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MEMOIRS

OF THE

I

MUSEUM OF COMPARATIVE ZOOLOGY

AT

HARVARD COLLEGE

EIOHTY-THREE PLATES TO ACCOMPANY.

Volumes XX. and XXI.

CAMBRIDGE, U.S.A.
PRINTED FOR THE MUSEUM.

1897.

Universitt Pbess;
John Wilson and Son, Caubiudqe, U. S. A.

W.I

C O N T E N T S.

THE NORTH AMERICAN CRINOIDEA CAMERATA. Rv Ciiahles Waciismith and
FiiANK SrniNOEii.

PLATES T. TO I.XXXIIT.

ToOETIIF.n WITH THE ACCOMPA.NYINO EXPLANATION,

I

JDtm(,ir» of tbt Htuseum ot </rom|)arutibe ^oblogu

AT HARVARD OOLLKUE.

GlUIII Y-TllHICIl I'LATKIt TO AcL'OMI'ANY.

Vols. XX. and XXI.

•I

THE NOIITII AxAIEUICAN

CUINOIDEA CAMERATA.

By CHARLES WACIISMUTII and FRANK SPRINGER.

EiaHTY-THREE PLATES.

CAMBRIDGE, U.S.A.;

ifrlntcli for tfjc IHusrum.
May, 1897.

ta

PLATES AND EXPLANATION OF THE TLATES.

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Fig. 1.
2.
3.

4.

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fi.

7.

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9,

PLATE I.

I'AnE

A long stem with a finoly preserved Root, probably belonging to Poteriocrintis.
From the lUirlington Limestone 44

Stem with enormous Cirri, probably of li.tocrhius i/miu/is, witli large eysts
on ttt'o of the cirri. From the Keokuk group at Crawfonlsville .... 43

Stem fragment from the Upper Devonian of Kentucky, with five rows of
large cirri, longitudinally arranged 43

Ti i"iinal end of a Stem, apparently of JSunji-rinus, attached by a flat surface.

From the Lower Burlington Limestone.
Profile /lew of the same.
Surface of attachment of same, showing open grooves passing out from the

axial canal of the stem 4C

Terminal end of Stem of linrycrimis, showing the large asteriform canal of
stem, and the linear canal of the cirri 40

The quinquepaitito Stem of a Han/rriniis, somewhat weathered, showing the
longitudinal divisions, and two series of pores to eaeli segment . . . . 4()

Terminal end of Stem of Bdvijci-inus, showing the largo axial canal, with the
laminated structures 46

. //. Sections of stem fragments of Banjcrinus, showing slits and pores through
the walls 46

10. Dor.so-oentral Plates, supposed to belong to a species of Ifeteromniis.
From the Hudson River group at Cincinnati 49, 51

(All specimens are in the oollectiou of Wachsmuth and Springer.)

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PLATE II.

Dktacued Stbm Joints of various fossil Crinoids.

Fig. 1 is a joint of Pentacrinus ; fig. 2 of Rhigocrinus. The stem fragment, fig. 3,
belongs to Mespllocrinus ; figs. 5, 8, 9, 11, and 12 to Plati/crinus ; fig. 6 to
Teleiocrinua, and fig. 7 to Cactocrinus. The specimen fig. 10, which probably
belongs to an Actinoerimu, shows beautifully the striations at its upper face,
and fig. 13 the connection of the cirrus canal with the stem canal.

ill and b represent the proximal end of the stem of an Onychocrinus, — 4 J showing
the infrabasals coalesced with the top stem joint (pp. C2, 65).

17 and 38 represent wide nodal joints to which extremely narrow internodal ones
are attached. Figs. 39 to 41 are nodal joints, with or without internodals ;
figs. 42 to 48 nodals, followed by internodals resting wholly or partly between
the projecting margins of the nodals. Traces of new joints occur in figs. 33
and 35. The joints iii figs. 14 and 20 probably belong to Megistocrinus Evansi ;
fig. 21 to Periechocrinus Whitci ; figs. 32, 36, and 39 to Cactocrinus ; fig. 40 to
Teleiocrimis ; to the five oval pieces shown by figs. 49 to 53 to Platycrinus.

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PLATE III.

