inspecting and asking questions about them, and not one, I
am positive, had any knowledge of the animal before.”
Vor. Il, Pr. FE} VAN DENBURGH—GALAPAGOS TORTOISES 915
During the War of 1812, Captain, afterward Admiral,
Porter of the United States navy, spent some time in the
Galapagos Archipelago. He has given, in his Journal of a
Cruise Made to the Pacific Coast, the most complete of the
earlier accounts of these tortoises. It was he who first called
attention to differences existing between the tortoises of the
different islands. Tortoises were found in greater or less
abundance in all the larger islands of the group which he
visited, viz.: Hood, Marlborough, James, Charles, and Inde-
fatigable (Porter’s) islands. On Chatham Island, where he
made a short stay, a few of their shells and bones were seen,
but they appeared to have been long dead; and on Albemarle
Island, the largest of the group, none was observed by him,
evidently because he landed here only a few hours on the south-
western point. Abingdon, Bindloe, Downe, and Barrington
islands were not visited by him. Some of the tortoises cap-
tured weighed from 300 to 400 pounds. On Indefatigable
Island land tortoises were in the greatest abundance, of an
enormous size, one of which measured five feet and a half long,
four feet and a half wide, and three feet thick, and others were
found by some of the seamen of larger size. On Hood Island
he obtained tortoises in great numbers. On another visit he
could not procure more than fifty tortoises, and they were
small, but ‘“‘of a quality far superior to those found on James
Island.” In regard to Charles Island he says :
“Tt abounds with tortoises, which frequent the springs for
the sake of the water, and upwards of thirty of them were
turned on their backs by us, as they came down to drink,
during the short time we remained there, which was not more
than an hour and a half. But we were enabled to bring down
only one, and he was selected more for his antiquated appear-
ance than for his size or supposed excellence. His weight was
exactly one hundred and ninety-seven pounds, but he was far
from being considered a large size. Later, between four and
five hundred were taken on board. They were brought the dis-
tance of from three to four miles, through thorns and over
sharp rocks, yet it was no uncommon thing for them to make
three and four trips a day, each with tortoises weighing from
fifty to a hundred weight.
216 CALIFORNIA ACADEMY OF SCIENCES [Proc. 4rm Ser.
“Although the parties in this employment (which were
selected every day, to give all an opportunity of going on
shore), indulged themselves in the most ample manner on tor-
toise meat (which for them was called Galapagos mutton),
yet their relish for this food did not seem in the least abated,
nor their exertions to get them on board in the least relaxed,
for everyone appeared desirous of securing as large a stock of
this provision as possible for the cruise.”
Two vessels captured by Porter—‘“‘had been in at James
Island, and had supplied themselves abundantly with these
extraordinary animals, the tortoises of the Galapagos, which
properly deserve the name of the elephant tortoise. Many of
them were of a size to weigh upwards of three hundred
weight. Numbers of them had been thrown overboard by the
crews of the vessels before their capture, to clear them for
action. A few days afterwards, at daylight in the morning, we
were so fortunate as to find ourselves surrounded by about
fifty of them, which were picked up and brought on board, as
they had been lying in the same place where they had been
thrown over, incapable of any exertion in that element, except
that of stretching out their long necks.”’
Two other English vessels captured later, had been only a
few days from James Island. Porter—‘found on board them
eight hundred tortoises of a very large size, and sufficient to
furnish all the ships with fresh provisions for one month.”
At another time Porter laid in a very large stock of tor-
toises from James Island.
“Four boats were dispatched every morning for this pur-
pose, and returned at night, bringing with them twenty to
thirty each, averaging sixty pounds. In four days we had as
many on board as would weigh about fourteen tons, which
was as much as we could conveniently stow. They were piled
up on the quarter-deck for a few days, with an awning spread
over to shield them from the sun, which renders them very
restless, in order that they might have time to discharge the
contents of their stomachs; after which they were stowed away
below, as you would stow any other provisions, and used as
occasion required. No description of stock is so convenient for
ships to take to sea as the tortoises of these islands. They
require no provisions or water for a year, nor is any farther
Vou. Il, Pt. 1) VAN DENBURGH—GALAPAGOS TORTOISES Oe
attention to them necessary, than that their shells should be
preserved unbroken. * * * The most of those we took
on board were found near a bay on the northeast part of the
Island, about eighteen miles from the ship. Among the whole
only three were male, which may be easily known by their
great size, and from the length of their tails, which are much
longer than those of the females. As the females were found
in low sandy bottoms, and all without exception were full of
eggs, of which generally from ten to fourteen were hard, it is
presumable that they came down from the mountains for the
express purpose of laying. This opinion seems strengthened
by the circumstance of there being no male tortoises among
them, the few we found having been taken a considerable dis-
tance up the mountains. One remarkable peculiarity in this
animal is, that the blood is cold. I shall leave it to those better
acquainted with natural history to investigate the cause of a
circumstance so extraordinary, my business is to state facts,
not to reason from them.
“Nothing, perhaps, can be more disagreeable or clumsy than
they are in their external appearance. Their motion resembles
strongly that of the elephant; their steps slow, regular and
heavy, they carry their body about a foot from the ground,
and their legs and feet bears no slight resemblance to the
animal to which I have likened them; their neck is from
eighteen inches to two feet in length, and very slender; their
head is proportioned to it, and strongly resembles that of a
serpent. But, hideous and disgusting as is their appearance, no
animal can possibly afford a more wholesome, luscious and
delicate food than they do; the finest green-turtle is no more
to compare to them in point of excellence than the coarsest beef
is to the finest veal; and after once tasting the Galapagos tor-
toises, every other animal food fell greatly in our estimation.
These animals are so fat as to require neither butter nor lard
to cook them, and their fat does not possess that cloying quality,
common to that of most other animals. When fried out, it
furnishes an oil superior in taste to that of the olive. The
meat of this animal is the easiest of digestion, and a quantity
of it exceeding that of any other food, can be eaten without
experiencing the slightest inconvenience. But what seems the
most extraordinary in this animal, is the length of time that it
218 CALIFORNIA ACADEMY OF SCIENCES [Proc. 4t Ser.
can exist without food; for I have been well assured that they
have been piled away among the casks in the hold of a ship,
where they have been kept eighteen months, and when killed
at the expiration of that time, were found to have suffered no
diminution in fatness or excellence. They carry with them a
constant supply of water, in a bag at the root of the neck,
which contains about two gallons, and on testing that found in
those we killed on board, it proved perfectly fresh and sweet.
They are very restless when exposed to the light and heat of
the sun, but will lie in the dark from one year’s end to the
other without moving. In the daytime, they appear remark-
ably quick-sighted and timid, drawing their head into their
shell on the slightest motion of any object; but they are
entirely destitute of hearing, as the loudest noise, even the
firing of a gun, does not seem to alarm them in the slightest
degree, and at night or in the dark they appear perfectly
blind. * * * The shells of those of James Island are
sometimes remarkably thin and easily broken, but more par-
ticularly so as they become advanced in age; when, whether
owing to the injuries they receive from their repeated falls in
ascending and descending the mountain, or from injuries
received otherwise, or from the course of nature, their shells
become very rough, and peel off in large scales, which renders
them very thin and easily broken. Those of Jemes Island
appear to be a species entirely distinct from those of Hood
and Charles islands. The form of the shell of the latter is
elongated, turning up forward in the manner of a Spanish
saddle, of a brown color and of considerable thickness. They
are very disagreeable to the sight, but far superior to those of
James Island in point of fatness, and their livers are consid-
ered the greatest delicacy. Those of James Island are round,
plump, and black as ebony, some of them handsome to the eye,
but their liver is black, hard when cooked, and the flesh alto-
gether not so highly esteemed as the others. * * * [The
tortoises of Hood’s Island] were of a quality far superior to
those found on James Island. They were similar in appearance
to those of Charles Island, very fat and delicious.”
Porter proceeded, after his cruise round the Galapagos, to
the Marquesas Islands, making a prolonged stay at Madison
[Rotumah] Island, where he “distributed from his stock sev-
Vor. II, Pr. 1] VAN DENBURGH—GALAPAGOS TORTOISES 919
eral young tortoises among the chiefs, and permitted a great
many to escape into the bushes and among the grass.”’
Captain Basil Hall found tortoises plentiful on Abingdon
Island in January, 1822.
Captain Benjamin Morrell, in 1823 and again in 1825,
hunted fur-seals in the Galapagos Archipelago, taking some
five thousand skins in about two months. He states that tor-
toises “grow to even a greater size than that mentioned by
Commodore Porter, as I have seen some that would weigh from
six to eight hundred pounds. They are excellent food, and
have no doubt saved the lives of thousands of seamen employed
in the whale-fishing in those seas, both American and English-
men. I have known whale-ships to take from six to nine
hundred of the smallest size of these tortoises on board when
about leaving the islands for their cruising grounds; thus pro-
viding themselves with provisions for six or eight months, and
securing the men against the scurvy. I have had these animals
on board my own vessels from five to six months without their
once taking food or water; and on killing them I have found
more than a quart of sweet fresh water in the receptacle which
nature has furnished them for that purpose, while their flesh
was in as good condition as when I first took them on board.
They have been known to live on board of some of our whale-
ships for fourteen months under similar circumstances, without
any apparent diminuation of health or weight.”
In February, 1825, Morrell observed a terrible eruption on
Narborough Island. One hundred and eighty-seven tortoises
were taken on Indefatigable between October 27 and Novem-
ber 10; 1825.
During all this time the Galapagos Islands remained with-
out permanent inhabitants, with the exception of an Irishman,
Patrick Watkins, who lived on Charles Island in 1809. It was
in 1832 that the first colony was established. This was due to
the exertions of J. Vilamil, who, although a native of Louis-
iana, had long been resident in Guayaquil, Ecuador. Political
difficulties delayed his enterprise some twenty years, but finally,
in 1831, the Government of Ecuador granted him a charter
conceding possession of the islands and authorizing the estab-
lishment of a colony.
September 30, 1914.
920 CALIFORNIA ACADEMY OF SCIENCES [Proc. 41TH Ser.
In January of the following year Colonel Hernandez, with
twelve colonists, was sent to take possession of Charles Island,
and settlers of both sexes followed in April and June. In
October, 1832, Vilamil himself, with eighty colonists, arrived
and “at once assumed his station as proprietor and governor
of the island.” The colony grew until it numbered several
hundred persons, many of whom, it is said, had been banished
from the mainland. These people and the domestic animals
introduced, many of which multiplied and roamed at large,
reduced the number of tortoises upon Charles Island so rapidly
and to such an extent that within three years the people were
obliged to send hunting parties to other islands to procure a
supply for food. This colony later was removed to Chatham
Island, where there still is a considerable settlement.
In 1833, Commodore John Downes visited Charles Island
in the U. S. Frigate “Potomac.” He obtained tortoises there,
and carried some to Boston.
In the year 1835 the Galapagos Islands, for the first time in
their history, were visited by a naturalist. In that year,
Charles Darwin, during the voyage of the “Beagle,” spent the
weeks from September 15 to October 20 in this archipelago.
In his classical Journal he has given by far the best account of
the habits of the tortoises that has been written.
“The ‘Beagle’ sailed around Chatham Island, and anchored
in several bays. One night I slept on shore on a part of the
island, where black truncated cones were extraordinarily numer-
ous: from one small eminence I counted sixty of them, all sur-
mounted by craters more or less perfect. The greater number
consisted merely of a ring of red scoriz or slags, cemented
together: and their height above the plain of lava was not
more than from fifty to a hundred feet: none had been very
lately active. The entire surface of this part of the island
seems to have been permeated, like a sieve, by the subter-
ranean vapors: here and there the lava, while soft, has been
blown into great bubbles; and in other parts, the tops of
caverns similarly formed have fallen in, leaving circular pits
with steep sides. From the regular form of the many craters,
they gave to the country an artificial appearance, which vividly
reminded me of those parts of Staffordshire where the great
iron foundries are most numerous. The day was glowing hot,
Vor. II, Pr. 1] VAN DENBURGH—GALAPAGOS TORTOISES 291
and the scrambling over the rough surface and through the
intricate thickets was very fatiguing; but I was well repaid by
the strange Cyclopean scene. As I was walking alone I met
two large tortoises, each of which must have weighed at least
two hundred pounds: one was eating a piece of cactus, and as
I approached, it stared at me and slowly stalked away; the
other gave a deep hiss, and drew in its head. These huge rep-
tiles, surrounded by the black lava, the leafless shrubs, and
large cacti, seemed to my fancy like some antediluvian animals.
The few dull colored birds cared no more for me than they
did for the great tortoises.
“The ‘Beagle’ proceeded to Charles Island. This archi-
pelago has long been frequented, first by the buccaneers, and
latterly by whalers, but it is only within the last six years that
a small colony has been established here. The inhabitants are
between two and three hundred in number: they are nearly ail
people of color, who have been banished for political crimes
from the Republic of the Equator, of which Quito is the capital.
The settlement is placed about four and a half miles inland, and
at a height probably of a thousand feet. In the first part of the
road we passed through leafless thickets, as in Chatham Island,
Higher up, the woods gradually became greener; and as soon
as we crossed the ridge of the island we were cooled by a fine
southerly breeze, and our sight refreshed by a green and thriv-
ing vegetation. In this upper region coarse grasses and ferns
abound ; but there are no tree-ferns: I saw nowhere any mem-
ber of the Palm family, which is the more singular as, 360
miles northward, Cocos Island takes its name from the number
of cocoanuts. The houses are irregularly scattered over a flat
space of ground, which is cultivated with sweet potatoes and
bananas. It will not easily be imagined how pleasant the sight
of black mud was to us, after having been so long accustomed
to the parched soil of Peru and northern Chile. The inhabi-
tants, although complaining of poverty, obtain, without much
trouble, the means of subsistance. In the woods there are
many wild pigs and goats; but the staple article of animal
food is supplied by the tortoises. Their numbers have of
course been greatly reduced in this island, but the people yet
count on two days’ hunting giving them food for the rest of
the week. It is said that formerly single vessels have taken
222 CALIFORNIA ACADEMY OF SCIENCES [Prog 4tH Ser.
away as many as seven hundred, and that the ship’s company
of a frigate some years since brought down in one day two
hundred tortoises to the beach.
“October 8th.—We arrived at James Island: this island, as
well as Charles Island, were long since thus named after the
kings of the Stuart line. Mr. Bynoe, myself, and our servants
were left here for a week, with provisions and a tent, while the
‘Beagle’ went for water. We found here a party of Spaniards,
who had been sent from Charles Island to dry fish and to salt
tortoise-meat. About six miles inland, and at the height of
nearly 2,000 feet a hovel had been built in which two men lived,
who were employed in catching tortoises, while the others
were fishing on the coast. I paid this party two visits, and
slept there one night. As in the other islands, the lower
region was covered by nearly leafless bushes, but the trees were
here of a larger growth than elsewhere, several being two feet
and some even two feet nine inches in diameter. The upper
region being kept damp by the clouds supports a green and
flourishing vegetation. So damp was the ground that there
were large beds of coarse Cyperus, in which great numbers of
a very small water-rail lived and bred. While staying in this
upper region we lived entirely upon tortoise-meat: the breast-
plate roasted (as the Gauchos do carne con cuero), with the
flesh on it, is very good; and the young tortoises make excellent
soup ; but otherwise the meat to my taste is indifferent. * * *
“Of sea-turtle I believe there is more than one species; and
of tortoises there are, as we shall presently show, two or three
species or races.
“I have not as yet noticed by far the most remarkable
feature in the natural history of this archipelago; it is, that
the different islands to a considerable extent are inhabited by a
different set of beings. My attention was first called to this
fact by the Vice-Governor, Mr. Lawson, declaring that the
tortoises differed from the different islands, and that he could
with certainty tell from which island any one was brought. [
did- not for some time pay sufficient attention to this state-
ment, and I had already partially mingled together the col-
lection from two of these islands. I never dreamed that
islands, about fifty or sixty miles apart, and most of them in
sight of each other, formed of precisely the same rocks, placed
Vor. II, Pr. 1) VAN DENBURGH—GALAPAGOS TORTOISES 223
under a quite similar climate, rising to a nearly equal height,
would have been differently tenanted; but we shall soon see
that this is the case. It is the fate of most voyagers, no
sooner to discover what is most interesting in any locality
than they are hurried from it; but I ought, perhaps, to be
thankful that I obtained sufficient materials to establish this
most remarkable fact in the distribution of organic beings.
“The inhabitants, as I have said, state that they can distin-
guish the tortoises from the different islands; and that they
differ not only in size, but in other characters. Captain
Porter has described those from Charles and from the nearest
island to it, namely, Hood Island, as having their shells in
front thick and turned up like a Spanish saddle, while the
tortoises from James Island are rounder, blacker, and have a
better taste when cooked. M. Bibron, moreover, informs me
that he has seen what he considers two distinct species of tor-
toise from the Galapagos, but he does not know from which
islands. The specimens that I brought from three islands were
young ones; and probably owing to this cause, neither Mr.
Gray nor myself could find in them any specific differences.
“T will first describe the habits of the tortoise (Testudo
nigra, formerly called Indica), which has been so frequently
alluded to. These animals are found, I believe, on all the
islands of the archipelago; certainly on the greater number.
They frequent in preference the high damp parts, but they
likewise live in the lower and arid districts. I have already
shown, from the numbers which have been caught in a single
day, how very numerous they must be. Some grow to an
immense size: Mr. Lawson, an Englishman, and Vice-Governor
of the colony, told us that he had seen several so large that
it required six or eight men to lift them from the ground; and
that some had afforded as much as two hundred pounds of
meat. The old males are the largest, the females rarely grow-
ing to so great a size; the male can readily be distinguished
from the female by the greater length of its tail. The tor-
toises which live on those islands where there is no water, or
in the lower and arid parts of the others, feed chiefly on the
succulent cactus. ‘Those which frequent the higher and damp
regions eat the leaves of various trees, a kind of berry (called
guayavita) which is acid and austere, and likewise a pale
924 CALIFORNIA ACADEMY OF SCIENCES [Proc. 4TH Ser.
green filamentous lichen (Usnea plicata) that hangs in tresses
from the boughs of the trees.
“The tortoise is very fond of water, drinking large quan-
tities and wallowing in the mud. The larger islands alone
possess springs, and these are always situated toward the cen-
tral parts, and at a considerable height. The tortoises, there-
fore, which frequent the lower districts, when thirsty, are
obliged to travel from a long distance. Hence broad and well-
beaten paths branch off in every direction from the wells down
to the sea-coast; and the Spaniards, by following them up,
first discovered the watering places. When I landed at Chat-
ham Island, I could not imagine what animal traveled so
methodically along well-chosen tracks. Near the springs it
was a curious spectacle to behold many of these huge creat-
ures, one set eagerly traveling onward with outstretched necks,
and another set returning, after having drunk their fill, When
the tortoise arrives at the spring, quite regardless of any spec-
tator, he buries his head in the water above his eyes, and
greedily swallows great mouthfuls, at the rate of about ten in
a minute. The inhabitants say each animal stays three or four
days in the neighborhood of the water, and then returns to
the lower country; but they differed respecting the frequency
of these visits. The animal probably regulates them according
to the nature of the food on which he has lived. It is, how-
ever, certain that tortoises can subsist even on those islands
where there is no other water than what falls during a few
rainy days in the year.
“T believe it is well ascertained that the bladder of the frog
acts as a reservoir for the moisture necessary to its existence:
such seems to be the case with the tortoise. For some time
after a visit to the springs, their urinary bladders are dis-
tended with fluid, which is said gradually to decrease in vol-
ume, and to become less pure. The inhabitants, when walking
in the lower district, and overcome with thirst, often take
advantage of this circumstance, and drink the contents of the
bladder if full: in one I saw killed, the fluid was quite limpid,
and had only a very slightly bitter taste. The inhabitants,
however, always first drink the water in the pericardium,
which is described as being best.
Vor. II, Pr. 1] VAN DENBURGH—GALAPAGOS TORTOISES 925
“The tortoises, when purposely moving toward any point,
travel by night and day, and arrive at their journey’s end
much sooner than would be expected. The inhabitants, from
observing marked individuals, consider that they travel a
distance of about eight miles in two or three days. One large
tortoise, which I watched, walked at the rate of sixty yards
in ten minutes, that is 360 yards in the hour, or four miles a
day—allowing a little time for it to eat on the road. During
the breeding season, when the male and female are together,
the male utters a hoarse roar or bellowing, which, it is said,
can be heard at the distance of more than a hundred yards.
The female never uses her voice, and the male only at these
times; so that when the people hear this noise they know that
the two are together. They were at this time (October)
laying their eggs. The female, when the soil is sandy, deposits
them together, and covers them up with sand; but when the
ground is rocky she drops them indiscriminately in any hole:
Mr. Bynoe found seven placed in a fissure. The egg is white
and spherical; one which I measured was seven inches and
three-eighths in circumference, and therefore larger than a
hen’s egg. The young tortoises, as soon as they are hatched,
fall a prey in great numbers to the carrion-feeding buzzards.
The old ones seem generally to die from accidents, as from
falling down precipices: at least several of the inhabitants
told me that they had never found one dead without some
evident cause.
“The inhabitants believe that these animals are absolutely
deaf; certainly they do not overhear a person walking close
behind them. I was always amused when overtaking one of
these great monsters, as it was quietly pacing along, to see
how suddenly, the instant I passed, it would draw in its head
and legs, and uttering a deep hiss fall to the ground with a
heavy sound, as if struck dead. I frequently got on their
backs, and then giving a few raps on the hinder part of their
shells, they would rise up and walk away—but I found it very
difficult to keep my balance. The flesh of this animal is
largely employed, both fresh and salted; and a beautifully
clear oil is prepared from the fat. When a tortoise is caught,
the man makes a slit in the skin near its tail, so as to see
inside its body, whether the fat under the dorsal plate is thick.
996 CALIFORNIA ACADEMY OF SCIENCES [Proc. 41H Sep.
If it is not, the animal ts liberated; and it is said to recover
soon from this strange operation. In order to secure the tor-
toises, it is not sufficient to turn them like turtle, for they are
often able to get on their legs again.
“There can be little doubt that this tortoise is an aboriginal
inhabitant of the Galapagos; for it is found on all, or nearly
all, the islands, even on some of the smaller ones where there
is no water; had it been an imported species, this would hardly
have been the case in a group which has been so little fre-
quented. Moreover, the old buccaneers found this tortoise in
greater numbers even than at present: Wood and Rogers also,
in 1708, say that it is the opinion of the Spaniards that it is
found nowhere else in this quarter of the world.”’
The visit of the French frigate “Vénus,” from June 21 to
July 15, 1838, needs merely to be mentioned; while that of
the English “Herald,” from January 6 to 16, 1846, is chiefly
of interest because of the statement of its naturalist, B. See-
mann, that ‘“‘no turpin, or terrapin, are living’ on Charles
Island where wild dogs, pigs, goats and cattle had increased
wonderfully. Terrapin or galapago were bought on Chatham
Island at the rate of six shillings apiece, and were two feet
two inches in length, one foot ten inches broad, and stood one
foot two inches off the ground.”
Dr. Kinberg in the Swedish vessel “Eugenie,” in 1852, col-
lected reptiles on Charles, Chatham, Indefatigable, James and
Albemarle islands. Nothing of importance was discovered
regarding the tortoises. The same may be said concerning the
researches of Dr. Habel, who, from July 22, 1868, to January
1, 1869, made collections of birds, fishes, snakes, lizards,
insects, mollusks, and radiates on Abingdon, Bindloe, Hood,
and Indefatigable islands.
From June 10 to 19, 1872, the Hassler Expedition, under
Professor Louis Agassiz, collected chiefly fishes, at Charles,
Albemarle, Indefatigable, James, and Jervis islands. It is
said that a female tortoise was purchased by Professor Agassiz
on Charles Island.
In the year 1875, Commander Cookson of the British navy,
visited the Galapagos in the “Peterel.’’ He obtained tortoises
on Albemarle and Abingdon islands. The following notes are
extracted from his report to Rear-Admiral Cochrane who, at
Vor. Il, Pr. I] VAN DENBURGH—GALAPAGOS TORTOISES 227
the suggestion of Dr. Gunther, had instructed him to obtain
the desired information and specimens.
“These tortoises are extinct in Charles Island; and only a
very few individuals are supposed to survive on Chatham
Island. In Hood, James, and Indefatigable islands the num-
bers are so reduced that they are no longer hunted, the few
left being in the most inaccessible parts of the islands; and I
was assured that a search of a fortnight might not result in
finding a single individual on either of these islands. Albe-
marle and Abingdon are the only remaining islands in which
they have ever been found. In parts of Albemarle Island
they are still very abundant, especially at the south-east end.
“They are still tolerably numerous near Tagus Cove. Land-
ing a party of twenty-four men about half a mile south-east
of Tagus Cove, we found in a few hours thirty tortoises; the
three largest weighed respectively 241 pounds, 185 pounds,
and 173 pounds; these, I was told, were as large as they are
commonly found now.
“Tagus Cove is a favorite resort of whalers for the purpose
of getting tortoises. The anchorage is perfectly secure; and
the custom is for almost the entire crew to be landed until as
many tortoises are secured as can be conveniently taken on
board, some whalers going to sea with as many as 100.
“We found a good trail leading from the landing-place (at
one of the gullies before mentioned as having pools of fresh
water at its mouth) to the ground where tortoises are found,
a distance of about three miles; quantities of tortoise-shells
and traces of fires showed the numerous camping-grounds.
“Tortoises were never, I believe, very abundant on Abing-
don Island: our searching party found four on this island.
They were on the high ground; and it was a work of great
labour getting them down to the boats. The distance was
about four miles; but the ground was exceedingly rugged,
and covered with thick brush, through which a trail had to be
cut for the entire distance. The largest found on this island
weighed 201 pounds, and the smallest 135 pounds.
“Tn consequence of the extent of Albemarle Island, and the
inaccessibility of many parts of it, I have no doubt these
animals are still very numerous on it, and likely to be so for
a long period, even at the present rate at which they are
928 CALIFORNIA ACADEMY OF SCIENCES [Proc. 41H Ser.
destroyed; but I have already shown the havoc made amongst
them by the oil-makers. This is the cause of their being
nearly extinct on James and Indefatigable islands, where they
used to be so numerous. Admiral Fitzroy found a party on
James Island making oil in 1835.
“In Abingdon Island, where they are not numerous, I
believe they are doomed to destruction directly the orchilla-
pickers are placed on the island; for a party of sixty or eighty
men will soon hunt over this small island and discover every
individual on it.”
The “Challenger” reached the Galapagos Islands shortly
after the “Peterel.’’ It carried home some of the tortoises
secured by Commander Cookson, but obtained no additional
information.
In April (4-16), 1888, the United States Fish Commission
steamer “‘Albatross’’ collected reptiles on Albemarle, Charles,
Chatham, Duncan, and Indefatigable islands. Tortoises were
secured on Albemarle and Duncan. A second visit by the
“Albatross” with Professor A. Agassiz, from March 28 to
April 4, 1891, resulted in no new information concerning tor-
toises.
On June 10, 1891, Dr. George Baur and Mr. C. F. Adams
reached the Galapagos Islands. They remained until Septem-
ber 6 of the same year, and collected on Albemarle, Abingdon,
Bindloe, Barrington, Charles, Chatham, Duncan, Hood, Inde-
fatigable, James, Jervis, and Tower islands. Tortoises were
found only on Duncan and in southern Albemarle. Twenty-
one specimens were collected—eight on Duncan and thirteen
from southeastern Albemarle.
Acting for the Hon. Walter Rothschild, Mr. Frank B. Web-
ster, in 1897, organized an expedition to search for tortoises in
the Galapagos Archipelago, under the leadership of Mr. C. M.
Harris. The original party having been broken up at Panama
by the death from yellow fever of three of its five members, a
second party was gathered at San Francisco, where Harris
had chartered the “Lila and Mattie,’ a small schooner com-
manded by Captain Linbridge. Those composing the collect-
ing force of the second party were Mr. Harris, Mr. F. P.
Drowne, Mr. G. D. Hull, and Mr. R. H. Beck. They set sail
from San Francisco June 21, and arrived at the Galapagos
Vor. II, Pr. I] VAN DENBURGH—GALAPAGOS TORTOISES 9229
Islands July 25, 1897. Collections were made on Culpepper,
Wenman, Abingdon, Bindloe, Indefatigable, Duncan, Jervis,
James, Barrington, Chatham, Hood, Charles, southeastern
Albemarle, Tagus Cove, Narborough, and Tower islands. Set-
ting sail from Tower Island December 28, 1897, the return to
San Francisco was accomplished February 8, 1898. Tortoises
were secured only from southeastern Albemarle and from
Duncan islands. The following extracts from Mr. Drowne’s
journal tell the difficulties overcome in collecting tortoises on
Duncan Island:
“Sept. 5, 1897. After a long walk I arrived at the edge
of the crater at about 11 a.m. Harris was already inside. We
climbed down the side, I should say 250 feet, and reached the
bottom, which was level and covered all around with thick
bushes on the border. Grass, 2 feet high or more, covered
the entire centre. Geospiza, Certhidea, and Camarhynchus
were abundant, and occasionally Pyrocephalus and Myiarchus
were seen. Soon after reaching the bottom I heard Harris
calling out that he had caught a tortoise. Hull and myself
got there as soon as possible, and we tied the tortoise up.
The grass was full of tortoise trails, and we set out in search
of others. Harris found two more, and Hull and myself each
two. We turned them all over, and weighted them down with
heavy rocks. After fixing the last one, we revisited the first
and found it loose. This made it necessary to revisit the
others, which we did, finding that they had all got loose. We
weighted them down again with more and heavier rocks, and
returned to the starting-place. Some of the tortoises which
we found feeding were eating the blossoms from a creeping
vine, rising upon their forelegs and stretching their necks out
to full extent. The odor from them reminded me very much
of that from an elephant. After tramping about so much and
lifting so many heavy rocks, we were very tired, but had to
brace up and climb out of the crater, and walk to the shore
over a long distance of broken rock. The crater was quite
three-quarters of a mile in diameter, with a very flat bottom,
surrounded by a high wall or embankment, making it resemble
greatly pictures of the old Roman amphitheaters. Arrived on
board at 6:30, very tired and very thirsty.
230 CALIFORNIA ACADEMY OF SCIENCES [Proc. 4rm Szr.
“Sept. 7.—Another hard day’s work. Got up at 4:45 a. Mm.
and started to heave up anchor. Sailed over to Duncan Island.
Had breakfast at 6:30, and went ashore soon after, starting
immediately up to the crater, with poles, ropes, etc., to get the
tortoises out. Managed to recover our tortoises of last Sunday,
some of which had got away. Found one dead, a rock having
fallen on his neck during his struggles and shut off his wind.
Found one more, making a total of eight. The work of
making them fast lasted till about 2 o’clock, when we started
for the shore with a tortoise strung on a pole between each
two men, one of the sailors and myself taking one. It was
very hard getting them up the side of the crater, walking
being so rough and thorns so plentiful. But this was nothing
to be compared with going down on the other side, which was
very steep and terrible walking. The sailor had on a pair of
wooden clogs, which soon began to chafe his feet. After a
long time spent in tumbling over lava blocks, tearing through
thorn bushes and other such pleasantries, we reached a point
as near the shore as we could, tied the creatures up securely,
and left them. Now came a long walk before we could get
to the skiff. We were all so tired, having had nothing to eat
since breakfast, that the distance seemed terribly long. It was
a rough road, up and down, over broken lava and through
thorns. Reached the skiff about 6 Pp. M., every one being well
tired out. A good drink of wine and water was served with
the lunch that was in the boat. We got aboard the schooner
a little later. This was the hardest day’s work thus far, with
the possible exception of last Sunday’s. The trip was very
hard on the tortoise also, and they acted as if ‘played out.’
Two of them being set down close together got their poles
somewhat tangled up, and by the way they opened their
mouths at each other it looked as if they were going to have a
fight.
“Sept. 8.—We went ashore quite early, and started immedi-
ately for the crater, after looking in vain for more tortoises
for a short time. The mate took a small one on his back.
Harris and myself, Hull and Beck carried one swung on a
pole between us, and we started for the boat by a much easier
route than yesterday, and got two of them right aboard the
skiff. The other one and the three brought down yesterday
Vor. H, Pr. 1] VAN DENBURGH—GALAPAGOS TORTOISES 931
were tied up in a sack, one at a time, and then lowered down
to the skiff from the top of a bluff 75 feet high. Getting them
into the skiff, at 4 p. M. we were aboard the schooner with six
live tortoises. The small one which was found yesterday
appeared to be nearly dead when visited today. The soil at the
bottom of the crater is full of cracks in places, showing that
probably during the wet season there is water there. There
were several rocks with depressions in their tops, and the
prints of tortoise feet near them showed that the animals
probably relied on these places for their supply of water during
the dry season. It rained last Sunday while we were in the
crater, and in one of these holes quite a little water had col-
lected.
“Sept. 9.—Went ashore at about 8 a. M., or rather started
at that time, it being a long pull to the island. Harris, Hull,
and Beck carried the guns, while the mate and a sailor (Her-
man Jahnke) and myself were to bring down the two tor-
toises. We got into the crater at about 11 a. M.; picked up
the bones of a tortoise that had been found some time before.
We saw a snake that was about 1% ft. long, slender and
blackish, with white rings. The mate noticed it first and
called me, but I only arrived in time to see it disappearing
under the grass, from which we were unable to dislodge it.
The mate was afraid of snakes. We ate lunch in the crater.
Just as we were commencing, Harris brought in a small tor-
toise which had escaped last Sunday, the one first caught.
The mate claimed that this one bit him while he was tying
it up. After lunch we started out of the crater, a sailor and
myself carrying the large dead one on a pole, and the mate the
live one in a pack on his back. We got down to the bluff m
good time, when we lowered them down, and then climbed
down ourselves. At a little after 4 p. mM. the rest of the party
appeared, bringing in another dead tortoise and the small live
one, the sack of bones, and some birds. Beck carried a big
tortoise from the other side of the island, and reported seeing
five others in a gulch on the other side of the crater, three of
them being larger than any secured thus far. He said that one
of the big ones was feeding on an old dead cactus. We got
on board after a long pull, and started over to Conway Bay,
where we anchored at 7 Pp. M.
232 CALIFORNIA ACADEMY OF SCIENCES [Proc. 4tH Ser.
“Sept. 13.—Got up at 4:30, and, after having coffee, hoisted
anchor and set the sails. Weather very foggy, and fine rain.
We sailed over to Duncan, went ashore rather late, and all
hands started at once for the crater, the idea being to work
over the other side of it, and look for the tortoises that Beck
had seen as well as others. We found in one of the craters
(a section so thickly covered with bushes that it had not been
so carefully examined) a good-sized tortoise. This find altered
the plans somewhat. The mate and the sailor took the tortoise
on a pole, I a sack of bones and their surplus baggage, and
after eating lunch started back, the others having gone on.
We reached the skiff after a long walk, the others arriving at
about the same time. They reported six tortoises tied up, and
the remains of another found. We got aboard the vessel about
6 p. M., and sailed for Conway Bay, coming to anchor at 7 :30.
“Sept. 16.—Arose at 5 a. mM. and had breakfast; then both
parties started for the first station with a big tortoise. Reach-
ing there, the mate and myself started down for the beach
after water and provisions, there being only half a canteen of
water to leave the others for their morning’s work. We got
to shore in 50 minutes, and started immediately to pack up.
The mate took the five-gallon breaker of water, and I the
knapsack, well loaded with canned fruit, meat, sardines, bread,
sugar, butter, coffee, rice, etc., and three canteens of water.
We started back right in the heat of the day, and the mate’s
load soon exhausted him. We decided that I should go ahead
and get to the boys with the water in the canteens, while he
came on by short stages. I reached the camp about 1 P. M.,
very tired by the long walk in the sun. Beck and Hull had
carried out three tortoises to the first station. We lunched,
and later the mate reached the camp. Hull and myself got a
good-sized tortoise into the camp in the afternoon (the farthest
away), while Beck brought in a little one on his shoulder. A
little later Beck and myself took one of the big ones around
the trail to the first station, while Hull brought another little
one into the camp, and the mate got several. We sat around
the camp-fire awhile after supper, and then retired.
“Sept. 18.—Arose about 5 a. M., it being then quite rainy.
After breakfast we got the tents, blankets, etc., packed up, and
started for the shore, Beck and the mate each taking a little
Vor. II, Pr. I] VAN DENBURGH—GALAPAGOS TORTOISES 933
tortoise, while Hull and myself carried the tents, etc., all on a
pole. Arrived at the shore, after quite a short rest we started
up again to bring down some more tortoises. Beck and the
mate went up again after dinner, bringing down two more.
Meantime Hull and myself got the stuff packed up, the tor-
toises in the boat, and things arranged for leaving. We then
took the skiff, leaving the camp outfit ashore, as we were to
return on Monday. The schooner had left Conway Bay some
time before, and was quite close by the island; and in a short
time we were all on board with our seven tortoises.
“Sept. 20.—Went ashore quite early. We pitched tents and
went up to the first station; brought down two tortoises half
way, ate a little lunch we had taken up with us, and took a
short rest. We went up to the first station again and brought
the tortoises down to the shore. The mate cooked a good
supper of rice, coffee, meat (canned corned beef), and bread
and butter, canned fruit for dessert. We sat around the camp-
fire till 8 o’clock. The seals kept up a continual noise all night.
“Sept. 21.—Had an early breakfast, and all went to the first
station. The mate and myself brought a tortoise down to the
camp (moved down to shore). While Hull and Beck brought
one half way and returned for another, mate and myself ate
lunch, then went to half-way station and brought another one
down to the shore. Meantime Beck and Hull got theirs down.
It was getting late in the afternoon, so we lay off for the
remainder of the day.
“Sept. 22.—Got up early. After breakfast we went up to
the half-way station and brought down two tortoises; went up
again immediately and brought down two more. Had dinner
and took a rest. At about 3 Pp. M. we went up again and
brought down two more, which made the last of the twenty-
nine tortoises from Duncan Island.
