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{From the Proceedings of the Academy of Natural Sciences, July, 1855. }

Descriptions of some new Marine Invertebrata. By Wm. Stimpson, Zoologist to the
U. S. Surveying Expedition to North Pacific, Japan Seas, etc., under direction of
Commander C. Ringgold, U. S. N.

(Communicated by the Smithsonian Institution.)

ECHINODERMATA.

i. QpHioTHRIxX SPoNGIcoLA. Disk covered with short spines, except on the
large triangular plates at the bases of the arms; the sides with scattered, mi-
nute spines; the interbrachial plates below subrhombic in shape. Arms in
length seven times the diameter of the disk, broad near their origins but very
slender at their extremities ; lateral spines six in each row, the upper ones being
largest, subclavate, with rounded extremities, compressed and distantly serrated.
The spines near the extremities of the arms are, however, generally pointed.
Disk reddish, with black spots symmetrically arranged; arms red, broadly annu-
late with black; spines pale brownish. . Diameter, 4 inches. Found among
soft sponges in the circumlittoral zone. 5

Hab. Australia, at Port Jackson.

2. OPHIOTHRIX PLaNULATA. Disk and arms much depressed; the latter in
length ten times the width of the former. Disk small, smooth and glossy above;
arm-plates broadly triangular, separated from each other by a row of the small
plates with which the rest of the disk is covered. Below, the sides of the disk,
between the arms, are soft and covered with short spines; the interbrachial
plates subrhombic, but not very distinct. The mouth-fissures have each two
large suckers, but no papille on their sides. Arms suddenly tapering at the
middle; their superior plates trapezoidal and minutely granulated; lateral
spines five in each row, the middle ones largest, compressed, with blunt extremi-
ties, longitudinally striated, and denticulated on their edges. Disk dark green-
ish; arms colored with red and light brown alternately: below white. Taken
in fifteen fathoms among dead corals, on “Groper Shoal,” in S. Lat., 20° H. Lon,
160}.

3. OPHIOLEPIS PERPLEXUS. Arms filiform, in length about seventeen times the
diameter of the disk. Dorsal surface of the disk covered with small scales, the
arm-plates of each pair being elongated, very narrow, broadest exteriorly, and
including a triangular space between them; ventral surface with the inter-
brachial plates broader than long ; mouth with a pair of large scale-like papillz
at the summit of each projecting angle, and a pair at the base of each fissure.
Lateral spines of the arms five in number in each row, short, thick, and pointed.
Disk above dark greyish ; arms purplish-brown, darker and lighter alternately ;
below reddish. The disk is very soft and is always cast by the animal when
caught; the slender arms then twisting together in all directions. Found in the
circumlittoral zone in mud.

Had. Australia, at Port Jackson.

%

ers small, uniform y distributed over the whole surface. Anus with five cal-«
careous papilla. Tentacula much branched, ten in number, two of which are
much smaller than te*rést. * The oral column is the most remarkable feature in
this species, it being about one-half as long as the body, and consisting of a
flexible calcareous cylinder, contorted below, and sending ten short spurs of
points upward, and five pairs of long twisted ones downward. Its flexibility is
owing to the circumstance that its calcareous matter is deposited in the form of
irregular plates connected by softer parts. The inferior spurs thus seem jointed.
Length, 2 inches; breadth, 0.35 inches. Taken near low water mark, under
stones.
Hab. Australia, at Port Jackson.

Ne @ *. . ° 4
4, THYONE RU GALS. : Subfusiform, of a brownish-grey color, with the sucks

5. Cutropota AuUSTRALIANA. Small, and very slender; surface covered with
papille of two kinds; the smaller and less couspicuous of which are spread
everywhere, and consist of accumulations of spicule, which are hooked at one
extremity and slightly bent at the other. The larger kind are scattered, quite
thickly, along one side of the body only; and are prominent, circular, white, |
calcareous, varying in size from 1-40th to 1-20th of an inch in diameter ; they
are composed of accumulations of minute, six-spoked wheels. The tentacula
are ten in number, each having ten serrulated digitations, placed on the outer
and the lateral margins of a sort of disk, which forms the anterior half of the
inner side of the tentacle. Color, pale.yellowisk. Length, 2 inches; breadth,
0.2 inch. Found under stones, near low-water mark.