Tub Plates subroundino and closino tub Peiustome,

I'AOK

Fig. la. CvATiiocRiNus GiLEHi W. and Sp. The intorrmlinl plates abutting upon the
radials preserved, but those covering the peristome removed. ((Joll, W.

and Sp.) 95, 1 14

JJ. Another specimen of the same species, xyith the intorradial i)latcs partly
covered by small marginal pieces ; — otherwise in the same condition as
fig. la. (.Siime collection.) '.)5

2. Cyatuociunus niiEVtsAccuLus W. .and Sp. (Ms.). Sliowing the disk ambulacra

and the madreporitn; tliu largo intcrr.adi.al pl.atus exposed to view. (The
figure is drawn witli the anal side n\>. Same collection.) .... 'Jfi, 114

3. CvATiiociiiNus NoDosiis W. and Sp. (Ms.). Like fig. 2 ; but tlie orals still

more asymmetrical, and the interradial plates covered by marginal piocps.
(Same collection.) <X, \ 14

4. CyATiiocRiNVS Mii.TniiiAciiiATVS Hall. Like fig. ',i; but witli tlie orals

rcsorbod. (Same collection.) 'JC, 114

C. EisrinocKi.Nus si-ikalis Angel. luterr.idiul [ilatcs exposed, very large, en-
clo-sing large covering pieces wliich close the peristome. (Drawn with
anal side up. Zoiil. Uiks AIus., Stockholm.) l)(i

6. CvATiiocuiNtH Ai,L'TA(Eu.s Augcl. Arrangement of orals as in I'lntycriniis,

asymmetrical ; surrounded by small perisomio pieces. (.Same collection.) 00, 114

7. The same species. The oral apparently in process of resorption. (Drawn

with anal side to the left. Same collection.) 98,114

8. Cyatiiocuinus L/Evis Angel. The orals partly resorl)cd. (Drawn with

anal side up. Same collection.) 96, 114

9. TiiAi'MATOCRiNus UEN'ovATus 1*. H. Carpenter. Having large symmetrical

orals surrounde<l by perisomo. (After Carpenter.) 88

10. The ventral disk of Hijorrinus hetheUUinus W. Thorn. The orals surrounded

by a narrow band of perisome. (After Cirpenter.) 88, 99

11. Taxockinus inteumedius W. and Sp. Ventral disk formed of small movable

plates i the orals consisting of four small plates and a larger one, sep.a-
r.ited by the ambulacra ; the mouth opened out. (Coll. W. and Sji.) 88, 89, 101

12. HAi'LocniNu.s mespilifoumis Goldf. The orals resting upon the radials.
12a. Posterior side of the or.al pyramid.

12*. Ventral aspect of the same. (Coll. W. and Sp.) 92, 93

13. Myutihocrini's amkricaxus H.all. Or.als .as in the preceding genus.

(Amer. Mus. Nat. Hist. New York.) 89

14. CcccocRiKus R09ACEUS F. Rocmer. The orals symmetrical ; separated from

the radials by a single interradial pl.ate. (Coll. W. and Sp.) .... 89, 90

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Facii
Fig. lu. Iinoi'uiNi'H vKVTHtroiirH W. ftnd Sp. Tho orals Mprcsentcil by nn uii-
diviili'it ilisk wliiuli h sunuuiidod by tlvu iiitiTrudial phiU's iiul uhuwii in

the f'l^'Mit'. (Sainu L'ulit'C'tiun,) 20ff

10. I'LATYiHtNiH HYMMKTiiicrH W. and S|i. Tlio orftU almost synimotrical.

(.Saiiio ooUectiuii.) 04, OOfi

17. ri.ATYiuiNUs i)i!iLOH)KUH O. aiid Sli. Thu iiralu more asyniiiiL'trical. (Same