“Sept. 23—Did not get up quite as early. After breakfast
I worked a little around the beach, turning over rocks for
marine animals; then secured several lizards. We got the
eleven tortoises down on the beach. We then put six into
the skiff, together with the outfit. Beck steering, the mate and
myself pulled to the vessel, which had come over from Conway
Bay. We got aboard all right, and shortly after the rest of
the tortoises and Hull were taken aboard. Then we headed orf
234 CALIFORNIA ACADEMY OF SCIENCES [Proc. 4TH Ser.
for Jervis, and anchored at the north side of the island at 5
p. M. We are doubtful if more than two or three tortoises
are left on Duncan Island, because our party covered practi-
cally all the part of the island where they would be found.
“Sept. 24.—Went ashore on Jervis Island. Fine beach, with
a little lagoon right behind it, around the edge of which we
found tracks of a tortoise, but were unable to find it after
thoroughly searching the island. There is more soil on this
island than on any visited thus far. We secured about 115
birds in all.”
In the fall of 1898, the Department of Zoology of Stanford
University sent to these islands two collectors, Mr. Robert E.
Snodgrass and Mr. Edmund Heller. Sailing on the sealing
schooner “Julia E. Whalen,” they were given an opportunity
to collect on every island of the group. Their visit extended
from December 10, 1898, to June 26, 1899. Some twelve hun-
dred reptiles were collected. Tortoises were found only on
Duncan Island and at Tagus and Iguana Coves, Albemarle
Island. Heller thought them extinct on all the other islands
except Abingdon. He gives the following account of the
habits, based on observation of the three species collected, viz.,
Testudo microphyes, T. vicina and T. ephippium:
“Their food consists of various species of grasses and cactus
(Opuntia). During the rainy season, and in the moist portions
of the islands the year round, grass forms their chief food.
especially a large, woody-stemmed, perennial species. During
the dry season in the arid portions of the islands, as at Tagus
Cove, Albemarle, and on Duncan Island, the Opuntia becomes
quite an important food plant. The green succulent leaf-like
stems of this cactus and its fruit, the prickly pear, are eagerly
devoured by the tortoises, regardless of the sharp spines with
which they are armed. One specimen collected near Tagus
Cove had the whole palate and pharynx bristling with the
cactus spines, from which there was apparently no suffering.
The juicy cactus stems supply the tortoises with the necessary
water in the dry regions where springs are absent, and thus
make possible its existence in such localities. Cactus seems to
be preferred, when it can be easily secured; all the tortoises
we took on board the schooner would take no other kind of
food except when compelled by hunger. The Opuntia are tree-
Vor. II, Pr. I] VAN DENBURGH—GALAPAGOS TORTOISES 935
like in habit, growing usually to a large size, and it is only the
young and smaller plants that are within reach of the tortoises.
Grass can be secured much easier, and it is perhaps due to this
fact that it forms a larger proportion of their food.
“The tortoises do a great deal of apparently unnecessary
traveling ; and, though slow, are so persistent in their journeys
that they cover several miles a day. Most of the traveling is
done early in the morning and late in the afternoon, the hot
hours of noon being spent in the shade of some bush, wallow-
ing in the damp soil. The wallowing probably cools them, and
incidentally relieves them of a few of the numerous wood ticks
(Amblyoma pilosum) which infest them at the joints and wher-
ever the skin is thin enough to allow them to pierce it. After
heavy rains they delight to wallow in the mud. They are very
determined travelers, and once started in a certain direction no
obstacles can stop them. Not infrequently they ascend very
steep, rocky hills. Sometimes their shells are broken, and
occasionally they are killed, by rolling down these inclines, but
if uninjured after these falls they will make repeated efforts to
reascend until crowned by success. They retire early for the
night, drawing in their limbs and neck, and after sunset do
not move from the place chosen for the night. Darwin, how-
ever, states that they travel both day and night when on their
periodical visits to the springs.
“All three of the species we observed make seasonal vertical
migrations. Soon after the rainy season they descend the
mountains to the grass-covered flats at their bases, to feed and
deposit their eggs in the light soil. After the grass has with-
ered, they again ascend the mountains to the moist meadows
produced by the trade winds at an elevation of 2,000 feet and
above. These migrations are most marked in the dry regions,
as at Tagus Cove, Albemarle; but even at Iguana Cove on the
same island, where there is an abundance of moisture at lower
elevations, a nearly complete migration takes place. On Dun-
can Island the tortoises scatter out so in the dry season that
their movements can scarcely be called a vertical migration.
In their seasonal pilgrimages they follow well-established trails
used perhaps for generations. These trails radiate from the
higher plateaus as a center and usually follow the floors of
the canyons to the flats below. Some of the trails are of
September 30, 1914.
2936 CALIFORNIA ACADEMY OF SCIENCES [Proc. 4rH Ser.
considerable length, requiring several days of persistent ef-
fort on the part of the tortoise to cover them.
“When surprised they draw in their limbs and necks with a
deep hiss, and suspend operations until they think the danger
past. No amount of noise seems to frighten them and the
Ecuadorians assert that they are deaf. A small one, however,
taken at Iguana Cove, Albemarle, learned to recognize the
voice of its keeper in a few months, and would come to the
gate of its pen when called though the keeper was hidden from
its sight.
“The males are sometimes quarrelsome, especially in the
breeding season. In fighting the jaws are opened widely, and
the animals, raised by outstretched necks and limbs to their
greatest height, attack one another. Superior height seems
to be quite an advantage in a combat, allowing the taller to
bite down upon the head of his adversary. In these fights
they seldom succeed in doing much damage. When turned
over on their backs they right themselves by swinging their
limbs all in the same direction, which causes the animal to
rotate and clear the ground, so that by thrusting out their
long necks to the ground and pushing with them the body
falls over on the plastron. During this operation they usually
indulge in much grumbling and groaning as if it were a terri-
ble tax on their anatomy. During the breeding season the
males are said to ‘bellow like bulls.’ The ‘bellowing’ which
we heard consisted of a rather low prolonged note which could
not have been heard more than a few yards away.
“The young do not take on their specific characters until
nearly adult; they remain very similar in shape, in all the
species for a considerable time. All the young observed pos-
sessed striated shells, but adults seem to retain or lose this
character indifferently in most of the species.
“Growth takes place by additions to the outer border of each
plate along the soft white seams, and probably continues as
long as life exists; the largest specimens possess the whitish
seams which mark the growing edges of the plates. In youth
the annual increase is probably much greater than later. A
specimen from Iguana Cove, weighing 29 pounds when taken,
doubled its original weight in twelve months, accompanied
by an increase to the margin of each plate of the carapace of
Vor. I, Pr. I] VAN DENBURGH—GALAPAGOS TORTOISES 937
about half an inch or an inch to the diameter of the plate. Its
total gain during the year was: in length of carapace, four
inches; in breadth, three inches; and in height, one and one-
fourth inches. During the colder winter months the consump-
tion of food was greatly lessened and growth correspondingly
retarded. The increase in weight during the summer months
amounted to nearly three pounds monthly. This tortoise now
[1902] weighs 130 pounds, having gained 100 pounds in three
years. This rapid increase may be abnormal, but it shows
how rapid their growth may be under favorable conditions of
food and warmth, which we believe are even more favorable in
the Galapagos where no cool winter season retards their
growth.”
In 1900 Captain Noyes again visited the Galapagos Archi-
pelago. He searched for tortoises on Duncan Island, but
found only four; and stated that he thought no more would
be found there. In the southern part of Albemarle, however,
he had better luck, securing nineteen tortoises. These were
delivered to Mr. Frank B. Webster, who sent seven of them to
Rothschild. Mr. Webster states:
“In all about a hundred and twenty-five tortoises from the
Galapagos Islands have passed through my hands, the great
majority of which were for the Honorable Walter Rothschild.
I consider, now that these creatures are so nearly extinct, that
any remaining ones will be only stragglers, and will only be
secured at a great expense of time, hardship and money.”
Early in 1901, Mr. Beck returned to the Galapagos Islands
to hunt for tortoises for Mr. Rothschild. One small specimen
was taken on Indefatigable February 16, 1901. Duncan
Island yielded five tortoises. Three were taken at Tagus
Cove, and one at Cape Berkeley, Albemarle Island, and two
were secured on Abingdon. The single specimen from Cape
Berkeley proved to be a new species and was named by Roths-
child Testudo becki.
In November of the same year, Mr. Beck again visited the
Galapagos Islands, in the little schooner “Mary Sacks.’’ He
returned to San Francisco August 15, 1902, with twenty-three
dead and twenty-seven living tortoises. Eight or nine of these
were from Indefatigable, six from Bank’s Bay, three from
Tagus Cove, five from Iguana Cove, and the rest from Vilamil.
938 CALIFORNIA ACADEMY OF SCIENCES [Proc. 4TH Ser.
These tortoises also went to Rothschild’s museum at Tring,
England. Mr. Beck has published in the seventh report of the
New York Zoological Society some interesting notes on the
habits of the tortoises. He says, in part:
“The tortoise seemed to have no regular time for feeding,
being at all hours of the day eating or walking about. During
the middle of the day, if the sun is shining, they keep in the
shade of the trees, but 1f it is cloudy many spend the time wan-
dering back and forth on the trails. We were told by the
natives that in the summer the tortoises go up to the top of
the mountain; and this statement confirmed my observations
of similar habits of other species in the Archipelago.
“We found that the tortoise trails extend up and down the
[ Vilamil] mountain side for miles, one of the objective points
at the lower part of the range being a rocky basin where
water collects during rains. By centuries of constant use
these rocks have been worn so smooth that it is almost impos-
sible to walk over them after a rain, while they are wet. Once
we noticed four tortoises slaking their thirst at a rocky pool
near the trail, but during our stay at the ranch the rainfall was
so great that every little hollow in the ground held water, and a
tortoise could get a drink anywhere.
“One afternoon, while standing under a tree during a heavy
downpour, I was surprised to see a big tortoise come slowly
down the hill through the wet grass, walk into a rapidly-
forming pool of water, take a long drink, and then lie down in
the pool. When he settled down, the depth of the water was
only two inches; but in a few minutes it had increased to eight
inches; and he seemed entirely content, until his attention was
attracted to a female tortoise, which also came to the pool to
drink. That attraction was the stronger, so he left the water
and set out to make her acquaintance.
“After the rain had ceased, I went down the trail some dis-
tance and saw another tortoise living in a hollow filled with
water. He remained there all night, apparently, for on our
return the next morning he was still in it. These two observa-
tions rather tended to disprove mv theory regarding one of
the causes of the annual migration which affects nearly all the
species of the Galapagos tortoises. I had formed the opinion
that the migration was partly due to the slightly colder
Vor. Il, Pr. I] VAN DENBURGH—GALAPAGOS TORTOISES 939
weather and heavy rains high up on the mountains during the
winter season, but it would seem from the actions here cited
that these causes have but little to do with it after all. With
this species (Testudo vicina), it might be the mating instinct
that causes them to wander down three or four miles from
their summer home.
“Love affairs were in full progress during our stay [March
20 to April 2], and the amorous exclamations of the males
could be heard at a distance exceeding 300 yards, even in the
thick forest. The actions of the tortoises living in the hollows
and small valleys along the mountain top were very similar to
those of the cattle that occupied the same range. Walking
cautiously over a rise we would see perhaps three or four at 2
water-hole, drinking, and dispersed in the open valley would be
others busily nibbling at the short grass. During the heat of
the day many would be seen lying in the shallow pools of
water that the heavy rains had formed, or under the bushes
near by them. One hot day I saw two large tortoises and two
young bulls lying side by side under a small tree. Nearby were
other cattle, and another large tortoise was headed for the
tree, having just left a water-hole a few rods away.
“After seeing on this mountain dozens of tortoises of good
size, one wonders where the small ones are; but after spending
a few days a-foot and seeing the many wild dogs in that
region—descendants of those left years ago by sailing vessels—
we can only wonder that so many of the large ones remain.
From the time that the egg is laid until the tortoise is a foot
long, the wild dogs are a constant menace, and it is doubtful if
more than one out of 10,000 escapes. We certainly saw none,
and the natives told us that the dogs ate them as fast as they
were hatched.
“In November, 1897, we found several nests in the lower
edge of the forest. Of these, two had been rifled, and the
broken egg-shells were what first attracted our attention to
them. All the eggs found on that date (November 12th) were
perfectly fresh, and we saw two or three newly dug holes
with tortoises but a few feet from them. Most of the nests
found were in well-traveled cattle or tortoise trails. They
were so placed that the sun shone on them but a few hours
each day; when it did it was very hot. Ordinarily it was very
240 CALIFORNIA ACADEMY OF SCIENCES [Proc, 4rw Ser.
difficult to recognize the site of a nest, the very slight elevation
in the trail, or slightly fresher-looking earth being our sole
guide. Several times we imagined that we had discovered
nests, and prodded about with our sticks and dug with our
hands, until finally we realized that we had misinterpreted the
signs.
“On finding our first nests in the trail, the old adage, “Don’t
put all your eggs into one basket,’ was forcibly brought to
mind, This is the rule that is followed by the tortoise, for
within a radius of 15 feet four nests were found, each contain-
ing 8 to 17 eggs. The holes were about 15 inches in depth,
and nearly a foot in diameter. The eggs were placed in layers
of 3 to 6, the first layer being on the soft soil on the bottom,
separated from the next by an inch or so of dirt, and the sec-
ond layer separated from the third in the same manner. The
dirt surrounding the eggs was loose, but the top of the hole
was covered to a depth of 3 or 4 inches with a very hard crust
that had probably been formed by the tortoise lying on it and
working from side to side in the same manner that we fre-
quently noticed them working down a form to lie in.
“Judging by the size and number of the eggs found in sev-
eral of the tortoises that we dissected, it would seem that one
or two nests are finished at a given period, and a week or two
later the remainder of the eggs are laid. From 10 to 20 eggs
were ready for extrusion together, while 20 or 30 more were
from one-half to two-thirds the normal size.
“At the rate of destruction now in progress it will require
but a few years to clear this entire mountain of tortoises; and
when we see the methods pursued by the proprietor in getting
tortoise oil for shipment to the mainland, we know that the
large tortoises can last but a few months after the work of the
oil-hunter begins in earnest.
“To show what has already been done by oil-hunters, I took
two photographs at the water-hole, where lay the largest num-
ber of tortoise skeletons. There were about 150 skeletons at
this pool, and a half mile away, in another depression, were
about 100 more. While there were more skeletons at these
two places than we saw elsewhere, frequently 10 or 15 were
observed in other basins where the tortoises had gone for
water.
Vor. II, Pr. 1] VAN DENBURGH—GALAPAGOS TORTOISES 941
“The outfit of the oil-hunter is very simple, consisting merely
of a can or pot in which to try out the oil, and three or four
burros for carrying the five- or ten-gallon kegs in which it is
transported to the settlement. After making a camp near a
water-hole, and killing the tortoises there, the collector brings
up a burro, throws a couple of sacks over the pack-saddle, and
starts out to look for more tortoises, killing them wherever
found. A few strokes of the machete separate the plastron
from the body, and 10 minutes’ work will clear the fat from
the sides. The fat is then thrown into the sack, and the outfit
moves on.
“When the burro is well laden, man and beast travel back
to camp, where the oil is tried out. Each large tortoise yields
from one to three gallons of oil. The small ones are seldom
killed, because they have but little fat. By daily visits to the
few water-holes during the driest season, in the course of a
month the hunters get practically all the tortoises that live on
the upper part of the mountain.
“When we first stepped ashore at the settlement we saw a
number of casks lying on the beach, and learned on inquiry
that they contained 800 gallons of tortoise oil. In a large
boat, under a nearby shed, were 400 gallons more. While we
were there, the boat sailing between the island and Guayaquil
left for the port with those casks and a cargo of hides. The
value of the oil in Guayaquil was about $9.00 (American) per
100 pounds. While the tortoises are so plentiful as we saw
them, this price yields a fair profit to the hunters, but two
more raids such as that shown in the photograph will
clear that mountain of all the fair-sized tortoises upon it, and
then the oil business is ended.”’
The statements of the various authors to whom we have
referred, indicate that tortoises had been found upon Abing-
don, James, Duncan, Indefatigable, Chatham, Charles, Hood,
and Albemarle islands; that they remain in considerable num-
bers only in parts of Albemarle, and perhaps Duncan; that
they reached the verge of extinction on Charles Island as
early as 1846; and that none had been seen in recent years
upon James, Chatham, Charles, or Hood island.
It was largely for the purpose of gathering further informa-
tion regarding tortoises that an expedition was sent to the
942, CALIFORNIA ACADEMY OF SCIENCES [Proc. 41rH Ser.
Galapagos Archipelago by the California Academy of Sciences.
This expedition set sail from San Francisco on the twenty-
eighth of June, 1905, in the schooner “Academy,” which had
been purchased and rechristened for the purpose. The scien-
tific staff of the expedition consisted of eight young men. Mr.
R. H. Beck, who has had more experience in these islands
than any other collector—this being his fourth expedition to
them—was in charge. Mr. Alban Stewart went as botanist;
Mr. W. H. Ochsner, as geologist; Mr. F. X. Williams, as
entomologist; while Mr. E. W. Gifford and Mr. J. S. Hunter
were to study and collect the birds, and my assistant, Mr. J. R.
Slevin, with the aid of Mr. E. S. King, was to care for the
reptiles.
Having made brief stops at various islands near the coast of
Lower California, as well as at San Benedicto, Socorro, Clip-
perton, and Cocos islands, the party reached the Galapagos
Archipelago and landed upon Hood Island, September 24,
1905. During the months which followed. the most arduous
collecting was vigorously carried on in all the islands of the
group, many of the larger being visited several times, and
on September 25, 1906, after a full year of work, the “‘Acad-
emy” left Culpepper Island and set sail for San Francisco,
where she arrived in safety Thanksgiving day, November 29,
1906.
This exploration met with far greater success than I had
anticipated. Tortoises, or their remains, were found for the
first time on Barrington, Jervis, and Narborough islands, and
on Cowley Mountain, Albemarle Island. They were also found
still living in all the localities from which they had ever been
recorded except Charles Island, where they appear, as on Bar-
rington, to be really extinct. Only on Duncan Island and the
southern portion of Albemarle were they encountered in con-
siderable numbers, and in the latter region they are being
rapidly reduced by the raids of the natives who kill them for
meat and oil.
It was Captain Porter who first called attention to. the fact
that each of the tortoise-bearing islands of the archipelago
had its own peculiar race or species. With the exception of
Albemarle, no island has more than one kind of tortoise. Now
there is evidence that Albemarle, the largest island of the
Vout. II, Pr. 1] VAN DENBURGH—GALAPAGOS TORTOISES 943
group, has been formed by the union of several smaller islands,
corresponding, probably, to its five great volcanoes. Accord-
ingly, we find on Albemarle five distinct races of tortoises,
each of which, I believe, originated upon one of these con-
stituent volcanoes prior to their union. If this view be cor-
rect, some of these races have since spread to other portions
of Albemarle Island, but each race still is found either in
greatest numbers or alone upon that portion of the island
where it originated. Thus one finds at Bank’s Bay, in the
northern part of Albemarle, a kind of tortoise not found else-
where. The region about Tagus Cove, in north-central Albe-
marle, has tortoises of but one race, which race, however,
seems to occur also on the southern coast of Albemarle. The
same is true of Iguana Cove, while on Vilamil Mountain and in
the adjoining portions of the island is found still another race,
which does not occur elsewhere. The Cowley Mountain tor-
toise seems nearly identical with that of Indefatigable Island;
but this conclusion is based upon a single female specimen, not
adult, and I believe that a good series of specimens would lead
to a different result.
The present state of our knowledge indicates, then, that
there once lived in the Galapagos Archipelago fourteen or
fifteen distinct races of gigantic land tortoises, each occupying
its own island, as follows:
ISLAND PRESENT STATUS
eA iri dota ate. ccn eens ace ke SA ee aeetecs esac Rare
25) James” 2. ...Rare
35 Jervis: ..:: ....Very rare
AMD UNCATIN) eae es ...Fairly abundant
Senlindetatigable! (2440 eee ...Not rare
6. Barrington ..... ....Extinet
do Chatham) --.. ...Nearly extinct
8. Hood ....... ...Very rare
OW Charles! Sf sess sic ee Oe Se ehcclees Extinct
LOWyNarboroug hii. 22 ae ee SE er eace seat caea Very rare
Ie Valamil; “Albemarle: <2. ...-Abundant
....Numerous
...Fairly numerous
12. Iguana Cove, Albemarle -
13. Tagus Cove, Albemarle ...
14. Bank’s Bay, Albemarle
15. Cowley Mt., Albemarle
It now becomes necessary to consider what names are appli-
cable to these various races.
244 CALIFORNIA ACADEMY OF SCIENCES [Proc. 4TH Ser.
SYSTEMATIC ACCOUNT
1. NOMENCLATURE
Eighteen names have been proposed for Galapagos tortoises,
as follows:
DATE NAME AUTHORITY LOCALITY
1. 1824—Testudo migra 20.2... Quoy & Gaimard “California”
2. 1824—Testudo californiana .........Quoy & Gaimard
3. 1827—Testudo elephantopus ........Harlan Galapagos
4. 1835—Testudo nigrita ...........- ...Dumeril & Bibron No locality
5. 1855—Testudo planiceps .... ....Gray No locality
6. 1875—Testudo ephippium .. ....Gunther No locality
7. 1875—Testudo microphyes ....Gtinther No locality
8. 1875—Testudo vicina .......... ...Gunther No locality
9. 1877—Testudo abingdonit ...... ....Gunther Abingdon
10. 1889—Testudo galapagoensis ....... Charles
11. 1889—Testudo giintheri.......... = No locality
12. 1901—Testudo beck ......... ....Rothschild North Albemarle
13. 1902—Testudo wallacei ....Rothschild No locality
14. 1904—Testudo porteri ..... ....Rothschild Indefatigable
15. 1907—Testudo hoodensis ...
16. 1907—Testudo darwini ....... ...Wan Denburgh James
17. 1907—Testudo chathamensis ........Van Denburgh Chatham
18. 1907—Testudo phantasticus ........ Van Denburgh Narborough
...Wan Denburgh Hood
Eight of these names are based upon specimens whose ori-
gin is definitely known. There can be no question as to the
races to which these names apply. The other ten, however,
were proposed, often with vague descriptions from examples
which leave much to be desired in respect both to history and
to condition. It will be necessary to consider each of these
names in turn to determine, if possible, its proper use.
1. Testudo nigra Quoy & Gaimard. 1824
This name was applied by Quoy and Gaimard, in 1824, to
a very young tortoise presented to M. de Freycinet by Captain
Meek, of the “Boston Eagle,” while the “Uranie” and “Phy-
sicien’’ were in the Sandwich Islands, and said to have come
from California. Owing to the small size of this tortoise the
differential characters are not developed. Rothschild, who re-
cently examined the type in the Paris Museum, writes! that
it “is a young tortoise with a carapace barely 10% inches
long, and so indifferently preserved that it is absolutely impos-
1Novitates Zool., IX, 1902, p. 618.
Vor. Il, Pt. I] VAN DENBURGH—GALAPAGOS TORTOISES 245
sible to say to what race it belongs. Dr. Albert Giinther, who
examined the specimen with me, is even more emphatic on
this point than I am.” The exact locality of origin being
unknown, I think it impossible ever to decide which species it
represents, and therefore follow Gunther, Baur and Rothschild
in ignoring the name Testudo nigra.
2. Testudo californiana Quoy & Gaimard. 1824
This name, also proposed by Quoy and Gaimard in 1824,
evidently was based upon the specimen which they described
as Testudo nigra. It is therefore a substitute name.
3. Testudo elephantopus Harlan. 1827
This name was first used by Dr. Richard Harlan in a paper
published in the Journal of the Academy of Natural Sciences of
Philadelphia, in 1827, and afterward reprinted in Harlan’s
Medical and Physical Researches (1835). The description
was based upon a living specimen in the possession of Mr.
Whitton Evans. Beyond the mere fact that it was from the
Galapagos Islands, Dr. Harlan said nothing of the origin of
this tortoise.
In 1874, Dr. Giinther, recognizing the fact that Harlan’s
specimen belonged to one of the broad races, associated with
the name Testudo elephantopus certain specimens of indefinite
origin. The carapace which he figured is depressed, with some-
what elevated front, width over curve greater than length over
curve, height to marginals low, and pectoral plates well
developed.
In 1889, after having examined a specimen which he thought
was the one described by Harlan, Dr. George Baur? stated his
conclusion that the specimens which Dr. Gtinther had referred
to Testudo elephantopus did not belong to the species repre-
sented by Harlan’s type. It is probable that the specimen Baur
examined is a South Albemarle tortoise of the vicina type, for
Baur states that “a number of specimens collected by the ‘Alba-
tross’ agree exactly with” this specimen “and the T. vicina of
Gunther.”
2Am. Naturalist, Dec. 1889, p. 1043.
2946 CALIFORNIA ACADEMY OF SCIENCES [Proc. 4TH See.
Later, Rothschild borrowed this specimen which Baur had
examined and, having studied it, concluded® that it was not
the same as Gtinther’s Testudo elephantopus, and that it was
identical with Ginther’s Testudo vicina. He, moreover, held
that Gtinther’s Testudo elephantopus was the same as Harlan’s,
and, a little later,’ expressed the opinion that it came from
Hood Island.
We have, therefore, to consider three questions :
1.—Is T. elephantopus from Hood Island?
2.—Is Gunther’s T. elephantopus the same as Harlan’s?
3.—lIs it possible to determine what race Harlan’s specimen
represented ?
These I shall endeavor to answer in the order in which
they are given.
1.—I think it may be stated postively that neither Harlan’s
nor Gunther’s Testudo elephantopus came from Hood Island.
Both are of the broad form, in which the width over the curve
exceeds the length over curve, while in the Hood Island race
the curved length exceeds the curved width. There are also
other points of difference.
2.—I feel equally positive that the specimen figured by Dr.
Gunther is not identical with Harlan’s species. The chief
points of distinction are: Giuinther’s specimen has the height
to marginals low, while, if one may judge from his plate,
Harlan’s specimen belonged to one of those races in which
this measurement is great. Giinther’s specimen has the anterior
portion of the carapace expanded, while in Harlan’s there is
at least an approach to the laterally compressed, “saddle-
backed” form. Gutnther’s specimen, moreover, has a greater
straight width than Harlan’s, and there are minor points
which also lead to the conclusion that the two belong to differ-
ent races. The identity of the specimen figured by Ginther
will be considered under the heading Testudo giintheri Baur.
3.—Inasmuch as Harlan did not know that there existed in
the Galapagos Islands more than one kind of tortoise, his de-
scription is brief and couched in terms so general as to render
3Novitates Zool., IX, 1902, p. 448.
4Loc, cit., p. 618.
Vor. II, Pr. I] VAN DENBURGH—GALAPAGOS TORTOISES 947
it very difficult to determine positively from it which race his
specimen represented. This being true, the fate of Harlan’s
specimen becomes of much interest, since only from it can we
obtain the desired data. Unfortunately, there is little doubt
that this specimen no longer exists. Baur,® it is true, men-
tions examining Harlan’s original specimen in the Philadelphia
Academy of Natural Sciences, but the specimen to which he
refers does not agree with the description or measurements
given by Harlan, and, indeed, has never been regarded as
Harlan’s type by the authorities of the Academy. At my re-
quest, Dr. Arthur E. Brown has been kind enough to look the
matter up, and, while the Philadelphia Academy has no com-
plete records of its museum in those early days, he has found
in an early volume of the Journal, in the list of donations in
February, 1827, mention of a “Testudo elephantopus from
Richard Harlan, M. D.” As this was only five months after
Harlan’s paper was read, it seems fair to presume that the
specimen presented was the one which had served as the basis
of his description. With Mr. Witmer Stone, Dr. Brown then
“made a careful search through a lot of odds and ends of old
material, with the result that we found the cleaned leg bones
of one side, and a part of the legs of the other side with dried
skin still on them, of a Testudo about the size of Harlan’s type,
with an index number (366) making it almost certain that it
came from Harlan.” Dr. Brown says, “In the opinion of both
Mr. Stone and myself, these fragments are probably all that 1s
left of the type of T. elephantopus, which had apparently been
mounted, but long ago became dismembered, leaving only these
scraps which do not bear any of the specific characters.”
It therefore seems fairly certain that no one ever will know
from the specimen itself what Harlan’s Testudo elephantopus
really was, and that any opinion must be based upon the meager
data to be derived from Harlan’s original description and plate.
I have already stated that I believe these to be scarcely adequate.
The points of value in this connection are: that it was a young
individual, probably a female, with elevated central areas and
concentric ridges on the plates, pectoral plates meeting exten-
sively on the median line—therefore not from Chatham Island ;
breadth over curve (22.6) greater than length over curve
5Am. Naturalist, Dec. 1889, p. 1043.
CALIFORNIA ACADEMY OF SCIENCES [Proc. 4TH Ser.
248
(21.6)—therefore, considering its size,6 not from Hood, Ab-
ingdon, Bank’s Bay, Narborough, Tagus Cove, James, Chat-
ham, or Duncan; vertical diameter nine inches; lateral diam-
eter fourteen inches; marginals reflected upward anteriorly and
over limbs; height to marginals apparently great—therefore
not from Chatham, Tagus Cove, Bank’s Bay, nor Narborough;
front of carapace elevated—therefore not from Indefatigable
Island nor Cowley Mountain, Albemarle.
In the foregoing list we have excluded most of the races
of the Galapagos Archipelago. Of all the localities where tor-
toises ever had been found in the archipelago up to the date
of the visit of the present expedition, there remain to be con-
sidered only two—Charles Island and southern Albemarle.*
I doubt if it be possible to decide with certainty from either
the description or the plate whether Harlan’s type came from
Charles Island rather than from Albemarle; but there is other
evidence which throws some light upon the question. First,
there is the circumstance that most of the early voyagers se-
cured their tortoise from Charles, James, and Hood islands.
Second, Porter stated in his journal that the tortoises of Hood
Island were similar in appearance to those of Charles Island,
the form of the shell being elongate and turned up forward
in the manner of a Spanish saddle. Third, Harlan’s plate
strikingly resembles my specimens from Hood Island, although
his measurements show that he had a different and much
broader species. Fourth, the few specimens in collections which
can be pretty definitely traced to Charles Island agree with
Harlan’s specimen in having the length over the curve less
than the breadth over the curve.
I hold, therefore, that Harlan’s specimen came from Charles
Island, although we cannot positively prove this to have been
the case. This being true, the name Testudo elephantopus
cannot be used for the distinct race to which Giinther applied
it.S Some might think it best not to use the term at all, sub-
6The young are narrower than the adults, so that this statement is true, although
in some of the races here enumerated adult individuals may have the curved width
greater than the curved length.
7The shape of the carapace of the tortoise found on Jervis Island is quite dif-
ferent from Harlan’s plate of 7. elephantopus, and although the carapace of the Bar-
tington Island tortoise is unknown, I think that these islands may safely be ignored
as possible places of origin of Harlan’s specimen, for the reason that tortoises had
never been found upon them by any of the earlier explorers.
8See Testudo gintheri infra.
Vor. II, Pr. I] VAN DENBURGH—GALAPAGOS TORTOISES 949
stituting for it Baur’s later but more definite name Testudo
galapagoensis; but to me the evidence seems sufficiently con-
clusive to justify the retention of Harlan’s excellent name for
the Charles Island tortoise.
4. Testudo nigrita Duméril & Bibron. 1835
Regarding this name I quote from Gunther:
“No doubt can possibly be entertained as regards the cor-
rect application of this name to the species which I am about
to describe. It had been given by Duméril and Bibron (Er-
pétol. Génér. II, p. 80) to two examples, of which the smaller,
very young one, is in the Paris Museum, whilst the larger, but
also of young age, is the property of the Royal College of
Surgeons. Bibron’s description is almost entirely drawn up
from the latter specimen, which, therefore, must be regarded
as the type.”
Giinther associated with this specimen a large carapace, with-
out plastron, belonging to the British Museum. Nothing is
known regarding the origin of these specimens. Gunther
figured both the type and large carapace, and states that both
probably were males. Study of the plates and measurements
given has developed no reason for doubting the correctness
of Gtnther’s conclusion that these two specimens represent
the same species of tortoise.
Since the original specimens of Duméril and Bibron repre-
sent animals too young to have developed distinctive specific
characters, the attempt to determine to which particular race
the name Testudo nigrita should apply must rest upon the
adult specimen with which Giinther later associated it. This
specimen has the following measurements :
Straightilen ppl si.ccns ies terenee ones 39.25 inches
Straight width ...... 33250 ii a 85%
Length over curve.... e071) Mon Z9%,
WA dEHVOVeET: (CUVie tnceeeerh ereeeeee ee BA) MP 133%)
Wiidthat 2-3d! marginals). eels ss 53%
Unfortunately this specimen is incomplete. There remains
only the upper shell. However, the circular outline and the
ereat height of the dome-shaped carapace are so characteristic
that I have no hesitation in expressing the opinion that it
250 CALIFORNIA ACADEMY OF SCIENCES [Proc. 41TH Ser.
must represent one of two very similar races. These races
are the one characteristic of Indefatigable Island, and that
found upon Cowley Mountain in central Albemarle. The ques-
tion then arises, to which of these can the name Testudo ni-
grita be applied.
The differences between the Cowley Mountain tortoise and
those of Indefatigable are very slight. Indeed, there is no
measurement of the former which cannot be duplicated in
some specimen from Indefatigable Island. However, the
curved length and the width between second and third mar-
ginals are less, and the middle height and difference between
curved length and curved width are greater, than is usual in
the Indefatigable tortoise. If we take, then, the percentages
of these measurements and add the first two (the curved
length plus width at second to third marginals), and subtract
from this the sum of the other two measurements, we have
as the result 111, a figure which always is exceeded when we
combine in the same way the measurements of any Indefatiga-
ble tortoise.
The fact that I have only one tortoise from Cowley Moun-
tain, of course, renders unsafe the conclusion that we have
here two distinct races; but, on the other hand, the fact that
my 23 specimens from Indefatigable all are alike in this dif-
ference from the Cowley specimen gives that conclusion con-
siderable weight.
Unfortunately, we cannot know the middle height of Giin-
ther’s specimen, but the other measurements enable us to say
that it agreed with the Indefatigable tortoises and was unlike
the Cowley specimen, unless it had a middle height greater
than in any other specimen of any race of Galapagos tortoise.
We seem justified, then, in saying that Gtinther’s Testudo
nigrita agrees with the Indefatigable tortoise. When, in ad-
dition, it is recalled that the early tortoise-hunters frequented
Indefatigable Island, but rarely visited Albemarle, I can see
no good reason for doubting that this specimen really came
from Indefatigable, and that it belongs to the race which re-
cently has been called Testudo porteri. However, since con-
clusions based upon an imperfect specimen of unknown origin
must always be open to some question, and especially since
this specimen is not the original type upon which the name was
Vor. Il, Pr. I] VAN DENBURGH—GALAPAGOS TORTOISES 951
established, it seems best to pass over the name Testudo ni-
grita, and to use for the Indefatigable Island race the name
Testudo portert.
5. Testudo planiceps Gray. 1855
This name was established for a skull of unknown origin.
Dr. Gtnther regarded it as representing the race previously
named Testudo nigrita. The name has since appeared only
in the synonymy of that tortoise.
6. Testudo ephippium Ginther. 1875
The original description of this species was published hy
Dr. Gunther, in 1875, in the Philosophical Transactions. It
was based upon a single specimen of unknown origin belong-
ing to the Edinburgh Museum of Science and Arts. Because
Porter’s remarks on the tortoises of Charles Island applied so
well to this specimen, Dr. Giinther was originally! of the
opinion that it represented the Charles Island race, but he
later? referred it to Indefatigable Island.
Dr. George Baur,* in 1889, was convinced that Testudo
ephippium represented the Abingdon Island race. This was
chiefly because of some notes which Dr. Baur found in an
edition of Captain Basil Hall’s Extracts from a Journal.4
Captain Hall visited the Galapagos Islands in January, 1822.
Abingdon was the only island upon which he landed. Speak-
ing of the tortoises, Captain Hall says: “We took some on
board, which lived for many months, but none of them sur-
vived the cold weather off Cape Horn. I preserved one in
a cask of spirits, and it may now be seen in the Museum of
the College at Edinburgh; it is about the medium size.”’
As Dr. Gunther remarks,® “this discovery received further
confirmation when Dr. Traquair, on renewing his inquiries,
found in the records of the old College Museum an entry of
a ‘Large Turtle from South Sea—Captain Basil Hall.’ Un-
1Trans. Royal Soc. Lond. 1875, pp. 260, 271.
2Gigantic Land Tortoises Brit. Mus., 1877, p. 11.
3Am. Nat., xxt11, 1889, pp. 1041-1042.
4Hall, Extracts from a Journal written on the Coasts of Chili, Peru, and
Mexico, in the Years 1820, 1821, 1822. Part II. London, 1840. (Original Edi-
tion, Edinburgh, 1824.)
5Novitates Zool., 111, No. 4, 1896, p. 333.
September 30, 1914.
952 CALIFORNIA ACADEMY OF SCIENCES [Proc. 4tu Ser.
fortunately no mark or label is attached to the specimen by
which its identification could have been placed beyond ques-
tion, so that, as Dr. Traquair says at the end of a letter to Dr.
Baur, “we have no absolute certainty as to whether our Tes-
tudo ephippium is the specimen from the South Sea presented
by Captain Basil Hall or not.”
Recently,® Dr. Ginther has compared the type of his T.
ephippium directly with three specimens of the Abingdon tor-
toise and four specimens from Duncan Island. He finds that
the agreement of the Duncan Island specimens with the type
of T. ephippiwm is perfect, while marked differences exist be-
tween that specimen and those from Abingdon Island.
After careful study of his descriptions, measurements, and
plates, in connection with my large series of specimens from
Duncan Island, I see no reason to doubt the correctness of
Ginther’s conclusion that the name Testudo ephippium may
properly be applied to the Duncan Island tortoise.