Hab. Australia, at Port Jackson.

6. SYNAPTA DOLABRIFERA. Slender, but rather short, of a dirty yellowish co-
lor; skin very thickly provided with hook-bearing plates, which have usually
about ten perforations, the middle ones largest. The hamule are a little larger
than the plates, pickaxe-shaped, with the extremity of the handle also provided
with a double hook, though of very small size. Tentacula twelve, digitate
nearly to their bases; digitations short, about fourteen in number to each ten-
tacle. Length 2inches. Found under stones, near low-water mark.

Hab. Australia, at Fort Jackson.

TUNICATA.

7. CYNTHIA ANGULARIS. Small, elongated, with a small base, and seven or
eight longitudinal ridges; test coriaceous, nearly smooth between the ridges,
of a pale yellowish color; apertures square, at the extremities of short tubes
which are placed close together at the extremity of the body; each tube with
four longitudinal reddish bands corresponding to the angles. Length, 1 inch;
breadth, 0.3inch. On sea-weeds in the circumlittoral zone.

Hab. Cape of Good Hope, at Simon’s Bay.

8. CYNTHIA L&vissimA. Egg-shaped; test very thick, of a pale orange
color, very smooth and glossy; apertures small, red. Branchial sac with about
20 folds, and with twenty elongated, fimbriated tentacles at its apertures. Some
of these tentacles, as is usually the case in this genus, are much smaller than
the others. Length 1 inch. Found under stones in the lower part of the littc-
ral zone.

Hab. Australia, at Port Jackson.

9. CyNTHIA saBuLOsSA. Rounded, laterally compressed, usually attached by
one or more short stalks. Test strong and hard, but not very thick; surface
covered with sandy particles, which adhere so strongly as to form part of its
substance. Apertures on slight prominences, the branchial largest and dotted
with black. Branchial folds eight in number, narrower than their interspaces.
Branchial tentacles simple, filamentary, long and very numerous. Diameter 1
inch. Found in the circumlittoral zone, on muddy bottoms.

Hab. Australia, at Port Jackson.

10. CynrurA pumosa. Globular, of a yellowish-brown color; surface villous,
and provided with numerous stout, sub-conical processes of the test, which have
short irregular branches. Apertures cross-shaped when contracted; the bran-
chial more than twice the size of the anal. Branchial sac with twelve very
large folds, which are much broader than their interspaces. Tentacula also
twelve in number, including four or five small ones; biserrate, folded longitudi-
nally, and curved so as to present their pinne toward the branchial cavity. Di-
ameter 1 inch. Found in the circumlittoral zone, on muddy bottoms.

Hub. Australia, at Port Jackson.

11. Moneuna inconspicua. Small, free, bullet-shaped; test thin, brittle, with
a thin but solid coating of sand; apertures clear, transparent white; the
branchial six-rayed ; the anal with four well-marked lobes. Branchial sac with
eight folds equalling their interspaces in width. Diameter, half an inch,
Found in the circumlittoral zone, on sandy bottoms.

Hab. Australia, at Port Jackson.

12. AScIDIA SYDNEIENSI3. Gregarious, several specimens growing together in
one mass. Test irregular in shape, thin, often translucent, of a pale purplish
color. Apertures on long tubes, which are marked with longitudinal ridges
corresponding in number with the rays of the apertures; the branchial having
seven, the anal six rays. Branchial sac finely reticulated, the transverse threads
much less prominent than the longitudinal ones. Tentacula simple, thread-like,
about one hundred in number, curved and projecting into the cavity so as to
form a dome-like filter for the water as it enters the branchial sac. Length 14
inches. Found near low-water mark, among rocks.

Hab. Australia, at Port Jackson.

13. Ascip1a succipa. Test thick, cartilaginous, juicy, irregularly lobed, espe-
cially near the apertures, which are sessile, rather large, valvate, and difficult to
detect in the contracted specimen. Branchial sac reticulated, the reticulations
sharply projecting, the transverse stric, being as prominent as the longitudinal
ones, which are about ninety in number. Tentacles simple, filamentary, dis-
tantly arranged around the entrance of the sac, and only twenty in number.
Color of the posterior part of the body purplish; the rest much paler; aper-
tures ferruginous. Length 13 inches. Found near low-water mark, among
stones. -

Hab. Australia, at Port Jackson.