collfction.) 8H, 8i), 91, 71 It

18. Ehf.tmochini'h coKoNATi'* (llall). The oi'ftU distinctly asymmetrical. (Same

collection.) 88, 89

19. T.xLAiicicuiNiis DKcoiiNiN W. and Sp. The posterior oral extremely large,

the other four unrepresented. (.Same collection.) 88

20. DoRvrBiNi'M Mississii'i'iKNSiH .Sliuiu. The orals unusually asymmetrical.

(.Same collection.) 88, 89

21. EuTitociioritiNUH CiiKisTVi Shum. The orals cxcentrio and asymmetrical.

(Same collection.) 88, 89

22. AoAiucocHiNrs Woktiikni F. Koemer. The orals separated from one an-

other by pcrisomic plates. (Same collection.) 88, 89

23. MABSurionuiNus dei'kkssi's Anpel. The orals quite small ond asyra-

metrically arranged. (Same collection.) 88, 89

24. EuoDocHi.vi's WiiiTEi Hall. The orals altogether unrepresented. (Same

collection.) 89

25. 8vMHATiio(iiis-L's Wachsmutiii M. and W. The orals asymmetrical, and

supported by the upper muscle plates. (Sumo collection,) 89

(Figures In, 4, 6, 6, 7, 8, and 16 enlarged } ; Figures 2, 3, and 16, ?.)

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PLATE IV.

Ventral aspect nf tlip intprtial wist of a Hpi'cimcii of TileiwHnu$, with lub-

tt'tjiiiiiml aiubuUivni rvHting auuiimt tliu iiiiiut' IIodf ({) Wi

Tho oaino aiiicct III a luiturnl coat of /'/if/«Wiii'n'»»fi i'i'H//-iVu<MJi 103

Tliu Hiimo ill a cast of /'hi/sitncitinia iiniiitii.i 103

'I'lio Haiiio in a Ciwt of Strutneiiiiiin nijuVm 103

Internal cast of a Ihtri/rrinu*, of wliii'li llin nicdian part of tlio ainlmlacral
Hki'lfton, contrary to tlio case of llie four preceiling species, does not toucli

tlio inner lloor of tlic trgmeii 103

Cast of a I'/iityrnnim, In wliieli tiio omlmliicra are sul)teKniinal to the arm

bases, lH)inj{ pluceil at some ilistanee from tlie inner tloor of the disk . . 103
Cast of ail Kiitfiii'lini-riiiiiii l'/ir!sti/l, sliowing Impressions of tlic lining covering

the inner tloor of the disk 103

Ctictiieriniit ijlmia, showing fragments of the convoluted (digestive) organ, and
to the loft the subtegnilnal amliiilaora of one ray (f) 103

(III the following spoelineiiM — Kigs. 0 to 17 — a second aiml opening ia
introiliiced at various parts of tlic calyx, tlio regular aperture having
probably lieen obstructed.)

A specimen of U'ltucriiiun, in wliicli a new opening has boon formed between

the basal.s toward the anterior side 130

A specimen of Ilntiii-riiiun niihwi/iiitHn, with an abnoriim' opening directly
above the basal.'), iiu. living tlio wliole of the right jiosterlor aide of the

dorsal cup (slightly enlarged) 130

A sm.all specimen of Tch'wfiiuia uiiihrnaun, with a second tube passing out

from the tognien 130

A St('f/iini)eriiii(s jiciilmjonus, with a second anal tube given off near the base

of the regular one 130

A malformed specimen of Eutmehocrinun C/irintyi, with a second tube formed

above the arm bases 130

A Ildtorrimis laurn, with a second tube given oft from the base of the origi-
nal oiio and a third tube apparently in process of formation 135

, A specimen of Macrocrinus jncundw, In wliieli a small tubo branches from

the regular ono 130

, The anal tube of Eutrorhoennus Christ iji with a transverso lateral branch . 135
, Another tube of the same species bifurcating above the tips of the arms . , 1.30

, The base of a Plati/crinua, showing irregular, wart-liko protuberances, dotted

with small circular pits.
. A radial plato with similar pits, surrounded by a circular rim.
I. A piece of a column affected In a similar manner.

(All specimens are in the collection of W.ichsmuth and Springer, except
that of Fig. C, which is in the collection of Mr. R. U. Rowley.)

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17.

PLATE V.

The Convoluted Organ, and the structure beneath the Teomen.