7. Testudo mucrophyes Ginther. 1875
Testudo microphyes was first described by Giinther, in 1875,
from a small adult individual which he then thought was 2
male, but which he later concluded was a female. This speci-
men was without definite locality. Giinther at first? thought
it represented the Hood Island race, but later® identified it
with specimens from Tagus Cove, Albemarle Island. The
merging of the anterior two marginals of each side into a
single plate is probably, as Giinther remarked, only an indi-
vidual variation.
Some measurements of the type specimen in the British
Museum were made for me, as follows:
Straight length .0....0...cceeeeeeeeeeeseeeeeee- 21.3 inches 100%
Straight width ...... SES 35. a 74.4970
Length over curve .. 26.45 “ 124%
Width over curve .... =26.5 “124%
Width at 2-3d marginals AZ4 aS 58.2%
Middle height .............. Sa10:1 i AFA
Front height .............. ... 6.8 <4 32%
Height to marginals ae 4 4.2%
Wength: of ‘plastron:...2..5. ee 17.6 4 82.6%
®8Novitates Zool., 111, No. 4, 1896, pp. 329-334.
7Trans. Royal Soc. Lond., 1875, pp. 260, 275.
8Gigantic Land Tortoises Brit. Mus., 1877, p. 78.
Vor. II, Pr. I] VAN DENBURGH—GALAPAGOS TORTOISES 953
These measurements, as well as Giinther’s figures, show
clearly that the height to marginals is very low in the type
specimen. This being true, it must have come from one of
three localities, if it represents any of the known non-saddle-
backed races. These localities are Chatham, Tagus Cove, and
southern Albemarle. The general shape, the great breadth
over curve, and the development of the pectoral plates, indi-
cate that it did not originate in Chatham Island. It must,
therefore, have come from Albemarle Island. Since there
occur in southern Albemarle (Cape Rose) tortoises which |]
have been unable to distinguish from those of Tagus Cove,
any attempt to determine more definitely the place of origin
of Gunther’s type seems needless. If, then, we are right in
considering that the tortoises from Cape Rose are identical
with those of Tagus Cove, there are two Albemarle races hav-
ing the general characteristics of the type of Testudo micro-
phyes. These are the race found at Tagus Cove (and Cape
Rose) and the smooth flat-backed race of southeastern Albe-
marle, for which I employ the name Testudo giintheri Baur.
Lacking as I do any females from Tagus Cove, I am unable,
from Giinther’s figures and descriptions, or from the measure-
ments at hand, to indicate any very satisfactory points of dis-
tinction between the type of T. microphyes and those tor-
toises from southeastern Albemarle. My opinion, however,
is that Ginther’s type belongs with the Tagus Cove specimens,
and my “key”’ so refers it.
Until it can be shown that his type specimen differs from
the specimens taken at Tagus Cove, Ginther’s later associa-
tion of the name Testudo microphyes with this race should
be followed. I therefore employ the name Testudo micro-
phyes for the tortoises from Tagus Cove, Albemarle, and for
a few specimens taken near Cape Rose on the southern coast
of Albemarle Island.
8. Testudo vicina Giinther. 1875
This name was proposed by Giinther! for the carapace and
skeleton of a large male of unknown origin. Commander
Cookson having found at Iguana Cove, Albemarle, a tortoise
1Trans. Royal Soc. Lond. 1875, p. 277.
954 CALIFORNIA ACADEMY OF SCIENCES [Proc. 41TH Ser.
of different shape and general appearance from those captured
near Tagus Cove,? Ginther® thought it very probable that
Albemarle was inhabited by at least two distinct races. He
compared the skull of the type specimen of his Testudo vicina
with a skull* brought by Commander Cookson from Iguana
Cove, and, finding them identical, concluded that Testudo
vicina was the race native to southwestern Albemarle. Many
years later, Rothschild obtained specimens from Iguana Cove,
and confirmed this opinion, which since then has been ac-
cepted quite generally.
The discovery of several races which were not known to
Gunther, Baur, or Rothschild, makes it necessary to reopen
the question, and to consider whether Giinther’s specimen may
not belong to one of the latter rather than to the race with
which it has been associated. I find, however, that the only
tortoises, aside from South Albemarle specimens, bearing any
great resemblance to Giinther’s type are those from James and
Jervis islands; but since I have as yet been unable to find any
differences sufficient to enable me to distinguish the singie
Jervis specimen from the Iguana Cove tortoises, we need con-
sider, in the present connection, only those from James Island.
Giinther’s type specimen has the following dimensions,” in
inches and percentages of the straight length:
Straight Vemothy ssccscscstesccesesssesseseseessese es 32.9 inches 100%
Straight width ...... 25 - 76%
Length over curve . Al “125%
Width over curve ...... 40 #1229
Width at 2-3d marginals .. 1675 * 51%
Middle height .... 16 = 49%
Front height ...... 21425 41%
Height to marginals .................. RO he Ok 8%
Tenethe of plast rom. —.2.ce.cdeeececcceeceee terest 2535, 77%
These measurements, like Ginther’s plate, show that the
specimen has not the high convex back and other character-
istics of the James Island race, but that it agrees very closely
with specimens from Iguana Cove. I can see no good reason
for not regarding it as identical with specimens from the lat-
ter locality, and, therefore, shall follow all recent authors in
2Cookson, Proc. Zool. Soc. Lond. 1876, p. 524.
8Gigantic Land Tortoises Brit. Mus., 1877, p. 73.
4The single living specimen was lost before reaching England.
5These measurements have been in part taken for me with the kind permission
of Dr. Boulenger, and in part are derived from Gunther’s writings.
Vor. II, Pr. 1] VAN DENBURGH—GALAPAGOS TORTOISES 255
the use of the name Testudo vicina Giinther for the race found
at Iguana Cove and throughout southern Albemarle.
9. Testudo galapagoensis Baur. 1889
In 1833, Commander John Downes visited the Galapagos
Islands in the United States Frigate ‘““Potomac.”® Charles
was the only island on which he landed. The visit there ex-
tended from August 31 to September 10. “A large number
of the crew were daily on shore after terrapin, and frequently
exposed throughout the day to a hot sun, with these immense
animals on their backs, traveling over the broken lava.” The
“Potomac” returned to Boston, May 23, 1834. In the fol-
lowing month, Captain John Downes, of the “Potomac,” pre-
sented to the Boston Society of Natural History two living
gigantic Galapagos tortoises, weighing nearly three hundeed
pounds each. There would seem to be little room for doubt
that these specimens originated in Charles Island.
These tortoises, a male and a female, served as material
for a paper, by Dr. J. B. Jackson, entitled Anatomical De-
scription of the Galapagos Tortoise,® published in 1837. Jacix-
son regarded them as identical with Harlan’s Testudo ele-
phantopus, it being generally thought that all Galapagos tor-
toises were of one species.
Of these two specimens, it appears that only the male is
still in the collection of the Boston Society of Natural His-
tory. The measurements given by Jackson prove it to be the
specimen described by him. What became of the female is
not known.
In his article published in the American Naturalist for De-
cember, 1889, Dr. Baur, having compared the skull of the
specimen remaining in the collection of the Boston Society
with that of a tortoise belonging to the Philadelphia Academy
of Sciences, which he mistook for Harlan’s original specimen,?
stated that the two were specifically distinct. Without stat-
ing any of the points of difference, Dr. Baur named the
®Reynolds, Voyage of the United States Frigate Potomac, 1835, pp. 464-73, 547;
c. f. Baur, Am. Nat., xx111, 1889, p. 1039.
7Journal Boston Soc. Nat. Hist., 1, 1834-37, p, 521.
8Tom. cit., pp. 443-64, pls. x, x1.
9Regarding the identity of this specimen see remarks under Testudo elephantopus
Harlan, 1827, p. 245.
256 CALIFORNIA ACADEMY OF SCIENCES [Proc. 47H Ser.
Charles Island specimen Testudo galapagoensis. Were it not
for the fact that Baur specifically refers to this particular speci-
men in the Museum of the Boston Society of Natural History,
this name might be regarded as a nomen nudum. It remained
for Dr. Giinther, in 1902,!° to point out characters distin-
guishing Testudo galapagoensis from the other races known
to him.
To me, the evidence that the type of Testudo galapagoensis
came originally from Charles Island, although circumstantial,
is convincing. Also, I believe that it represents a race dis-
tinct from any known from another locality. While Baur was
right in his conclusion that it differed from the specimen
which he thought was Harlan’s type of 7. elephantopus, he
was wrong in so regarding the latter specimen, which, it
seems, is merely a young Testudo vicma and not Harlan’s
specimen at all. Therefore, it never has been shown that
Jackson’s specimens, one of which became the type of Baur’s
Testudo galapagocnsis, were not the same as Harlan’s T. ele-
phantopus. I have already’? given my reasons for thinking
that Harlan’s specimen represented the Charles Island race.
If I am right in this view, Harlan’s Testudo elephantopus
and Baur’s Testudo galapagoensis are synonyms. The former
is much the older term.
10. Testudo giintheri Baur. 1889
In his article on Gigantic Land Tortoises of the Galapagos
Islands,!* published in 1889, Dr. George Baur proposed the
name Testudo giintheri for the species described by Dr. Giin-
ther as Testudo elephantopus Harlan. The specimen figured
by Dr. Giinther may be regarded as the type. This specimen,
as I have stated in discussing T. elephantopus, is of indefinite
origin. The carapace is depressed, with somewhat elevated
front; width over curve greater than length over curve; height
to marginals low; and pectoral plates well-developed. In shape,
it resembles the Chatham Island tortoise, but differs in the
greater breadth over curve and in the development of the
pectoral plates. It, seemingly, is identical with the smooth,
10Novitates Zool., 1x, July, 1902, pp. 184-92, pls. xvI-xxI.
12p. 247 ante.
18Baur, Am. Naturalist, xx111, Dec. 1889, p. 1044.
Vor. II, Pr. I] VAN DENBURGH—GALAPAGOS TORTOISES 957
depressed race found in southeastern Albemarle, in which the
height to marginals is low. Testudo giintheri,'* therefore, is
available as a name for that tortoise.
11. Testudo wallacei Rothschild. 1902
Rothschild proposed this name for a carapace of unknown
origin. He says it belongs to the section including T. vicina.
It is not saddle-shaped, but in other respects seems nearer to
Testudo galapagoensis than to any other race. It differs
from T. galapagoensis in its greater depth, much narrower
anterior portion of carapace, convex marginal plates, and ina
being strongly declivous in front. The total length in a
straight line is 32.25 inches. From the fact that between the
years 1800 and 1835 most of the giant tortoises were got on
James and Chatham islands, and that Captain Porter says the
James Island ones were round, Rothschild was of the opinion
that this carapace represented the Chatham Island species.
It would be quite impossible, I think, from this brief de-
scription alone to form an opinion of any value as to the:
identity of Testudo wallacei. Fortunately, however, I now
have before me a photograph of Rothschild’s specimen. Since
Mr. Rothschild’s article appeared we have received tortoises
from both Chatham and James islands. T. wallacei is very
different from the Chatham Island race. The only tortoises
which Mr. Rothschild’s specimen at all resembles are those
of Charles, James, and Jervis islands, and one race of southern
Albemarle. Rothschild himself has given reasons for regard-
ing it as distinct from the specimens which are believed to
have come from Charles Island. We need consider, then,
only its relationship to the tortoises of James, Jervis and
southern Albemarle.
The James Island tortoise is one of the races which may
be considered as intermediate between the saddle-backed and
non-saddle-backed groups. It is narrow, with a long plastron,
and is high in front, with a still higher, somewhat dome-
shaped, back. The Jervis and Iguana Cove tortoises have more
horizontal backs sloping down anteriorly. The curved length
14Dr. Hans Gadow (Trans. Zool. Soc. Lond. 1894, p. 320) has proposed the
name Testudo giintheri for certain fragmentary specimens from Mauritius. This
term being preoccupied by Baur’s application of it to a Galapagos tortoise, Dr.
Gadow’s species may be called Testudo gadowt.
958 CALIFORNIA ACADEMY OF SCIENCES [Proc. 4TH Ser.
is less, the straight width is usually greater, the plastron
shorter.
In the Iguana Cove tortoises the curved width averages
greater than the curved length, while in the James and Jervis
tortoises the reverse is true.
There is current in the islands a rumor, which I have been
unable to substantiate, that the tortoises on Jervis Island were
introduced there by Dr. Baur. If this rumor is founded upon
fact, the tortoises must have originated in southern Albemarle,
and are, of course, identical with the T. vicina of that region.
Certainly the Academy’s specimen from Jervis has many points
of resemblance to those from Iguana Cove. The curved length
is greater, but I am unable to point out other definite points
of distinction; although one gets the impression that differ-
ences exist, and would probably become evident, had one a
series of specimens to compare. All this being true, it seems
best, pending further information, to regard the Jervis Island
tortoise as native to, and characteristic of, that island. I do
not, however, feel justified in giving it a new name.
Rothschild gives only the straight length of his type of T.
wallacei, and without other measurements it is hazardous to
attempt to say which form it represents. However, the photo-
graph before me shows a flat-backed shell which differs in
many respects from my James Island specimens, while it seems
to agree much more closely with the Jervis Island tortoise and
the T. vicina from southern Albemarle. Rothschild had speci-
mens of JT. vicina with which to compare his T. wallacei, and
evidently thought them distinct, although he says they belong
to the same section. This leaves only the Jervis tortoise. I
confess it is with a certain lack of confidence that I have con-
cluded to use the name 7. wallacei for this Jervis Island tor-
toise. Nevertheless it seems the best way out of two diffh-
culties.
Having thus considered these questions of nomenclature
we may now return to our list of races and apply to them the
following names :
Vout. II, Pr. I] VAN DENBURGH—GALAPAGOS TORTOISES 259
Lee Abingdon | scc-s et ee eee T. abingdoni Ginther.
2M ATILCS Re Nee enh Olen, Se T. darwini Van Denburgh.
Soe eGvis' 4... ..T. wallacei Rothschild.
ey Muncanies. ..T. ephippium Giinther.
Suindetativable! 2. i.c2i2 he T. porteri Rothschild.
Om Barrington! +s. 22 ee Tr. sp.
72 Chatham! ==. . chathamensis Van Denburgh.
8: Hoodies ..T. hoodensis Van Denburgh.
OMe C hale sig reece erence sth neat Stee . elephantopus Harlan.
11. Vilamil, Albemarle ....... . gintheri Baur.
12. Iguana Cove, Albemarle . ..I. vicina Gunther.
13. Tagus Cove, Albemarle... . microphyes Gunther.
14. Bank’s Bay, Albemarle ................ . becki Rothschild.
15. Cowley Mountain, Albemarle......7. sp.
Te
ae
ile,
il OMbaNiar borough. ssc tee T. phantastica Van Denburgh.
Te
ib,
Tt
Th
2. DESCRIPTION.
It next becomes necessary to investigate the differences
which distinguish these races of land tortoises one from an-
other, to endeavor to find the limits of their variation, and to
point out those characters which are available for their classi-
fication. This investigation we may divide into a consider-
ation of external characters and an examination for osteo-
logical differences. The external characters may be divided
into those of the shell, and those of the soft parts—the head,
neck, limbs, and tail.
THE SHELL—TIs covered with horny plates which do not
differ in number,? but which vary in outline according to the
shape of the bony shell. In young tortoises these plates bear
striations corresponding to the lines of growth. Older indi-
viduals become smoother, but in certain races this tendency
seems to be developed more strongly than in others. The
oldest individuals of almost all races lose these striations. In
certain races, the central portions of the vertebral and costal
plates are elevated much more than in others. There are also
marked differences in the lateral outline of the marginal plates.
The upper border of the eighth marginal plate in Testudo
abingdoni is much shorter than in any other race. In the
Duncan Island tortoises one finds an occasional specimen with
the pectoral plates reduced in size so that they do not meet on
the median line. This tendency becomes more constant in
T. chathamensis. It is unknown in any of the other races.
1Except as individual variations. See T. ephippium and T. microphyes.
260 CALIFORNIA ACADEMY OF SCIENCES [Proc. 4rw Ser.
In certain specimens from Vilamil (T. giintheri) one notes a
curiously pitted surface on some of the plates, as though they
were diseased. It is due to unequal shedding of the layers
of the horny plates. Why it should be confined to this region,
I cannot explain. Differences in color are very slight, but one
specimen shows on one plate a single diagonal clear yellow
ray, probably due to the absence of pigment cells at one point
of growth.
When one sees side by side tortoises from several islands, the
differences which are most evident are those in the shape of
the shell. But, while these differences are noticeable and real,
they are subject to so much variation that their formulation is
most difficult, not to say confusing. In order to avoid hopeless
indefiniteness it is necessary to devise some means of express-
ing and comparing upon paper these variations in shape. It
was found that this could best be done by taking numerous
measurements of each tortoise and reducing all these measure-
ments to percentages of the (straight) length of the tortoise
In this way, the measurements of tortoises of all sizes may be
directly compared. The tortoise is placed upon a level board
or table in such a position that as nearly as possible it rests
naturally upon the entire length of the plastral bridge of each
side. With the tortoise in this position, the straight leagth
is the distance between verticals erected at the nuchal notch
and at the posterior border of the supracaudal plate. The
straight width is the distance between verticals erected at the
sides of the tortoise opposite the line of meeting of the second
and third costal plates. The curved length is measured with
a tape-measure over the midvertebral line from the nuchal
notch to the posterior edge of the supracaudal plate. The
curved width is taken from the bend in the marginal plates
up along the line of meeting of the second and third costals,
across the middle of the third vertebral, down between the
second and third costals, to the line of bending of the margi-
nals. The width second-to-third-marginals is the straight
width at the level of the lateral margins of the sutures between
the second and third marginal plates of each side. The middle
height is the vertical distance between the board or table and
the middle of the third vertebral plate, and is taken with a
square and spirit-level. The front height is taken in the
Vor. II, Pr. I] VAN DENBURGH—GALAPAGOS TORTOISES 961
same manner at the nuchal notch. The height to marginais
is the vertical distance from the table to the lower border of
the marginal plates at about the middle of the plastral bridge.
The plastron is measured with a tape along the median line—
the tape is not pushed into plastral depressions, and when the
plastron is notched the projections are not measured.
The actual measurements of the tortoises in the collection
of the Academy will be given under each species. For pur-
poses of comparison I have made charts showing each dimen-
sion as found in all the races represented. The males and
females are charted on separate lines. Each medium-sized or
adult specimen is represented by a dot, while the young are
indicated by crosses. Certain combinations of these measure-
ments are also charted.
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{VAN DENBURGH] Plate 23
oc. CAL. ACAD. SCI. 4th Series Vol. II Pt. |
PR
Narborough Aacosamesenrer
Bank’s Bay..........-.+.
Abingdon..............00
Dinca :scceteesesteenversess
Hood....:ceneneeeeacness
Cha
Tagus Cove..........+. A
Cape ROSE.........c-0--n
Vilamil (flat).
Vilamil (%4 flat)...
CobOS, €tC..-cc----e----
Vilamil (dome)......
Cowley Mt
Indefatigable............
hel (TS at) ret IE ol sa 1 SORURSREGH AE RSREERLD aE
A A ie Pee a Oe Re ee aa 8s
Bae a Sa a | ee Ree
Chart Showing Division into Saddle-Backed and Non-Saddle-Backed Races According to Key Divisions “a” and “a®.”
VAN DENBURGH—GALAPAGOS TORTOISES
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Vor. II, Pr. 1) VAN DENBURGH—GALAPAGOS TORTOISES 289
Examination of these charts shows four kinds of variatioa
in shape:
Variation with age.
Variation with sex.
QS
Variation with distribution.
4. Individual variation.
1. Variation with age-—Young tortoises of all races are
similar in shape. The racial characteristics become evident
only after the tortoises have attained a considerable size. The
differences between the young and adult are more marked in
the male than in the female, and in the so-called saddle-backed
than in the non-saddle-backed races. In other words, the
young are all more or less dome-shaped, the elevation and
constriction of the anterior portion of the carapace in the
saddle-backed races being acquired later in life.
In the young, the front height averages less; while the
middle height, the height to marginals, the curved length, the
length of plastron, and the straight width average more than
in the adult. The plastron is flat, notched posteriorly, and
lacks the posterior knob-like thickenings which later develop
in the males.
2. Variation with sex.—In the purely dome-shaped races,
such as that of Indefatigable Island, there is but little difference
in shape between the sexes. In the intermediate races, such as
those of Tagus Cove, Iguana Cove, James and Chatham
Islands, the female retains the high-backed, low-fronted cara-
pace; while in the male the anterior portion becomes elevated,
and the back, in consequence, appears flattened. In the saddle-
backed races, the males have the anterior portion raised still
higher, so that it sometimes is higher than the middle of the
carapace, and the first costal plates with the corresponding mar-
ginals appear as though pressed inward toward the median line.
The females of these races show this elevation and constriction,
but in a lesser degree.
In adult males the plastron often is quite concave, is shorter
than in females, and is thickened at its posterior extremity into
broad knob-like masses. These tumefactions seem to be pecu-
liar to the males except in one race. In Testudo giintheri of
290 CALIFORNIA ACADEMY OF SCIENCES [Proc. 4TH Ser.
southeastern Albemarle many of the female tortoises have these
knobs as highly developed as in any male.?
The females are broader than the males. In them also the
height to marginals usually is greater. The males attain a much
larger size than the females.
3. Variation with distribution—We have already stated
that the tortoises from any island differ in shape from those
from any other. When we consider how close these islands
are one to another, it is not strange that these differences should
be slight; nor are they the less interesting and worthy of study
on this account. When we compare Testudo abingdoni with
the tortoise of Indefatigable, or that of Narborough with that
of Chatham, the differences are, indeed, great. Had we speci-
mens from these islands only, we should, without hesitation,
regard them as very distinct species. But when we have before
us a large number of tortoises from many islands, we find that
the matter of their separation becomes most difficult. When
we chart our measurements, we see at once that, while certain
forms are very dissimilar, others are much less so, and that
when the entire group of races is considered the change is so
gradual that no sharp lines of distinction can be drawn. It is
evident that there are two main groups: the saddle-backed and
non-saddle-backed races. But the differences between even
these are to a great extent bridged by such forms as the James
(T. darwint), the Tagus Cove (T. microphyes), and the Chat-
ham Island (T. chathamensis) tortoises. Nevertheless, the dif-
ferences are real, and appear in the table of averages. The
extremes of individual variation in races so closely related
must overlap and prevent clear diagnosis, unless this variation
can in some way be hidden. Now, extremes of variation in any
one tortoise rarely affect more than a few measurements. It
therefore is possible, by selecting the measurements which best
bring out the racial differences, and by combining them in
various ways, to bury, as it were, the extremes of individual
variation by a process of summation of characters. It is only
in this way that we can hope to make a key for the separation
of the various races. Even when thus constructed the key
must be inadequate for the separation of some specimens. All
1Since this seems to be true also in the type of Ginther’s 7. microphyes I was at
first inclined to associate the latter name with this race, but it seems better to follow
Ginther’s use of the term. See remarks p. 253 ante.
Vou. Il, Pr. I] VAN DENBURGH—GALAPAGOS TORTOISES 991
that can be said for it is that it seems the only solution of a
most difficult problem, and must be regarded as a necessary evil.
Although sharp lines cannot be drawn between the various
races, I shall use binomials in referring to them, since I believe
nothing is to be gained by a more cumbersome nomenclature
when dealing with such insular forms.
4. Indwidual Variation.—In the shape of the carapace this
variation is very considerable, as is shown by the charts of
measurements. There is also much variation in the size attained
by different specimens. Some very old individuals are much
smaller than younger ones of the same races. The horny plates
are remarkably constant in number and shape, but certain indi-
vidual variations occur. The type of 7. microphyes has the
anterior two marginals of each side merged into single plates.
One specimen of Testudo vicina (No. 8254) from Vilamil has
an intergular plate. Another (No. 8196) has a single light-
yellow ray on one second costal, and an extra plate in the front
part of the plastron. Van Lidth de Jeude has figured a speci-
men of 7. ephippium in which the pectorals do not reach the
midline. This variation seems not very rare in this race. [I
have noted it in Nos. 8321 and 8333; and Nos. 8332 and 8367
have the left pectorals not extending to the midline, although
those of the right side reach it. In this Duncan Island race
also No. 8375 has five left costals, No. 8326 has five right cos-
tals, and No. 8361 has five right costals, and also has the third
vertebral divided into three irregular portions. In No. 8265
(Testudo giinther1) the pectorals are divided longitudinally.
THE Sort Parts.—These also vary with age, with sex, indi-
vidually, and with race. The young have proportionally shorter
necks, limbs, and tails than the adults; and the adult females
have these parts proportionally shorter than the adult males.
In the saddle-backed races these parts are longer than in the
dome-shaped races. Both sexes of the saddle-backed races
usually have more or less yellow on the lower jaw and throat.
This coloration appears also in some of the males of T. giin-
theri, and is found also in the James Island race. The non-
saddle-backed forms, the Tagus Cove race, and at least the
females of the Chatham race are entirely blackish brown.
292 CALIFORNIA ACADEMY OF SCIENCES [Proc. 47H Ser.
OsTEOLOGICAL DIFFERENCES.—Those which have been con-
sidered of taxonomic value are mainly differences which
appear in the skulls, cervical vertebrae, shoulder-girdle, pelvis,
and large limb bones. As in the case of the shell, these are
differences of proportion. It has been stated that Testudo
becki and the Charles Island tortoise (7. elephantopus s. gala-
fagoensis) differ from the other races in having the third
instead of the fourth cervical vertebra biconvex. This con-
dition in the type of 7. becki is an individual variation, since
it is the fourth vertebra which is biconvex in my series of
seven specimens from Bank’s Bay. The condition doubtless
is anomalous also in the Charles Island specimen. The dif-
ferences in proportion of the bones of the limbs and neck cor-
respond with the relative length of these parts in the various
races, the number of bones being the same in all. They are
proportionally shorter in the dome-shaped races, and longer
in those in which the carapace is elevated and compressed
anteriorly. These differences are shown in the measurements
of the limbs and neck given with the description of each race
or species. Certain differences in the skulls of the tortoises of
the various races have been pointed out by Dr. Giinther. I
believe that the differences he has indicated are all merely
individual variations. In a series of 24 skulls from Vilamil,
Albemarle, I find all of the variations which Dr. Giinther
mentions; and upon careful comparison of this series with one
skull from Hood Island (No. 8125), one from Indefatigable
(No. 8381), one from James (No. 8105), three from Dun-
can (Nos. 8378, 8379, and 8380), four from Chatham (Nos.
8127, 8128, 8130, and 8131), and one from Iguana Cove
(No. 8179), I can find no constant differences in the skulls
of the various races. In the skulls from Vilamil, the frontal
region may be flat or somewhat convex. The occipital spine
may be short or long, not reaching the posterior borders of
the mastoid processes or projecting far behind them, and
may or may not rise much above the level of the skull. There
is.much variation in the shape of the tympanic case and cavity.
The fossa in front of the occipital condyle may be deep or
very shallow. The tuberosity for the temporal muscle may
be quite small or very largely developed. The nasal opening
may be as high as broad, or broader than high. The palatal
Vor. II, Pr. 1] VAN DENBURGH—GALAPAGOS TORTOISES 293
region varies much in shape. It may be narrow or broad, and
the pterygoid edges may be sharp or blunt. The alveolar
ridges also vary in position and degree of development. We
may safely say that no constant differences exist among the
skulls of the various races of Galapagoan tortoises.
KEY TO GALAPAGOAN RACES
a.—Saddle-backed races—The sum of the percentage straight width,
curved width, width between second and third marginals, and the
difference between front and middle heights is less than, or exceeds
by not more than 10, the sum of the percentage straight length, front
height, twice the height to marginals, and length of plastron; or
else straight width less than 66%.
b.—Plastron more than 72% ; percentage of plastron exceeds that of
straight width by not less than 3; distance between prominent
points of first marginals less than 30%; front height usually less
than 53%.
c—Plastron more than 88%. Height to marginals 10 to 12%.
Hood Island.
T. hoodensis.—p. 313.
c’.—Plastron not more than 88%
d—Width at 2nd to 3rd marginals less than 39%; eighth
marginal much reduced and wedgeshaped at top; height
to marginals 8 to 10%. Abingdon Island.
T. abingdoni.—p. 296,
d’?—Width at 2nd to 3rd marginals not less than 39%;
eighth marginal with a considerable superior margin.
e—Width at 2nd to 3rd marginals plus middle height
minus front height equals less than 59%;
{—Height to marginals greater, 7 to 12%; size small;
plastron often shorter. Duncan Island.
T. ephippium.—p. 306.
f.—Height to marginals less, 5 to 9%; size large;
plastron often longer. Northern Albemarle.
T. becki.—p. 303.
e?—Width at 2nd to 3rd marginals plus middle height
minus front height equals not less than 60% (one
small @ ). James Island.
T. darwini.—p. 319.
b?.—Plastron less than 72% ; percentage of plastron not exceeding that
of straight width; distance between prominent points of first
marginals more than 30%; front height more than 53%; curved
length more than 123%.
Height to marginals less than 7%. Narborough Island.
T. phantastica.—p. 299.
a?.—Non-saddle-backed races. The sum of the percentage straight width,
curved width, width between second and third marginals and the
difference between front and middle heights exceeds by more than ten
the sum of the percentage straight length, front height, twice the
height to marginals, and plastron.
bb.—The sum of the curved length, front height, middle height, and
plastron, equals or exceeds the sum of the straight length, straight
width and curved width; the front height is more than 41% of
the straight length.
294 CALIFORNIA ACADEMY OF SCIENCES [Proc. 41TH Ser.
Straight width nor less than 72%; percentage of middle heigit
exceeds percentage of front height by not less than six; curved
length of male more than 122%; middle height in male not less
than 54%; front height in male not exceeding 45%. James
Island.
T. darwini—p. 319.
b?.—The sum of the curved length, front height, middle height, and
plastron, is less than the sum of the straight length, straight
width, and curved width; or? the front height does not exceed
41% of the straight length.
cc—The sum of the straight width, curved width and half the
height to marginals is less than twice the straight length; the
height to marginals is not more than 7%; the curved length
does not exceed 126%; the middle height does not exceed
51%; the percentage of the curved width does not exceed
the percentage of the curved length by more than 4.
dd—Pectoral plates much reduced medially, (usually) not
reaching the midline; plastron longer, its percentage ex-
ceeding that of straight width by more than 4. Chatham
Island.
T. microphyes.—p. 329.
dd?.—Pectoral plates not more reduced than in most races,
meeting on the midline; plastron shorter, its percentage
rarely exceeding that of straight width by more than 4.
Tagus Cove, Albemarle.
T. chathamensis.—p. 323.
c?—The sum of the straight width, curved width and half the
height to marginals is not less than twice the straight length ;?
or (if not) the height to marginals is more than 7%; or the
curved length exceeds 126%; or the middle height exceeds
51%; or the percentage of the curved width exceeds the
percentage of the curved length by more than four;
ddd—The sum of the straight width, middle height, differ-
ence between front and middle heights, and width at 2nd
to 3rd marginals exceeds 218%; or the difference between
percentages of front and middle heights not less than 26;
or height to marginals more than 10%; or plastron more
than 87%.
ee—Curved length plus width at 2nd to 3rd marginals
minus difference between curved length and curved
width minus middle height equals not less than 112%.
Indefatigable Island.
T. porteri—p. 354.
e?—Curved length plus width at 2nd to 3rd marginals
minus difference between curved length and curved
width minus middle height equals not more than
111%. Cowley Mountain, Albemarle.
T. sp.—p. 362.
ddd?.—The sum of the straight width, middle height, differ-
ence between front and middle heights and width at 2nd
to 3rd marginals not exceeding 218%; difference between
percentages of front and middle heights less than 26;
height to marginals not more than 10%; plastron not
more than 87%.
1In 2 Indefatigable and 4 dome-shaped 9? from South Albemarle.
2Three exceptions to this are 1 Iguana Cove, 1 Cobos, and 1 Vilamil specimen.
Vou. II, Pr. I] VAN DENBURGH—GALAPAGOS TORTOISES 995
eee.—Marginal border not scalloped; first marginals with-
out prominent points; height to marginals low, 3 to
8%; the sum of the curved length, middle height,
difference between front and middle heights, and
height to marginals is less than twice the straight
length. Southeastern Albermarle.
T. giintheri.—p. 335.
eee?—Marginal border scalloped; first marginals with
more or less prominent points; height to marginals
greater, 6 to 10%; the sum of the curved length, mid-
dle height, difference between front and middle
heights, and height to marginals usually is more
than twice the straight length.
ff—Width over curve greater, usually greater than
length over curve. South Albemarle.
T. vicina.—p. 344.
ff*—Width over curve less, not equal to length over
curve. Jervis Island.
T. wallacei.—p. 351.
DESCRIPTIONS OF THE RACES
In the following pages each race or species of Galapagoan
tortoise is treated separately. Since these tortoises are structur-
ally so nearly identical, and differ chiefly in shape and pro-
portions, it has been thought best to omit long descriptions of
each race. Instead, brief diagnoses are given, and it is hoped
that the numerous photographs of specimens, together with
the tables of measurements, will convey a more accurate and
comprehensive knowledge of these tortoises than any descrip-
tions could.
The field notes were made by Mr. Slevin.
296 CALIFORNIA ACADEMY OF SCIENCES [Proc. 4TH Ser.
Testudo abingdoni Gunther
Abingdon Island Tortoise
Plates 24 to 29.
Testudo abingdonii GuntueER, P. Z. S., 1877, p. 66; GUNTHER, Gigantic
Land Tortoises Brit. Mus., 1877, p. 85, pls. XI, XII, XIV figs. D-F,
XLVIII-L; Bourencer, Cat. Chelonians Brit. Mus., 1889, p. 171; Baur,
Am. Nat., XXIII, 1889 [1890] p. 1041, 1044 (part); Gapnow, Cambridge
Nat. Hist., VIII, 1901, p. 378; Hetier, Proc. Washington Acad. Sci., V.
1903, p. 59; Beck, Seventh Report N. Y. Zool. Soc., 1903, p. 17; S1eBen-
rock, Zool. Jahrb., Suppl. X, 3, 1909, p. 535.
Type specimens.—British Museum. Three adult males.
Straight length 38, 34, and 38% inches. Taken on Abing-
don Island, by Commander Cookson, in 1875.
Distribution—This species seems to be confined to the
moist district near the southern end of Abingdon Island.
Material—The Academy has complete skins of three adult
males and a nearly complete bony shell of a fourth. There
is a skeleton in the U. S. National Museum. The British
Museum contains the types, and the Tring Museum has one
adult male and one young example. So far as I can learn,
no female has ever been collected.
Diagnosis—No nuchal; gulars paired; fourth cervical ver-
tebra biconvex; front of carapace high, higher than, or but
little lower than, middle; height at nuchal notch more than
45% (46 to 50%) of straight length; difference between per-
centage of heights at third vertebral and at nuchal notch
less than 9 (2 to 5); carapace saddle-shaped, very narrow
anteriorly, width at margin of junction of second and third
marginals not more than 38% (36 to 38%); first marginals
not greatly enlarged, not much everted, their ventral surfaces
not vertical, their most prominent points separated by less
than 30% (20 to 26%); length over curve not more than
123% (115 to 119%); greater than width over curve; verti-
cal distance from lower surface of plastron to lower edge of
lateral marginals great, 8 to 10%; general size large, straight
length 29.3 to 36 inches; plastron long, median length 81 to
82% ; plates generally smooth; pectorals forming a suture on
median line; eighth marginal plate wedge-shaped with very
short superior border; lower jaw and throat of male marked
with yellow.
297
VAN DENBURGH—GALAPAGOS TORTOISES
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298 CALIFORNIA ACADEMY OF SCIENCES [Proc. 41m Ser.
General remarks.—This is one of the most “‘saddle-backed”’
of the Galapagoan tortoises. It is most like T. beckt of north-
ern Albemarle and T. ephippium of Duncan. The former,
however, is a larger species, while the Duncan race rarely if
ever grows as large as the Abingdon one. The shells of the
Abingdon tortoises are quite thin, and there is much yellow
about the head in males.
Field Notes*—
September 18, 1906.—Sailed this morning for Abingdon,
where we anchored at 12:30 on the south side of the island,
which appears to be the highest.
September 19, 1906.—Went up the mountain after tortoises.
We commenced to get into good tortoise country at about
seven or eight hundred feet elevation, the beginning of the
green zone. There is not much earth, the ground being
nearly all lava, but there is plenty of water and cactus. The
top of the mountain is covered with fog most of the time,
and everything is very wet. We saw fresh signs of tortoises
soon after getting into the green zone, and soon found a trail.
This we followed, and came upon a tortoise on the top of a
large rock which contained a few small water holes. It is
capital country for tortoises; we did not, however, look far-
ther, but skinned and carried out our first find. Ochsner went
up the mountain a little higher, and came upon another large
male. There are trails all around the mountain side. Beck
found a male on the southern slope of the mountain, lower
down. He also found the fresh trail of another tortoise, but
failed to find the tortoise. We expect to go in tomorrow and
get the tortoise Oschner found. The one we got out today
was a very fat male. Its stomach contained cactus.
September 20, 1906.—Spent the day getting out the tor-
toise found by Ochsner. Saw several trails but no new tor-
toises. Today Beck found the one the trail of which he saw
yesterday, but it is too far in to get out. Expect tomorrow
to get out the one he found yesterday. The stomach of the
one skinned today contained cactus and grass.
September 21, 1906.—Went in after the tortoise which
Beck found September 19. It was about a mile or two above
the green zone on the southern slope of the mountain. Up
there it is continually raining or foggy throughout the morn-
*All the field notes, unless otherwise stated, are by Mr. Joseph R. Slevin.
Vor. H, Pr. 1] VAN DENBURGH—GALAPAGOS TORTOISES 999
ing, but clears off in the afternoon. It is capital tortoise
country, everything being green, with plenty of water and
cactus. The three tortoises taken were very fat, and showed
the effects of good living. We saw no other signs, and they
probably are very rare on Abingdon Island. The stomach of
the one collected today contained grass and cactus. Beck
also found an old shell and a few bones in a cave, where the
tortoise probably had fallen in and died. We carried these
down, and they are in fairly good condition.