NUDIBRANCHIATA.

14. Hous cacaotica. Slender, tapering posteriorly to a fine point; of a clear
pale rose color on the body above, and on the anterior margin of the foot. Ten-
tacula rather short, rose-colored; the orals a little the longest; dorsals tipped
with white, and having a ring of white at the base; eyes large and conspicuous
Branchiz of a dark chocolate color, compressed, tipped with white; arranged
in eight or ten clusters, and placed on the sides of the body, anteriorly, leaving
much of the back bare; more numerous and crowded posteriorly so that the
clusters become indistinct. Length 14 inches. Found under stones, in the lit-
toral zone.

Hab. Australia, at Port Jackson.

15. TRrivonta PALLIDA. Truncate in front, tapering gradually behind; ofa
transparent white color, with a few flake-white spots on the back; oral veil
large, with eight elongated digitations, four on each side; tentacles rather long,
with their sheaths having waved edges, and the flaments around the truncated
extremity of a dark brownish color. Branchie small, margined with flake-
white, extending in a line on each side along the upper edges of the body; the
more conspicuous tufts being sixteen in number, having smaller ones between
them. A white line extends below and parallel to the branchiz, on the sides of

he body. Length, 1 inch; breadth, 0.25 inch. On rocky bottoms, in the

coralline zone.
Hab. False Bay, Cape of Good Hope.

16. TriopA tLucipa. Depressed, broadest anteriorly; clavate appendages
constricted at their bases, in number about forty, numerous and small in size at
the head, the posterior ones largest. Tentacula long, with about twelve lami-
ne. Infront of each tentacle, near the margin, stands a clavate process much
longer than the others. Branchiz consisting of three plumes, about equal in
size. Color uniform transparent white, except that the tentacula, branchiz, and
appendages are all of a yellowish color towards their extremities. The tips of
the clave appear open or hollow from their transparency. Length, 0.8 inch.
Found under stones, at low-water mark.

Hab. Cape of Good Hope, at Simon’s Bay.

17. Gontoporis? onscura. Oblong, quadrilateral; cloak broad, widely projec-
ting so as to conceal the oral tentacles anteriorly, and tapering from opposite
the branchiz, to a blunt point behind, disclosing the foot, which extends further
to a distance of one-fourth the length of the body. Dorsal tentacule elonga-
ted, retractile, smooth and glossy to appearance, but having from twelve to four-
teen laminz. Branchiz retractile, consisting of twelve elongated, simply-pin-
nate leaflets, which form acup around the anus. Color a dark greenish, or
yellowish grey, with numerous black and yellow dots; arow of black spots is
conspicuous, margining both the mantie and the foot. Head and oral tentacles
bluish-grey. Dorsal tentacles with red tips. Length, 1} inches; breadth, 0.3
inch. Found among soft sponges in the circumlittoral zone.

Hab. Australia, at Port Jackson.

This species, with another closely allied and occurring in the same locality
form a genus probably new. It differs from Gontodorus, in having retractile ten-
tacula, and in the greater development ‘of the mantle; and from Doris by the
elevated, oblong, quadrangular shape of the body. I would propose for it the
name of Hypselodoris.

18. Doris optusa. Body very convex above; of a pale yellowish color, with
brownish spots; mantle covered with minute crowned tubercles. Tentacula
short, of a purplish brown color, with five transverse Jamine at their tips,
where they are broadly and obliquely truncated. Branchie cousisting of a
crown of eight short, simply pinnate leaflets. Length, 0.35 inch. Found
among sponges in the circumlittoral zone. :

ffab. Australia, at Port Jackson.

19. Doris ExXcAvaTA. Broad, depressed, of a yellowish color ; mantle widely
expanded, covered with minute, distant, tubercles. Foot broad in front, narrow
behind and projecting a little distance beyond the posterior margin of the man-
tle. Tentacula of a purplish-brown color. Branchiz consisting of five large,
much branched plumes, which are retractile into a large, widely-open Cavity.
Length, 0.7 inch; breadth, 0.4 inch. Found among stones, etc.,in the cir-
cumlittoral zone.