Page
A specimen of Tdeiicriiiiis, sliowiug the convoluted organ, and portions of the

anibulacral skeleton, both heavily coated with silieious matter (}) . 100, 143
The same organ in Citefocriiiiis, showing the partition which forms the second

convolution, tlie outer wall being removed lOG

A Teleiocrinus mnhrosm, with the whole convoluted organ intact (slightly en-
larged l'^^

Anotlier specimen of the same species, exposing the walls forming the third
convolution, the two outer ones removed (slightly enlarged) . . . 106, 143

The convoluted organ of an A'jarkocriinis, seen from above 106

Cross section of the same organ in a specimen of Batocrimis 106

Dorsal aspect of the same organ in a specimen of Macmcriniis vcrnenilkinus . 106
Lateral view of the organ in .1/. venieutlinmts ; its upper end surrounded by

an annular vessel lOo, 143

The convoluted organ in a specimen of Strntocrinus 143

Ciictocriniis probosi-'ulilis, showing a portion of the ambulacral skeleton, and

the convoluted organ beneath 107

Ciictocrhiusthetis, showing the delicate network of the convoluted organ . . 143
Dorsal aspect of t!ie organ in Eutrochocriims Choistyi (enlarged) . . . . 143
A broken specimen of Dori/crhtus, showing the internal lining and covered

galleries along the inner floor of the tegmen 106, 107

The inner floor of the tegmen in a Physeton-inus vcntrkosxis 120

A broken specimen of Lulmmmis hngimstrh, showing the lining within the

dorsal cup ^""

The inner floor of the tegmen of a specimen of Tchlocrinus rudis ; heavily

coated with silieious matter 106, 107

The inner floor of Jiatocrlnus innrnritu.i, formed into open galleries for the
reception of the ambulacra i""

(All specimens are in the collection of Wachsmutli and Springer, except
those of Figs. 10, 11, and 15, which are in the JIuseum of Comparative

Zoology.)

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PLATE VI.

(Figs. 1 to 12 lire represented to sliow the orioiitatiou of tlie stem and axial
canal among Xcozoic Crinoida ; figs. 13 to L'O the close alUuities between
tlie IchtliyoorinidcB and Comatulaj.)

MiLLERicRiNus Okdionyi de Loriol <>!

Fig. In. The crown with a portion of the stem ; the angles of the latter interra-

dially disposed. (After de Loriol ; C'linoides de la France, I'l. 110, fig. 1.)

U. Inner aspect of the base; the space which is empty in most species of

Millei'kriniis occupied in this specimen by small intrabasals. (After <le

Loriol ; ibid., fig. Ic.)

MiLLEBICUIN-US POLYDACTVLUS do Loriol <")1

2a. The infrabasals attached to the truncated upper end of the stem (lateral

view).
2i. Ventral aspect of the same. (Both after de Loriol; ibid,, V\. 110, figs.

\a, 2u.)

MiLLEBicniN-us icAUXENSis de Loriol *Jl

3. The dorsal cup with tlie proximal joint of the stem attached | the angles of
the latter corresponding with tlie angles of the basals ; the axial canal
quite small. (After de Loriol ; ibid., I'l. 01, fig. M.)

MiLLEiticniNUS MiLLEBt d'OrWgny 01

4rt. Ventral aspect of the dorsal cup ; the diameter of the open space between
the basals almost as great as that of the whole stem. (After de Loriol ;
ibid., V\. 90, fig. 3.)

4i. Dors.al aspect of the cup, showing the small size of the axial canal. {Ibid.,
Plate 90, fig. 2«.)

MiLLEUicHixt's CARAnoEi'Fi de Loriol 01

5. Showing in a side view the angularities upon the proximal face of the top
stem joint. Being radially disposed, they conform to the depressions
upon the outer face of the basal disk; whereas the angles along the sides
of the stem are directed interradially, in accordance with the rule govern-
ing dicyclic Crinoids. (Ibid., V\. 59, fig. 3f.)

MiLLERicKiNus MUNSTEUiAxus d'Oibigiiy 02

G. Top stem joint, showing the angular ridges upon the upper surface. (After
de Loriol ; ibid., PI. 83, fig. 2.)

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Rhizocrinus Rawhoni Pourtalcs G3

Fig. 7(1. Dorsal asiMict of tlin cup ; the vacant siiauo bctwuoii tlio basals of ilifforcnt
form, anil larger than the axial canal ot the Hteni. (After 1*. H, Carpenter ;
Challenger Uep. on Stalk. Crin., I'l. X., lig. C.)
111. Distal face ot a stem joint. (74 W., fig. 14.)

rENTACiiiNus A8rKuiA.s W. I'liouison 08

8. Dorsal aspect of the cup ; the empty space within the basal ring intorradially

disposed. (Carpenter, ilitd., 1*1. XII., tig. IC.)