Testudo phantastica Van Denburgh
Narborough Island Tortoise
Plates 30 and 31.
Testudo phantasticus VAN DenpurcH, Proc. Cal. Acad. Sci. (4), 5
1907, p. 4; SIEBENROCK, Zool. Jahrb., Suppl., X. 3, 1909, p. 535.
Type specimen.—California Academy of Sciences No. 8101.
Adult male. Straight length 34.5 inches. Taken on Nar-
borough Island, by R. H. Beck, April 5, 1906.
Distribution.—This tortoise is from Narborough Island.
Material.—The type specimen is the only one that ever has
been seen.
Diagnosis.—No nuchal; gulars paired; fourth cervical ver-
tebra biconvex; front of carapace high, not lower than mid-
dle; height at nuchal notch more than 41% (54%) of straight
length; difference between percentages of height at third ver-
tebral and at nuchal notch less than 9 (2); carapace saddle-
shaped, narrow anteriorly, width at margin of junction of
second and third marginals not more than 54% (46%); first
marginals much enlarged, everted more than in any other
race, their ventral surfaces nearly vertical, their edges from
nuchal notch to prominent point nearly horizontal, prominent
point almost a right angle; distance between prominent points
of first marginals more than 30% (32%) ; length over curve
more than 123% (124%), greater than width over curve;
vertical distance from lower surface of plastron to lower edge
of lateral marginals small, 6% ; general size moderate, straight
length 34.5 inches; plastron short, 70% ; pectoral plates form-
ing a suture on median line; eighth marginal not reduced;
lower jaw and throat marked with yellow.
300
CALIFORNIA ACADEMY OF SCIENCES
TABLE OF MEASUREMENTS OF NARBOROUGH ISLAND TORTOISES.
Height
4uaQ 19g
worse
4uag 19g
s[RUlsiRUL
0} FYSI0H
quep 10g
quolg
quag 19g
STPPIW
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S[BUISINU Pg
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~
24.
18.75
52
46 | 18.
16.
116
124 | 41.
24, 70 | 42.
34.5
8101
[Proc. 4rH Ser.
Vor. II, Pr. I] VAN DENBURGH—GALAPAGOS TORTOISES 301
General remarks.—This is a “saddle-backed’’ tortoise with
the anterior marginal plates very strongly reverted. It seems
most nearly related to Testudo becki of northern Albemarle,
but no such enlargement and outward and backward devel-
opment of the anterior marginals is seen in any other tor-
toise. The early voyagers did not report the presence of
tortoises on Narborough Island, so the discovery of this spe-
cies was rather unexpected.
Field Notes.—Leaving Tagus Cove, April 2, 1906, Mr. Beck
and Mr. Hunter set out for Narborough to hunt for tortoises.
The climbing of the volcano proved most arduous, but Mr.
Beck, leaving Mr. Hunter at the lower level, pushed on to the
rim of the crater. The story of the finding of the only tortoise
known to have been taken upon this island is told by Mr.
Beck as follows:
Starting at daylight on April 3, 1906, a point about one-
half the distance to the top of Narborough Island was
reached at noon. Here commenced a narrow “island” of
lava of more ancient eruption than that over which the first
stage of the journey was made. This “island” had scattering
cactus and a few bushes and vines. As I worked up through
this strip of lava I saw a few old droppings of a tortoise, and
on examination I found he had been eating a considerable
quantity of Cereus, a cactus that is not often attacked by other
tortoises, as the spines are much more difficult to make way
with. Many spines were found in some of the excrement.
Thinking that if a tortoise were down in this desolate patch,
there would be many on top, I climbed toward the top, stopping
on the way at one small mount of much older larva, seemingly
of about the same age as Tagus Cove Mountain, for there
was considerable soil. There were no signs of tortoises here,
though iguanas were plentiful. Reaching the base of the
main crater at about 5 o’clock, I camped, and next morning,
climbed up to the top, which was, where I climbed, a plateau
a half mile across to the edge of the crater. The crater was
probably over 1000 feet deep and a half mile in diameter.
The plateau was covered with rank grass with clumps of
Opuntia near the outer edge and scattering Cereus—an excel-
lent place for tortoises; but none was seen, nor any signs.
302 CALIFORNIA ACADEMY OF SCIENCES [Proc. 4TH Ser.
Returned to camp, and struck down to the place where the tor-
toise signs were. Reached it at 4:30 P. M., and laying down
the pack commenced searching, and in a portion of the
“Gsland” of old lava found a still older flow where there was
considerable soil. Here I found a tortoise trail which had
been travelled the day before. I followed this, and soon found
in the trail a rock which had been used for the same purpose
that rocks in similar places on Tagus Cove Mountain have
served ever since the whalers carried off all the female tor-
toises. Going on some distance farther the old male was
found slowly feeding on grass near the trail. Getting my pack,
I ate supper and skinned the tortoise by moonlight. Starting
with him next morning, I reached the shore at 4:30 P. M.
Vor. II, Pr. 1] VAN DENBURGH—GALAPAGOS TORTOISES 303
Testudo becki Rothschild
North Albemarle Island Tortoise
Plates 31 to 38.
Testudo becki Rotuscuitp, Nov. Zool., VIII, 1901, p. 372; VAN
DenzurcH, Proc. Cal. Acad. Sci. (4), I, 1907, p. 4; SresENRocK, Zool.
Jahrb., Suppl. X, 3, 1909, p. 536.
Testudo bedsi, H¥ttrr, Proc. Washington Acad. Sci., V, 1903, p.
59 (err. typ.).
Type specimen.—Tring Museum, England. Adult male.
Length 40.75 inches. Taken at Cape Berkeley, northern Al-
bemarle, by R. H. Beck.
Distribution—This tortoise seems to be confined to the
northern end of Albemarle Island, where it has been taken
near Bank’s Bay and Cape Berkeley.
Material—The Academy collection contains seven speci-
mens, of which one is an adult female. The Tring Museum
contains five adult males collected by Mr. Beck.
Diagnosis.—No nuchal; gulars paired; fourth cervical ver-
tebra biconvex; front of carapace high, in males sometimes
higher than middle; height at nuchal notch not less than 44%
(44 to 52%) of straight length; difference between percent-
ages of front and middle heights less than 9 (—6 to +6);
carapace saddle-shaped, narrow anteriorly, width at margin
of junction of second and third marginals not more than 54%
(40 to 54%) ; first marginals not very greatly enlarged, not
greatly everted, their ventral surfaces not vertical, their most
prominent points separated by less than 30% (23 to 29%);
length over curve not more than 123% (114 to 121%),
greater than width over curve (except in one specimen) ;
vertical distance from lower surface of plastron to lower edge
of lateral marginals small—5 to 8% in males, 9% in female;
general size large, straight length 34 to 41.5 inches; plastron
of moderate length, 73 to 84%; plates nearly smooth in
adults; pectorals forming a suture on median line; eighth
marginal plate not reduced; lower jaw and throat of males
marked with yellow.
September 30, 1914.
[Proc. 4ta Ser.
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CALIFORNIA ACADEMY OF SCIENCES
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VoL. I, Pr. I] VAN DENBURGH—GALAPAGOS TORTOISES 305
General remarks.—Testudo becki is a very large “saddle-
backed” tortoise with a thick, heavy shell. The female speci-
men, however, although evidently an old individual, is smail
and might easily be mistaken for some of the Duncan Island
females. One of the large males is less compressed in front,
and somewhat resembles the James Island males.
Field Notes—April 9 to 16, 1906.—Prepared to go to Bank’s
Bay, and sailed in the boat with the mate. We had light breezes
and were out all night . The skiff picked us up in the morning,
and we towed up to the camping beach. The mountain ap-
pears very much like the one at Tagus Cove, but has two
recent lava-flows running down the side. The vegetation is
very dense and green. The flat, however, at this time was
getting dry, and the tortoises had evidently gone up higher,
as we got only seven. Their trails were numerous and dis-
tinct. They fed chiefly on a coarse grass that is abundant at
the foot of the mountain. No cactus was found in any of the
stomachs examined, and not much water was found in the sae
around the heart. This fluid is somewhat oily, and not thin
like water. The country at the foot of the mountain is brushy,
with some large trees, quite a bit of reddish soil, and some
lava-flows fairly well covered. Beck and I went up the coast
about three miles to an isolated patch of brush and trees to
see if there were any signs of tortoises, but saw none. I should.
suppose the only chance of their being there would be if they
had happened to be along the coast during the wet season, and
were then shut off by the recent lava-flows, for the distance to
travel from the mountain would be too great. We made a
stay of seven days at Banks Bay and collected seven tortoises.
All these tortoises had comparatively longer necks than any
others measured thus far. We left on the afternoon of the
sixteenth and got back to the ship about midnight.
306 CALIFORNIA ACADEMY OF SCIENCES [Proc. 41TH Serr.
Testudo ephippium Gunther
Duncan Island Tortoise
Plates 39 to 52.
Testudo ephippium Gintuer, Trans. Royal Soc. Lond., CLXV, 1875, p.
271, pls. 34, 35 fig. B, 37 fig. C, 38 fig. C, 39 fig. C, 42 fig. B, 44 fig. B, 45 fig.
B; Gunruer, Gigantic Land Tortoises Brit. Mus., 1877, p. 81, pls. XX XI B,
fig. B, XXXIX, XLIV, XLII fig. C, XLIII fig. C, XLIV fig. C; Bouten-
GER, Cat. Chelonians Brit. Mus., 1889, p. 171; Baur, Am. Nat. XXIII, 1889
(1890) p. 1040; Ginruer, Novit. Zool., III, 1896, p. 329, pls. XX-XXII;
LiptH bE JrupE, Notes Leyden Mus., XX, 1898, p. 126; pls. III-V;
Gapow, Cambridge Nat. Hist., VIII, 1901, p. 378; HEttrr, Proc. Washing-
ton Acad. Sci., V, 1903, p. 57; Beck, Seventh Report N. Y. Zool. Soc., 1903,
p. 15; SrksENRocK, Zool. Jahrb., Suppl. X, 3, 1909, p. 534.
‘Gee abingdonti (part), Baur, Am. Nat., XXIII, 1889 (1890), p.
Type specimen.—Museum of Science and Arts, Edinburgh.
Adult male. Straight length 33 inches. Origin unknown.
Distribution.—This tortoise has been found only on Dun-
can Island.
Material—There are in the Academy’s collection eighty-
six specimens of this tortoise. Twenty-five of these are males.
This race and those found in southeastern Albemarle are the
ones most abundantly represented in museums.
Diagnosis——No nuchal; gulars paired; fourth cervical ver-
tebra biconvex; front of carapace high, higher than or but
little lower than middle; height at nuchal notch more than
38% (39 to 54%) of straight length; difference between pez-
centages of heights at third vertebral and at nuchal notch less
than 12 (—11 to +11); carapace saddle-shaped, usually nar-
row anteriorly, width at margin of junction of second and
third marginals not more than 39 to 59%; first marginals
sometimes much everted, their most prominent points sep-
rated by less than 30% (17 to 29%); length over curve not
more than 123% (109 to 122%); usually greater than width
over curve; vertical distance from lower surface of plastron
to lower edge of lateral marginals great—7 to 12%; general
size rather small, straight length 18.4 to 29.5 inches; plastron
of moderate length, 75 to 88%; plates generally smooth in
adults; pectorals usually forming a suture on median linz;
eighth marginal plate not reduced, with a considerable supe-
rior border; lower jaw and throat in males marked with
yellow.
30
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310 CALIFORNIA ACADEMY OF SCIENCES [Proc. 41H SER.
General remarks—The Duncan Island tortoise is one of
the smaller species. The size is by no means proportionate
to the age, if one may judge from the ossification of the
points of growth in the bones and the loss of striation of the
plates of the carapace. Some of the large males seem to be
quite young, and some of the oldest females are very small.
The large males are most similar in shape to those of Abing-
don. There is much variation in shape in both sexes, as is
shown in the tables and charts of measurements and the pho-
tographs of specimens. A number of specimens have the
pectoral plates not meeting on the midline.
An egg (No. 8423) from Duncan Island measures 2.34x
2.30 inches. It was found lying on the surface of the ground
in December, 1905.
Field Notes—Dec. 1, 1905.—Sailed for Duncan Island in the
morning, and anchored off the northeast side of the island at
dusk. Light winds all day.
Dec. 2, 1905.—Skinned two turtles and a tortoise which
Hunter brought down from the edge of the crater. Beck
went ashore looking for tortoises, and found twelve, which
he tied up. Monday we start to skin them and get them to
the vessel. I shall clear things up somewhat before going on
Tuesday to camp with Beck. Beck found the skull of a tor-
toise in good condition, and brought it down.
Dec. 4, 1905.—Beck went into camp today on the top of
the crater. I go up tomorrow to skin tortoises. Stewart,
Hunter, and Ochsner brought down a tortoise each today ; two
males and a female.
Dec. 5, 1905.—Finished the skinning of the three tortoises
brought down yesterday. All were very fat, and had very
long necks for their size. The female had eggs in yolk and
one nearly developed.
Dec. 6-9, 1905.—I was in camp skinning and carrying tor-
toises. We had our camp in a valley near the top of the
island just south of the large crater. The country is very
rough, and covered in most places with thick brush and thorn
bushes. No tortoises were found in the crater, but Beck saw
the tracks of one there. We found several old males, which
were brought down alive, and which will be kept if possible.
Vor. I, Pr. 1] VAN DENBURGH—GALAPAGOS TORTOISES 211
The tortoises have lots of moss in their stomachs and a kind
of thick grass that, when dried, looks somewhat like straw.
They also feed largely on cactus. I was able to get the tem-
perature of some, and found them to be warm, but they hap-
pened to be in the sun. Some measurements were lost be-
cause my note book got wet. It is not the best kind of country
for books or tools of any description. We have got about
twenty-nine tortoises on board up to date and have several
more tied up ashore which we expect to get next week. The
tortoises here all have very dark livers, while on Indefatigable
all were very light-colored and fat. The Duncan tortoises
are all very fat except the old males, which had no fat or very
little. I am going back the first thing Monday morning to
work on tortoises again.
Dec. 11-16, 1905.—Camped in the central part of Duncan,
working on tortoises. We have been here two weeks now,
and probably have about eighty tortoises. They were com-
mon along the southern and western slopes of the island, where
most of them were taken. All the females had eggs in yolk
form, and one with hard shell was found. Mr. Beck found
two eggs exposed on the ground. We kept them to blow,
though both were cracked. We had a light rain all night on
the twelfth, and the tortoises came out from the brush to the
water holes. Those we found after this were mostly filled
with water, which seemed to be all through the body, and
would come out as soon as the plastron was cut into. The
stomachs contained cactus, grass and moss. Some of the
old males taken would stretch out their necks and, with mouths
wide open, would have a somewhat fierce expression, but they
made no attempt to bite. Several pictures were taken—one of
an old male which was holding a small female by the hind
leg. The old tortoises had lichen growing on their backs and
at a short distance looked exactly like blocks of lava, which
were covered with the same growth. I shall have to spend
a few days now getting the tortoises put in shape. With such
a grand rush they could not well be in the best condition. We
have to go to Conway Bay tomorrow, and from there to
Jervis and James.
Jan. 30, 1906.—The Duncan tortoises are doing well, and
eat a good portion of cactus. They are very slow and delib-
312 CALIFORNIA ACADEMY OF SCIENCES [Proc. 41TH Ser.
erate in their movements. They take very small bites, scrap-
ing the inside of the cactus with their horny jaws.
July 11, 1906.—One of the old Duncan tortoises died to-
day. He was full of sores (abscesses?) and had something
the matter with his feet, as the skin nearly fell off them. The
lungs were very dry and full of hard lumps. The skull was
broken and several other bones were cracked or very weak.
Altogether, he was in a bad state, whatever was the matter.
August 14, 1906.—Anchored off Duncan about ten in the
morning. I went ashore for lizards, while Beck went in after
tortoises.
August 15, 1906.—I went down into the large crater at the
north end of the island. The floor of the crater is 450 feet
above the sea level, and is composed of red loam covered with
large thorn bushes and old stumps. The vegetation is thickest
around the edge, while the central portion is almost bare. I
saw old signs of tortoises, but lizards were the only reptiles
seen in the crater. Beck got seven tortoises down to the
vessel, some alive and some partly skinned. We shall have to
clean up the mess tomorrow. ‘Tortoises still are abundant on
Duncan. We run across them while hunting for other things.
Former collectors could not have covered very much country,
if they could say they doubted whether more than two or three
yet remained on the island. Beck found that one female con-
tained large eggs with soft white shell nearly ready to lay.
He brought these down, and I will see if it is possible to pre-
serve them. We expect to sail for Vilamil early in the morn-
ing.
Sept. 8, 1906.—The large male tortoise we took off Duncan
during our first visit died today.
Oct. 4, 1906.—A male Duncan tortoise died on board today.
Vor. II, Pr. I] VAN DENBURGH—GALAPAGOS TORTOISES 313
Testudo hoodensis Van Denburgh
Hood Island Tortoise
Plates 52 to 55.
Testudo hoodensis VAN DeENnBURGH, Proc. Cal. Acad. Sci. (4), I,
1907, p. 3; SrEBENROcK, Zool. Jahrb., Suppl. X, 3 1909, p. 535.
Type specimen.—California Academy of Sciences No. 8121.
Male. Straight length 22.2 inches. Taken on Hood Island,
by Joseph R. Slevin and E. S. King, June 27, 1906.
Distribution.—This tortoise is known only from Hood
Island.
Material—The Academy has the skins and bones of one
male and two female specimens, one extra skull and some
fragments. The Honorable Walter Rothschild writes me that
there is in his museum at Tring a carapace without plastron
which he refers to this species.
Diagnosis —No nuchal; gulars paired; fourth cervical ver-
tebra biconvex; front of carapace high, little lower than mid-
dle, height at nuchal notch 42 to 49% of straight length; dif-
ference between percentages of heights at third vertebral and
at nuchal notch less than 9 (2 to 6); carapace saddle-shaped,
narrow anteriorly, width at margin of junction of second and
third marginals not more than 54% (45%) ; first marginals
not greatly enlarged, not much everted, their ventral surfaces
not vertical, their most prominent points separated by less than
30% (20%) ; length over curve not more than 123% (111 to
123%) ; greater than width over curve; vertical distance from
lower surface of plastron to lower edge of lateral marginals
great, 10 to 12%; general size rather small, straight length,
22.2 inches; plastron long, median length 89 to 93%; plates
striated, central portions of vertebrals and costals much ele-
vated ; pectoral plates forming a suture on median line; lower
jaw and throat marked with yellow.
9
14
CALIFORNIA ACADEMY OF SCIENCES
ISLAND TORTOISES.
TABLE OF MEASUREMENTS OF HOOD
‘Height
que9 wag
Tey
quag 12d |
YON
quag aq |
MOQIA 0} BILIXV
quad ted | 15
qury pur
“quag Jaq |
quiry e104
quay 1aq
worse[d | o
|
qua 19g
|
S[RUISINUT
0} IYSIOR
| 4mep sag
|
|
quo1g
quay rag
SIPPUN
quay 139g
S[BUIsIvU pe
03 PG WIPEM
quag 19g
TIPEM
Curved
quag leg
y}sue]
"quay sq |
TIPEM |
Straight
qysue'T
17.5
ont
9.5
7.5
al
7
12
12
10
45 2.75
49 2.5
42 2.
50) 10.
4511.2
24.8 11210.
24.25 115 9.5
21.5
122)
77 27.
22.2
21.
| 10.8
| 33
4510.75 51
109, 8.75 44 9.4
48
16.2
7725.75 128 |
111
14.75 7422.
19.75
[Proc. 4TH Ser.
Vor. II, Pr. 1] VAN DENBURGH—GALAPAGOS TORTOISES 315
General remarks.—The Hood Island tortoise probably never
attained great size. None of our specimens is fully adult, but
I should judge that an adult would not be larger than a Dun-
can tortoise. It is probable that the Charles Island and the
Hood Island tortoises were very similar in shape, but the
Hood Island ones are narrower than the specimens which are
thought to have originated in Charles Island.
Field Notes—Hood Island was reached September 24, 1905.
Various parts of the island were explored during this visit
which ended October 2. On September 27, Mr. Beck found
some fragments of tortoise bones on the western end of the
island. They were lying on the ground among the lava blocks
and were exposed to the sun. These fragments were the only
signs of tortoises. Hood Island was visited again from Janu-
ary 31 until February 7, 1906. A piece of tortoise carapace
and some old droppings were found near the top of the island.
On June 23, 1906, the anchor was again dropped in Gardner
Bay. Exploration revealed no evidence of tortoises until June
26, when, as Mr. Slevin records: [Mr. Ochsner and I] went
into the interior at the east end of the island and picked up
some lizards, which are abundant everywhere. We reached an
elevation of about 300 feet and, in a grove of cactus trees
about two miles inland from Gardner Bay, ran on to a tor-
toise. The country here is very brushy, and the ground is
covered with small rocks, so that no trails can be seen any-
where. The tortoise was lying in the shade of a large cactus
at the edge of a thick patch of brush. It appears to be an
adult female. No other signs were encountered and it is only
great luck to find a tortoise, as there are no trails to follow.
June 27, 1906.—Went again after tortoises to the same
country we visited yesterday. Mr. King had the good fortune
to find a tortoise, this time in the thick brush near the edge of
a large open area. It appears to be an adult female. Beck
went over to the northwest end of the island and says he got
into good tortoise country. He saw no signs of living tor-
toises but found some good bones.
June 28, 1906.—Went in after tortoises again but failed to
find any. We however found a very fresh sign; but the brush
was so thick that we could not find the tortoise, even after a
316 CALIFORNIA ACADEMY OF SCIENCES [Proc. 4TH Ser.
long search. Examined some fresh droppings, and found it
contained the red bark of the cactus and coarse grass. The
tortoises evidently feed poorly, as the goats, which run thick
all over the island, keep the cactus eaten up as soon as it falls.
June 29, 1906.—Still searching for tortoises but find no
signs.
June 30, 1906.—Went in again after tortoises. No luck.
July 2, 1906.—Beck was in after tortoises, and found one
small one about four miles inland from Gardner Bay. Evi-
dently they have been well cleaned out.
Testudo elephantopus Harlan
Charles Island Tortoise
Plates 55 and 56.
? Testudo nigra Quoy & Garmarp, Voy. Uranie et Physic., Zool.,
1824, p. 172, pl. XI; Dumérm & Brsron, Erpét Génér., II, 1835, p. 115;
WircMaAnn, N. Acta Leop.—Carol., XVII, 1835, p. 118, ‘pl. XTII;
SrraucH, Mém. Ac. St. Petersb. (7), V. No. 7, 1862, p. 85.
? Testudo californiana Quoy & GAIMARD, Bull. Sci. Nat., I, 1824, p.
90, pl. XI [substitute name].
Testudo elephantopus HARLAN, Journ. Ac. Nat. Sci. Phila., V, 1827,
p. 284, pl—; Hartan, Medical & Physical Researches, 1835, p. 190, pl.;
Jackson, Journ. Boston Soc. Nat. Hist., I, 1837, p. 443, pls. X-XI.
? Testudo indica Gray, Syn. Rept., 1831, p. 9 (part).
Testudo galapagoensis Baur, Am. Nat., XXIII, Dec. 1889 [1890], p.
1044; Gtnruer, Nov. Zool., IX, 1902, p. 184, pls. XVI-XXI; HELteEr,
Proc. Washington Acad. Sci., V, 1903, p. 53; SreBENROCK, Zool. Jahrb.,
Suppl. X, 3, 1909, p. 533.
Type specimens.—?Testudo nigra: Paris Museum. Young.
Straight length about 10% inches. Presented to M. de Frey-
cinet by Captain Meek of the “Boston Eagle’ while the
“Uranie”’ and ‘“Physicien” were in the Sandwich Islands. It
was said to have come from California.
Testudo elephantopus: Academy of Natural Sciences of
Philadelphia. Probably No. 366. Young. Curved length 21.5
inches. Taken in the Galapagos Islands.
Testudo galapagoensis: Boston Society of Natural His-
tory. Skeleton of adult male. Curved length 45 inches.
Taken, probably on Charles Island, by Captain John Downes,
in 1833, and presented in June, 1834.
Distribution This tortoise formerly was abundant on
Charles Island to which it was confined. It probably is now
extinct.
Vox. II, Pr. 1] VAN DENBURGH—GALAPAGOS TORTOISES 317
Material—The Academy’s collection contains no specimens
of the Charles Island tortoise. In addition to the skeleton in
the Boston Society of Natural History, three other specimens
have been referred to this species by Dr. Giinther. These are
the carapace of an adult male in the Rothschild Museum at
Tring, England, a female in the Harvard Museum of Com-
parative Zoology, and probably a male in the Peabody Acad-
emy of Science in Salem, Massachusetts.
Diagnosis—No nuchal; gulars paired; third! cervical ver-
tebra biconvex; front of carapace fairly high; carapace inclin-
ing toward the saddle-shape, broad, depressed, flat-backed,
rather broad anteriorly ; first marginals not much enlarged, not
everted, their ventral surfaces not vertical, their most prominent
points not widely separated; length over curve not more than
125% (120-125%), less than width over curve; vertical dis-
tance from lower surface of plastron to lower edge of lateral
marginals great ; general size large, straight length 37.5 inches;
plastron moderate, median length 75 to 80%; plates generally
smooth; pectorals forming a suture on median line; eighth
marginal large with a long superior border.
General Remarks.—The Charles Island tortoise was closely
related to that of Hood Island, but was of a somewhat broader,
and perhaps smoother type. No tortoise has been taken in
Charles Island for many years and there can be little doubt
this race is extinct.
Neither Mr. Slevin nor any other member of the Expedition
found anything to indicate the presence of tortoises on Charles
Island. Not even a bit of bone was found, although much time
was spent in searching on various parts of the island, as the
following extracts from Mr. Slevin’s notes show:
Field Notes—Oct. 4, 1905.—Went ashore at Post Office Bay
and worked towards the interior. Found animal life of every
description scarce. No signs of tortoises, nor any bones, were
seen.
Oct. 5-6, 1905.—Ashore at the northeast end of the island.
No reptiles seen except Tropidurus and geckos.
1This probably is an abnormal, individual variation. The same condition has
been described in the type of T. becki in which the fourth normally is biconvex as in
the other races.
318 CALIFORNIA ACADEMY OF SCIENCES [Proc. 4TH Ser.
Oct. 7, 1905.—Went ashore at Black Beach and followed
along the road, which is more properly a trail, quite a distance
inland. I saw no reptiles of any description except geckos.
This part of the island is thickly wooded, and has no large lava-
fields ; more green vegetation and soil.
Oct. 9, 1905.—Went ashore at Black Beach and worked into
the interior up to some springs south of the highest peak.
Oct. 10, 1905.—Worked up to the top of the crater on the
highest mountain, but saw no signs of any reptiles whatever.
It rained quite often near the summit; so I worked down into
a valley to the south, and found clear open country with plenty
of cattle trails and everything green. Worked down toward
the coast with the ocean on the south side in view. No tortoise
bones were found. Nothing has been seen by any of the party.
Oct. 11, 1905.—Worked toward the interior southwest of
Black Beach. The country is fairly open. Saw no sign of any
reptiles except geckos.
Oct. 12, 1905.—Worked into the interior to see if I could
find any lizards or snakes. Found fine open country with
everything green, wild cattle, hogs, etc. Found no trace of any
reptiles whatever.
Feb. 26, 1906.—Went ashore at Cormorant Bay.
Feb. 27-Mar. 2, 1906.—Black Beach. No reptiles of any
description, other than geckos, were seen by any of the party
during their hunting trips on this part of the island.
May 15-16, 1906.—Went in from Black Beach camping to
shoot cattle and lay in a supply of meat. Stayed two days,
and brought down two loads.
May 17, 1906.—Stopped about an hour at Cormorant Bay.
May 23, 1906.—Collected near Black Beach.
May 24-June 1, 1906.—Stayed in camp getting beef.
June 2, 1906.—Went up to the highest mountain on the
island, and climbed to the top. This tramp, like a long trip
around the south side of the island on the 25th of May, showed
no signs of any reptiles whatever.
June 4, 1906.—Went up the trail to about 600 feet elevation,
and collected a few more geckos.
Vor. II, Pr. I] VAN DENBURGH—GALAPAGOS TORTOISES 319
Testudo darwini Van Denburgh
James Island Tortoise
Plates 56 to 63.
Testudo darwini VAN DENBURGH, Proc. Cal. Acad. Sci. (4), I, 1907, »
p. 4; SIEBENROCK, Zool. Jahrb., Suppl. X, 3, 1909, p. 533.
Type specimen.—California Academy of Sciences No. 8108.
Adult male. Straight length 38 inches. Taken on James
Island, by R. H. Beck and Joseph R. Slevin, July 31, 1906.
Distribution —This tortoise seems now to be confined to the
less accessible parts of James Island. It formerly was very
abundant, but seems now to be very near extinction.
Material.—Although this tortoise was taken from the Gala-
pagos Islands in great numbers by vessels which visited them
in early days, no specimen of it seems to have been preserved
in any museum until the recent expedition secured five for the
Academy.
Diagnosis —No nuchal; gulars paired; fourth cervical ver-
tebra biconvex; carapace high, elongate, somewhat dome-
shaped but high in front; posterior declivity beginning about
middle of third vertebral; height at nuchal notch more than
41% (42 to 45%) of straight length; difference between per-
centages of height at third vertebral and at nuchal notch in
male more than 9 (10 to 14); carapace not saddle-shaped,
width at margin of junction of second and third marginals 48
to 58% ; width over curve in male not greater than length over
curve; vertical distance from lower surface of plastron to lower
edge of lateral marginals moderately great, 7 to 9%; general
size large, straight length 38 inches; shell heavy ; pectoral plates
forming a suture on median line; eighth marginal not reduced ;
the sum of the measurements of the length over curve, length
of plastron, height at nuchal notch, and height at third ver-
tebral, equals or exceeds the sum of the measurements of the
straight length, straight width, and width over curve; jaws and
throat black marked with yellow.
September 30, 1914.
[Proc. 4TH Ser.
CALIFORNIA ACADEMY OF SCIENCES
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Vor. II, Pr. I] VAN DENBURGH—-GALAPAGOS TORTOISES 321
General remarks.—The James Island tortoise is a very large,
heavy, thick-shelled species which resembles most closely the
tortoise of Jervis Island and the Testudo vicina of southern
Albemarle. It is somewhat intermediate in shape between the
saddle-backed and dome-shaped races. The front of the cara-
pace is high, but the middle of the back rises still higher. There
is but little narrowing of the front of the carapace.
Field Notes.——December 26, 1905.—Went down the coast to
a place which the Captain says is marked in his epitome as
Adam’s Cove. Beck and Williams went inland to camp and
look for tortoises.
Jan. 2, 1906.—Mr. Beck returned on the 29th from a trip
to the interior. He reports stopping at the camp where the
hunters for tortosies encamped, and says there were bones scat-
tered all about. He collected some of the best specimens,
which will be packed in a box. Williams says he saw an old
piece of dung at the same place. No fresh signs of tortoises
have been seen by any of the party so far.
July 27, 1906.—Sailed from Seymour early in the morning
and anchored off the coast of the east end of James Island near
Bartholomew. The country presents a very desolate appear-
ance. It is all fresh lava with a few cacti and some brush.
Intend to go in after tortoises tomorrow.
July 28, 1906.—Went inland for tortoises. Followed up a
valley toward Bartholomew Island, and found the brush and
cactus thicker as we got higher. I saw no fresh signs of tor-
toises, but Beck says he saw some about three weeks old. He
also picked up a few old bones.
July 30-August 4, 1906.—Went in after tortoises about five
miles northwest of Sullivan Bay. The country is extremely
rough—the worst we have encountered since we arrived in the
islands. The lava-flows are all comparatively recent, and many
places have no vegetation whatever. There is a valley opposite
our anchorage which runs into the interior, and is fairly thick
with cactus, small trees, and shrubs. We went up this valley
about a mile, and saw our first signs of tortoises. There is
no earth whatever here; everything is lava, and it is impos-
sible to do any trailing. King, Beck and I looked over the
surrounding country for three or four hours. We saw fresh
signs, but found no tortoises. I returned to the ship, while
399 CALIFORNIA ACADEMY OF SCIENCES [Pnoc. 41 Ser.
Beck and King went farther up to camp. When I went in to
the camp the next day, Beck had found two large male tor-
toises about five miles up the valley, and in better, or very good,
tortoise country. We found plenty of earth and cactus here
and everything in favor of finding tortoises. King had one of
the males partly skinned, so I helped him finish it, and we
brought it out to camp. Beck went over toward the main
mountain, and covered lots of country, finding two more males
and a female. He went over the next day and skinned the
female and another small one which he found on the way, and,
with the assistance of Ochsner and Hunter, who came in to
help us carry, brought them to the camp. King and I took
the first male, which we had skinned, part way down to the
vessel. The country was so rough and hard to get over that
our shoulders became so sore that we could not hold the tor-
toise up any longer, so had to leave him in order to get to the
beach by dark. The rest of the party, who were to help us
out, missed us on the way, so King and I had to go it alone.
They found the tortoise on the trail and, carrying it the rest
of the way, reached the beach just at dusk. These tortoises
have the heaviest shells and bones of any taken by us. The old
males were not black (as Porter described them) but the fe-
males seem to be quite black. They are all very fat, more so
than any we have seen yet. The fat is of a rich yellow color
and looks almost like butter. The two males taken are some-
what unlike in shape. The other two males Beck found are
far over toward Jervis Island, and it will be impossible for
us to get them out. It was very difficult to get out the ones
we did. No wonder people don’t find tortoises on James!
King got the measurements as well as possible, but it is im-
possible to get accurate measurements for the reason that a
tortoise can throw a person in any direction he pleases with
one of his legs. I got the measurements of the second male.
Beck skinned the females and no measurements were taken.
Beck found that these females contained large yolks, but there
were no signs of shell on any of the eggs as yet. We saw no
signs of any nests, so probably the breeding season commenced
during June and July.
August 6, 1906.—Sailed for James Bay, and straightened
up things on board. Sailing along the coast, we soon lost sight
of the barren lava-flows, and everything appeared thickly
Vou. Il, Pr. I] VAN DENBURGH—GALAPAGOS TORTOISES 323
wooded. The green zone on top was plainly visible, as the
day was fine and clear. We passed by the cove where the tor-
toise-hunters went in, and saw good tortoise country along
the hillsides. We anchored about three o’clock.
August 7, 1906.—Went up some distance into the interior,
about to the beginning of the green zone—1200 feet.
August 9, 1906.—Sailed from James Bay for Cowley
Mountain.
Testudo chathamensis Van Denburgh
Chatham Island Tortoise
Plates 64 to 69.
Testudo chathamensis VAN DeENBURGH, Proc. Cal. Acad. Sci. (4), I,
1907, p. 4; SIEBENROCK, Zool. Jahrb., Suppl. X, 3, 1909, p. 533.
Type specimen.—California Academy of Sciences No. 8127.
Skeleton of adult male. Straight length 35.25 inches. Found
in a cave on Chatham Island, by R. H. Beck and Joseph R.
Slevin, Feb. 12-14, 1900.
Distribution.—Chatham Island.
Material.—The Academy has a skin with bones of an adult
female, the bony carapaces of two adult males and a number
of skulls and other bones. The Honorable Walter Rothschild
writes me that he has a young male specimen. It is probable
that this species is now almost or quite extinct.
Diagnosis ——No nuchal; gulars paired; fourth cervical ver-
tebra biconvex; carapace depressed, front elevated in male;
height at nuchal notch less than 41% of straight length (male
34 to 36 female 27%) ; male flat-backed, female dome-shaped,
difference between percentages of heights at third vertebral and
at nuchal notch 6 to 11 in male, 24 in female; carapace of
male slightly saddle-shaped but broad, width at margin of
junction of second and third marginals 53% in male; anterior
marginals but little everted; length over curve in male 112 to
117%, female 126%; vertical distance from lower surface of
plastron to lower edge of lateral marginals small, 4% to 6% ;
general size moderate, straight length in male 35.25 inches,
female 22.5 inches; pectoral plates much reduced, not meeting
on mid-line; eighth marginal plate not reduced; jaws and
throat of female black.
324
CALIFORNIA ACADEMY OF SCIENCES
TABLE OF MEASUREMENTS OF CHATHAM ISLAND TORTOISES.
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[Proc. 4TH Ser.
Vor. II, Pr. 1) VAN DENBURGH—GALAPAGOS TORTOISES 395
General remarks.—The Chatham Island tortoise is one of
the lowest, most depressed, of the Galapagoan races. It is
most similar in shape to Testudo gtintheri and Testudo micro-
phyes of Albemarle Island. It differs from both in the fre-
quent, or perhaps constant, reduction of the pectoral plates.
The only living specimen found by our expedition was a small
but very old female. It is much more dome-shaped than the
males found in the cave. It had lost one of its fore limbs in
early life, only the head of the humerus remaining, and the
shell is not symmetrically developed, being smaller on this
side.
Field Notes—October 15-18, 1905.—Three days were spent
in hunting near Wreck Bay, Chatham, but only geckos and
Tropiduri were found.
Jan. 24, 1906.—Anchor was again cast in Wreck Bay.
Jan. 25, 1906.—Went ashore for the morning. Pouring
rain most of the time. No one did much collecting except near
the beach. Found only a few geckos and Tropiduri.
Jan. 26, 1906.—Weather dried up a little, and we went
ashore again. Too wet to do much.
Jan. 27, 1906.—Went ashore collecting, and made for higher
altitudes. Went up to about 800 feet, and found everything
wet and muddy with no signs of any reptiles.
Jan. 29, 1906.—Went to the top of Chatham Island. Found
the country different from anything seen so far. It is just
like large pastures and fields of grass. The soil is damp every-
where, and no reptiles were seen. The country to the east is
a large plateau, and seems to be wooded fairly well in some
portions. There are many small lakes on the opposite side
from our anchorage (the southwest side). The island is so
easily accessible that it seems hardly probable that there could
be a tortoise left on it. The next time we stop here, we prob-
ably shall be able to explore the other side for a couple of
days at least, if the weather is good.