Hab. Australia, at Port Jackson.

TURBELLARIA.

20. LEPTOPLANA PATELLARUM. Large, dilated, depressed, nearly ovate in shape,
broadest behind. Eyes in four clusters; the anterior ones elongated and near-
est each other; the posterior ones rounded and situated on wart-like protube-
rances. Color above dark yellowish, mottled, darkest in the middle; below
white. Length, 0.9 inch: breadth, 0.65 inch. Found under the large lime-
pits which are common on the rocks at half-tide in Simon’s Bay, Cape of Good
Hope.

DIONCUS, n. g. Corpus planum, dilatatum. Caputcorporecontinuum. Os
subcentrale. Ocelli numerosi, in umbones duos claros subdistantes dispositi.
Maricole.

ba

21. Dronovs Bapius. Body half as broad as long, of a reddish-brown color,
above, with a flake-white dust intermixed. Anteriorly there are two colorless,
slightly prominent, circular knobs, which contain, scattered over the whole sur-
face, the very numerous and minute eyes. Below, the body is of a pale sepia
color, except the white digestive organs; and the mouth is placed behind the
centre. - Length, 1.5 inches; breadth, 0.75 inch. Found under stones in the
littoral zone.

Hab. Australia, at Port Jackson.

22. Dioncus optoneus. Oblong-oval, of a pale, transparent, brownish-grey
color above. Eye-clus‘ers two, black, conspicuous, each surrounded by a ring
of white; the few large eye spots béing crowded together at the summit only of
the oculiferous knobs. Length, 1 inch; breadth, 0.35 inches. Found under
stones in the littoral zone.

Hab. Australia, at Port Jackson.

23. Tuysanozoon AusTraLE. Oval, rather broad, of a dark color, mottled
with blackish and brownish above; papille large, about sixty in number, nearly
equal in size on all parts of the body. Eyes numerous, in an oval white patch
between the bases of the tentacula, which is nearly divided in two by a wedge-
shaped clear space entering from behind. Length, 1 inch; breadth, 0.6 inch.
Found on soft sponges in the circumlittoral zone.

Hab. Australia, at Port Jackson.

24, VAaLENCINIA ANNULATA. Hlongated, convex above: head broad, abruptly
truncated in front with a sligbt sinus at the middle, rounded at the sides and
narrowing gradually to the neck. Color purplish-brown, with a pale-yellowish
band across the head, and a narrow white annulation around the body just be-
hind the neck, which is followed by other similar rings at regular distances
throughout the length of the body, to the number of aboutsixteen. A narrow
median dorsal white line, commencing at the head, and two lateral ones, one
on each side, communicating at the neck, also extend throughout. Length, 3
inches; breadth, at the middle, 0.08 inch. On weedy sand in the circumlit-
toral zone.

Hab. Cape of Good Hope, at Simon’s Bay.

25. Potta RHomBoraLis. Convex, largest anteriorly, of a pale reddish color,
with darker sub-margined longitudinal stripes. Head narrower than the body,
rounded in front; neck slightly marked. yes in four clusters ; with four ocelli
in each cluster, arranged at the angles of a diamond-shaped area. The clusters
of the posterior pair are much the smaller, and are placed in the dark spots
forming the commencement of the longitudinal stripes. Length, 1 inch : breadth,
0.05 inch. Found in the littoral zone.

Hab. Australia, at Port Jackson.

26. Potta ariseaA. Hlongated, subcylindrical, of a grey color; head distinct,
subtriangular, much narrower than the body, and separated from it by a well-
marked neck. Eyes in four clusters; two irregular rows on each side of the
head to the number of twenty more ; while on each side of the neck there 1s an
elongated, oblique, reddish spot, with two or three ocelli along its outer edge.
Length, 0.8 inch. Found on sand-flats in the littoral zone.

Hab. Coast of Virginia, at Norfolk.

27. Trrrastemma 1nsicum. Minute, slender, convex, broadest behind the
middle; head with the eyes distinct, and with a lateral fold between the ante-
rior and posterior pairs, and one also behind the posterior pair. Color pale-
brownish. Length, 0.4 inch; breadth, 0.025 inch. On weedy sand in the
circumlittoral zone.