Mbtachikus AxoutATUs P. H. Carpenter 05

9. The space within tlie basal ring, contrary to preceding figure, radially dis-

posed. (After Car|)enter ; ibid., fig. 2.)

BATIIYCBIXUS ALDRICIIIANI'S 1'. 11. CARPENTER 06

10. Horizontal section of the basal ring. (After Carpenter ; ibid., I'l. VII6.

flg. 2.)

11. Tlio infrabasals ot O.VYt'iiocRiNi's, coalesced with the top stem joint. (Coll.

W. and Sp.) 05

12. Dorsal aspect of the Hase of (iLYiTocniNus dkcadactvlus; the interradial

outline ot tlie upper. stem joint taking its form from the basal concavity.
(.Same collection.) GO

13. 11, and 15. Pentacrinoid larv.i? of Astkuox. (After P. II. Carpenter; Chall.

Uep. on the Comatiila; PI, XiV.) 153

10. A young Taxocrinus from the Burlington Limestone. (Coll. W. and Sp.) 152

17. A young 0»YciiocRi>fU8 from tlie Keokuk Group. (Same collection.^ . . 152

Antedon Rosacea Lamarck 152

18. In its young stage ; tlie centro-dorsal and succeeding stem joints interradi-

ally disposed, the primary cirri radially. (After W. B. Carpenter; Pliilos.
Trans. 1800, PI. XLI.)

19. In its adult state. (Ibid., PI. XXXVIII.)

Onyciiocrinus TJLRicni S. A. Miller 162

20. In its general structure resembling a young Antedon.

(Figs. 2b, id, la, 8, 9, 10, 11, 12, 18, are drawn witli the interradial side up ;
Figs. U, 3, V>, C, 19, 20 with the radial side up.)

mu

■#fliw

■%■■,

t

PLATK VII.

ScAI'lllOCIlINrH KLpiANH \V. 1111(1 S|l. (.MS.) Kljt

l'"ig. 1((. Anterior siilu of tlii; Mpocimoii, showing the vi'ntnil sno ftnil tlio anal o|)cn-
iiiK linv (luwn in tlm nuc, (Only the lowor Imlf of the 8|ii;ciniun is drawn.)
1/'. ToskTior siile of tlic HjifcinR'n. (Ka.iliiiskia grunii, Kontucky.)

ScVTAtocBiNiH vAi.iins \V. aiiil Sp. (MS.) 138

2'/. Lateral asjiect of a siiooinicn with arms ; tliu anal opening located anteriorly

in the lower jiart of the vontial Hac.
2li. The ventral sac sonii'wliat enlarged.
;i. Anterior side of the sac of another specimen. (Itoth from the Kiokuk grmiii,

Indiana.

DECADOrlllNl'S OIIANDIS W. atiil Sp 138

4. An.al opening (jcciipying the anterior side of tlie sac a little jiliovc midway;

the jwri's at tlie lower part of the sae passing through the test, as shown
upon tlie lateral edges of the plates.

5. A specimen showing the posterior side of the sac. (Keokuk group, Craw-

fordsville, lud.)

ScAi'iiiocuiNus UNiciTs Hall 138

0. I'osterior side of a specimen, showing the ventral sac to its full length.
(Locality and position same as last,)

ScVTALorBlNUS (sp, uudct.) LSS

7. Anterior view of ventral sac, showing the pores along the siilea of the plates,

and the position of tho anus. (Kaskaskia grou]>, Kentucky.)

ScAfiiiocRiyus SwALLOvi Meek and Worthcn 138

8. Portion of the ventral sac; composed of stellate plates witli jiores around

their edges. The duets of the pores ])lainly visible in places where the
plates are slightly pushed out of position

Aii.ociiixijs A(iAssizi W. and Sp. (MS. Nov. gen. and n. sp.) . . 138
(luUdj a small tube, KiUmv a lily.)