Feb. 7, 1906.—Sailed at day-break for Fresh Water Bay,
Chatham Island, but on account of wind and currents failed
to make it; so made an anchorage east of Stephens Bay.
Feb. 8, 1906.—Went ashore at our present anchorage, and
worked up to about 1000 feet altitude. The country is all
rough lava thickly grown over with trees and shrubs. The
396 CALIFORNIA ACADEMY OF SCIENCES [Proc. 41TH Ser.
higher portions look like good tortoise country, and are more
open than below. No signs of tortoises were encountered,
however, and no bones were found. Everything is very green,
and the ground had been thoroughly soaked by recent rains.
We expect to sail for Stephens Bay in the morning.
Feb. 10, 1906.—Went ashore at Sappho Cove and worked
inland. The country is a plateau of recent lava, covered spar-
ingly with cactus and fairly well with trees. Beck worked in
the same general direction and had the great fortune to run
on to a tortoise. It was eating cactus (Opuntia) when found.
The right fore-leg was missing, and it seems hard to tell
whether this was natural or the result of an accident. The
ovaries contained eggs in yolk form. The locality where this
tortoise was found was about four miles inland from Sappho
Cove, and at about 300 feet elevation.
Feb. 12-14, 1906.—Went into the interior with Beck to
search for tortoises. We worked for two days and a half
around the central portion of the island without finding the
least sign of a living tortoise. The entire country is rough
lava overgrown with brush and trees. Cactus is fairly abun-
dant. Cereus is the most common, while Opuntia is fairly
common. ‘Tortoises are likely to be found around the Opuntia
if any are present, for the flat leaves often fall to the ground,
and the spines are not so tough as those of the Cereus. We
went to the top of a small hill and took the following bear-
ings for the position of the living tortoise taken on February
10th: Mt. Pitt bore N. E. % N.; Finger Point bore N. W.
by W. Kicker Rock bore W. by N.; top of island bore S. W.
4 S.; East Rock bore S. E. by E. The tortoise lay about
three miles due west of this position. We had the good for-
tune to run across a large cave containing the remains of about
seventeen tortoises. We made our headquarters in this cave,
and looked over all the remains, collecting the best specimens.
I made measurements in all possible cases of those we could
not take.
1.—Collected a good set of bones, marked O. [C. A. S. No.
8128]. The carapace was far gone and not worth taking,
inasmuch as we got good specimens. The plastron was intact.
It was sunken like a male tortoise, and the indentation was
very prominent with a ridge on the back part, as in the male
Vor. II, Pr. I] VAN DENBURGH—GALAPAGOS TORTOISES 327
tortoises of Duncan Island. Length of plastron 610 mm.;
width at front curves 300 mm.; greatest width of shell 570
mm.; length of indentation in plastron 340 mm.; width
of indentation 320 mm. Some of the marginal plates were
loosely attached to the carapace. Some old dried grass from
the intestines could still be seen and several old plates of a
brown color but nearly rotted away were near the remains.
2.—Bones marked X [C. A. S. No. 8129] from remains
so badly rotted away that no measurements could be taken.
3.—Skull marked 8 [C. A. S. No. 8130]. No bones or
shell could be found near by.
4.—Collected one shell with carapace and plastron in per-
fect condition [C. A. S. No. 8132], but no bones were found
with it.
5.—Found one old shell which measured as follows: Length
of plastron 440 mm.; width between front curves 230 mm. ;
greatest width of shell 410 mm. Several bones were near by,
shoulder bones and pelvis, but very soft and crumbling away.
6, 7.—Saw two more skeletons all crumbled away so that
no measurements could be taken.
8.—A shell in fairly good condition. Greatest width of
shell 523 mm.; greatest length of shell 665 mm.; distance
between front curves of plastron 270 mm.; distance between
hind curves of plastron 310 mm.; width of plastral indenta-
tion 280 mm.; length of indentation 340 mm. This was prob-
ably a male, as the indentation in the plastron is very promi-
nent with a ridge at the back as in the male Duncan tortoises.
Skull marked with a star [C. A. S. No. 8131] belongs to
this tortoise. The other bones were in bad condition.
9.—One old carapace showed the following measurements :
length of carapace 670 mm.; width between front curves of
plastron 320 mm. ; between hind curves of plastron 400 mm.
10.—One old piece of plastron found. Width between front
curves 205 mm.
11.—Bones and large shell collected [C. A. S. No. 8127],
marked with a rectangle. Four marginal plates still on the
front of the carapace.
12.—One old skeleton in which the front curves of the plas-
tron measured 200 mm.
13.—One old skeleton. Greatest width of shell 405 mm.;
width between front curves of plastron 215 mm.
398 CALIFORNIA ACADEMY OF SCIENCES [Proc. 4TH Ser.
14-15.—Two more skeletons all crumbling away.
It appears that the tortoises fell into this cave while in
search of food or water. Once in, it was impossible for any
to get out, and consequently they starved to death. Some of
the shells lay with the plastron upward, while others were in
a perfectly natural position. They were protected from mois-
ture and probably had been in the cave many years.
Feb. 15, 1906.—Sailed for Fresh Water Bay.
Feb. 21, 1906.—Arrived at Wreck Bay this morning after
an attempt to reach Fresh Water Bay.
Feb. 22, 1906.—Met the schooner from Guayaquil and saw
the Captain, who is an Englishman. He says he has taken
tortoises on Chatham Island, and that he ate the last one on
the island some twenty years ago.
July 3—July 8, 1906, were also spent at Chatham, but noth-
ing further was learned regarding tortoises.
Vou. Il, Pr. 1] VAN DENBURGH—GALAPAGOS TORTOISES 329
Testudo microphyes Giinther
Tagus Cove Tortoise
Plates 70 to 83.
Testudo microphyes GUNTHER, Trans. Royal Soc. Lond., CLXV, 1875,
p. 275, pls. 36, 37 fig. B, 38 fig. B, 39 fig. B; GUNTHER, P. Z. S., 1877, p. 66;
Gutnruer, Gigantic Land Tortoises Brit. Mus., 1878, p. 78, pls. XXXII-
XXXVIII, XLII fig. B, XLIII fig. B, XLIV fig. B, XLV figs. A-C;
BouLeNcER, Cat. Chelonians Brit. Mus., 1889, p. 170; STRAucH, Mém.
Acad. Sci. St. Petersb. (7), XXXVIII, 2, 1890, p. 53; VAILLANT, Bull.
Mus. d’Hist. Nat. Paris, 1900, p. 228, Hetrrr, Proc. Washington Acad.
Sci., V, 1903, p. 56; BECK, Seventh Report N. Y. Zool. Soc., 1903, p. 13's
SIEBENROCK, Zool. Jahrb., Suppl. X, 3, 1909, p. 534.
Type specimen—British Museum. Adult female. Straight
length 22.5 inches. Origin unknown.
Distribution.—Giinther and other authors have thought that
Testudo microphyes was confined to the vicinity of Tagus
Cove, Albemarle Island. The Academy’s collection, however,
contains specimens from Cape Rose, on the southern coast
of Albemarle Island, which I am unable to distinguish from
those secured at Tagus Cove.
Material.—The Academy has thirteen males and one young
female from Tagus Cove, and four males and a female from
Cape Rose. Many museums contain specimens of this tortoise,
which is not rare in collections.
Diagnosis—No nuchal; gulars paired; fourth cervical ver-
tebra biconvex; front of carapace low, in males higher than
in females; height at nuchal notch not more than 44% (34 to
43%) of straight length; difference between percentages of
front and middle heights less than 14 (2 to 14); carapace
not saddle-shaped, not narrow anteriorly, width at margin
of junction of second and third marginals not less than 46%
(46 to 57%) ; first marginals not enlarged, not everted, their
ventral surfaces not vertical, their most prominent points sepa-
rated by less than 25% (15 to 24%); length over curve not
more than 123% (114 to 123%) ; width over curve less than
length over curve or exceeding it by less than 5%; vertical
distance from lower surface of plastron to lower edge of
lateral marginals small, 3 to 7%; general size large, straight
length 25 to 40.5 inches; plastron short, 65 to 80%; plates
nearly smooth in adults; pectorals forming suture on median
line; eighth marginal plate not reduced ; lower jaw and throat
of males not marked with yellow.
CALIFORNIA ACADEMY OF SCIENCES [Proc. 41m Ser.
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332 CALIFORNIA ACADEMY OF SCIENCES [Proc. 41H Ser.
General remarks.—The tortoises of Tagus Cove Mountain
and vicinity are very different from those of the northern end
of Albemarle Island. The males have low shells with flat
backs, the front of the carapace being but little below the level
of the middle of the back. The shell is thin and light. These
tortoises bear most resemblance to those of Chatham Island
and the 7. giintheri of southeastern Albemarle. The males
from Cape Rose seem to be absolutely identical with those
from Tagus Cove.
Field Notes—March 23, 1906.—Anchored at Tagus Cove.
Beck and King went ashore to hunt for tortoises. Beck found
two. One of these he skinned and brought on board this even-
ing. It is a male.
March 24, 1906.—Went in with King to get the tortoise
found yesterday. The country in the vicinity of the cove is
somewhat barren, and, on the hillsides and in the valleys,
several fresh lava-flows can be seen that have no vegetation
at all. The place where we saw the signs of tortoises is a val-
ley about a mile from the shore. Most of it was grown over
with brush, but thick only in places. We saw several old
skeletons with the bones crumbled to dust. There were no
fresh signs of tortoises, other than the two found. The one
we got today was at the farther end of the valley, right on
the edge of a barren lava-flow. While King and I got this
one out, Mr. Beck went hunting for more tortoises, and
found a large male at the foot of the mountain and directly
opposite the cove. I suppose we shall go in for him tomorrow.
March 25-31, 1906.—Worked on tortoises up on the moun-
tain all the week. We found no fresh trails in the valley,
so went up the mountain, which presents a similar appearance
as regards growth of trees, etc. There are two large lava-
flows extending down the mountain sides, with green patches
on them, and some of these were well cut up with tortoise
trails. The tortoises work all through the brush on the moun-
tain side, and it cannot be said that they are rare; but it is so
much work to get them, that people report them scarce. The
females, however, appear to be rare, as none have been found
by us so far. They are smaller than the males and have
more fat, so that they probably have been killed by oil-hunters
when they came down into the valley. All the tortoises we
Vor. II, Pr. I] VAN DENBURGH—GALAPAGOS TORTOISES 333
have taken were heading up the mountain. At Tagus and
Iguana coves I noticed that the tortoises were covered with
ticks all over the skin and along the cracks between the plates
of the plastron. Cactus is somewhat scarce here compared with
other places, and the chief part of the tortoises’ diet is a coarse
grass that is abundant on the hills and in the valleys. The
tortoises here seem to be of a uniform size and have thin
shells.
April 2, 1906.—During the morning I worked on board
with tortoises, etc. Mr. Beck went over to Narborough to
hunt for tortoises. King and I went up to camp this after-
noon, to carry out a tortoise we had tied up on the mountain.
April 3, 1906.—Skinned the tortoise and carried him out—
a good day’s work.
April 4, 1906.—King and I went to the foot of the mountain
to get a tortoise Beck said he had tied up, but after hunting
all day failed to find it. We obtained a good view of the
north side of the mountain, which appears to be all fresh lava
with very few patches of vegetation. The whole country to
the north is fresh lava. Cape Berkeley was plainly visible,
and appeared very high and steep. The mountain at Banks
Bay was also seen, but the character of the country and vege-
tation could not be made out.
April 7, 1906.—Went ashore to get the tortoise Beck tied
up several days ago. We found him a long way up the moun-
tain and not where Beck told us to look. His stomach con-
tained grass,
March 14, 1906.—We sailed down the coast toward the high
mountain at Iguana Cove, and anchored at evening about six
or eight miles east of it.
March 15, 1906.—Went ashore, about two miles west from
our anchorage, at a small cove on the coast in the vicinity of
Cape Rose. We got into a fine tortoise country, where the
natives had been killing off the tortoises some years ago. There
was a small plateau, well cut up with cattle trails and having
abundant cactus (Opuntia). There was also an abundance
of the trees which produce a fruit that looks like a small apple.
This fruit appears to have a somewhat poisonous effect, and
goes through the tortoise like a purge. The tortoises taken
here were full of this fruit, and the intestines were much
334 CALIFORNIA ACADEMY OF SCIENCES [Proc. 41TH Ser.
swollen and very thin, so that they looked almost membranous.
The fruit passes through the intestine unchanged except in
color, which fades from green to a light yellow. The tortoises
seem to prefer this food to cactus, for there was an abundance
of the latter all around. The tortoises taken at this particular
place seem to be much fatter than any taken thus far, and their
shells are very light for their size.
July 27, 1906.—Stewart says the plant with the apple-like
fruit is Hippomane mancinella,
Vor. Il, Pr. I] VAN DENBURGH—GALAPAGOS TORTOISES 335
Testudo giintheri Baur
Vilamil Mountain Tortoise
Plates 84 to 92.
Testudo elephantopws GOntHER, [nec Harlan] Trans. Royal Soc.,
CLXV, 1875, p. 261, pls. 33, 37 fig. A, 38 fig. A, 39 fig. A, 40 fig. A, 41 fig. B,
42 fig. A, 43, 44 figs. A,A’, C.D; GUNTHER, Gigantic Land Tortoises Brit.
Mus., 1877, p. 63, pls. XXX fig. A, XLII fig. A—XLIV fig. A, XLVI fig.
A, LI—LIII; Roruscuitp, Novit. Zool., IX, 1902, p. 448; RoTHscHILp,
Novit. Zool., IX, 1902, p. 618; HELLER, Proc. Washington Acad. Sci., V,
1903, p. 53; SIEBENROCK, Zool. Jahrb., Suppl. X, 3, 1909, p. 532.
Testudo nigra BouLENGER, Cat. Chelonians Brit. Mus., 1889, p. 170.
Testudo giintheri Baur, Am. Nat., XXIII, Dec. 1889 (1890), p. 1044.
Type specimen.—Oxford Museum, England. Skeleton of
adult male. Straight length 31 inches. Purchased of a dealer
in Paris. Origin unknown.
Distribution.—Vilamil Mountain and vicinity in the south-
eastern part of Albemarle Island.
Material—There are in the Academy’s collection forty-
one specimens which I refer to this race. The Tring museum
has a number of specimens.
Diagnosis—No nuchal; gulars paired; fourth cervical ver-
tebra biconvex; front of carapace from 5 to 22% lower than
middle; height at nuchal notch not more than 44% (29 to
44%) of straight length; difference between percentages of
heights at third vertebral and at nuchal notch more than 5 (5
to 22) ; carapace not saddle-shaped, broad anteriorly, width at
margin of junction of second and third marginals not less than
46% (46 to 61%) ; first marginals not everted, without promi-
nent points; length over curve not more than 128% (114 to
128%), never greater than width over curve; vertical distance
from lower surface of plastron to lower edge of lateral mar-
ginals small, 3 to 9% ; general size usually rather small, straight
length 23.7 to 40 inches; plastron of moderate length, 70 to
87%, often with posterior knobs even in females; plates gen-
erally smooth in adults; pectorals forming a suture on median
line; eighth marginal plate not reduced, with a considerable
superior border; lower jaw and throat in males sometimes
marked with yellow.
September 30, 1914.
[Proc. 4TH Ser.
CALIFORNIA ACADEMY OF SCIENCES
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338 CALIFORNIA ACADEMY OF SCIENCES [Proc. 41TH Ser.
General remarks.—The tortoises of southern Albemarle pre-
sent many difficulties. The specimens from Iguana Cove seem
to be quite uniform in shape, and it is probable that only
Testudo vicina occurs there. Somewhat farther east, at Cape
Rose, are found tortoises which I am unable to distinguish
from those taken at Tagus Cove, which again appear to be
constantly of one type. But when one collects still farther
east, on Vilamil Mountain or in the vicinity of Turtle Cove
or the old Cobos settlement, tortoises of two distinct types are
found together. Those of one type agree closely with the tor-
toises of Iguana Cove, and I| therefore include them under the
head of Testudo vicina. Those of the other type are much
more depressed, with less elevated backs, with the height to
marginals very low, and have very smooth shells. These |
refer to another race, for which the name Testudo giintheri
seems available. They resemble both the Tagus Cove and
the Chatham Island tortoises in many respects. A few speci-
mens, included in the second table of measurements, are nearly
intermediate in shape between the typical 7. giintheri and the
dome-shaped females of 7. vicina, Altogether, the problem
is a difficult one, and I am in some doubt whether these tor-
toises which I have called T. giintheri are really a distinct
race or merely old individuals of the same race as those I
have referred to 7. vicina. I cannot understand, however,
how age could produce changes in shape such as exist, and I
therefore think it probable that the two great mountains of
southern Albemarle—at Iguana Cove and Vilamil—each de-
veloped its own peculiar race of tortoise, perhaps at a time
when these mountains were separate islands. If this view be
correct, 7. vicina has spread eastward more rapidly than T.
giintheri has wandered toward the west. The following field
notes are based upon tortoises of both kinds.
Ten eggs (No. 8426) taken Sept. 1, 1906, from tortoise
No. 8197, measure 2.38x2.30, 2.37x2.36, 2.37x2.30, 2.37x2.24,
2.34x2.25, 2:338x2:28, 2.33225, 2.30x2.30,) 2:2/7x2'25 and
2.21x2.25 inches. The smallest eggs in our collection measure
2.10x1.87 and 2.01x1.90 inches. They are No. 8430 and were
taken from tortoise No. 8197.
Field Notes.—Oct. 30, 1905.—We sailed for Turtle Cove,
on leaving Brattle, and anchored early in the afternoon.
Vor. Il, Pr. I] VAN DENBURGH—GALAPAGOS TORTOISES 339
Novy. 1, 1905.—Went ashore at Turtle Cove and worked up
the trail toward the settlement. Expect to go tomorrow along
the coast in the direction of Iguana Cove, to look for some
tortoises that the natives say are near the shore.
Nov. 2, 1905.—Went down the coast west of Vilamil about
six miles to look for tortoises where Beck found them before.
The country is level and cut up with cattle trails. We found
five tortoises during the day. They all were taken near the
cattle trails, in small patches they had dug up under the bushes.
As they were found fairly near the beach, we brought four
aboard alive, only skinning one that was farthest inland. These
were the only tortoises seen by the party, but we could not
well have taken more in the boat. We did not cover a great
amount of country, and the tortoises may be fairly common
in this locality.
Nov. 3, 1905.—I stayed on board all day skinning tortoises
and iguanas. Mr. Beck bought another small tortoise from
the natives today. We expect to sail for Indefatigable to-
morrow to look for more tortoises in a different locality.
March 5, 1906.—I went up the trail toward the settlement
(at Vilamil) but saw no reptiles except lizards. The country
is a large plain of lava covered sparingly with cactus and brush.
March 6, 1906.—Went down the coast north of the port and
found nothing. The country is a desert of lava. It was a
day wasted as far as enlarging the collection was concerned,
but I at least found out what the country is like.
March 7, 1906.—Went up the trail toward the settlement
and collected more lizards, but saw no other reptiles. The
weather is very hot now and has been so for several days
past. Hunter and Gifford went up to the settlement collecting.
They report seeing hundreds of bones of tortoises along the
trail and at several water-holes where the tortoises used to
gather. No live tortoises were seen below the settlement, and
the natives say all have been killed off there, and that they no
longer are abundant on the mountain.
March 8-9, 1906.—Worked on board ship.
March 10, 1906.—I worked on board in the morning, and
in the afternoon we sailed about ten miles down the coast
toward Iguana Cove, and anchored at eight o’clock.
March 11, 1906.—Mr. Beck went ashore and found two
tortoises.
340 CALIFORNIA ACADEMY OF SCIENCES [Proc. 4TH Serr.
March 12, 1906.—Went ashore about a mile west of our
anchorage to hunt for tortoises and to get the two Mr. Beck
found yesterday. This portion of the coast is a large plateau
which rises very gradually to the mountain at Iguana Cove
and to lower hills in the distance to the eastward. This plateau
is densely wooded with large trees and cactus and thick brush
which, fortunately, is well cut through with cattle trails. The
tortoises are rather common; at least, large ones are, while
the smaller ones seem to have been all killed by the natives,
if one may judge from the numerous skeletons scattered
through the woods. We saw, during our two days ashore
here, about ten tortosies, all males I think. They like the
shade, and in the heat of the day prefer to stay in some hollow
or under a bush. Judging from the amount of black mud on
them, they wallow in the mud like swine. We found one tor-
toise lying in a mud hole with all legs stretched out and his
head stuck in the mud. We also found one under a bush near
a cattle trail, and so skinned him and brought him part way
out. The day was very hot, and we could not make very
good time. We ran out of water, and felt anything but active.
Finally we left the tortoise on the beach down the coast and
made for our boat, breaking through brush and mangroves
every inch of the way. We reached the vessel after dark
thoroughly tired out. We expect to go ashore in the morn-
ing, when the tide is low, and bring the tortoise around by the
beach. King is pretty well under the weather, having drunk
too much water from a hole we encountered near the end of
our journey. The day was altogether too hot for us to carry
tortoises.
March 13, 1906.—Beck and I went ashore and carried the
tortoise down the coast to our boat. The tide was very low,
so we carried it around by the beach. We went inland again
from the boat to get another tortoise, and found one late in
the afternoon. We partly skinned this one, cutting out all the
heavy meat, and rushed him out to the coast, getting there
‘just before dark. In this vicinity, near the old Cobos settle-
ment, we noticed on some of the cattle trails the excrement
from the tortoises. They had eaten the fruit of a large tree,
which is abundant everywhere, and this fruit passed through
the intestines unchanged without having been chewed or dis-
Vor, II, Pr. I] VAN DENBURGH—GALAPAGOS TORTOISES 341
figured in any way. This fruit is shaped like an apple, and
about an inch in diameter.
April 25-27, 1906.—We drifted up the coast toward Vilamil
and, in the evening of the 24th anchored off the old Cobos
settlement which we call Bull Beef Anchorage. Beck says we
put in just to get some beef to salt. As King and I were the
only ones working on tortoises here, we could not get more
than one a day. We found them common near the coast, in
mudholes under the shade of trees. The ones we found were
buried in the soft black mud, with just their heads and the
tops of their carapaces exposed. It would seem that the natives
have killed off all the females, as we find only males. The two
tortoises we took had stomachs nearly empty, and evidently
had been in the mud for some time, since no traces could be
seen where they went in. There are mudholes and lagoons all
along the coast here, and cactus and grass are abundant, so
that it is ideal tortoise-country.
August 16-19, 1906.—Sailed from Duncan, early on the
morning of the 16th, for Vilamil, where we arrived on the
evening of the 19th, after four days spent in beating against
the wind and strong currents.
August 20, 1906.—Sailed into Turtle Cove, to our anchor-
age. We had to anchor outside last night as we arrived about
dark, too late to get in. We are making preparations to go up
the mountain to skin tortoises. A few tortoises have been
brought in by the natives from along the coast toward Cape
Rose, but they find it too much of a job to get many, having
to cut a trail for each tortoise brought out. We expect to
stay here until September 5. I have things ready now to pack
away. All the tortoise skins are ready to stow away for the
voyage home.
August 21, 1906.—Everything was ready to go up after the
large tortoises on the top of the mountain, but we could not get
the mules, so will wait another day.
August 22 to 30, 1906.—We went up with our outfit to the
hacienda to start up the mountain. At this elevation (1300
feet) the weather is constantly rainy and foggy, and the pros-
pects of camping are not very pleasant. There is nothing
visible, in the way of reptiles. The grassy area commences
at 1500 feet and extends clear to the rim of the crater, which
is at an elevation of 3150 feet. We encountered our first
342 CALIFORNIA ACADEMY OF SCIENCES [Proc. 47H Ser.
living tortoises about two miles from the top of the crater.
In this place it almost seems as though one were seeing them
in a park, for they are met simply lying around on the grass—
some feeding and others sleeping. They follow the trails
made by the cattle and pack mules, and we often had to turn
off the trail to pass by them. They are by no means rare
around this mountain, although great inroads have been made
upon them by the oil-hunters. Those we saw on the way up
the mountain were moderate-sized females. The males, being
the larger, were killed off first for their oil, and consequently
are rare.
We reached the top about noon and set our course toward a
large valley to the southwest of the mountain, where the
natives killed the large tortoises for their oil. We continued
to travel through fine pasture land free from fog and damp-
ness, for on the top of the mountain the weather is perfect.
On all sides of us were tortoise skeletons—hundreds of them!
With few exceptions, they all had been killed by the natives.
The wild dogs have a few to their credit. These may be dis-
tinguished by the carapace and plastron being intact. The
natives cut theirs open with axes. We saw no living tortoises
on this steep slope of the crater, nor did we encounter any
until we reached the level valley below. Fog hung over this
valley early in the morning, and lifted a little toward noon.
The vegetation here was the same as on the mountain—fine
green grass and small trees. We made our camp in an old
house the oil-hunters had left, and started on our search for
tortoises. We soon found two near the house, but they were
only moderate-sized ones. One of these we killed in order to
get the liver for lunch, and, while we were eating, our native
guide slipped out and cut off one of its legs for his own lunch.
This spoilt it for a skin, so we saved only the skull. We
skinned the other one in the afternoon. On our return to
camp we found that the dogs had eaten what was left of our
first tortoise. They ate even the shell, which, by morning,
was half gone.
Next morning we started with two mules and our guide to
follow the trail where the big tortoises used to be abundant,
but found that they had been slaughtered by wholesale, so
that we found no large ones. We saw only the ordinary
females, which were common. We skinned four of them.
Vor. Il, Pr. I] VAN DENBURGH—GALAPAGOS TORTOISES 343
The following day King and I skinned three, that we found
near the camp. Beck and the guide went out hunting again,
but failed to find any large tortoises. The largest skeleton we
saw measured seven spans. We collected a sack-full of old
skulls in fairly good condition. Seeing that we could not get
what was desired, Beck decided to return, and we started
back Sunday with eight tortoises we had skinned on the trip.
On the way up the mountain, and about half way to the
hacienda, King found a large male tortoise that measured
six spans. We decided to return next day and skin him. This
we accomplished, and got back to the hacienda by dark with
our ninth tortoise. This tortoise was a very old male. The
plates on the side of the carapace were loose in life, and the
plates on top all chipped up. The fore legs were scarred up
where they had been chewed by dogs. Altogether, he was a
regular old patriarch. The principal food of these tortoises
was the grass that covers the entire country for miles around.
One of the females contained eggs nearly ready to lay. The
others had ovaries somewhat less developed, several contain-
ing large yolks. One female (C. A. S. No. 8189) had a scar
in the right hind end of the carapace where a hole had healed
over. Our guide explained that the natives made these holes
to see whether the tortoises were fat enough to kill. Although
this wound had grown over, it left a large abscess in the tor-
toise, the odor from which in skinning was anything but
pleasant.
August 31, 1906.—Skinned tortoises collected by the natives
and brought to the house at Vilamil. I am not sure of the
exact locality where these tortoises were secured. I saw some
brought down off the mountain, and most of them came from
there, but probably a dozen or so came from the coast.
344 CALIFORNIA ACADEMY OF SCIENCES [Proc. 4TH Ser.
Testudo vicina Gtnther
Iguana Cove Tortoise
Plates 93 to 110.
Testudo vicina GUNTHER, Trans. Royal Soc. Lond., CLXV, 1875, p. 277,
pls. 35 fig. A, 40 fig. B, 41 figs. A, C, 45 figs. C-D; GUnrueEr, Gigantic Land
Tortoises Brit. Mus., 1877, p. 73, pls. XXXI, XLVII, fig. A, LIV, figs.
C-D; BouLeNnceErR, Cat. Chelonians Brit. Mus., 1889, p. 170; RoTHscHILD,
Novit. Zool., IX, 1902, p. 448; HELLER, Proc. Washington Acad. Sci., V,
1903, p. 54; Beck, Seventh Report N. Y. Zool. Soc. 1903, p. 7; SIEBENROCK,
Zool. Jahrb., Suppl. X, 3, 1909, p. 534.
Testudo elephantopus, BAUR, Am. Nat., XXIII, 1889, p. 1044; Lucas,
Smith. Report, 1889 (1891), pp. 643-647, pl. CIV, figs. ——; GApow, Cam-
bridge Nat. Hist., VIII, 1901, p. 378.
estudo nigrita, Corr, Proc. U. S. Nat. Mus. 1889, p. 147; Lucas,
Smith. Report, 1889 (1891), pp. 643-647, pl. CIV, fig. ——.
Type specimen.—British Museum. Carapace of adult male.
Straight length 33 inches. Origin unknown.
Distribution.—This tortoise probably is distributed through-
out the whole southern end of Albemarle Island. At Iguana
Cove it appears to be the only kind, but near Vilamil one finds
both Testudo vicina and Testudo giinthert.
Material.—This is one of the commoner species in collec-
tions. The Academy has six from Iguana Cove, ten from the
vicinity of the old Cobos settlement in southeastern Albemarle,
and forty-five from near Turtle Cove and Vilamil Mountain.
Diagnosis.—No nuchal; gulars paired; fourth cervical ver-
tebra biconvex; front of carapace moderately high in males,
much lower than middle in females; height at nuchal notch
less than 45% (31 to 44%) of straight length; difference
between percentages of heights at third vertebral and at nuchal
notch more than 9 (10 to 23); carapace not saddle-shaped,
not narrow anteriorly, width at margin of junction of second
and third marginals not less than 44% (44 to 59%) ; first mar-
ginals not greatly enlarged, not everted, their ventral surfaces
not vertical, their most prominent points separated by less
than 25% (13 to 24%) ; length over curve not less than 115%
(115 to 134%); usually less than width over curve; vertical
distance from lower surface of plastron to lower edge of lateral
marginals great, 6 to 10%; general size large, straight length
to 49.5 inches; plastron moderately long, median length 66 to
87% ; plates generally striated; pectorals forming a suture on
median line; eighth marginal plate not reduced, with well de-
veloped superior border; lower jaw and throat not marked
with yellow.
345
VAN DENBURGH—GALAPAGOS TORTOISES
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348 CALIFORNIA ACADEMY OF SCIENCES [Proc. 4TH Ser.
General remarks.—See also remarks under T. giinthert.
Testudo vicina attains a very large size. The shell usually is
quite thick and heavy. The females are dome-shaped, while
the adult males have the front of the carapace considerably
elevated. In this elevation of the front of the carapace these
tortoises resemble the Tagus Cove and James Island species.
In Testudo darwini the central portion of the back rises higher
than in T. vicina, Testudo microphyes is a smoother, lighter
race, in which the back is nearly flat. Our only specimen from
Jervis Island is nearly intermediate between T. darwinit and
T. vicina.
Nine eggs (No. 8425) from tortoise No. 8388, collected
Noy. 2, 1905, about eight miles west of Vilamil, Albemarle
Island, measure 2.44x2, 2.30x2.20, 2.25x2.12, 2.25x2.10,
2.20x2.10, 2.20x2.08, 2.18x2.10, 2.10x1.95, and 2.08x2.04
inches.
Field Notes——March 16, 1906.—Sailing to get around
to Iguana Cove. Busy all day skinning tortoises, all hands help-
ing in the morning. There is hardly any wind, and we are
drifting with the current. We are nearly abeam of the moun-
tain near the Cove. It rises very abruptly, and seems to be
well covered with brush. Several black lava-flows can be seen,
and the plateau to the eastward is all new lava.
March 17, 1906.—Anchored at noon in Iguana Cove. It is
a very bad anchorage, having deep water and heavy swells,
with not much room for the ship to swing. The coast is
heavily wooded with brush and trees, as at Cocos Island, and
is very abrupt, with many steep cliffs visible on the mountain
side. Beck, King, Williams, and I went down the coast to the
southward about two miles, and landed on a rocky beach to
hunt for tortoises. The country was covered with thick brush,
and the tortoise trails went along underneath, so that quite
often one had to go on hands and knees. The place where we
hunted was a small flat, where cactus and tall grass were fairly
abundant. We found three tortoises; all males. We drove
two of these down to the beach, as they were only seventy-five
or a hundred yards from the shore. They were too large to
get them into the boat. We failed to get them in while the
boat was on the beach. Then we towed one out and tried to
get him in; but as the boat was in the breakers and half full of
Vor. II, Pr. I] VAN DENBURGH—GALAPAGOS TORTOISES 349
water it sank when we got the tortoise aboard, and he floated
off while we struggled in the water. Luckily, King was on
the beach, for he cannot swim. Williams struck out for shore,
while Beck and I tried to turn the boat over, for by this time
the swells had rolled it bottom up. The current was too
strong for Williams to make the beach, so he came back to the
boat. With his assistance we righted it, and, getting two oars
that were stuck under the seats, Beck sculled and I pulled till
we got near the rocks. Then I swam ashore with the painter
and pulled the boat in, so Beck and Williams got ashore. We
tried to pull the boat along the rocks to the beach, but the
swell was so heavy that it was smashed into a thousand pieces.
All that we saved was the painter and two oars. I had left
most of my clothes on the beach, so only lost a shirt and a hat.
Williams lost all of his collecting outfit, canteen, etc.
By this time it was five o’clock, so we put on what clothes
we had left, and made back along the coast, while our tortoises
were drifting away out at sea. We had anything but a pleasant
walk back. JI had lost my shirt, and the thorns and cactus
spines felt anything but pleasant. We traveled on till about
eight o'clock, when we saw a light on the water and hailed
the other boat. The boys on the ship, seeing nothing of us,
had put off to the rescue in the second boat with some ropes
and life preservers. They soon found out that we were all
safe. We told them to go to the Cove and pick us up, as the
surf was too high elsewhere. We got to the Cove about the
same time as the boat, and got safely aboard a little after nine.
Beck says he is going to get what tortoises he can, and pull
out as soon as possible. All hands are anxious to leave, and
I won't shed any tears myself.
March 18, 1906.—Still anchored at the Cove. We sighted
the two tortoises drifting down the coast and, putting out
the boat, rescued both of them. One was badly battered
up, and evidently had been knocked up against the rocks
by the surf. We also picked up several pieces of our skiff.
The tortoises had been in the water about eighteen hours, and
seemed none the worse for it. They would stick their heads
out of the water occasionally and look around while they
floated along like corks, nearly all the carapace being out of
the water. We still keep on the lookout for wreckage, and
350 CALIFORNIA ACADEMY OF SCIENCES [Proc. 41TH Ser.
expect to go back to the same place tomorrow for the other
tortoise, and more if we find them.
March 19, 1906.—We went down the coast to the place
where we lost the boat. The tortoises come down to the
cactus trees about fifty to seventy-five yards from the bluffs,
and work around in the flat country near the coast. We found
three. Beck took two pictures of one of them. So far we
have brought all our Iguana Cove tortoises on board alive,
but I think we shall have to skin a large one tomorrow, and
put two over the cliffs into the sea and tow them to the ship.
King did not care to go with us today, our experience on
Saturday having been too much for him, so he went ashore at
Iguana Cove to hunt tortoises. He failed to find any signs
whatever. Hunter says he saw an old watering place about
seven hundred feet up the mountain, but the grass had grown
over all the trails, and there were no fresh signs of tortoises
anywhere. The tortoises taken have numerous blood-sucking
ticks along the cracks between the plastral plates.
March 20, 1906.—Went down the coast to get the tortoises
we have tied up. We put them all off into the sea and towed
them to the ship. Two of them were badly battered up by the
surf. We had to lower them over the cliffs with ropes and
let them drift out to the boat. Beck took several pictures of
the operation. It took up about the whole day. One of the
tortoises that came floating by on Sunday morning died the
night of the 19th of the injuries it had received. Its stomach
contained cactus and grass. We expect to sail tomorrow, as
the place is rather dangerous to anchor, and all hands will feel
safer out of here.
March 21, 1906.—Worked on board all day, skinning two
tortoises that died from injuries received in collecting them.
We sailed for Narborough at 10:30 a. M.
Vor. I, Pr. 1] VAN DENBURGH—GALAPAGOS TORTOISES 351
Testudo wallacei Rothschild
Jervis Island Tortoise
Plates 111 and 112.
Testudo wallacei Roruscuitp, Novit. Zool., IX, 1902, p. 619; HELLER,
Proc. Washington Acad. Sci., V, 1903, p. 54; SreBENRocK, Zool. Jahrb.,
Suppl. X, 3, 1909, p. 533.
Type specimen.—In the Rothschild Museum at Tring, Eng-
land. Carapace, probably of adult male. Straight length
32.25 inches. Purchased from the Bullock collection. Origin
unknown.
Distribution.—Jervis Island, Galapagos Archipelago.
Material.—Our collection includes the skin of one adult male
and some fragments of bone from another specimen.
Diagnosis——No nuchal; gulars paired; fourth cervical ver-
tebra biconvex; front of carapace moderately high in males,
but considerably lower than middle height; height at nuchal
notch less than 45% (37%) of straight length; difference
between percentages of heights at third vertebral and at nuchal
notch more than 13 (17); carapace not saddle-shaped, not
narrow anteriorly, width at margin of junction of second and
third marginals not less than 44% (54%) ; first marginals not
greatly enlarged, not everted, their ventral surfaces not verti-
cal; length over curve 134%, greater than width over curve
(129%) ; vertical distance from lower surface of plastron to
lower edge of lateral marginals great, 8% ; general size large,
straight length 36.2 inches; plastron moderately long, median
length 81% ; pectorals forming a suture on median line; eighth
marginal plate not reduced, with well-developed superior bor-
der; lower jaw and throat not marked with yellow.
September 30, 1914.
CALIFORNIA ACADEMY OF SCIENCES
TABLE OF MEASUREMENTS OF JERVIS ISLAND TORTOISE
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Vor. H, Pr. 1] VAN DENBURGH—GALAPAGOS TORTOISES 353
General remarks.—The single tortoise at hand from Jervis
Island is very similar in shape to the large males of Testudo
vicina from Iguana Cove. The length over the curve in the
Jervis Island tortoise is greater than in those from Iguana
Cove, so that the curved width is less than the curved length.