Hab. Cape of Good Hope, at Simon’s Bay.

28. Mecketra ontvacna. Slender, convex above, especially anteriorly where
is also the greatest breadth; head with a longitudinal slit which extends far

1*

down each side, and is covered by a slight vertical notch at the anterior ex-
tremity ; genital opening large, on the lower surface of the neck, just behind
the termination of the lateral slit. Color anteriorly very dark greenish, or oli-
vaceous ; posteriorly a much paler green. Length, 3 inches; breadth, 0.1
inch. Common in sandy bottoms in the circumlittoral zone.

Hab. Cape of Good Hope, at Simon’s Bay.

GEPHYREA.

29. PHascoLosomuM NopULIFERUM. Sub-fusiform. broad, terminating in a
point posteriorly, of a pale brownish color; surface with numerous hard, dark-
brown, large, elevated tubercles, which are uniformly scattered, and extend much
beyond the arms toward the proboscis, around the base of which they become
smaller. Proboscis smooth, except near its extremity, where it is annulated with
narrow, crowded, delicate, black rings, which are seen by means of a magnifyer
to be composed of minute echinulations. Mouth with two clusters of short ten-
tacles or fimbriations, of different lengths. Color pale brown. Length of the
body, 1.15; breadth, 0.4 inch. Under stones in the littoral zone.

Hab. Australia, at Port Jackson.

30. PHascoLosomum sEMicinctumM. Of a light brown color, with bluish re-
flections ; surface very smooth in appearance, but showing, under a magnifyer,
a few minute, black, granulations, distantly scattered. Proboscis very long, an-
nulated with narrow black rings towards the extremity ; mouth with two tufts
of blunt tentacula. Found in holes in coral, etc., in the coralline zone.

Hab. Cape of Good Hope, in False Bay.

In both these species the generative organs are placed one on each side of
the rectum ; their openings externally are indicated by a bluish spot on each
side of, and distant from, the anus.

ANNELIDA.

31. TEcTurELLa LuctaTor. Subquadrilateral, turrited above, of the same
thickness throughout except toward the posterior extremity ; the rings usually
indicated by transverse folds of the envelope which is loose and flabby when the
animal is alive, agglutinating sand, and of a yellowish-green color. Rings
about forty in number. Anterior tentacles capable of being protruded to con-
siderable length, when they are smooth and cylindrical. Posterior tentacles
dark green, slender, and very numerous, in two clusters. Superior sete capil-
lary, as long as the inferior ones, and eight in number in each of the compressed
fascicles which contain them. Inferior pinne containing each a single long
stout hooked seta. Length, 1.5 inch. Found loosely attached under stones
near low-water mark.

Hab. Cape of Good Hope, at Simon’s Bay.

32. SrpHonostomum Lave. Body thickest near the middle, suddenly tapering
and slender posteriorly; much smoother than is usual in the genus, showing
only the delicate, close, slightly-raised annulations. Superior sete capillary ;
inferior ones short, strong, curved, but not hooked. Sete of three segments di-
rected forward ; those of the first in four fan-like clusters, arranged so as to
form a circle around, the mouth; those of the second segment much fewer in
number, and placed on the sides of the body only; those of the third not con-
spicuous. Anterior tentacles long, diverging; posterior ones shorter, slender,
about twenty in number, arranged in a half-circle as in Sabella. Colors: body
pale reddish ; tentacles zonate with white, brownish, and pale green. Length,
2inches; breadth, 0.2 inch. Found in holes which it forms in fragments of
corals, in the coralline zone.

Hab. Cape of Good Hope, at False Bay.

33. CHmtTorTerus capensis. Small, short, having a general resemblance to
C’. pergamentaceus ; inhabiting a papyraceus tube. Annulations about thirty in
number. Cephalic ring equalling in size the succeeding or first ring. In the

first eight rings, the superior pinne only are developed, and are provided with
long lanceolated sete; those of the third pair, however, have a fasciculus of
stout black truncated sete at their bases. Inferior pinne first appearing on the
ninth ring, and provided with short uncinate sete, which have each six or eight
uncine, occupying the whole length of their edges. Dorsal pinne of the tenth
ring expanded into wing-like lobes; ventral pinne united into a transverse disc,
as is also the case on the 11th, 12th and 13th. In the 11th—15th rings the dor-
sal pinne are united to form sacs, of which those of the 14th and 15th are much
the smallest, and compressed above; the ventral shields of these two rings are
compressed, bilobate, and protruded so as to lose the disc-like form. Dorsal
pinne of the 16th and succeeding rings large and finger-shaped, with capillary
sete ;—posteriorly they grow more slender but not much shorter. In these
rings the ventral pinne form four lobes. Length 2 inches. Found in the cir-
cumlittoral zone.
Hab. Cape of Good Hope, at Simon’s Bay.