9. Ilight postero-lateral aspect. Anus at tho end of a special tulw, given off

half w.iy down from tho anterior aide of tho ventral sac. Sae and tube
profusely perforated by pores. (Keokuk group, Indiana.)

CcELIOCIlINtS VKNTUICOSfS (Hall) 138

10". Posterior side of the ventral sac.
lOi. Anterior side of it.

CvATiiocniNUS NODOSus W. and Sp. (JIS.) 137

ll'(. The anus at the end of the ventral sac slightly excentric iu position, and
closed by eight or nine plates forming a pyramid.
Hi. Distal end of the ventral sac enlarged.

CvATiiocniNis nnRvisAccrLus W. and Sp. (MS.) 137

12(7 and li. The ventral sac with tho anus in tho same condition as in the pre-
ceding species.

(All specimens are in the collection of Wachsmuth and Springer.)

i \

„g', g

J

I

a'''.i.'>Tf Il.rtiftr < J b.'-.tT

PLATE VIII.

Pa(;f.

Babrandeocbinus sceptbum Augel 1^4

Fig. 1. Showing arriingeiiiont of the plites in the ciilyx, and struotuve of arms anil
pinnules. (Drawn by >rr. G. Liljevall from a specimen from Gotland in
the Zobl. Uiks Mus. at Stockholm) (f).

CuoTALOCBiNua puLCHEB (Hisingcr) iri4

2. A specimen from Gotland, showing the net formed arms. (Coll. \V. and Sp.)

Cbotalockinus n. sp ^*>l

3. The tegmen of a specimen from Gotland ; drawn by Mr. G. Liljevail (Zoiil.

Kiks Jfus., Stockholm) (f ).

Cbotalocbinus buoosus (J. S. Miller) 104

4. Tegmen of a tine specimen from Dudley, Eng. (\>). (Coll. W. and Sp.)

TAXOCBINU.S iNTEEMEDics W. and Sp lis, 123

5a. Showing the pavement of the ventral disk, and the pouches along the free

rays. Antero-lateral view.
5i. Posterior view. (Coll. W. and Sp.)

FoEBESiocuiNua xoBiLis do Kon. and le Hon 87, SS

(Plates showing the fossse along the edges.)
C'(. Distal face of the axillary costal (V).
C.'i. Proximal face of the same (V).
Ot. Lateral face of an interradial plate (V). (Same collection.) '

Symbathocbinus Swallovi Hall l''i<J

7. A specimen with arms, from the Keokuk group of Canton, Ind. (Coll. W.

and Sp.)

Symbathocbinus Wachsmctiji M. and W 89

8. A specimen with the arms removed <at the posterior side, exposing some of

the plates of the anal tube, and the asymmetrical orals. (Coll. W. and Sp.)

9. Another specimen also showing the orals, and the base of the anal tube (f).

(Same collection.)

' PiaocRiNus (sp, undet.) 138

10. Lateral view of a specimen with arms from Tennessee. (V) (Coll. W.

and Sp.)
(This figure was drawn by Jfr. Keyes in 1886, from a specimen found by us
in Western Tennessee in 1883. Mr. S. A. Miller, in the 17th Report of

1'

the Indiana Geological Survey for 1891, p. 637, took the liherty of stating,
most uuwanantably, that we hail desoribeil, in the third part of the
Eevision of the I'ahcoorinoidea, p. 173 (1885) tlie arms of Pisocrinus,
which we " knew notliing whatever about." The tone of his article was
such as to preclude any notice from us, except to publish tliis figure in
refutation of his statement. Angelin figured tlie arms of Pisocrinu.t as
early as 1877.)

Allauecrinus Carpenteri W. and Sp 78

Fig. 11. TIio type specimen, with two arms in one or more of the rays. (Illinois
State Collection.)

Stephajtocuixus anoulatus Hall 46

12. A yery elongate specimen. (Amer. 5Ius. Nat. Hist. New York.)

13. The disk in perfect preservation ; the centre closed by five symmetiical

orals. (Same collection.)

CATiLLOCRijfus Waciismutiii M. and W 72

14. Specimen with arms, ventral tube and stem. (Coll. W. and Sp.)

Marsupiocrinus radiatus Angel 103

15. The tegmen, with small, regularly arranged covering pieces \^). (Drawn

from a specimen in the Zool. Riks Mus., Stockholm, by Mr. G. Liljevall).