The front height is less than in T. darwini of James Island,
making the difference between front and middle heights
greater. Upon the whole it may be said that the Jervis tor-
toise is intermediate between those of James Island and Iguana
Cove, and that it seems to resemble the latter a little more
than the former. My reasons for using the name T. wallacei
for this tortoise are stated in the introductory portion of this
paper (see page Ne
Field Notes—December 18, 1905.—Left Duncan Island this
morning, and made Jervis early in the afternoon. Worked on
Duncan tortoises all day and got the mess straightened out as
well as possible. Expect to get ashore on Jervis tomorrow.
Gifford says he saw a lot of old tortoise trails and old drop-
pings. The island is very steep, and is composed of red-lava
blocks. The beach is all red-lava sand or dust, and trees in the
lagoon are visible from the ship.
December 19, 1905.—Went ashore on Jervis. A fine sand
beach with a lagoon back of it. The island is covered with
red-lava blocks and ashes. The highest peak is 1050 feet by
barometer. I saw old tortoise trails in the ashes, one of which
ran up a valley clear to the top. Saw lots of old dung that
apparently had been rained on, as it was bleached out rather
white.
December 20, 1905.—Mr. Beck went ashore on Jervis and
found a large tortoise on the north side in a small valley. It
looks like the south Albemarle ones.
354 CALIFORNIA ACADEMY OF SCIENCES [Proc. 41TH Ser.
Testudo porteri Rothschild
Indefatigable Island Tortoise.
Plates 113 to 121.
? Testudo indica (part), Gray, [nec Perrault, 1676] Syn. Rept., 1831,
p. 9; Gray, Cat. Tort. Croc. Amphis. Brit. Mus., 1844, p. 5; Gray, Cat.
Shield Rept. Brit. Mus., I, 1855, p. 6; Gray, Suppl. Cat. Shield Rept. Brit.
Mus., 1870, p. 5; SowErsy & Lear, Tortoises, 1872, pl. VI.
? Testudo nigrita, Dum. & Bisr., Erpét. Génér., II, 1835, p. 80; GUN-
THER, Trans. Royal Soc. Lond., CLXV, 1875, p. 267, pls. 33 fig. B, 35 fig. C,
37 fig. D, 38 fig. D, 39 fig. D; GUNTHER, Gigantic Land Tortoises Brit.
Mus., 1877, p. 69, pls. XXX fig. B, XXXIB fig. C., XLII fig. D,
XLII fig. D, XLIV fig. D; BouLencrr, Cat. Chelonians Brit. Mus., 1889,
p. 169; KAmMeEreEr, Blatt. Aquar.—Terr—Kunde, XIX, 1898, p. 737, figs.
1-2 [T. vicina?]; Wartr, Rec. Austral Mus., III, 1891, p. 95; HEtieEr, Proc.
Washington Acad. V, 1903, p. 53; SrEBENROcK, Zool. Jahrb., Suppl. X, 3,
1909, p. 531.
? Testudo planiceps, Gray, Cat. Shield Rept. Brit. Mus, 1855, p. 6, pl.
XXXIV; Gray, Suppl. Cat. Shield Rept. Brit. Mus., 1870, p. 5; Elephan-
topus planiceps, Gray, Proc. Zool. Soc. Lond., 1873, p. 724.
? Testudo elephantina, Straucu, [nec Duméril & Bibron] Mém. Ac.
St. Petersb., (7), V, No. 7, 1862, p. 83.
? Testudo elephantopus, Gray, [nec Harlan] Proc. Zool. Soc. Lond.,
1870, p. 708, pl. XII, (part); Gray, Append. Cat. Shield Rept. Brit. Mus.,
1872, p. 3.
Testudo porteri Roruscuitp, Novit. Zool., X, 1903, p. 119; S1EBEN-
rock, Zool. Jahrb., Suppl. X, 3, 1909, p. 532.
Type specimens.—Testudo nigrita: Paris Museum. Very
young. Origin unknown. And Museum Royal College of
Surgeons, London. Young. Straight length 22 inches. Origin
unknown.
Testudo planiceps: British Museum. Skull of adult. Origin
unknown.
Testudo porteri: Tring Museum, England. Adult. Curved
length 51.5 inches. Taken on Indefatigable Island, by R. H.
Beck.
Distribution.—Indefatigable Island, Galapagos Archipelago.
Material—In the Tring Museum are two adult males, two
adult females, one young, and six skulls. The species also is
represented in the collection in Vienna. The California Acad-
emy has twenty-three of both sexes and various sizes.
Diagnosis —No nuchal; gulars paired; fourth cervical ver-
tebra biconvex; front of carapace low, from 18 to 28% lower
than middle; height at nuchal notch not more than 40% (30
Vor. II, Pr. I] VAN DENBURGH—GALAPAGOS TORTOISES 355
to 40%) of straight length; difference between percentages
of heights at third vertebral and at nuchal notch more than
17 (18 to 28) ; carapace dome-shaped, very broad anteriorly,
width at margin of junction of second and third marginals
not less than 53% (53 to 71%); first marginals not everted,
their most prominent points separated by less than 25% (18
to 24%); length over curve not less than 125% (126 to
141%), usually greater than width over curve; vertical dis-
tance from lower surface of plastron to lower edge of lateral
marginals great, 7 to 11%; general size large, straight length
to 41.4 inches; plastron long, 77 to 92%; plates generally
striated; pectorals forming a suture on median line; eighth
marginal plate not reduced, with a considerable superior bor-
der ; lower jaw and throat in males not marked with yellow.
[Proc. 4rH Ser.
CALIFORNIA ACADEMY OF SCIENCES
356
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Vor. II, Pr. I] VAN DENBURGH—GALAPAGOS TORTOISES 357
General remarks.—Testudo porteri seems to be still fairly
common. It is a very large species with thick, heavy shell.
The large males are rounder and more dome-shaped than
those of any other locality. Some of the half-grown females
can only with great difficulty be distinguished from southern
Albemarle specimens. If one may judge from the condition
of the bones, the largest specimens in our collection are still
quite young, in fact none of our Indefatigable tortoises ap-
pears to be of great age. It is probable that they grow rap-
idly when in their native haunts, although our smallest speci-
men grew less than an inch and a half in length in six years
of life in San Francisco.
Nine eggs (No. 8421) taken from a nest found on Inde-
fatigable October 25, 1905, measure 2.50x2.20, 2.45x2.30,
ZAAFXZ. 24, 2.39x2.30, 2:35x2:24, 2:30x2:25;, 2:25x2.25,, 2:25x
2.20 and 2.23x2.22 inches.
Field Notes.—Oct. 25, 1905, went ashore on Indefatigable
to look for tortoises at the same place where Beck found them
before, and hunted all day. Early in the morning, soon after
our arrival at the hunting grounds, we found one small
female. We then scattered, everybody following different
trails. The trails are from three to five feet wide. At inter-
vals the ground may be seen dug up, like a wallow. No fresh
droppings were seen, but lots of old ones along the trails. I
saw several apparently fresh wallows, but no tortoises. At
two o'clock, we all met at the place we found the first tortoise
and started back for the ship, King and Hunter carrying the
tortoise. Beck, Williams and myself went a little to the
north, and soon fell upon a fresh track. We followed this for
about ten minutes, and soon came upon a big male tortoise
walking slowly through the brush. While looking at our
prize, we heard a noise in the brush at one side, and, turning
around, saw a large female heading the way we had just come.
We killed the female, and turning the male on his back, tied
his feet to a tree, as it was too late to do more. The female
had eggs in the ovaries at different stages of development—
some already with hard shells and some in yolk. Some va-
cant spaces were seen from which the eggs had already been
laid. We found a nest on one of the trails, and Beck dug it
out, finding ten eggs. The nests look like a little round space
358 CALIFORNIA ACADEMY OF SCIENCES [Proc. 4TH Ser.
scraped clean of brush and leaves. The top is hard earth, but,
on digging down the earth gets softer, and a small hole is
found about seven or eight inches in diameter, and thirteen
inches deep. This is the nest proper and contains the eggs
buried in loose soil. Beck found one more set earlier in the
day. We brought both sets back to the ship, and shall try to
blow them. Shall also try to save those taken from the
female captured. Beck found part of the skull of a tortoise
he killed when here before. Also saw bones of one he killed
on that trip. We are going in tomorrow to try to get out
the two other tortoises.
Oct. 26, 1905.—Went in after the tortoises found yester-
day. The big male had broken loose from the lashings, but
was only about twenty yards away. We started work skin-
ning at once; the mate, Ochsner, King, and myself on the big
fellow, with Hunter and Williams on the smaller one. Beck
went around looking for more, but failed to find any. How-
ever, he reported having seen a fresh trail of a little one,
about seven or eight inches wide. At about half past three
we started down toward the coast with the tortoises, having re-
moved all the heavy meat from them, and arrived at the
vessel at about half past five. The eggs taken from the
female were left behind, as we had too much to carry. To-
morrow I suppose we shall clean out the tortoises ready for
pickle, and also skin the one brought down yesterday.
Oct. 27, 1905.—Stayed on board all day skinning tortoises.
got the two females in pickle, and the big male nearly ready.
Beck went inland again, and found two more tortoises—one
a fair-sized female and one little tortoise about nine and one-
half inches long. King and Williams will go in for the large
one tomorrow. I hope tomorrow to get the large male into
pickle, and try to blow some eggs.
Oct. 28, 1905.—Went ashore with Williams, and carried
out the other tortoise. King finished the large male and
blew the eggs. Got embryos out of the eggs from one of the
nests. Beck searched all day for tortoises, but failed to find
any, or any traces outside of the grounds where we found the
others. Will sail tomorrow for South Albemarle.
Nov. 6, 1905.—Beck went ashore with Ochsner, Stewart,
and Williams, to cut or find a trail leading into the interior,
Vou. Il, Pr. I] VAN DENBURGH—GALAPAGOS TORTOISES 359
and to look for tortoises. Beck found a large female, and
killed it. We are going in tomorrow to skin this tortoise.
Williams and King will bring it back and Beck and I will
camp over night.
Nov. 7, 1905.—Went into the tortoise belt with Beck, pre-
pared to camp for a few days. After hunting all day we
found three tortoises, tied them up and returned to camp.
One was a large male, and the other two were females. The
large male was grazing along in the grass when found, as a
cow or a horse might do. It appeared to be perfectly deaf, as
it took no notice whatever of us when we went up to it and
yelled; but as soon as it saw us it drew in its head with a loud
hiss. The tortoise belt is two hundred feet in elevation by
barometer, and is filled with cactus and brush together with a
number of large trees.
Noy. 8, 1905.—Started out from camp early in the morn-
ing. I began skinning a female taken yesterday, while Beck
went hunting for more, and made a trail up the mountain.
He returned in the evening and we went back to camp.
Nov. 9, 1905.—Started out from camp, and by noon had
finished the female I worked on yesterday. Hunter and King
came up today and we three started for the coast with the two
tortoises. Beck stayed in camp and found another tortoise
in the afternoon. He also struck the trail of a large one,
which he came up with toward evening. He killed this one,
and returned to camp.
Nov. 10, 1905.—Went back to camp again with Ochsner,
Hunter and King. Ochsner and King finished skinning a
small female, and took it down to the coast. Hunter, Beck
and myself went to the big male found yesterday, and par-
tially skinned him so that he could be taken out next day.
We returned to the ship by dark.
Nov. 11, 1905.—Stayed on board all day and prepared
tortoises. Blew some eggs and straightened things up in
general. Beck and the rest of the party went in after the big
tortoise. Beck took some pictures of the party carrying the
tortoise down a cliff which has to be climbed in order to
reach the interior.
Nov. 12, 1905.—All hands resting.
360 CALIFORNIA ACADEMY OF SCIENCES [Proc. 41H Ser.
Nov. 13, 1905.—Went in to the camp again, and skinned
the large male that we left tied up to a tree. Beck searched
for more tortoises and found three farther inland. We re-
turned and camped all night at the old place.
Noy. 14, 1905.—Finished skinning the large male and one
female which Beck found yesterday. Hunter and Stewart
took out the male, while King and I took out the female. On
the way down Williams and Gifford overtook us, and said
they had killed a small tortoise up the trail just outside the
cactus belt. Williams and I will go after it tomorrow, while
the rest help Beck with the other two tortoises.
Nov. 15, 1905.—Went up the trail with Williams after
the tortoise found yesterday. He was about half a mile
beyond the cactus belt, and when found was crossing the trail,
going around the base of the mountain. His stomach con-
tained grass and weeds. Beck, Ochsner, and Stewart brought
out the big male, so there is one small tortoise left to carry
down.
Noy. 16, 1905.—Stayed on board all day and finished
cleaning the tortoises brought down. Have all the tortoises
pickled now except some of the Albemarle ones, which are
living in the tortoise pen. Expect to sail in the morning for
Gordon Rocks and anchor there, so that Mr. Beck and party
can try to reach the top of the mountain.
Noy. 17, 1905.—Sailed for Gordon Rocks and anchored
about five o’clock in a cove on the northwest side of Inde-
fatigable Island. The country here is a slightly elevated
plateau and very open, there being a few cacti and scattered
brush.
Jan. 11, 1906.—Were becalmed off the coast southwest of
Puerta de l’Aguada, and anchored with the kedge. Beck and
Hunter went ashore while I held the boat. Hunter found the
skeletons of two small tortoises which appeared to have been
killed by natives. No skulls were found.
Jan. 12, 1906.—Spent most of the day watering ship.
Jan. 13, 1906.—Worked on tortoises all day. Beck went
ashore and found one large male and a female.
Jan. 14, 1906.—All hands resting.
Jan. 15, 1906.—Beck, King, and myself went into the in-
terior, and skinned and carried out the female tortoise found
Vor. II, Pr. 1] VAN DENBURGH—GALAPAGOS TORTOISES 361
Saturday. This tortoise was very fat with large light-
colored liver, just the opposite to those found on Duncan.
This probably is on account of the difference in food, those
on this island getting more green food, while the Duncan
tortoises get dry grass and lichen also. We are going in to-
morrow for the large male. The female had very few eggs
in the ovaries, all in yolk form.
Jan. 16, 1906.—kKing, Beck, and myself went into the in-
terior and brought out the big tortoise found on Saturday, the
13th. This tortoise had more fat than any other male taken
thus far. As a rule they do not have nearly so much as the
females.
Jan. 17, 1906.—King, Beck, and myself went in again
after tortoises. Found three, but one got away. Skinned a
small female, and brought her down to the ship. We are
going in after another female that is tied up. King found the
big male that got away.
Jan. 18, 1906.—Went in again after tortoises, and skinned
and carried out a male tortoise found yesterday. Beck found
another female today, and also the big male that got away.
We now have two females and a large male tied up, and are
going in tomorrow with all hands to get the two females. The
tortoise skinned today was found eating cactus, and its stom-
ach was full. The bladder was full of water. Lots of cactus
spines were stuck in the throat. All the tortoises taken during
this visit here were found about three and one-half miles
inland.
Jan. 19, 1906.—Went in after the two female tortoises
which had been left tied up. We find the females have much
larger livers than the males. One of the tortoises taken today
is about the largest female we have found.
Jan. 20, 1906.—Went in and brought out the tortoise
which escaped from us on the 17th. He had traveled about
two miles in an afternoon. He was fairly fat for a male, and
had a stub tail, probably due to some accident when small.
July 11, 1906.—Sailed for Puerta de Aguada and an-
chored at eleven in the morning.
July 12, 1906.—Went in after a tortoise with King and
Beck. In the same country where we had hunted before we
found numerous trails and signs of tortoises. We ran across
362 CALIFORNIA ACADEMY OF SCIENCES [Proc. 4TH Ser.
a good-sized male early in the morning, and skinned and
brought him out. His stomach contained cactus.
July 20, 1906.—At anchor at a little cove near Conway
Bay where the trail that led up to the old settlement com-
menced.
July 24, 1906.—Went ashore for a couple of hours in the
morning and got a mess of doves for food. The country here
is covered with dry grass and small trees. I saw no reptiles
of any description. We sailed for Daphne Island at about
nine o'clock.
Testudo species?
Cowley Mountain Tortoise.
Plates 122 and 123.
Distribution.—Cowley Mountain, Albemarle Island, Gala-
pagos Archipelago.
Material—The Academy collection includes only one skin
with bones of a female, and a few fragments of other indi-
viduals.
Diagnosis—No nuchal; gulars paired; fourth cervical ver-
tebra biconvex; front of carapace low; height at nuchal
notch 36% of straight length; difference between percentages
of front and middle heights 25; carapace dome-shaped, broad
anteriorly, width at margin of junction of second and third
marginals 54%; first marginals not greatly enlarged, not
everted; their ventral surfaces not vertical, their most promi-
nent points separated by less than 25% (17%); length over
curve more than 123% (128%); width over curve greater
than length over curve; vertical distance from lower surface
of plastron to lower edge of lateral marginals great, 10%;
general size moderate, straight length 26.75 inches; plastron
moderately long, 85%; plates striated; pectorals forming a
suture on median line; eighth marginal plate not reduced;
lower jaw and throat of female black.
Mor. Ul PTs 01)
VAN DENBURGH—GALAPAGOS TORTOISES
TABLE OF MEASUREMENTS OF COWLEY MOUNTAIN TORTOISE.
quay 19g
LBL
HOON
qUeH 19g
MOGI OF BILEXV
yuag 19g
quay puLHy
quay 190g
qury e105
quep tag
u0L}88
sy vuLsaRUL
0} 1qS10H
“4uay Jed |
quoi
Height
quay tag |
SIPPIW
quag r8q
S[RULSIBOL pE
07 PS WIPIM
4uaQ 19g
WIPIM
Curved
quap 19g
yysue'y
qua Jed |
WIPIM
Straight
8512.8 4813.2 497.2 27
138144 5416.25 61 | 9.5 36 2.7 10 22.9
8434.5 128 37.
22.5
26.75
requny
8141
363
364 CALIFORNIA ACADEMY OF SCIENCES [Proc. 41H Ser.
General remarks.—This tortoise is most closely related to
T. porteri of Indefatigable Island and T. vicina of the south-
ern part of Albemarle Island. It is more nearly circular in
outline than any other tortoise. Its high dome-shaped back
makes it resemble 7. porteri very closely, but it is more like
the dome-shaped females of 7. vicina in its curved length, and
in its width at second and third marginal suture. The differ-
ence between the front and middle heights is greater than in
any specimen of 7. vicina. The width at suture between sec-
ond and third marginals is less than in most of my specimens
of T. porteri; as is also the curved length. The female taken
had well developed ovaries containing large yolks. With only
a single female specimen of this tortoise for comparison, it is
quite impossible to be certain as to whether it really represents
a distinct race. It, therefore, seems best to leave it without a
specific name until male specimens have been secured.
Field Notes.—Aug. 9, 1906.—Sailed from James Bay for
Cowley Mountain, Albemarle, and anchored off the moun-
tain at about six in the evening.
Aug. 10-11, 1906.—Went in after tortoises. Cowley
Mountain on this eastern side is a vast stretch of pumice
stone with practically no vegetation for some miles inland.
It rises with a gradual slope for about five miles, then gets
quite steep at the elevation of about two thousand feet, where
the vegetation becomes thick—small trees covered with moss,
and tall dry grass tramped down in most places by the mules,
being met with. At about 2200-2500 feet, a level area about a
mile and a half in width surrounds the rim of the volcano. The
mules do not get into this area because of a tall grass, growing
higher than one’s head, which it is almost impossible to push
through. We had a good look at the rim of the crater but could
not get through to it, so, turning back, we camped for the night
near the edge of this belt. We searched for tortoises next morn-
ing in the dry grass below, and found signs about a month old,
but did not see any tortoises. The trails ran into the mule
trails, which made it impossible to track them. Beck came
down the mountain where we were looking, and ran across a
tortoise a little farther up the hill. He had been over to the
southward, and found it a little better going, so that he got
closer to the crater. He found the camp where the natives
Vor. H, Pr. I] VAN DENBURGH—GALAPAGOS TORTOISES 365
killed the tortoises, and saw about seventy old skeletons. We
saw a few to the northward. It is a capital place to use mules,
and, no doubt, the natives cleaned the tortoises out very thor-
oughly here. Beck skinned the tortoise out roughly, and
King and I finished it on Sunday.
Testudo species?
Barrington Island Tortoise.
Plates 123 and 124.
Nothing has been known of the presence of tortoises on
Barrington Island. None of the early navigators mentions
having seen them there, and no recent visitor to the archi-
pelago has made note of them. Our expedition secured evi-
dence that tortoises formerly were fairly abundant on this
island. Fragmentary remains of some fourteen individuals
were found. These are mostly very old bones—pelves,
femora, humeri, etc.—and leave us completely ignorant of the
shape and relationship of the tortoises of Barrington Island.
A few of these bones are figured in the plate given. Two very
old semi-fossil eggs also were found, one of which is shown,
photographed together with eggs from Albemarle, Duncan,
and Indefatigable islands, in Plate 124. These eggs are
larger than any that I have seen from other islands. They
(No. 8424) measure 2.55x2.25 and 2.50x2.40 inches. Some
of the bones evidently came from very large tortoises, while
some with well-united sutures are quite small. It would thus
appear that the tortoises of Barrington Island varied consid-
erably in size.
Field Notes.—Feb. 22, 1906.—We met the schooner from
Guayaquil, and saw the Captain, who is an Englishman. He
says he has taken tortoises on Chatham, and says he ate the
last one on the island some twenty years ago. He also reports
having taken them off Barrington Island about fifteen years
ago, but that they are now extinct. None of our party saw
any remains while staying there. He got tortoises from Hood
some years ago, probably before 1897. There was an Albe-
marle tortoise tied up at the wharf, and the Captain says the
tortoise changes his shell completely, but he doesn’t know
how often! This one had a plate on the carapace loose.
366 CALIFORNIA ACADEMY OF SCIENCES [Proc. 41TH Ser.
July 9, 1906.—Sailed for Barrington Island about 5 A. M.
and arrived at 11 a. M. Captain Levick, of the schooner that
runs between the islands, informed us that thirty years ago
tortoises were found scattered all over Barrington, and that
he had taken them off that island. He doubted very much
whether we would find any as, he says, they were all killed
off long ago. We landed after dinner and proceeded on a tor-
toise hunt. For lack of time, we could not go far or cover
much ground, but we had good luck. Beck found some old
bones, and Mr. Nelson, the mate, found two old eggs on the
north side of the island. He said they were near an iguana’s
hole, whence they had been dug out and were lying on the
ground. They appear to be not more than a year old. We
are going in again tomorrow. Mr. Nelson says he will try to
find the spot again where hé took the eggs, and we will dig
down and see if any more can be found. He was in too much
of a hurry to look, as it was nearly dark and he was heading
for the boat at full speed.
July 10, 1906.—Made another search for tortoises, but
found no live ones. Beck found some more bones on the
higher portions of the north end of the island. He mentions
having seen a very old piece of dung yesterday. Mr. Nelson
tried to find the place where he found the old eggs, but failed
to do so. We have come to the conclusion that the eggs prob-
ably are more than a year old, and were lately dug up by
iguanas and exposed to the sun. King and I visited the valleys
on the north coast, but found no signs whatever of tortoises.
GENERAL CONCLUSIONS.
The various races of tortoises of the Galapagos Islands
differ from one another chiefly in shape. There are no real
differences in structure, such as are found in the lizards and
snakes of the archipelago. The relative values which should
be attached to these differences in shape are extremely dif-
ficult to estimate. Therefore the tortoises do not throw much
light upon the history and development of the archipelago.
Some points, however, are of considerable interest.
Tortoises either live, or are known to have lived, upon
Abingdon, Chatham, Hood, Charles, Barrington, Indefatiga-
Vou. II, Pr. I] VAN DENBURGH—GALAPAGOS TORTOISES 367
ble, James, Jervis, Duncan, Narborough, and Albemarle
islands. The last named island supports several races of tor-
toises. The tortoises of Barrington are practically unknown.
Each of the other nine islands had its own peculiar race of
tortoise, and on none of these nine islands has evidence of more
than one race been found. This lends particular interest to
the fact that several races of tortoises occur on Albemarle
Island.
Although these tortoises can live for at least several days
floating on the surface of the ocean, they are absolutely help-
less in the water. They are unable to swim, and can only
float and drift at the mercy of the winds and currents. When
they drift on island shores, they usually are so battered and
injured on the rocks that they only live a few days there-
after. The fact that each island, except Albemarle, has one
and only one race of tortoise, is evidence that interchange of
tortoises between the islands has not occurred, for such inter-
change would result either in preventing differentiation or in
the presence of more than one race on an island.
If the transportation of tortoises from one island to another
does not occur, there is little reason to believe that tortoises,
at some time in the past, have drifted over the vastly greater
distance from some continent, and have reached each of the
eleven islands on which they have been found. Nor do we
know whence they could have come. The evidence offered by
these tortoises, therefore, seems to be against the view that
these are oceanic islands, which have been independently
thrust above the surface of the water, and have received such
animals as have drifted to them. We must rather adopt the
view that the islands are but the remains of a larger land-
mass which formerly occupied this region, and was inhabited
by tortoises, probably of but one race; that the gradual partial
submersion of this land separated its higher portions into vari-
ous islands; and that the resulting isolation of the tortoises
upon these islands has permitted their differentiation into dis-
tinct races or species.
If isolation plays so prominent a part in the differentia-
tion of species in the Galapagos Archipelago, and each island
has its one distinct race, what is the explanation of the fact
that on Albemarle Island five distinct races of tortoises occur ?
September 30, 1914.
368 CALIFORNIA ACADEMY OF SCIENCES [Proc. 41TH Ser.
The fact that each of the five great mountains of Albemarle
seems to have been the original home of one of these five races,
suggests that these volcanoes formerly were separated by
water and formed five islands. These five islands must have
remained separate long enough to permit the development of
the differences which distinguish the five kinds of tortoises
now found upon Albemarle. ‘Then these five small islands
must have been elevated until they merged to form the present
Albemarle Island.
If there has been such an elevation of Albemarle Island in
recent times, we might hope to find some record of it in the
rocks, either in the form of fossils or of elevated beaches. Mr.
Ochsner, the geologist of our expedition, found such evidence ;
but, since his results have not yet been published, I shall con-
tent myself by calling attention merely to Heller’s statement:
“Near Iguana Cove, Albemarle, there are several old
sea-cliffs now situated a considerable distance inland. At
Tagus Cove on the same island a series of terraces, still con-
taining the characteristic cavities made by sea-urchins, are
now several hundred feet above the present sea-level.”
This is positive proof of the recent elevation of Albemarle
Island, and favors our explanation of the presence of several
species of tortoises upon this island.
Our studies of the reptiles of the Galapagos Archipelago,
therefore, all point to the conclusion that these are not oceanic
islands. We must regard the present islands as made up of
the higher portions of a much more extensive land-mass which
formerly existed in this region. This Galapagos Land was
the home, probably, of one race of giant tortoises, of one kind
of gecko, of one species of Tropidurus, of two kinds of
iguanas, and of two species of snakes. Gradual depression
resulted in the submersion of much of this Galapagos Land.
As the lower portions were covered by water the higher parts
became, at intervals, separate islands, inhabited, after isolation,
by the same kinds of reptiles which had occupied them before.
Variation through a long period of time produced specific and
sub-specific changes in these isolated colonies of reptiles, until
each island upon which tortoises remained sustained its own
peculiar kind. Similarly, the snakes, the gecko, and the
Tropidurus, of various islands became differentiated. Since
Vor. Il, Pr. I] VAN DENBURGH—GALAPAGOS TORTOISES 369
this differentiation varies in degree on the various islands—
being greatest usually on the more out-lying islands—it may
be regarded as an index to the order of separation of the
various islands, and evidence of their gradual depression. Only
on Albemarle Island do the reptiles suggest that there has been
land elevation, and even here the recent period of rising must
have been preceded by a long period of depression, during
which the present Albemarle Island was represented, prob-
ably, by five separate islands corresponding to its five great
volcanoes.
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Suppl. X, Heft 3, pp. 427-618.
INDEX
(Synonyms in tfalics; new names in black face type.)
Abingdon Island Tortoise, 296
abingdoni, Testudo, 296
abingdonii, Testudo, 296
Adams, C. F., 228
Agassiz, Professor A., 228
Professor Louis, 226
Atahualpa, 209
Barrington Island Tortoise, 365
Baur, Dr. George, 210
Beck, R. H., 242
becki, Testudo, 303
bedsi, Testudo, 303
Berlanga, Fray Tomas de, 209
Bibliography, 369
Bibron, M., 223
Brown, Dr. Arthur E., 247
Bynoe, Mr., 222, 225
californiana, Testudo, 245, 316
Charles Island Tortoise, 316
Charts showing variation, 289
chathamensis, Testudo, 323
Chatham Island Tortoise, 323
Clipperton, 211
Cochrane, Rear Admiral, 226
Colnett, Captain James, 212
Conclusions, General, 366
Contents, 203
Cooke, 210
Cookson, Commander, 226, 228
Cowley, 210
Cowley Mountain Tortoise, 362
Dampier, 210
Darwin, Charles, 220, 235
darwini, Testudo, 319
Davis, Edward, 210
de Beauchesne, Captain, 211
de Freycinet, M., 244, 316
de Jeude, Van Lidth, 291
Delano, Amasa, 212
Description, 259
Descriptions of the Races, 295
Downes, Commodore John, 220, 255
Drowne, F. P., 228, 229
Dumeéril and Bibron, 249
Duncan Island Tortoise, 306
elephantina, Testudo, 354
elephantopus, Testudo, 245, 316
ephippium, Testudo, 251, 306
Evans, Whitton, 245, 246
Expedition to the Galapagos Islands, 203
Fitzroy, Admiral, 228
Fray Tomas de Berlanga, 209
Gadow, Hans, 257
gadowi, Testudo, 257
galapagoensis, Testudo, 255, 316
Galapagos Archipelago, Gigantic Land
Tortoises of the, 203
Galapagos Islands, Expedition to the, 203
General Conclusion, 366
Gifford, E. W., 242
Gigantic Land Tortoises of the Gala-
pagos Archipelago, 203
Gray, M., 223
Giinther, Dr. Albert, 245, 249, 251, 252
guntheri, Testudo, 256, 335
Habel, Dr., 226
Hall, Captain Basil, 219, 251
Harlan, Dr. Richard, 245
Harris, 210
Harris, C. M., 228
Heller, Edmund, 234
Hernandez, Colonel, 220
hoodensis, Testudo, 313
Hood Island Tortoise, 313
Hull, G. D., 228
Hunter, J. S., 242
Indefatigable Island Tortoise, 354
indica, Testudo, 316, 354
Iguana Cove Tortoise, 344
Introduction, 206
Jackson, Dr. J. B., 255
Jahnke, Herman, 231
James Island Tortoise, 319
Jervis Island Tortoise, 351
Key to Galapagoan Races, 293
Kinberg, Dr., 226
King, E. S., 242
Knight, 210
Land Tortoises of the Galapagos Archi-
pelago, Gigantic, 203
Lawson, Mr., 222, 223
Levick, Captain, 366
Linbridge, Captain, 228
Measurements of Abingdon Island Tor-
toises, 297
Measurements of Bank’s Bay Tor-
toises, 304
Measurements of Cape Rose Tortoises,
331
Measurements of Chatham Island Tor-
toises, 324
Measurements of Cowley Mountain Tor-
toise, 363
Measurements of Duncan Island Tor-
toise, 307, 308, 309
Measurements of Hood Island Tortoises,
314
Measurements of Iguana Cove Tortoises,
345
Measurements of Indefatigable Island
Tortoises, 356
Measurements of James Island Tortoises,
320:
Measurements of Jervis Island Tortoise,
352
INDEX
Measurements of Narborough Island
Tortoises, 300:
Measurements of Old Cobos Settlement
Tortoises, 345
Measurements of South Albemarle Tor-
toises, 337, 346, 347
Measurements of Tagus Cove Tor-
toises, 330
Measurements of Vilamil Tortoises, 336
Meek, Captain, 244, 316
microphyes, Testudo, 252, 329
Morrell, Captain Benjamin, 219
Narborough Island Tortoise, 299
Nelson, Mr., 366
nigra, Testudo, 244, 316
nigrita, Testudo, 249
Nomenclature, 244
North Albemarle Island Tortoise, 303
Noyes, Captain, 237
Ochsner, W. H., 242
Osteological differences, 292
phantastica, Testudo, 299
planiceps, Testudo, 251, 354
Plates, 373
Porter, Captain, 215
porteri, Testudo, 354
Quoy and Gaimard, 244
Rogers, Woodes, 211
Rothschild, Walter, 228, 313
Seemann, B., 226
Slevin, J. R., 242
Snodgrass, Robert E., 234
Stewart, Alban, 242
Stone, Witmer, 247
Systematic Account, 244
Table of Measurements of Tortoises,
287, 288
Tagus Cove Tortoise, 329
Testudo abingdoni, 296
becki, 303
bedst, 303
californiana, 245, 316
chathamensis, 323
darwini, 319
elephantina, 354
elephantopus, 245, 316
ephippium, 251, 306
gadowi, 257
galapagoensis, 255, 316
guntheri, 256, 335
hoodensis, 313
indica, 316, 354
microphyes, 252, 329
nigra, 244, 316
nigrita, 249
phantastica, 299
planiceps, 251, 354
porteri, 354
species ?, 362, 365
vicina, 253, 344
wallacei, 257, 351
Tortoises of the Galapagos Archipelago,
Gigantic Land, 203
Traquair, Dr., 251, 252
Tupac Yupangi, 209
Vancouver, 211
Van Denburgh, John, 203
Variation with age, 289
distribution, 290
individual, 291
sex, 289
vicina, Testudo, 253, 344
Vilamil, J., 219, 220
Vilamil Mountain Tortoise, 335
Wafer, 210
wallacei, Testudo, 257, 351
Watkins, Patrick, 219
Webster, Frank B., 228, 237
Williams F. X., 242
Wood and Rogers, 226
PROC. CAL. ACAD. SCI. 4th Series Vol. Il Pt. | (VAN DENBURGH] Plate 24
PID
Fig. 1. Testudo abingdoni Gunther.
Abingdon Island. 36 inch male. From above.
2. Testudo abingdoni Gunther.
Fig.
Abingdon Island. 36 inch male. From side
‘
.
.
PROC. CAL. ACAD. SCI. 4th Series Vol. I] Pt. | {VAN DENBURGH] Plate 2
Fig. 1. Testudo abingdoni Gunther.
Abingdon Island. 36 inch male. From in front.
Fig. 2. Testudo abingdoni Gunther.
Abingdon Island. 35 inch male. From above.
PROC. CAL. ACAD. SCI. 4th Series Vol. II Pt. | [VAN DENBURGH] Plate 26
|
Fig. 1. Testudo akingdoni Gunther.
Abingdon Island. 35 inch male. From side.
Fig. 2. Testudo abingdoni Gunther.
Abingdon Island. 35 inch male. From in front.
PROC. CAL. ACAD. SCI. 4th Series Vol. II Pt. | [VAN DENBURGH] Plate 27
Fig. 1. Testudo abingdoni Gunther.
Abingdon Island. 32 inch male. From side.
Fig. 2. Testudo abingdoni Giinther.
Abingdon Island. 29.3 inch bony carapace. From above.
PROC. CAL. ACAD. SCI. 4th Series Vol. II Pt. | (VAN DENBURGH] Plate 28
Fie. 1. Testudo abingdoni Gunther.
Abingdon Island. 29.3 inch bony carapace. From side,
Fig. 2:
Abingdon Island. 29.3 inch bony carapace. From in front
Testudo abingdoni Gunther
PROC. CAL. ACAD. SCI. 4th Series Vol. II Pt. | VAN DENBURGH] Plate 29
Fig. 1. Testudo abingdoni Gunther.
Q 5 a.
Abingdon Island. 29.3 inch bony carapace. from below
Fig. 2. Testudo abingdoni Gunther.
Island. 29.3 inch bony carapace. From behind.
Abingdon
PROC. CAL. ACAD. SCI. 4th Series Vol. II Pt. | [VAN DENBURGH] Plate 30
Fig. 1. Testudo phantastica Van Denburgh.
Narborough Island. 34.5 inch male. From above.
Fig. 2, Testudo phantastica Van Denburgh.
Narborough Island. 34.5 inch male. From side
PROC. CAL. ACAD. SCI. 4th Series Vol. Il Pt. | VAN DENBURGH] Plate 31
Fig. 1. Testudo phantastica Van Denburgh
Narborough Island. 34.5 inch male. From in front.
2. Testudo becki Rothschild
Fig
Bank’s Bay, Albemarle Island. 37.3 inch male. From above
PROC. CAL. ACAD. SCI. 4th Series Vol. II Pt. | [VAN DENBURGH] Plate 32
Fig. 1. ‘Testudo becki Rothschild.
Bank’s Bay, Albemarle Island. 37.3 inch male. From. side.
Fig. 2. Testudo becki Rothschild.
Bank's Bay, Albemarle Island. 37.3 inch male. From in front.
PROC. CAL. ACAD. SCI. 4th Series Vol. I] Pt. | [VAN DENBURGH] Plate 33
Iie. 1. Testudo becki Rothschild.
Bank's Bay, Albemarle Island. 34.25 inch male. From above.
2. Testudo becki Rothschild.
Fig.
Bank’s Bay, Albemarle Island. 34.25 inch male. From side
PROC. CAL. ACAD. SCI. 4th Series Vol. I] Pt. | [VAN DENBURGH] Plate 34
Fig. 1. Testudo becki Rothschild.
Bank’s Bay, Albemarle Island. 34.25 inch male. From in front.
Fig. 2. Testudo becki Rothschild.
Bank’s Bay, Albemarle Island. 34 inch male. From above.
4
75
PROC. CAL. ACAD. SCI. 4th Series Vol. II Pt. | [VAN DENBURGH}] Plate 35
Fig. 1. Testudo becki Rothschild
Bank's Bay, Albemarle Island. 34 inch male. I‘rom side.