34. Cua@torrerus LuTEeus. Long and slender, cylindrical, of nearly the same
thickness throughout; color lemon-yellow. Tube thin, membranous within,
exteriorly composed of mud. Rings about forty in number. Ventral shields of
the 14th and 15th rings disc-like as in the others; those of the posterior rings
with the two middle lobes only developed. Dorsal pinnz of the posterior rings
full and lobe-like at the base, but suddenly tapering into a long sheath for their
few capillary sete. Length three inches. Found abundantly on muddy bot-
toms in the circumlittoral zone.

Hab. Australia, at Port Jackson.

35. CrrRATULUS auSTRALIS. Large, rounded above, and flattened below, pos-
teriorly tapering. Head obtuse, eyes none; neck with two crowded clusters of
filaments, one on each side of the back at the fourth segment; body with a se-
ries of filaments along each side, one to each ring; which, however, are in most
specimens wanting on some of the rings. Setz in two rows on each side; the
superior ones capillary; the inferior ones (except anteriorly) short, stout and
arranged three in number to each ramus. Color greenish or reddish-brown.
Length, 9 inches; breadth, 0.45 inch. Found in the circumlittoral zone.

Hab. Cape of Good Hope, False Bay.

36. Guycera Krauss. Of alight flesh color, composed of about 100 closely-
set rings, at the 10th of which the breadth is greatest. Head subtriangular,
with 16 segments ; terminal tentacula scarcely perceptible. Proboscis smooth, in
length one-fourth that of the body; teeth small, much curved. Pinnez quadri-
lobate ; the few superior sete capillary ; the inferior ones very numerous and
falcate. Inferior cirrus large, lobe-like, placed close to the pinne ; superior cir-
rus placed on the side of the body, remote from the pinne. ‘i‘he branchial
tonguelet was retracted in the specimen examined. Length, 2 inches. Found
in the circumlittoral zone, on sandy battoms.

Hab. Cape of Good Hope, at Simon’s Bay.

37. Nepuruys toners. Body somewhat depressed, of a bluish-white color
narrow in comparison with the length of the pinne which project to a distance
equalling its width, on each side. Rings about eighty in number. Tentacula
small, placed rather near the base of the head, two on each side. Proboscis
with the terminal cirri short, the lateral ones large, curving backward, and co-
vering the anterior half of the organ, in eight circular approximated rows.
Pinne large; their membranous leaflets very narrow; the sete capillary, of
great length, and equal in number in the superior and inferior pinnz. Branchial
tonguelet large, much curved; often with a smaller one placed close to it on the
superior pinne. Length, 3 inches; breadth, 0.42; of the body alone, 0.16
inch. In sand at low-water mark.

Hai. Australia, at Botany Bay.

38. Lysipicr ropusta. Body much thicker than is usual in the genus; very
convex above, and flat below; of a copper color. Rings very closely-set, about
one hundred and twenty in number. Head concealed, but provided with three
conspicuous, tri-articulate tentacula, and with two large rounded lobes below.
Proboscis very short; jaws very strong, calcareous externally, corneous within.
Neck equalling the succeeding two rings together in size. Pinnze very small;
superior cirrus large, inferior one short; superior sete capillary, lanceolated but
tapering to a long hair-like extremity; inferior ones falcate with short smooth
terminal joints; acicle blunt, of a dark-brown color. Length, 2.8 inches;
breadth, 0.15 inch. Found under stones near low-water mark.

Hab. Australia, at Port Jackson.