Wi

if II

Fig. 1((,
U.
U.

Ic.

3/-.

0(1.

r>h.

Cxi.

{•,'1.

7h.

7c.

PLATE IX.

Paor
Reteocrinus Onealli (Hall) 179

Anterior view of a siiecimen with arms {\). (Coll. I. H. Harris.)

Posterior view of anotlier speoiineii with arms. (Coll. W. ami Sp.)

Lateral view, sliowing ventral disk. (Same collection.)

A portion of the ventral disk enlarged. (Same collection.)

'nner floor of the calyx, showing the small supplementary plates which

surround the primai'y interbracliials (^). (Same collection.)
The type of " Gli/jitoerluiis cor/natus." (After Miller.)

Reteocrinus magn'ificcs S. a. Jliller 181

Side view of a specimen with arms and portions of stem. (Cul. I. II. Harris.)

Reteocrixus 8TELLAKIS Billiugs 178

One of the type specimens, posterior view. (Museum Geol. Smv., Canada.)
Anterior view of another type specimen. (Same collection.)
Part of the calyx, showing the iixed brachials. (Same collection.)

Reteolkinus fimbriatus Hillings 179

The type specimen in a lateral view. (Museum Geol. Surv., Canada.)

Xexocrini's Baeui (Meek) 18.5

Posterior view of a specimen witli arms. (Coll. I. H. Harris.)
Lateral view of another si)ecimen witli arms. (Coll. W. and Sp.)
Inner floor of calyx (V). (Coll. I. H. Harris.)
Section of an arm, greatly enlarged.

Xexocrixis pexicillus S. a. Miller 183

Lateral view of one of the types'(f ). (Same collection.)
I'ostcrior view of another type specimen ({). (Same collection.)

Tanaocrixus tvpvs W. and Sp 18C

Posterior view of a type specimen (f). (Coll. W. ond Sp.)
Anterior view of another tyjie specimen (f). (Same collection.)
The steiQ, enlarged.

iff

il

i

I

•^:^

PLATE X.

Page
AhCH.EOCKINUS LACUN081I8 (liilHiigs) 253

Fig. 1. Posterior view of thn type specimen. (Museum Oeol. Surv., Canada.)

Akcii.eocuinus micbobasams (Billings) L'oO

2a. Specimen with arms and stem. (Coll. John Stewart.)
26. Another specimen. (Same collection.)
2c. Basal aspect. (Same collection.)

Arch.bockixus pyrifgrmis (Billings) 255

3(1. The type specimen, (Museum Geol. Surv., Canada.)

3b. A crushed specimen, showing the arms. (Same collection.)

ARCII.EOCRINfS DE.SIDERATUS W. R. BilHngs 257

4(t. The type specimen with arms ; the left posterior radius in front. (Coll.

W. U. Hillings.)
46. Dorsal aspect of the calyx. (Coll. W. and Sp.)

DiABOLOcRisus HiEROOLYPHicus W. and Sp 252

5(1. Dorsal aspect of a large specimen. (Coll. W. and Sp.)
56. Side view of the same.

5c Anal side of a s* all specimen. (Same collection.)
(Figs. 2c and 5a arc drawn with anal side up.)

l^^-f:

:.;\

k I

'"**BH»

,. *

' f

1

^

i

1

(1

; 1 i

PLATE XI.

I)|.\llcll.n(Hl.NlS rKKfLKXl'M W. 1111(1 Sp.

I'AI.II

Oorsul vii'w III' a large calyx, slinwiiij; very siimll suiiplciiiriitary [licccB

(iloiig till' sidcH uf the niilials and bctweun the iiiturradialti.
Ventral aspect of the same.

l)l.Vll(lI.r)lIllNIS VKHPKRALIft W'llitO .

201

1''.
1'/.

4".
U.
Jr.
4'/.

4«.

4/

Lateral \ iew of a specimen in wliicli iin snpi>lenieiitaiy pieces are developed.
Lateral view of a speciiiien in which the primary iiiterradiuls arc completely

Hepiirated from the radiaU by supplementary pieces. (All in Coll. W.

and Sp.)