Fig. 2. Testudo becki Rothschild
Bank's Bay, Albemarle Island. 34 inch male. From in front
PROC. CAL. ACAD. SCI. 4th Series Vol. Il Pt. | (VAN DENBURGH] Plate 36
Fig. 1. Testudo becki Rothschild.
Bank’s Bay, Albemarle Island. 41.5 inch male. From above.
Fig. 2, Testudo becki Rothschild.
Bank’s Bay, Albemarle Island. 41.5 inch male. From side.
PROC. CAL. ACAD. SCI. 4th Series Vol. II Pt. | [VAN DENBURGH] Plate 37
Fig. 1. Testudo becki Rothschild
Jank’s Bay, Albemarle Island, 41.5 inch male. From in front.
Fig. 2. Testudo becki Rothschild
Bank’s Bay, Albemarle Island. 21.75 inch adult female. From above
PROC. CAL. ACAD. SCI. 4th Series Vol. Il Pt. | VAN DENBURGH te 38
Fie 1 Testudo becki Rothschild.
Bank's Bay, Albemarle Island. 21.75 inch adult female. From side
Fig. 2. Testudo becki Rothschild
Bank’s Bay, Albemarle Island. 21.75 inch adult female. From in front
PROC. CAL. ACAD. SCI. 4th Series Vol. II Pt. | VAN DENBURGH] Plate 39
lig. 1. Testudo ephippium Gunther
Dunean Island. 29.5 inch male. From above
Fig. 2. Testudo ephippium Gunther
Duncan Island. 29.5 inch male. From side
oy
a
PROC. CAL. ACAD. SCI. 4th Series Vol. I] Pt. | [VAN DENBURGH] Plate 40
Fig. 1. Testudo ephippium Gunther.
Duncan Island. 29.5 inch male. From in front.
Fig. 2, Testudo ephippium Gunther.
Dunean Island. 29.5 inch male. From above.
PROC. CAL. ACAD. SCI. 4th Series Vol. II Pt. | [VAN DENBURGH] Plate 41
Fig. 1. Testudo ephippium Gunther.
Dunean Island. 29.5 inch male. From side.
Fig. 2, Testudo ephippium Gunther.
Duncan Island. 29.5 inch male. From in front
PROC. CAL. ACAD. SCI. 4th Series Vol. II Pt. | [VAN DENBURGH] Plate 42
Fie. 1. Testudo ephippium Gunther.
Dunean Island. 27.1 inch male. From above.
Fig. 2. Testudo ephippium Gunther.
Dunean Island. 27.1 inch male. From side.
te net red ee
PROC. CAL. ACAD. SCI. 4th Series Vol. II Pt. | [VAN DENBURGH] Plate 43
Fig. 1. Testudo ephippium Gunther
Duncan Island. 27.1 inch male. From in front.
Fig. 2. Testudo ephippium Gunther.
Dunean Island. 26.4 inch male. From above.
PROC. CAL. ACAD. SCI. 4th Series Vol. Il Pt. | [VAN DENBURGH] Plate, 44
r
Fig. 1. Testudo ephippium Gunther
Dunean Island. 26.4 inch male. From side.
?
Fig
Dunean Island. 26.4 inch male. From in front
Testudo ephippium Gunther
PROC. CAL. ACAD. SCI. 4th Series Vol. II Pt. | [VAN DENBURGH] Plate 45
Fig. 1. Testudo ephippium Gunther.
Dunean Island. 23.4 inch male. From above.
Fig. 2, Testudo ephippium Gunther.
Dunean Island. 23.4 inch male. From side.
PROC. CAL. ACAD. SCI. 4th Series Vol. Il Pt. | [VAN DENBURGH] Plate 46
Fig. 1. Testudo ephippium Gunther.
Dunean Island. 23.4 inch male. From in front.
Fig. 2, Testudo ephippium Gunther.
Dunean Island. 22.75 inch female. From above
PROC. CAL. ACAD. SCI. 4th Series Vol. I] Pt. | [VAN DENBURGH] Plate 47
Fig. 1. Testudo ephippium Gunther.
Duncan Island. 22.75 inch female. From side.
Fig. 2, Testudo ephippium Gunther.
Dunean Island. 22.75 inch female. From in front
PROC. CAL. ACAD. SCI. 4th Series Vol. Il Pt. | [VAN DENBURGH] Plate 48
Fig. 1. ‘Testudo ephippium Gunther.
Dunean Island. 21.7 inch female. From above.
?
Fig. 2, Testudo ephippium Gunther.
Dunean Island. 21.7 inch female. From side.
cA
PROC. CAL. ACAD. SCI. 4th Series Vol. I] Pt. | [VAN DENBURGH] Plate 49
areas
Fig. 1. Testudo ephippium Gunther
Dunean Island. 21.7 inch female. [From in front
Fig. 2, Testudo ephippivum Gunther
Dunean Island. 21.4 inch female. From aboyc
PROC. CAL. ACAD. SCI. 4th Series Vol. I] Pt. | VAN DENBURGH] Plate 50
in 3
Fig. 1. Testudo ephippium Gunther.
Dunean Island. 21.4 inch female. From. side.
?
Fig. 2, Testudo ephippium Gunther
Dunean Island. 21.4 inch female. From in front
PROC. CAL. ACAD. SCI. 4th Series Vol. II Pt. | [VAN DENBURGH] Plate 51
Fig. 1.) Testudo ephippium Gunther.
Dunean Island. 20.8 inch female. From above.
Fig. 2. Testudo ephippium Gunther.
Duncan Island. 20.8 inch female. From side.
PROC. CAL. ACAD. SCI. 4th Series Vol. II Pt. | VAN DENBURGH] Plate 52
Fig. 1. Testudo ephippium Gunther.
Dunean Island. 20.8 inch female. From in front.
Fig. 2. Testudo hoodensis Van Denburgh
Hood Island. 22.2 inch male. From above
PROC. CAL. ACAD. SCI. 4th Series Vol. Il Pt. | [VAN DENBURGH] Plate 53
Fig. 1. Testudo hoodensis Van Denburgh
Hood Island. 22.2 inch male. From side.
2. Testudo hoodensis Van Denburgh.
Fig
g.
Hood Island. 22.2 inch male. From in front.
PROC. CAL. ACAD. SCI. 4th Series Vol. II Pt. | VAN DENBURGH] Plate 54
Fig. 1. Testudo hoodensis Van Denburgh.
Hood Island. 21 inch female. From above
Fig. 2, Testudo hoodensis Van Denburgh.
Hood Island. 21 inch female. From side.
PROC. CAL. ACAD. SCI. 4th Series Vol. II Pt. | [VAN DENBURGH] Plate 55
Fig. 1. Testudo hoodensis Van Denburgh.
Hood Island. 21 inch female. From in front.
Fig, 2, Testudo elephantopus Harlan.
Charles Island. Adult male. From above. Copied from
Gunther's plate in Novitates Zoologice, Vol. IX.
PROC. CAL. ACAD. SCI. 4th Series Vol. II Pt. | [VAN DENBURGH] Plate 56
Fig. 1. Testudo elephantopus Harlan.
Charles Island. Adult male. From side. Copied from
Gunther's plate in Novitates Zoologica, Vol. IN.
?
Fig. 2. Testudo darwini Van Denburgh.
James Island. 40.25 inch male. From above.
PROC. CAL. ACAD. SCI. 4th Series Vol. Il Pt. | [VAN DENBURGH] Plate 57
Fig. 1. Testudo darwinit Van Denburgh.
James Island. 40.25 inch male. From side
Fig. 2. Testudo darwinit Van Denburgh
James Island. 40.25 inch male. From in frent
PROC. CAL. ACAD. SCI. 4th Series Vol. Il Pt. | {VAN DENBURGH
v
®
on
QO
Fig. 1. Testudo darwini Van Denburgh
James Island. 38 inch male. From above.
?
Fig. 2, Testudo darwini Van. Denburgh
James Island. 38 inch male. From side
PROC. CAL. ACAD. SCI. 4th Series Vol. II Pt. | [VAN DENBURGH] Plate 59
———
Fie. 1. Testudo darwint Van Denhureh
James Island. 38 inch male. From in front
Fig. 2. Testudo darwini Van Denburgh
James Island. 21 inch male. From above
PROC. CAL. ACAD. SCI. 4th Series Vol. I] Pt. | VAN DENBURGH] Plate 60
Fig. 1. Testudo darwint Van Denbureh
James Island. 21 inch male. From side.
>
Fig. 2. Testudo darwinit Van Denburgh
James Island. 21 inch male. From in front
PROC. CAL. ACAD. SCI. 4th Series Vol. II Pt. | VAN DENBURGH] Plate 61
Fig. 1. Testudo darwini Van Denburgh.
James Island. 30 inch female. From ahove
2, Testudo darwini Van Denburgh
Fig. 2
James Island. 30 inch female. From side.
PROC. CAL. ACAD. SCI. 4th
{\BURGH] Plate 62
|
Fig. 1. Testudo darwini Van Denhurgh
James Island. 30 inch female. From in frent
?
Fig. 2, Testudo darwini Van Denburgh
James Island. 25.75 inch female. From above
PROC. CAL. ACAD. SCI. 4th Series Vol. Il Pt. | VAN DENBURGH|] Plate 63
Fig. 1. Testudo darwinit Van Denburgh.
James Island. 25.75 inch female. From side,
Fig. 2. Testudo darwinit Van Denburgh
James Island. 25.75 inch female. From in front.
PROC. CAL. ACAD. SCI. 4th Series Vol. Il Pt. | (VAN DENBURGH] Plate 64
Siaeane
Fig. 1. Testudo chathamensis Van Denburgh.
Chatham Island. 35.25 inch bony carapace of male. From above.
Fig. 2, Testudo chathamensis Van Denburgh.
Chatham Island. 35.25 inch bony carapace of male. From side.
PROC. CAL. ACAD. SCI. 4th Series Vol. II Pt. | VAN DENBURGH]
Plate 65
Fig. 1. Testudo chathamensis Van Denburgh.
Chatham Island. 35.25 inch bony carapace of male. From in front.
Fig. 2. Testudo chathamensis Van Denburgh.
Chatham Island. 35.25 inch bony carapace of male. From below.
PROC. CAL. ACAD. SCI. 4th Series Vol. Il Pt. | VAN CENBURGH] Plate 66
Fig. 1. Testudo chathamensis Van Denburgh
Chatham Island. 25.25 inch bony carapace. From above.
Fig. 2, Testudo chathamensis Van Denburgh
Chatham Island. 25.25 inch bony carapace. [From side
Oo
PROC. CAL. ACAD. SCI. 4th Series Vol. I] Pt. | (VAN DENBURGH] Plate 67
Fig. 1. Testudo chathamensis Van Denburgh.
Chatham Island. 25.25 inch bony carapace. From in front
Fig. 2, Testudo chathamensis Van Denburgh
Chatham Island, 25.25 inch bony carapace. From helow
PROC. CAL. ACAD. SCI. 4th Series Vol. II Pt. | [VAN DENBURGH] Plate 68
Fig. 1. Testudo chathamensis Van Denburgh.
Chatham Island. 22.5 inch adult female. From above
Fig. 2. Testudo chathamensis Van Denburgh
Chatham Island. 22.5 inch adult female. From side.
PROC. CAL. ACAD. SCI. 4th Series Vol. II Pt. | [VAN DENBURGH] Plate 69
Fig. 1. Testudo chathamensis Van Denburgh.
Chatham Island. 22.5 inch adult female. From in front.
Fig. 2. Testudo chathamensis Van Denburgh
Chatham Island. 22.5 inch adult female. From below
PROC. CAL. ACAD. SCI. 4th Series Vol. Il Pt. | (VAN DENBURGH] Plate 70
Fig. 1. Testudo microphyes Gunther.
Tagus Cove, Albemarle Island. 40.5 inch male. From above.
Fig. 2, Testudo microphyes Gunther.
Tagus Cove, Albemarle Island. 40.5 inch male. From side.
PROC. CAL. ACAD. SCI. 4th Series Vol. Il Pt. | [VAN DENBURGH] Plate 71
Fig. 1. Testudo microphyes Gunther.
Tagus Cove, Albemarle Island. 40.5 inch male. From in front
2)
Fig. 2. Testudo microphyes Gunther
Tagus Cove, Albemarle Island. 37.8 inch male. From above.
“
‘
PROC. CAL. ACAD. SCI. 4th Series Vol. II Pt. | VAN DENBURGH] Plate 72
Fig. 1. Testudo microphyes Gunther
Tagus Cove, Albemarle Island. 37.8 inch male. From. side.
?
Fig. 2, Testudo microphyes Gunther
Tagus Cove, Albemarle Island. 37.8 inch male. From in front.
PROC. CAL. ACAD. SCI. 4th Series Vol. II Pt. {VAN DENBURGH] Plate 73
Fig. 1. Testudo microphyes Gunther
Tagus Cove, Albemarle Island. 37.5 inch male. From above.
Fig. 2. Testudo microphyes Gunther
Tagus Cove, Albemarle Island. 37.3 inch male. From above
, -
\
“
ra |
—_
i
cd
> Be ae
ey
+ oF
;
Lia
vin .
‘
‘
PROC. CAL. ACAD. SCI. 4th Series Vol. Il Pt. | [VAN DENBURGH] Plate 74
Fig. 1. Testudo microphyes Gunther.
Tagus Cove, Albemarle Island. 37.3 inch male. From side.
?
Fig. 2, Testudo microphyes Giinther
Tagus Cove, Albemarle Island. 37.3 inch male. From in front
PROC. CAL. ACAD. SCI. 4th Series Vol. Il Pt. | [VAN DENBURGH] Plate 75
Fig. 1. Testudo microphyes Gunther
Tagus Cove, Albemarle Island. 36.25 inch male. From above.
Fig. 2. Testudo microphyes Gunther.
Tagus Cove, Albemarle Island. 36.25 inch male. From side.
PROC. CAL. ACAD. SCI. 4th Series Vol. Il Pt. | [VAN DENBURGH] Plate 76
—:
Fig. 1. Testudo microphyes Gunther
Tagus Cove, Albemarle Island. 36.25 inch male. From in front.
Fig. 2. Testudo microphyves Gunther.
Tagus Cove, Albemarle Island. 36 inch male. irom above.
PROC. CAL. ACAD. SCI. 4th Series Vol. Il Pt. | VAN DENBURGH}) Plate 77
Fig. 1. Testudo microphyes Gunther
Tagus Cove, Albemarle Island. 36 inch male. From side.
tits Billie 0 tale
Fig. 2. Testudo microphyes Gunther.
Tagus Cove, Albemarle Island. 36 inch male. From in front.
PROC. CAL. ACAD. SCI. 4th Series Vol. II Pt. | [VAN DENBURGH] Plate 78
Fig. 1. Testudo microphyes Gunther
Tagus Cove, Albemarle Island. 34.5 inch male. From above.
Fig. 2. Testudo microphyes Gunther.
Tagus Cove, Albemarle Island. 34.5 inch male. From side.
PROC. CAL. ACAD. SCI. 4th Series Vol. II Pt. | (VAN DENBURGH] Plate 79
—
Fig. 1, Testudo microphyes Gunther
Tagus Cove, Albemarle Island. 34.5 inch male. From in front
Fig. 2. Testudo microphyes Giinther
Cape Rose, Albemarle Island. 38 inch male. From above
PROC. CAL. ACAD. SCI. 4th Series Vol. II Pt. | VAN DENBURGH] Plate 80
Fig 1.) Testudo microphyes Gunther.
Cape Rose, Albemarle Island. 38 inch male. From side
?
Fig. 2. Testudo microphyes Gunther.
Cape Rose, Albemarle Island. 38 inch male. From in front.
PROC. CAL. ACAD. SCI. 4th Series Vol. I] Pt. | [VAN DENBURGH] Plate 81
—
Fig, 1 Testudo microphyes Gunther.
Cape Rose, Alkemarle Island. 35.25 inch male. From above.
Fie. 2. Testudo microphyes Gunther
Cepe Rose. Albemarle Island. 35.25 inch male. From. side
PROC. CAL. ACAD. SCI. 4th Series Vol. II Pt. | VAN DENBURGH|] Plate 82
lig. 1.) Testudo microphyes Gunther
Cape Rose, Albemarle Island. 35.25 inch male. From in front.
>
Testudo microphyes Gunther.
Cape Rose, Albemarle Island. 25 inch female. From above.
lig
PROC. CAL. ACAD. SCI. 4th Series Vol. II Pt. | [VAN DENBURGH] Plate 83
Fig. 1. Testudo microphyes Gunther.
Cape Rose, Albemarle Island. 25 inch female. From side.
>
Fig. 2
Cape Rose, Albemarle Island. 25 inch female. From in front.
Testudo microphyes Gunther.
PROC. CAL. ACAD. SCI. 4th Series Vol. I] Pt. | VAN DENBURGH] Plate 84
Fig. 1. Testudo guntheri Baur
Vilamil, Albemarle. 40 inch male. From above
Fie. 2, Testudo gtntheri Baur
Vilamil, Albemarle. 40 inch male. From side.
PROC. CAL. ACAD. SCI. 4th Series Vol. II Pt. | (VAN DENBURGH] Plate 85
Fig. 1. Testudo guntheri Baur.
Vilamil, Albemarle. 40 inch male. From in front
?
Fig. 2. Testudo gtintheri Baur
Vilamil, Albemarle. 39 inch male. From above
PROC. CAL. ACAD. SCI. 4th Series Vol. II Pt. | [VAN DENBURGH] Plate 86
Fig. 1. Testudo guntheri Baur.
Vilamil, Albemarle. 39 inch male. From side
?
Testudo gtntheri Bavr
Vilamil, Albemarle. 39 inch male. From in front.
Fig
PROC. CAL. ACAD. SCI. 4th Series Vol. II Pt. | [VAN DENBURGH] Plate 87
Fig. 1. Testudo guntheri Baur
Vilamil, Albemarle Island. 28 inch male. From above
—
Fig, 2. Testudo gtintheri Baur
Vilamil, Albemarle Island. 28 inch male. From side
PROC. CAL. ACAD. SCI. 4th Series Vol. II Pt. | [VANRDENBURGH] Plate 88
Fig. 1. Testudo gtntheri Baur.
Vilamil, Albemarle Island. 28 inch male. From in front.
?
Fig. 2, Testudo gtintheri Baur
Vilamil, Albemarle Island. 25.1 inch male. From above
PROC. CAL. ACAD. SCI. 4th Series Vol. Il Pt. | VAN DENBURGH] Plate 89
Fig. 1. Testudo gtintheri Baur.
Vilamil, Albemarle Island. 25.1 inch male. From side.
Fig. 2. Testudo guntheri Baur.
Vilamil, Albemarle Island. 25.1 inch male. From in front
PROC. CAL. ACAD. SCI. 4th Series Vol. II Pt. | [VAN DENBURGH] Plate 90
(@)
Fie. 1. Testudo guntheri Baur
Vilamil, Albemarle Island. 28.8 inch female. From above.
Fig. 2. Testudo gtntheri Baur.
Vilamil, Albemarle Island. 28.8 inch female. [rom side
PROC. CAL. ACAD. SCI. 4th Series Vol. I] Pt. | [VAN DENBURGH] Plate 91
Fig. 1. Testudo guntheri Baur.
Vilamil, Albemarle Island. 28.8 inch female. [rom in front.
Fig. 2. Testudo gtintheri Baur.
Vilamil, Albemarle Island. 27.9 inch female. From above.
PROC. CAL. ACAD. SCI. 4th Series Vol. II Pt. | {VAN DENBURGH] Plate 92
Fig. 1. Testudo gtntheri Baur.
Vilamil, Albemarle Island. 27.9 inch female. From side
Fig. 2, Testudo gtntheri Baur
Island. 27.9 inch female. From in front.
Vilamil, Albemarle
PROC. CAL. ACAD. SCI. 4th Series Vol. II Pt. | VAN DENBURGH] Plate 93
Fig. 1. Testudo vicina Giinther,
Iguana Cove, Albemarle Island. 43 inch male. From above.
Fig. 2. Testudo vicina Gtinther.
Iguana Cove, Albemarle Island. 43 inch male. From side.
PROC. CAL. ACAD. SCI. 4th Series Vol. Il Pt. | VAN DENBURGH] Plate 94
Fig. 1. Testudo vicina Gunther
Iguana Cove, Albemarle Island. 43 inch male. From in front
Fig. 2. Testudo vicina Gunther.
Iguana Cove, Albemarle Island. 41 inch male. From above
PROC. CAL. ACAD. SCI. 4th Series Vol. Il Pt. | [VAN DENBURGH] Plate 95
iz ¥ mee
AVE
Fig. 1. Testudo vicina Gunther,
Iguana Cove, Albemarle Island. 41 inch male. From side
?
Fig. 2. Testudo vicina Gunther.
Iguana Cove, Albemarle Island. 41 inch male. From in front
PROC. CAL. ACAD. SCI. 4th Series Vol. II Pt. | (VAN DENBURGH] Plate 96
:
Fig. 1. Testudo vicina Ginther,
Iguana Cove, Albemarle Island. 38.5 inch male. From above.
Fig. 2. Testudo vicina Gunther.
Tguana Cove, Albemarle Island. 38.5 inch male. From side.
PROC. CAL. ACAD. SCI. 4th Series Vol. Il Pt. | [VAN DENBURGH] Plate 97
Fig. 1. Testudo vicina Gunther.
Iguana Cove, Albemarle Island. 38.5 inch male. From in front.
?
Fig. 2, Testudo vicina Gtinther
[Iguana Cove, Albemarle Island. 37.2 inch male. T'rom above
‘o
PROC. CAL. ACAD. SCI. 4th Series Vol. Il Pt. | [VAN DENBURGH] Plate 98
ig. 1. Testudo vicina Gunther
Iguana Cove, Al
5
| ?
semarle Island. 37.2 inch male. From side
Fig. 2, Testudo vicina Gunther
Iguana Cove, Albemarle Island. 37.2 inch male. From in front
PROC. CAL. ACAD. SCI. 4th Series Vol. II Pt. | (VAN DENBURGH] Plate 99
Fig. 1. Testudo vicina Gunther.
Iguana Cove, Albemarle Island. 35.25 inch male. From above
?
Fig. 2. Testudo vicina Gunther.
Iguana Cove, Albemarle Island. 35.25 inch male. From side
PROC. CAL. ACAD. SCI. 4th Series Vol. II Pt. | (VAN DENBURGH] Plate 100
Fig. 1. Testudo vicina Gunther
Iguana Cove, Albemarle Island. 35.25 inch male. From in front
Fig. 2. Testudo vicina Gunther.
Cobos Settlement, Albemarle Island. 40.5 inch male. From above.
PROC. CAL. ACAD. SCI. 4th Series Vol. Il Pt. | [VAN DENBURGH} Plate 101
Fig. 1. Testudo vicina Ginther,
Cobos Settlement, Albemarle Island. 40.5 inch male. From side.
Fig. 2. Testudo vicina Gutnther.
Cobos Settlement, Albemarle Island. 40.5 inch male. From in front.
PROC. CAL. ACAD. SCI. 4th Series Vol. Il Pt. | [VAN DENBURGH] Plate 102
Fie. 1. Testudo vicina Gunther,
Cobos Settlement, Albemarle Island. 33.3 inch male. From above
Fie. 2. Testudo vicina Gunther.
Cobos Settlement, Albemarle Island. 33.3 inch male. From side.
PROC. CAL. ACAD. SCI. 4th Series Vol. Il Pt. | [VAN DENBURGH] Plate 103
Fig. 1. ‘Testudo vicina Gunther
Cobos Settlement, Albemarle Island. 33.3 inch male. Irom in front.
Fig. 2, Testudo vicina Gunther.
Vilamil, Albemarle Island. 33 inch male. From abov«
PROC. CAL. ACAD. SCI. 4th Series Vol. Il Pt. | [VAN DENBURGH] Plate 104
Fig. 1. Testudo vicina Gunther
Vilamil, Albemarle Island. 33 inch male. From side.
aaa =
Fig. 2, Testudo vicina Gunther.
Vilamil, Albemarle Island. 33 inch male. From in front
PROC. CAL. ACAD. SCI. 4th Series Vol. II Pt. | VAN DENBURGH] Plate 105
Fig. 1. Testudo vicina Gunther
Vilamil, Albemarle Island. 26.8 inch male. From above
>
Testudo vicina Gunther
Vilamil, Albemarle Island. 26.8 inch male. From side
Fig
PROC. CAL. ACAD. SCI. 4th Series Vol. Il Pt. | [VAN DENBURGH] Plate 106
Fig. 1. Testudo vicina Gtnther.
Vilamil, Albemarle Island. 26.8 inch male. From in front.
Fig. 2. Testudo vicina Giinther.
Vilamil, Albemarle Island. 24.4 inch male. From above
PROC. CAL. ACAD. SCI. 4th Series Vol. Il Pt. | (VAN DENBURGH] Plate 107
Fig 1. Testudo vicina Gunther.
Vilamil, Albemarle Island. 24.4 inch male. From side
Fig. 2. Testudo vicina Gunther.
Vilamil, Albemarle Island. 24.4 inch male. From in front.
PROC. CAL. ACAD. SCI. 4th Series Vol. II Pt. | [VAN DENBURGH] Plate 108
Fig. 1. Testudo vicina Gunther
Vilamil, Albemarle Island. 28.75 inch female. From above.
Fig. 2. Testudo vicina Gunther.
Vilamil, Albemarle Island. 28.75 inch female. From side
PROC. CAL. ACAD. SCI. 4th Series Vol. II Pt. | [VAN DENBURGH] Plate 109
—
Fig. 1. Testudo vicina Gunther
Vilamil, Alhemarle Island. 28.75 inch female. From in front
Fig. 2. Testudo vicina Gunther
Vilamil, Albemarle Island. 27.5 inch female. From above.
PROC. CAL. ACAD. SCI. 4th Series Vol. II Pt. | VAN DENBURGH] Plate 110
Fig. 1. Testudo vicina Gunther.
Vilamil, Albemarle Island. 27.5 inch female. From side
Fig. 2, Testudo vicina Gunther
Vilamil, Albemarle Island. 27.5 inch female. From in front
PROC. CAL. ACAD. SCI. 4th Series Vol. II Pt. | [VAN DENBURGH] Plate 111
——--—-——
Fig. 1. Testudo wallacei Rothschild.
Type specimen in the Tring Museum.
Fig. 2. Testudo wallacei Rothschild
Jervis Island. 36.2 inch male. From above
PROC. CAL. ACAD. SCI. 4th Series Vol. II Pt. | [VAN DENBURGH] Plate 112
lig. 1. Testudo wallacei Rothschild.
Jervis Island. 36.2 inch male. From side.
Fig. 2. Testudo wallacei Rothschild
Jervis Island. 36.2 inch male. From in front.
PROC. CAL. ACAD. SCI. 4th Series Vol. Il Pt. | [VAN DENBURGH] Plate 113
Fig. 1. Testudo porteri Rothschild.
Indefatigable Island. 41.4 inch male. From above.
Fig. 2, Testudo porteri Rothschild
Indefatigable Island, 41.4 inch male. From side.
PROC. CAL. ACAD. SCI. 4th Series Vol. II Pt. | [VAN DENBURGH] Plate 114
Fig. 1 Testudo porteri Rothschild.
Indefatigable Island. 41.4 inch male. From in front.
Fig. 2. Testudo porteri Rothschild
Indefatigable Island. 40.3 inch male. From above
PROC. CAL. ACAD. SCI. 4th Series Vol. Il Pt. | [VAN DENBURGH] Plate 115
Fig. 1. Testudo porteri Rothschild.
Indefatigable Island. 40.3 inch male. From side.
Fig. 2, Testudo porter1 Rothschild
Indefatigable Island. 40.3 inch male. From in front
PROC. CAL. ACAD. SCI. 4th Series Vol. Il Pt. | [VAN DENBURGH] Plate 116
Fig. 1. Testudo porteri Rothschild.
Indefatigable Island. 39.6 inch male. From above.
Fig. 2, Testudo porteri Rothschild.
Indefatigable Island. 39.6 inch male. Irom side.
PROC. CAL. ACAD. SCI. 4th Series Vol. II Pt. | [VAN DENBURGH] Plate 117
Fig. 1. Testudo porteri Rothschild
Indefatigable Island, 39.6 inch male. From in front.
?
Fig
g.
Indefatigable Island. 35.5 inch male. From above.
Testudo porteri Rothschild.
PROC. CAL. ACAD. SCI. 4th Series Vol. I] Pt. | VAT ENBURGH] Plate 118
Fig. 1. Testudo porteri Rothschild
Indefatigable Island. 35.5 inch male. From side.
Fig. 2, Testudo porter1 Rothschild.
Indefatigable Island. 35.5 inch male. From in front
PROC. CAL. ACAD. SCI. 4th Series Vol. II Pt. | [VAN DENBURGH] Plate 119
Fig. 1. Testudo porteri Rethsehild
Indefatigable Island. 35.8 inch female. From above
r
Fig. 2, Testudo porteri Rothschild
Indefatigable Island. 35.8 inch female. From side
. ACAD. SCI. 4th Series Vol. II Pt. | VAN DENBURGH] Plate 120
Fig. 1 Testudo porteri Rothschild
Indefatigable Island. 35.8 inch female. From in front
Fig. 2, Testudo porteri Rothschild.
|
Indefatigable Island. 28.75 inch female. From above.
PROC. CAL. ACAD. SCI. 4th Series Vol. Il P
[VAN DENBURGH] Plate 121
Fig. 1. Testudo porteri Rothschild.
Indefatigable Island. 28.75 inch female. From side.
Fig. 2, Testudo porter1 Rothschild
I
Indefatigable Island. 28.75 inch female. From in front.
PROC. CAL. ACAD. SCI. 4th Series Vol. II Pt. | [VAN DENBURGH] Plate 122
= : . K =
Fig. 1. Testudo, species.
Cowley Mountain, Albemarle Island. 26.75 inch female. From above.
Fig. 2. Testudo, species
Cowley Mountain, Albemarle Island. 26.75 inch female. From side.
PROC. CAL. ACAD. SCI. 4th Series Vol. II Pt. | [VAN DENBURGH] Plate 123
Fig. 1. Testudo, species
Cowley Mountain, Albemarle Island. 26.75 inch female. From in front.
Fig. 2, Testudo, species
Barrington Island. Bones of tortoises.
“puUuLrys]
1} OAR SBBA sayy
oO
PEL Feld [HDYNENIG NVA] 1 ‘}d I 1OA S
28S UW IOS “GVOV “1VO “O0dd
PROCEEDINGS
OF THE
CALIFORNIA ACADEMY OF SCIENCES
FourtuH SERIES
Vor, Pr Not tl, pps3757882: DECEMBER 31, 1917
EXPEDITION OF THE CALIFORNIA ACADEMY OF
SCIENCES TO THE GALAPAGOS
ISLANDS, 1905-1906
XI
PRELIMINARY DESCRIPTIONS OF NEW SPECIES
OF PULMONATA OF THE GALAPAGOS ISLANDS
BY WILLIAM HEALEY DALL
A full discussion of, and report upon, the collection of
landshells and Tertiary fossils collected by Mr. W. H. Ochs-
ner has been prepared and submitted for publication. But
the publication seeming likely to be delayed, it was thought
best to print diagnoses of the new species in order that the
credit due to the collector and to the Academy might not be
diminished by later researches carried on by other agencies.
The types of these new forms form part of the Academy’s
collection; cotypes have been deposited in the collection of
the U. S. National Museum at Washington.
It is expected that when the complete report is issued the
species will be suitably figured, and that report contains a
full discussion of their relations to other previously described
species and to the conditions under which they live.
The descriptions of the new species of fossils are less likely
to be anticipated and are therefore left for appearance in the
final report.
December 31, 1917
376 CALIFORNIA ACADEMY OF SCIENCES [Proc. 47H Ser.
1. Bulimulus (Nesiotus) elezodes, new species
Shell small, ovate-conic, with six whorls separated by a
well marked suture, the nucleus strongly striated, the apex
dimpled, thin, fragile, with low feeble wrinkles, sometimes
strong on the base; color oily white, with irregular brownish
axial streaks, and a concentration of reddish brown in a nar-
row space in front of the suture and on the pillar; aperture
less than half as long as the shell, body without enamel, outer
lip very thin and sharp, pillar thin, short, straight with a
slight reflexion over a narrowly perforate umbilicus. Length
of shell 13.5. ; of last whorl 6.5 ; diameter 7.0 mm.
Albemarle Island, on leaves, hibernating, at 1500 to 2300
feet elevation, near Banks Bay; Ochsner.
2. Bulimulus (Nesiotus) hemzrodes, new species
Shell small, livid pinkish brown, of five and a half whorls:
the apex dimpled, the nuclear whorls distinctly transversely
minutely ribbed; surface of spire polished, with microscopic
spiral striation not beaded; the transverse sculpture varying
in individuals from faint incremental lines to regular narrow
riblets or irregular ridges; on the last whorl especially the
most extremely rugose sculpture has a worm-eaten appear-
ance, while in other individuals the rugosities may be minute
and regular, or deferred to the last quarter of a whorl. Nor-
mal specimens show a pale, narrow peripheral band, but in
very rugose individuals this is lost; the last whorl, especially
when very rough, is whiter than the rest of the shell; mar-
gin of the aperture thin, sharp, the outer lip not reflected, the
umbilicus a narrow perforation; the axis continuously tubu-
lar, simple, not twisted. Length of shell 12 ; of last whorl
9 ; diameter 7 mm.
Hibernating under dead wood on Cowley Mountain, Albe-
marle Island, between 2100 and 2300 feet elevation, in. the
grassy zone; and hibernating on the grassy rim of the crater
of Narborough up to 4500 feet; Ochsner.
3. Bulimulus (Nesiotus) perrus, new species
Shell small, shiny, ruddy brown, a narrow pale area in
front of the suture; apex blunt, dimpled nucleus faintly
e
Vot. II, Pr. I] DALL—GALAPAGOS PULMONATA 377
transversely striated; whorls rounded with a deep suture;
sculpture of rather irregular feeble axial wrinkles, stronger
on the last whorl; base rounded, with a minute umbilical per-
foration; aperture with a thin sharp, not reflected margin;
pillar short, reflected over the umbilical perforation; there
are a few obscure spirals on the upper whorls, but no dis-
tinct or regular spiral striation. Length of shell 12.0 ; of
last whorl 8.0 ; of aperture 5.5 ; diameter 6.0 mm.
Narborough Island, in the grassy area at the rim of the
crater, 2000 to 4500 feet elevation; Ochsner.
4. Bulimulus (Nesiotus) cucullinus, new species
Shell with a dimpled apex of livid slate-color, two strongly
transversely striated nuclear whorls and about four subse-
quent moderately convex whorls separated by a distinct but
not deep suture; color of the shell grayish white, covered
by an olivaceous brown periostracum, smooth but not lus-
trous; sculpture only of inconspicuous incremental axial
lines, more or less irregularly disposed; base produced, with
a very narrow umbilical perforation largely covered by the
reflected inner lip; aperture subovate, the margin callous,
expanded and almost reflected; the pillar and outer lips
united across the body by a thin layer of vitreous enamel, the
rest of the margin of the aperture conspicuously white, the
throat livid. Length of shell 19 ; of last whorl 12 ; of
aperture 9 ; diameter 9.5 mm.
Found by Mr. Ochsner on Hood Island hibernating under
stones between 200 and 600 feet elevation; a variety with
faint indications of a peripheral band, with the others and
also on Charles Island in the moist area under moss and
grass at 1650 feet; and on Barrington Island under stones
in hibernation at 200 feet; lastly a paler variety on Hood
Island at 380 feet elevation.
5. Bulimulus (Nesiotus) albemarlensis, new species
Shell of the general aspect of fortuganus but larger; solid,
stout, inflated, short-spired, with six rapidly increasing
whorls; apex dimpled, nuclear whorls small, transversely
378 CALIFORNIA ACADEMY OF SCIENCES [Proc. 4TH Ser.
striated; sculpture of upper whorls of retractively inclined
close-set rather vermiculate axial wrinkles crossed by numer-
ous fine sharp spiral strize; in some specimens this sculpture
covers the whole shell but in most the last whorl becomes
rudely and irregularly coarsely wrinkled and punctate to a
greater or less extent; the normal sculpture retains the pink-
ish light brown color which follows the rose pink of the
apical turns, but when the abnormal wrinkling begins the
surface becomes of a dirty white color; a pale peripheral
band on the last whorl is preserved in most specimens; the
suture is deep but not channelled; the base rounded, with an
almost imperforate umbilical pit partly covered in the adult
by the reflexion of the pillar lip; aperture subquadrate, the
margin thickened but the outer lip not reflected, showing a
slight thickening in fully adult specimens on its inner side
medially; the pillar has a thick lump of white callus upon it,
and is joined to the outer lip over the body by a deposit of
enamel; the throat is of a dark flesh-color. Length of shell
15. ; of last whorl 12 ; of aperture 8 ; diameter 9 mm.
On bushes and grass near Villamil at 2300 to 3300 feet
elevation; Ochsner.
6. Bulimulus (Nesiotus) akamatus, new species
Shell solid, chocolate brown, of six and a half whorls;
apex dimpled, dark crimson, nuclear whorls transversely stri-
ated; sculpture of rather irregular moderately prominent in-
cremental lines, except on the last half of the last whorl
which is irregularly malleated and indented the whole
crossed by very faint and minute spiral striz; suture dis-
tinct, not deep, base rounded with a rather wide subcylindric
umbilical perforation; aperture small with a continuous,
thickened, not reflected margin; callosities white, that on the
pillar continued halfway through the last whorl, diminish-
ing around the axis; the medial thickening of the outer lip
is also continued backward some distance, as is a very promi-
nent narrow tubercle on the body between the two lips; the
upper part of the axis is slender and simple. Length of shell
15 ; of last whorl 10 ; of aperture 5.5 ; diameter 8 mm.
Found by Ochsner on Indefatigable Island, under blocks
of lava, at 200 to 650 feet elevation, in the arid zone.