39. NereIs MenDAx. Small, rather slender, largest anteriorly, flattened pos-
teriorly. Head elongated, narrow, with the terminal tentacles well developed
and extending somewhat beyond the thick inferior ones; tentacula cirri very
slender, variable in length, but usually reaching beyond the tentacles ; eyes very
conspicuous, the posterior ones largest and nearest to each other. Pinnz rather
large, anterior ones with pointed lingulz, and dorsal and ventral cirri; in the
posterior pinne the superior lingula loses its cirrus, and expands into a broad
lamella. Color variable; pale red, or brownish, often farinaceous posteriorly ;
always with a dorsal line of flake-white, and a white spot between the eyes.
Length, 1.5 inches; breadth, 0.2 inch. It inhabits a tube. Common in the
circumlittoral zone.

Hab. Cape of Good Hope, at False Bay.

40. Nereis opERTA. Large, of an uniform dark sepia color above, paler be-
low and posteriorly. Head short, eyes nearly hidden under the integument ; in-
ferior tentacles extending beyond the others. Anterior pinne with blunt lin-
gulz, large superior cirri, and very stout inferior sete. Posteriorly the cirri are
reduced, the superior lingula compressed and slightly expanded, bearing the cir-
rus upon its upperedge. Maxille broad, little curved, and nearly smooth on their
inner edges. Length, 4 inches; breadth, 0.35 inch. Found among rocks at
low-water mark.

Hab. Cape of Good Hope, at Simon’s Bay.

41, LepiponoTE semrrecta. Scales about twelve in number on each side, so
small as to reach each other without overlapping and to leave the middle of the
back bare. Head quadrangular with four minute eyes; and five tentacles, the
median largest, the exterior ones longer than the intermediates, but like those
annulated with black. Lateral cirri short, each with a black ring near its tip.
Color greyish-crimson, with black dots along the middle of the back. Scales
bright crimson, except at their attachments where they are white. Length 1
inch; breadth, 0.3 inch. Found at low-water mark, in the circumlittoral
zone.

Hab. Cape of Good Hope, at Simon’s Bay.

CHORISTOPODA.

42. AnTuuRa pouiTa. Oylindrical, smooth and shining; the seventh segment
nearly as large as the sixth. Head small, inferior antenne as long as the head,
somewhat larger than the superior ones and placed before them; eyes very mi-
nute, black, placed rather on the sides of the head at the anterior corners. Legs
of the first pair very thick, the rest slender. Abdomenshort and broad. Color
pale greyish, mottled. Length, 0.9 inch; breadth, 0.13 inch. Found at
the depth of two inches in sand, above half-tide.

Hab. Coast of the United States, at Norfolk.

43. AnTHURA PuNcTATa. Anterior segments elongated and slender, the sixth
broadest, the seventh very short, and bearing a much smaller pair of legs than
the others. Head scarcely narrower than the first thoracic segment, with a
slight rostrum, and large black eyes at the anterior corners; the inferior an-

tenne largest. The first three pairs of legs have much larger hands than the
posterior ones; those of the first pair being somewhat shorter and thicker than
the others. Color greyish above, from the numerous minute, black punctations ;
pale yellowish or whitish below. Length, 0.8 inch; breadth, 0.8 inch.
Found among Gorgonie in the coralline zone.

Hab. Cape of Good Hope, at Simon’s Bay.

44, ANTHURA CATENULA. Very slender, whitish, with a hollow square of
black on each segment above, giving a chain-like appearance to the back; head
smaller than the first thoracic segment; antenne rather long; eyes black, at
the anterior corners of the first square of color; anterior pair of legs short,
thick, and with strong, sub-cheliform hands; remaining legs slender. Abdo-
men slightly depressed, with a black transverse har, and a few symmetrically ar-
ranged black spots posteriorly. Length, 0.7 inch; breath, 0.06 inch. Found
under stones at low-water mark.

Hab. Cape of Good Hope, at Simon’s Bay.

45. AnTHURA L&vicaTa. Body smooth and shining, transparent white, ex-
cept a few crimson spots at the extremities. Head narrow; antenne small, flat-
tened; eyes minute, red. First three pairs of legs stout, with equal, sub-cheli-
form hands; posterior legs slender. Abdomen with its posterior funnel-shaped
cavity large, and with its anterior segments well-marked. Length, 1 inch;
breadth, 0.2 inch. On sandy bottoms in the circumlittoral zone.