Vor. IT, Prt] DALL—GALAPAGOS PULMONATA 379
7. Bulimulus (Nesiotus) adelphus, new species
Shell of the same general type as the preceding from which
it is best distinguished by a differential diagnosis: it is of
a light or very pale yellowish brown with a paler peripheral
band, six whorls, retractively, closely, axially threaded, the
threads cut into granules by sharp spiral strize, the last half
of the last whorl irregularly corrugated; the axial perfora-
tion larger, the aperture subquadrate with continuous margin
thickened but not reflected, a large tubercle on the pillar, a
prominent one medially on the inside of the outer lip, a much
smaller one on the body deeper in the throat: the axis is
simple, tubular and not twisted. Length of shell 14.5. ; of
last whorl 10.0 ; of aperture 5.5: diameter 9 mm.
Found with the preceding species by Ochsner in the arid
zone.
8. Bulimulus (Nesiotus) lycodus, new species
Shell small, solid, subacute, white, or yellowish white, with
a rose pink or bluish apex and six rapidly enlarging whorls;
upper whorls finely, retractively, axially, closely threaded,
with fine spiral striation, the suture appressed; last whorl
very coarsely, irregularly corrugated and punctate; base
rounded with a narrow umbilical perforation; aperture with
a thick continuous white margin slightly expanded but not
reflected; the mesial thickening of the outer lip obsolete, per-
ceptible in only a few specimens: pillar with a very anterior
strong anteriorly inclined tubercle, continued into the throat
as a diminishing ridge around the axis of the last whorl; on
the body is a sharp prominent narrow tooth also prolonged
backward as a narrow ridge; axis in the upper whorls very
slender and conspicuously twisted. Length of shell 11; of
last whorl 8 ; of aperture 4.5 : diameter 8 mm.
Found by Ochsner on Indefatigable Island on tree trunks
at 450 to 550 feet elevation.
9. Bulimulus (Nesiotus) alethorhytidus, new species
Shell small, resembling the preceding but with the promi-
nent characters exaggerated and the size much reduced ;
whorls five, rapidly enlarging, nucleus sparsely transversely
minutely lamellose, dimpled, the first three whorls rather
380 CALIFORNIA ACADEMY OF SCIENCES [Proc. 4tH Ser.
irregularly retractively axially finely wrinkled; last two
coarsely irregularly strongly wrinkled all over; umbilicus
minutely perforate, base rounded; aperture small, contracted,
thickened, with continuous not reflected margin; pillar and
body with prominent tubercles, that on the pillar continued
backward into the penultimate whorl as an obscure plait, that
on the body also continued for a shorter distance in the last
whorl, the axis in the earlier whorls slender, perforate.
Length of shell 8.0 ; of last whorl 5.5 ; of aperture
3.5; diameter 5.5 mm.
Indefatigable Island, in the moist area on the south side
at 350 to 400 feet, and at all altitudes in the interior; Ochs-
ner.
10. Bulimulus (Nesiotus) cymatias, new species
Shell small, solid, uniform yellowish brown, with nearly
seven whorls, rapidly enlarging; surface uniformly sculp-
tured with slightly irregular retractive narrow, close-set
wrinkles crossed by extremely fine spiral threads of which
at regular intervals one is more prominent than the rest:
near the aperture are some irregular rugosities or indenta-
tions in some specimens but no change of color; there is a
narrow inconspicuous pale peripheral band ending behind
the median tubercle of the outer lip; base rounded, umbilicus
narrowly perforate; aperture with a continuous thickened
margin, a well defined tubercle inside the outer lip, a strong
tooth anteriorly on the pillar, and one on the body; both
these are continued into the shell, the one on the pillar as a
strongly undulated ridge which extends, diminishing into the
penultimate whorl, while the parietal tooth also extends in-
ward about half a whorl, but less distinctly undulated and
rapidly diminishing; the tubercle on the outer lip is hardly
extended. Length of shell 14 : of last whorl 8 ; of
aperture 5 ; diameter 8 mm.
Indefatigable Island, under lava blocks in a moist area be-
tween 400 and 650 feet elevation; Ochsner.
11. Bulimulus (Nesiotus) ochsneri, new species
Shell chocolate brown, with no indications of a peripheral
band, solid, stout, with six and a half whorls; apex dimpled,
closely transversely sculptured, tinged with deep carmine;
Vor. II, Pr. 1] DALL—GALAPAGOS PULMONATA 381
sculpture of the upper whorls much like that in B. cymatias
but the spiral sculpture more or less broken into dots; last
half of the last whorl with the surface irregularly coarsely
corrugated, but with no change of color; suture distinct, not
appressed; aperture with a thickened white, not reflected,
continuous margin; umbilical perforation small; outer lip
straight, not reinforced in the middle by any ridge or tu-
bercle; pillar with a large shapeless tubercle on the middle
which is not produced backward into the whorl; body with
a small tubercle moderately produced inward in a feeble way;
axis of the upper whorls, simple tubular. Length of shell
17.5 ; of last whorl 13.0 ; of aperture 8.0 ; diameter
10.0 mm.
Indefatigable Island, under lava blocks at 200 to 650 feet
altitude; Ochsner.
12. Bulimulus (Nesiotus) jervisensis, new species
Shell rude, showing remnants of a brown periostracum,
short-conic, with five and a half whorls; nucleus crimson,
dimpled, transversely irregularly feebly wrinkled; the last
one irregularly more or less corrugated; spiral sculpture of
fine sharp close-set striz over the whole shell; aperture
slightly thickened at the margin, not reflected, the pillar and
outer lips united by a layer of enamel on the body; umbilical
perforation very small; an obscure small tubercle on the
body, and in most specimens a slight ill-defined thickening
on the pillar; axis slightly twisted, very slender in the upper
whorls. Length of shell 17 ; of last whorl 13.5 ; of
aperture 9 ; diameter 11 mm.
A few dead specimens were collected on Jervis Island at
an elevation of 900 to 1000 feet, by Mr. Ochsner.
13. Bulimulus (Nesiotus) rabidensis, new species
Shell rather elongate, its profile more cylindrical than in
sculpturatus, thin, of about seven slightly convex whorls,
separated by a distinct, not appressed, suture; apex dimpled,
nucleus transversely minutely ribbed; the next two or three
whorls sharply closely spirally threaded, the threads slightly
pustular when they cross axial irregularities; the subsequent
whorls irregularly subaxially rugose with low broken ridges,
increasing in number and strength toward the aperture; the
382 CALIFORNIA ACADEMY OF SCIENCES [Proc.4tH Ser.
spirals continue to the aperture; the color of the last whorl
dirty white, the earlier whorls dull flesh color, the apex usu-
ally pale, and in rare instances a pale peripheral band is pres-
ent; umbilical perforation minute; aperture with a thickened
not reflected, continuous margin, the pillar and body as well
as the outer lip without projecting callosities; the axis very
slender and distinctly twisted, probably not tubular. Length
of shell 15.5 ; of last whorl 9:0 % of ‘aperture 5.5 ;
diameter 7.0 mm.
Obtained by Mr. Ochsner in “a fairly dry” region on Jer-
vis (or Rabida) Island, at an altitude of 900 to 1000 feet.
14. Helicina (Idesa) ochsneri, new species
Shell much resembling H. nesiotica in a general way but
higher, more conical and slightly larger; while nesiotica has
a thin smooth periostracum and the specimens are clean when
living, the present species has a blackish periostracum which
is raised on the spire between the sutures into two or three
fringed short spiral threads. The periostracum appears to
be of an adhesive nature and all the specimens in their origi-
nal condition are more or less covered with a blackish coat-
ing. When this is cleaned off the underlying shell has much
the coloration and surface of nesiotica. Maximum diameter
of shell 4.7; height 3.5 mm.
Albemarle Island, eight miles west of Turtle Cove, near
salt lagoon; and at Cowley Mountain on moist ground, 350
to 500 feet above the sea; Ochsner.
15. Williamia galapagana Dall.
Shell small, ovate, conical, the apex curved forward and
situated at about the anterior third of the length; surface
probably with a thin periostracum when fresh, but in all spec-
imens seen this has been lost and the surface is brilliantly
polished; the color is of a rosy brown with numerous paler
radial streaks; margin simple, often slightly irregular from
adapting itself to the sustaining surface; muscular scar in-
terrupted as usual in the family. Length 9.0 ; height
3.5; breadth 7.0 mm.
Station on floating seaweed at the Galapagos Islands;
specimens collected on the beach at Hood and Chatham
Islands.
INDEX TO VOLUME II, PART ONE (FOURTH SERIES)
New Names in Blackface Type
A
Abingdon Island Lizard, 143-147
Tortoise, 296-299
abingdonensis, Tropidurus, 136, 138
abingdoni, Testudo, 259, 290, 293, 296-299
abingdonii, Testudo, 244, 296, 306
Tropidurus, 136, 143
“Academy,” 2, 98, 242
acuta, Dafila, 80
Adams, C. F., 228
adelphus, Bulimulus (Nzsiotus), 379
/Egialeus semipalmatus, 53
/Epyornithes, 207
zthereus, Phaethon, 104-107
Agassiz, A., 228
Louis, 135, 226
akamatus, Bulimulus (Nzsiotus), 378
alba, Gygis, 32-34
“Albatross,”’ 136, 147, 155, 159, 172, 228,
245
Albatross, Galapagos, 91
albemarlensis barringtonensis, Tropi-
durus, 133, 139, 143, 168-172
Bulimulus (Nezsiotus), 377-378
Tropidurus, 133, 136, 137, 139, 143,
168, 172-188
alethorhytidus, Bulimulus (Nesiotus),
379-380
Amblyoma pilosum, 235
Amblyrhynchus ater, 192
(Amblyrhynchus) ater, Hypsilophus, 192
Iguana, 192
Amblyrhynchus cristatus, 133, 192-194
ater, 192
(Amblyrhynchus) cristatus, Hypsilo-
phus, 192
Iguana, 192
Amblyrhynchus cristatus nanus, 192
demarlii, 188
subcristatus, 188
American Flamingo, 66-76
Americana, Mareca, 80
“Anas maculirostris,”’ 79
Anous stolidus, 24-29, 41, 113
Anseriformes, 5
antillarum, Sterna, 41
antipodum, Megadyptes, 18
aquila, Fregata, 100-104, 130 (pl. 6), 132
(pl. 7)
Ardea herodias, 58-59, 114
arenaria, Calidris, 56
Arenaria interpres, 46-47
Atahualpa, 209
ater, Amblyrhynchus, 192
cristatus, 192
Hypsilophus (Amblyrhynchus),
192
Iguana (Amblyrhynchus), 192
Audubon, 109 (footnote)
Bahama Pintail, 44, 69, 70, 76-78, 79, 80
bahamensis, Peecilonetta, 76-78
Baird’s Sandpiper, 57
bairdi, Heteropygia, 57
Baldpate, 80
Bangs, 59 (footnote)
Barrington Island Land Iguana, 190-192
Lizard, 168-172
Tortoise, 365-366
barringtonensis, Tropidurus, 137, 138,
168
albemarlensis, 133, 139, 143,
168-172
grayi, 137, 168
Baur, 135, 136, 137, 138, 159, 164, 168, 172,
210, 228, 245, 246, 247, 249, 251, 252,
254, 255, 256, 257, 258
“Beagle,’”’ 135, 164, 220, 221, 222
becki, Testudo, 237, 244, 259, 292, 293,
298, 301, 303-305, 317
bedsi, Testudo, 303
Bell, Thomas, 135
Bibliography (Gigantic Land Tortoises),
369-372
Bibron, 223
and Dumeril, 249
Bindloe Island Lizard, 150-154, 159
Birds of the Galapagos Islands, with
observations on the birds of Cocos
and Clipperton islands (Columbi-
formes to Pelecaniformes), by Ed-
ward Winslow Gifford, 1-132
bivittata, Craniopeltis, 135, 136, 155
bivittatus, Tropidurus, 133, 137, 138, 139,
142, 155-159
Black-bellied Plover, 53, 56
Black-necked Stilt, 44, 54, 70, 76
Black Oyster-catcher, 53
Black Rail, 14
Blue-faced Booby, 20, 84-85, 87, 98
384 CALIFORNIA ACADEMY OF SCIENCES
Blue-footed Booby, 44, 88, 89, 90, 91, 92,
93-97, 109
Blue-winged Teal, 76, 79-80
Booby, Blue-faced, 20, 84-85, 87, 98
Blue-footed, 44, 88, 89, 90, 91, 92,
93-97, 109
Brewster’s, 20, 32, 85, 87, 97-100
Neboux’s, 93
Peruvian, 36, 87, 89-93, 95, 97, 101
Red-footed, 85-89, 93
“Boston Eagle,” 244, 316
Boulenger, 136, 254
Brewster, 47
Brewster’s Booby, 20, 32, 85, 87, 97-100
brewsteri, Sula, 97-100, 117
Brilliant Teal, 79
Brown, Arthur E., 247
Brown Pelican, 25, 44, 107-110
Bruce, 207
Bulimulus cymatias, 381
(Nesiotus) adelphus, 379
akamatus, 378
albemarlensis, 377-378
alethorhytidus, 379-388
cucullinus, 377
cymatias, 380, 381
elezodes, 376
hemzrodes, 376
jervisensis, 381
lycodus, 379
ochsneri, 380-381
perrus, 376-377
rabidensis, 381-382
sculpturatus, 381
tortuganus, 377
Buller, 18
Bursera, 102
Butorides sundevalli, 62-65, 116, 122
(pl. 2)
virescens, 65-66
Bynoe, 222, 225
c
Calidris arenaria, 56
californiana, Testudo, 244, 245, 316
Camarhynchus, 229
Canvasback, 80
Cereus, 301, 326
Certhidia, 229
“Challenger,”’ 228
Chamepelia passerina, 9
Chapman, 66 (foot), 68 (foot), 71, 76
Charles Island Lizard, 164-168
Tortoise, 316-318
Chatham Island Lizard, 154, 155-159
Tortoise, 323-328, 338
chathamensis, Testudo, 244, 259, 290,
294, 323-328
chlororhynchus, Puffinus, 98
[Proc. 4ru Sea.
Clipperton, 211
Noddy, 20, 29-32, 98, 103
clypeata, Spatula, 80
Cochrane, 226
Colnett, Capt. James, 212
(Conolophus) demarlii, Hypsilophus, 188
Conolophus pallidus, 133, 188, 190-192
subcristatus, 133, 188-190, 191
subcristatus pictus, 188
Cooke, 210
Cookson, 136, 226, 228, 253, 254, 296
Cope, 136, 155
Cormorant, Flightless, 44, 80-84
Cowley, 210
Cowley Mountain Tortoise, 362-365
Craniopeltis bivittata, 135, 136, 155
Grayii, 135, 164, 172
(Craniopeltis) Grayii, Tropidurus, 136,
155, 164, 172
pacificus, Tropidurus, 135, 143
Creagrus furcatus, 35-42
Creciscus jamaicensis, 14
sharpei, 12, 13
spilonotus, 5, 12-16, 112
crepidatus, Stercorarius, 46
cristatus, Amblyrhynchus, 133, 192-194
ater, Amblyrhynchus, 192
Hypsilophus (Amblyrhynchus),
192
Iguana (Amblyrhynchus), 192
nanus, Amblyrhynchus, 192
Oreocephalus, 192
Crymophilus fulicarius, 57
cucullinus, Bulimulus (Nesiotus), 377
Curlew, Hudsonian, 51, 54-55, 56
cyanops, Sula, 84-85, 92, 93, 117
cymatias, Bulimulus (Nezsiotus), 388,
381
Cyperus, 222
D
Dafila acuta, 80
Dall, William Healey, Preliminary de-
scriptions of new species of Pul-
monata of the Galapagos Islands,
375 -382
Dampier, 210
Dark-rumped Petrel, 36, 98
Darwin, 135, 164, 220
darwini, Testudo, 244, 259, 290, 293, 294,
319-323, 348, 353
Davis, Edward, 210
De Beauchesne, 211
De Berlanga, Fray Tomas, 209
De Freycinet, 244, 316
Delano, Amasa, 135, 212
delanonis, Tropidurus, 133, 136, 137, 139,
142, 159-164
demarlii, Amblyrhynchus, 188
Hypsilophus (Conolophus), 188
Vor. II, Pr. 1]
diamesus, Micranous, 29-32, 113
Diemictylus, 194
discors, Querquedula, 79-80
Dove, Galapagos, 6-11
Mourning, 9
Passerine, 9
Downes, Commodore John, 220, 255, 316
Drowne, F. P., 228, 229
Dumeril, 135
Dumeril and Bibron, 249
Duncan Island Lizard, 147-150
Tortoise, 306-312
duncanensis, Tropidurus, 133, 1%, 137,
138, 139, 143, 147-150
Dusky Shearwater, 44, 91, 93, 110
Dwight, 5, 41, 45
E
Egret, 44, 58, 59, 76
egretta, Herodias, 59, 115
elzodes, Bulimulus (Nzsiotus), 376
elephantina, Testudo, 354
elephantopus, Testudo, 244, 245-249, 255,
256, 259, 292, 316-318, 335 (as syno-
nym), 354 (as synonym)
ephippium, Testudo, 234, 244, 251-252,
259, 291, 293, 298, 306-312
Ereunetes pusillus, 56
“Eugenie,” 79, 135, 226
Evans, Whitton, 245
F
Fisher, 100
Fitzroy, 228
Flamingo, 54, 58
American, 66-76
Flightless Cormorant, 44, 80-84
Florida Gallinule, 16
forsteri, Sterna, 41
Franklin’s Gull, 42
franklini, Larus, 42
Frazar’s Oyster-catcher, 47-53, 58
frazari, Hematopus, 47
Fregata aquila, 100-104, 130 (pl. 6), 132
(pl. 7)
fulicarius, Crymophilus, 57
fuliginosa, Sterna, 19-24, 41
fuliginosus, Larus, 42-46
Fuligula vallisneria, 80
furcatus, Creagrus, 35-42
fuscus, Pelecanus, 107-110, 118
G
Gadow, 257
gadowi, Testudo, 257
Gaimard, and Quoy, 244, 245
galapagana, Williamia, 382
galapagensis, Hematopus, 47-53, 114
385
Galapagoan lizards of the genus Tropi-
durus; with notes on the Iguanas of
the genera Conolophus and Ambly-
rhynchus, by John Van Denburgh
and Joseph R. Slevin, 133-202.
galapagoensis, Nesopelia, 5, 6-11, 111
Porzana, 12
Testudo, 244, 249, 255-256, 257,
292, 316
Galapagos Albatross, 91
Dove, 6-11
Hawk, 36, 52, 91, 108
Heron, 44, 59, 60, 62-65, 76
Lizard, 172-188
Penguin, 16-19, 81
Rail, 9, 12-16
galeata, Gallinula, 5, 16
Galliformes, 5
Gallinula galeata, 5, 16
Gallinule, Florida, 16
Geospiza, 229
Gifford, Edward Winslow, Birds of the
Galapagos Islands, with observations
on the birds of Cocos and Clipperton
islands (Columbiformes to Pelecani-
formes), 1-132
Gigantic land tortoises of the Galapagos
Archipelago, by John Van Denburgh,
203-374
glaucescens, Larus, 43
Glaucous-winged Gulls, 43
Graceful Petrel, 44, 93, 100
Gray, 223
grayi barringtonensis, Tropidurus, 137,
168
grayi, Tropidurus, 137, 164, 172
Holotropis, 172
Liocephalus, 172
magnus, Tropidurus, 137, 138, 172
Tropidurus, 136, 147, 155-159, 172
grayi, 137, 164, 172
grayii, Craniopeltis, 135, 164, 172
Holotropis, 135, 164
Leiocephalus, 135, 136, 155, 164
Liocephalus, 136
Tropidurus, 133, 136, 137, 139, 142,
164-168
(Craniopeltis), 136, 155, 164
Great Blue Heron, 58-59, 69
Green, G. M., 76
Green Heron, 65-66
Grinnell, Joseph, 61
Gull, Franklin’s, 42
Glaucous-winged, 43
Sooty, 42-46, 76, 93
Swallow-tailed, 35-42, 106
Giinther, 136, 206, 210, 227, 245, 246, 248,
249, 250, 251, 252, 253, 254, 256, 290,
292, 317, 329
386 CALIFORNIA ACADEMY OF SCIENCES
gtintheri, Testudo, 244, 246, 253, 256-
257, 259, 260, 289, 291, 295, 325, 332,
335-343, 344, 348
Gygis alba, 32-34
H
Habel, 135, 143, 151, 226
habeli, Tropidurus, 137
habelii, Tropidurus, 133, 136, 137, 139,
142, 150-154
(Habelii), Tropidurus pacificus, 136, 150
Hematopus frazari, 47
galapagensis, 47-53, 114
niger, 53
Hall, Capt. Basil, 219, 251, 252
Harlan, Richard, 245, 246, 247, 248, 249,
255, 256
Harris, 210, 228, 229, 230, 231
harrisi, Nannopterum, 80-84, 126 (pL 4)
Hartert (and Rothschild), 7, 18, 35, 38,
42, 55, 58, 96
“Hassler,” 135
Hassler Expedition, 226
hawaiiensis, Micranous, 31
Hawk, Galapagos, 36, 52, 77, 91, 108
heermanni, Larus, 45
Helicina (Idesa) ochsneri, 382
nesiotica, 382
Heller, 134, 137, 146, 150, 154, 163, 172,
234, 368
Heller (and Snodgrass), 4, 7, 30, 31, 33,
42, 58, 76, 82, 86
Helleri, Opuntia, 7
Helodromas solitarius, 55
helvetica, Squatarola, 53
hemezrodes, Bulimulus (Nzsiotus), 376
“Herald,” 226
Hernandez, Col., 220
herodias, Ardea, 58-59, 114
Herodias egretta, 59, 115
Heron, Galapagos, 44, 59, 60, 62-65, 76
Great Blue, 58-59, 69
Green, 65-66
Yellow-crowned Night, 59-62
Heteractitis incanus, 55-56
Heteropygia bairdi, 57
Himantopus mexicanus, 54, 120 (pl. 1)
Hippomane mancinella, 334
Hippopotamus, 207
Holotropis grayi, 172
Grayii, 135, 164
Hood Island Lizard, 159-164
* Tortoise, 313-316
hoodensis, Testudo, 244, 259, 293, 313-316
Tropidurus, 136, 138, 159
Hopkins-Stanford Galapagos Expedi-
tion, 137
Hudsonian Curlew, 51, 54-55, 56
hudsonicus, Numenius, 54-55
(Proc. ¢ra Ser.
Hull, 24, 33, 228, 229, 230, 231, 232, 233
Hydrochelidon nigra, 41
Hydrometridz, 37
hyperboreus, Phalaropus, 57
Hypsilophus (Amblyrhynchus) ater, 192
cristatus, 192
(Conolophus) demarlii, 188
I
(Idesa) ochsneri, Helicina, 382
Iguana, Barrington Island Land, 190-
192
Land, 188-190
Sea, 192-194
Iguana Cove Tortoise, 344-350
Iguana (Amblyrhynchus) ater, 192
cristatus, 192
incanus, Heteractitis, 55-56
Indefatigable Island Tortoise, 354-362
indefatigabilis, Tropidurus, 136, 137, 138,
172
indica, Testudo, 223, 316, 354
insularis, Tillandsia, 9
interpres, Arenaria, 46-47
J
Jackson, J. B., 255, 256
Jacobii, Tropidurus, 137, 138, 172
Jaeger, Parasitic, 46
Pomarine, 46
Jahnke, Herman, 231
jamaicensis, Creciscus, 14
James Island Tortoise, 319-323, 348
Jervis Island Tortoise, 351-353
jervisensis, Bulimulus (Nzsiotus), 381
“Julia E. Whalen,” 234
K
Kinberg, 79, 135, 155, 164, 226
Knight, 210
L
Land Iguana, 188-190
Barrington Island, 190-192
Lariformes, 5
Larus franklini, 42
fuliginosus, 42-46
glaucescens, 43
heermanni, 45
occidentalis, 40
Lawson, 222, 223
Least Sandpiper, 56
Leiocephalus, 139
Grayii, 135, 136, 155, 164
lemniscatus, Tropidurus, 136, 137, 138,
155
Levick, Capt., 366
Vor. II, Pr. 1]
“Lila and Mattie,” 228
Limonites minutilla, 56
Linbridge, 228
Liocephalus grayi, 172
Grayii, 136
pacificus, 136, 143, 151
Lizard, Abingdon Island, 143-147
Barrington Island, 168-172
Bindloe Island, 150-154, 159
Charles Island, 164-168
Chatham Island, 154, 155-159
Duncan Island, 147-150
Galapagos, 172-188
Hood Island, 159-164
Loomis, Leverett Mills, 1, 4, 6
lycodus, Bulimulus (Nzsiotus), 379
M
macularius, Tringoides, 56
“maculirostris, Anas,”’ 79
magnus, Tropidurus grayi, 137, 138,
mancinella, Hippomane, 334
Man-o’-war Bird, 21, 30, 36, 44, 87, 91,
100-104, 105, 109
Mareca Americana, 80
“Mary Sacks,” 237
Maytenus, 189
Meek, 244, 316
Megadyptes antipodum, 18
mendiculus, Spheniscus, 5, 16-19, 112, 120
(pL 1)
mexicanus, Himantopus, 54, 120 (pl. 1)
Micranous diamesus, 29-32, 113
hawaiiensis, 31
microphyes, Testudo, 234, 244, 252-253,
259, 290, 291, 294, 325, 329-344, 348
minutilla, Limonites, 56
Morrell, Capt. Benjamin, 219
Mourning Dove, 9
Myiarchus, 229
_
“NI
cs)
N
(Nesiotus) adelphus, Bulimulus, 379
akamatus, Bulimulus, 378
albemarlensis, Bulimulus, 377-378
alethorhytidus, Bulimulus, 379-
380
cucullinus, Bulimulus, 377
cymatias, Bulimulus, 380
elzodes, Bulimulus, 376
hemerodes, Bulimulus, 376
jervisensis, Bulimulus, 381
lycodus, Bulimulus, 379
ochsneri, Bulimulus, 380-381
perrus, Bulimulus, 376-377
rabidensis, Bulimulus, 381-382
Nannopterum harrisi, 80-84, 126 (pl. 4)
nanus, Amblyrhynchus cristatus, 192
Narborough Island Tortoise, 299-302
Neboux’s Booby, 93, 97
nebouxi, Sula, 93-97, 128 (pL 5)
nesiotica, Helicina, 382
Nesomimus, 163
Nesopelia galapagoensis, 5, 6-11, 111
niger, Hematopus, 53
Night Heron, Yellow-crowned, 59-62
nigra, Hydrochelidon, 41
Testudo, 223, 244, 245, 316, 335
nigrita, Testudo, 244, 249-251, 344, 354
Noddy, 17, 20, 24-29, 30, 32, 98
Clipperton, 20, 29-32, 98, 103, 109
North Albemarle Island Tortoise, 303-
305
Northern Phalarope, 57
Noyes, 237
Numenius hudsonicus, 54-55
Nyctanassa violacea, 59-62, 115, 122
(pl. 2)
Oo
Oates, 93
occidentalis, Larus, 40
ochsneri, Bulimulus (Nzsiotus), 380-381
Helicina (Idesa), 382
Ochthodromus wilsoni, 53
Opuntia, 8, 234, 301, 326, 333
Helleri, 7
Oreocephalus cristatus, 192
Osprey, 33, 193
Oyster-catcher, Black, 53
Frazar’s, 47-53, 58
P
pacificus, Liocephalus, 136, 143, 151
Tropidurus, 133, 136, 137, 138, 139,
143-147, 151
pallidus, Conolophus, 133, 188, 190-192
Parasitic Jaeger, 46
Parker, J. J., 2
Passerina, Chamzpelia, 9
Passerine Dove, 9
Pelecanus fuscus, 107-110, 118
Pelican, Brown, 25, 44, 107-110
Penguin, Galapagos, 16-19, 81
Yellow-crowned, 18
perrus, Bulimulus (Nzsiotus), 376-377
Peruvian Booby, 36, 87, 89-93, 95, 97, 101
“Peterel,” 136, 226, 228
Peters, 135, 155
Petrel, Dark-rumped, 36, 98
Graceful, 44, 93, 100
Phaethon zthereus, 104-107
rubricaudus, 107
Phalarope, Northern, 57
Red, 57
Wilson's, 57-58
Phalaropus hyperboreus, 57
phantastica, Testudo, 259, 293, 299-302
phantasticus, Testudo, 4, 244, 299
Pheenicopteriformes, 5
2
Pheenicopterus ruber, 66-76, 124 (pl. 3)
‘“‘Physicien,” 244, 316
pictus, Conolophus subcristatus, 188
pilosum, Amblyoma, 235
Pintail, 80
Bahama, 44, 69, 70, 76-78, 79, 80
piscatrix, Sula, 85-89, 128 (pl. 5)
Pizarro, 209
planiceps, Testudo, 244, 251, 354
plicata, Usnea, 224
Plover, Black-bellied, 53, 56
Semipalmated, 53, 56
Wilson’s, 53
Peecilonetta bahamensis, 76-78
Pomarine Jaeger, 46
pomatorhinus, Stercorarius, 46
Porter, 215, 216, 218, 219, 223, 242, 248,
251, 257, 322
porteri, Testudo, 244, 250, 251, 259, 294,
354-362, 364
Porzana galapagoensis, 12
“Potomac,” 220, 255
Preliminary descriptions of new species
of Pulmonata of the Galapagos
Islands, by William Healey Dall,
375-382
Procellariiformes, 5
Puffinus chlororhynchus, 98
pusillus, Ereunetes, 56
Pyrocephalus, 229
Q
Querquedula discors, 79-80
versicolor, 79
Quoy and Gaimard, 244, 245
R
rabidensis, Bulimulus (Nzsiotus), 381-
382
Rail, Black, 14
Galapagos, 9, 12-16
Red Phalarope, 57
Red-billed Tropic Bird, 104-107
Red-footed Booby, 85-89, 93
Red-tailed Tropic-bird, 107
Reynolds, 255
Ridgway, 6, 9, 37, 47, 64
Rogers, Woodes, 211, 226
Rothschild, 228, 237, 238, 244, 245, 246,
254, 257, 258, 313, 323
Rothschild and Hartert, 7, 18, 35, 38, 42,
55, 58, 96
tuber, Phcenicopterus, 66-76, 124 (pl. 3)
rubricaudus, Phaethon, 107
s
sabinii, Xema, 37
Sanderling, 56
388 CALIFORNIA ACADEMY OF SCIENCES
[Proc. 47H Ser.
Sandpiper, Baird’s, 57
Least, 56
Semipalmated, 56
Solitary, 55
Spotted, 56
Saunders, Howard, 19, 22, 37, 40
Scalesia, 190
sculpturatus, Bulimulus, 381
Sea Iguana, 192-194
Seemann, B., 226
semipalmata, Symphemia, 55
Semipalmated Plover, 53, 56
Sandpiper, 56
semipalmatus, AEgialeus, 53
Sesuvium, 101
Sharpe, 4
sharpei, Creciscus, 12, 13
Shearwater, Dusky, 44, 91, 93, 110
Wedge-tailed, 98
Shoveller, 80
Slevin, Joseph R., with John Van Den-
burgh, Galapagoan lizards of the
genus Tropidurus; with notes on
the iguanas of the genera Cono-
lophus and Amblyrhynchus, 133-202
Snodgrass, 234
Snodgrass and Heller, 4, 7, 30, 31, 33, 42,
58, 76, 82, 86
solitarius, Helodromas, 55
Solitary Sandpiper, 55
Sooty Gull, 42-46, 76, 93
Tern, 19-24, 25, 26, 32, 98
Spatula clypeata, 80
Spheniscus mendiculus, 5, 16-19, 112,
120 (pl. 1)
spilonotus, Creciscus, 5, 12-16, 112
Spotted Sandpiper, 56
Squatarola helvetica, 53
Steganopus tricolor, 57-58
Steindachner, 135, 136, 143
Stercorarius crepidatus, 46
pomatorhinus, 46
Sterna antillarum, 41
forsteri, 41
fuliginosa, 19-24, 41
Stilt, Black-necked, 44, 54, 70, 76
stolidus, Anous, 24-29, 41, 113
Stone, 247
Stratton, 211
subcristatus, Amblyrhynchus, 188
Conolophus, 133, 188-190, 191
pictus, Conolophus, 188
subcristatus, Trachycephalus, 188
Sula brewsteri, 97-100, 117
cyanops, 84-85, 92, 93, 117
nebouxi, 93-97, 128 (pl. 5)
piscatrix, 85-89, 128 (pl. 5)
variegata, 89-93, 9, 117
Sundevall, 79
Vor. II, Pr. 1]
sundevalli, Butorides, 62-65, 116, 122
(pl. 2)
Swallow-tailed Gull, 35-42, 106
Symphemia semipalmata, 55
iT;
Tagus Cove Tortoise, 329-334
Tattler, Wandering, 52, 55-56
Teal, Blue-winged, 76, 79-80
Brilliant, 79
Tern, Sooty, 19-24, 25, 26, 32, 98
White, 32-34
Testudo abingdoni, 259, 290, 293, 296-299
abingdonii, 244, 296, 306
becki, 237, 244, 259, 292, 293, 298,
301, 303-305, 317
bedsi, 303
californiana, 244, 245, 316
chathamensis, 244, 259, 290, 294,
323-328
darwini, 244, 259, 290, 293, 294,
319-323, 348, 353
elephantina, 354
elephantopus, 244, 245-249, 255,
256, 259, 292, 316-318, 335 (as
synonym), 344 (as synonym),
354 (as synonym)
ephippium, 234, 244, 251-252, 259,
291, 293, 298, 306-312
gadowi, 257
galapagoensis, 244, 249, 255-256,
257, 292, 316
giintheri, 244, 246, 253, 256-257,
259, 260, 289, 291, 295, 325,
332, 335-343, 344, 348 :
hoodensis, 244, 259, 293, 313-316
indica, 316, 354
Indica, 223
microphyes, 234, 244, 252-253, 259,
290, 291, 294, 325, 329-334, 348
nigra, 244, 245, 316, 335
nigrita, 244, 249-251, 344, 354
phantastica, 259, 293, 299-302
phantasticus, 4, 244, 249
planiceps, 244, 251, 354
porteri, 244, 250, 251, 259, 294, 354-
362, 364
sp. (Barrington), 259, 365-366
sp. (Cowley Mountain, Albe-
marle), 259, 294, 362-365
vicina, 234, 239, 244, 245, 246, 253-
255, 256, 257, 258, 259, 291, 295,
321, 338, 344-350, 353, 354, 364
wallacei, 244, 257-258, 259, 295,
351-353
Tillandsia insularis, 9
Tortoise, Abingdon Island, 296-299
Barrington Island, 365-366
INDEX
389
Tortoise, Charles Island, 316-318
Chatham Island, 323-328, 338
Cowley Mountain, 362-365
Duncan Island, 306-312
Hood Island, 313-316
Iguana Cove, 344-350
Indefatigable Island, 354-362
James Island, 319-323, 348
Jervis Island, 351-353
Narborough Island, 299-302
North Albemarle Island, 303-305
Tagus Cove, 329-334, 338, 348
Vilamil Mountain, 335-343
tortuganus, Bulimulus, 377
Trachycephalus subcristatus, 188
Traquair, 251, 252
tricolor, Steganopus, 57-58
Tringoides macularius, 56
Tropic-bird, Red-billed, 104-107
Red-tailed, 107
Tropidunrus, 317, 325, 368
abingdonensis, 136, 138
abingdonii, 136, 143
albemarlensis, 133, 136, 137, 139,
143, 168, 172-188
barringtonensis, 133, 139, 143,
168-172
barringtonensis, 137, 138, 168
bivittatus, 133, 137, 138, 139, 142,
155-159
(Craniopeltis) grayii, 155, 164, 172
pacificus, 143
delanonis, 133, 136, 137, 139, 142,
159-164
duncanensis, 133, 136, 137, 138,
139, 143, 147-150
grayi, 136, 147, 155, 159, 172
barringtonensis, 137, 168
grayi grayi, 137, 164, 172
magnus, 137, 138, 172
grayii, 133, 136, 137, 139, 142, 155,
164-168, 172
habeli, 137
habelii, 133, 136, 137, 139, 142,
150-154
hoodensis, 136, 138, 159
indefatigabilis, 136, 137, 138, 172
jacobii, 137, 138, 172
lemniscatus, 136, 137, 138, 155
pacificus, 133, 135, 136, 137, 138,
139, 143-147, 151
(Habelii), 136, 150
Turnstone, 46-47, 53
“Uranie,”” 244, 316
Usnea plicata, 224
390 CALIFORNIA ACADEMY OF SCIENCES
Vv
vallisneria, Fuligula, 80
Vancouver, 211
Van Denburgh, John, The gigantic land
tortoises of the Galapagos Archipel-
ago, 203-374
Van Denburgh, John, and Joseph R.
Slevin, Galapagoan lizards of the
genus Tropidurus; with notes on the
iguanas of the genera Conolophus
and Amblyrhynchus, 133-202
Van Lidth de Jeude, 291
variegata, Sula, 89-93, 96, 117
“Venus,” 135, 226
versicolor, Querquedula, 79
vicina, Testudo, 234, 239, 244, 245, 246,
253-255, 256, 257, 258, 259, 291, 295,
321, 338, 344-350, 353, 354, 364
Vilamil, J., 219, 220
Vilamil Mountain Tortoise, 335-343
violacea, Nyctanassa, 59-62, 115, 122
(pl. 2)
virescens, Butorides, 65-66
[Proc. 47H Sen.
Ww
Wafer, 210
wallacei, Testudo, 244, 257-258, 259, 295,
351-353
Wandering Tattler, 52, 55-56
Watkins, Patrick, 219
Webster, Frank B., 228, 237
Webster-Harris Expedition, 43, 57
Wedge-tailed Shearwater, 98
White, J. W., 2
White Tern, 32-34
Willet, 55
Williamia galapagana, 382
Wilson’s Phalarope, 57-58
Plover, 53
wilsoni, Ochthodromus, 53
Wood, 226
x
Xema sabinii, 37
ig
Yellow-crowned Night Heron, 59-62
Penguin, 18
Yupangi, Tupac, 209
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