Hab. Cape of Good Hope, at Simon’s Bay.

46. CaPRELLA soLiTaria. Smooth, slender, bright crimson; superior an-
tenne with large peduncles, inferior ones slender, sub-pediform. Head with a
strong spine, pointed forward, between the minute eyes. Hands large, with two
spines within, the largest next the finger. Branchial leaflets of the third and
fourth segments very small. Posterior legs with their terminal articles much
curved. Length, 0.6 inch; breadth, 0.05 inch. A single specimen, the
only caprella taken at the Cape, occurred on a gravelly bottom in Simon’s Bay.

47. IpHimepia opesa. Robust, thick; superior antenne longest, in length
two-thirds that of the body, and with thick basal articles. Hyes very large,
sub-reniform, black. Feet of the first two pairs with equal subcheliform hands
of moderate size. Caudal stylets slender, smooth; the posterior ones bi-
ramous. Tail terminating in one elongated scale. Color crimson with flake-white
blotches. Length, 0.25 inch. Found in the circumlittoral zone,‘on weedy
and sandy bottoms.

Hab. Australia, at Port Jackson.

48. Cipicerus Fossor. Body rounded above; abdomen with the third and
fourth articles compressed and raised above into a sharp crest. Head with
small round black eyes; superior and inferior antenne equal, with stout flagella
forming half their length, each flagellum consisting of about eighteen articles,
and having a serrated appearance from the produced, spine-like inferior corners
of each article. Mandibles palpigerous. Wxternal maxillipeds much elongated,
and curving downward. Feet of the first two pairs with equal, rather broad,
ovate hands, the finger being one-half as long as the hand; those of the third
and fourth pairs with the terminal article sub-ovate or paddle-shaped, with a
rounded extremity covered with hairs, without an unguiculus; fifth and sixth
pairs very short, with a compressed, clavate, or cutlass-shaped terminal article.
Epimera of the fifth pair very large, square. Caudal stylets all bi-ramous ; those
of the third pair with flattened rami, very hairy on their inner edges. Color
white with a few blackish spots. Length 0.2 inch. Found in the littoral
zone; concealing themselves in the sand as they are washed out from it by suc-
cessive waves.

Hai. Australia, at Botany Bay.

49, GamMaRUS RUBRO-macuLaTUs. Rather large, spotted with crimson
above, white below. Eyes sub-ovate, Superior antennex half as long as the

body, inferior ones much shorter and more slender. First pair of hands very
small and weak; those of the second pair large, compressed, and with a sharp
spine at the middle of the lower edge, where the finger terminates. Abdomen
exceeding the thorax in length, or at least equalling it, the appendages excluded.
Last pair of caudal stylets half as long as the abdomen; their rami long and
broad, equal, and spinulated along their edges. Length half an inch. Found
on muddy bottoms in the circumlittoral zone.
Hab. Australia, at Port Jackson.

50. LerucorHor aFFINIs. Robust, thick anteriorly, narrowed much at. the
abdomen, of a crimson color, mottled with white. Antenne equal in length,
slender, uniform in thickness as far as the short flagellum, where they abruptly
diminish in size. Eyes large, ovate, broadest above, whitish, with black beneath.
First pair of hands with the thumb and first article of the bi-articulate finger
greatly elongated and slender; second pair of hands very large, ovate formed
of the penult joint, with a parallel curved thumb projecting from the antepenult.
Legs very slender, the posterior pair longest. Length, 0.5 inch. Found on
a gravelly bottom in the coralline zone.

Hat. Cape of Good Hope, at False Bay.

51. Anonyx varizcatus. Large, slightly compressed; back rounded, smooth
and glossy, with a sinus at the abdomen. Antennz about equal in length, the
superior ones thickened to the origin of the accessory flagellum, which is short
and hair-like, equal in size with the true flagellum. Eyes large, black, reni-
form. First pair of legs with an elongated, tapering hand, and a minute finger ;
basal joints of the posterior pairs smooth. Caudal stylets elongated and slen-
der. Coler yellowish mottled with brown, with scattered white dots. Length,
0.8 inch. On sandy bottoms in the circumlittoral zone.

Hab. Cape of Good Hope, at Simon’s Bay.

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