UiiAriiANocHlNrs MruxouoMUs (Wulcott)

The typo specimen. (>liis. Comp. Zoiil.)

KiiAPiiANficBtNus sci'M'Tus (Millor)

A specimen with arms. (Coll. I. II. Harris.)

liYUIOCni.Vl'S MELISSA (Hall)

. A specimen with arms. (After Hall.)

. Dorsal aspect of a large specimen. (Coll. W. and Sp.)

Ventral aspect, showing portion of the tegmcn. (Coll. W. F. E. Gurley.)

A smaller specimen, with the tegmen preserved, and showing the anus.
(Coll. W. and Sp.)

Lateral view of the calyx. (Coll. W. F. K. Gurley.)

A young specimen with arms. (Coll. W. and Sp.)

200

2G0

2C3

LyRIOCRINUS DACTYIUS Hall

c.

•and b. The types. (Amer. Mns. Nat. Hist, Kow York )
Specimen showing the pinnules. (Mus. Comp. Zool.)

RlIODOCRINUS WORTIIEJJI Ilall

A slightly crushed specimen with arms. (JIus. Comp. Zoiil.)
EnonorRiNt's nanus M. and W

262

220

228

7n.
74,

Th3 type specimen, lateral view; from the Burlington Limestone.
Ventral aspect of the same. (Mus. Comp. Zool.)

■|-.N -;. I /. -A, '|-|-AlA

5

Ci-h: :'K,V. Ah''.VV,v..,j.i.^ ,t;

I---

h

■"'"-» I ■

'%

•s.

^

PLATE XII.

Pace
KnoDOCRiNus KinDYi W. and Sp 226

Fig. In. Specimen with spreading arms.

16. Another specimen with arras and column, anterior view.
Ic. Posterior view of another specimen.
1(1. The calyx, posterior view.

RiioDOCRiNus NANUS M. and W 228

2a. Anterior view of a specimen with stem.
2J. Posterior view of another specimen.
(Both from the Kinderhook group.)

RiioDOCKiNus Barbisi Hall 230

3. A small specimen with arms.

4a. A very large, nodose specimen ; dorsal aspect of the calyx.

4i. Side view of same specimen.

4c. Posterior view of same.

■id. Ventral aspect of same.

5(1. Lateral view of another specimen.

54. Dorsal aspect of same.

RnoDOCBiNus Babrisi, var. striatus W. and Sp 231

6. Lateral view of dorsal cup.

RlIODOCBINUS WOBTHENI Hall 220

7a. Specimen with arms.

7A. Dorsal aspect of calyx.

7e. Ventral aspect of same specimen.

Rhodocbinus Wobtheni, var. ubcbolatus W. and Sp 221

Sa. Posterior view of the calyx.

86. Ventral aspect of same specimen.

RiiODocRiKus watebsianus W. and Sp 221

9. Specimen with arms and stem.

(All the specimens are in the collection of Wachsmuth and Springer.)

'!< ;N JIL'KA 'At/KrtA'IA

H-lioivp? !'ni.Mti! :-. V,--

■^

M

l£

i

PLATE XIII.

Paok
BiioDOCRiNus AViiiTKi Hall 223

Fig. 1(/, Dorsal aspect of calyx. (Coll. W. aud Sp.)
lb. Ventral aspect of same specimen.
1b, I'osterior side of same.

RiioDocniMus TUUNCATU8 W. and Sp 231

2(1. The type specimen, lateral view. (Coll. W. aud Sp.)

2b. I'osterior view of same.

2c. Dorsal aspect of same.

2il, Ventral aspect of another specimen. (Same collection.)

2e, Side view of same specimen.

2/. Side view of a very large specimen. (Same collection.)

RnoDOCKiyus tuberculati's W. and Sp 232

3. Side view of the type. (Coll. W. and Sp.)

4. Side view of a largi'r and more nodose specimen. (Same collection.)

RiiODOcutxus Waciismutiii Hall 222

txi. A large specimen witli arms. (Coll. W. and Sp.)

6i. I'osterior view of calyx. (Same collection.)

5c, Side view of same specimen.

5(1. Dorsal aspect of another specimen. (Same collection.)

RiioDocRixus coxANUs Wortheu 222

G. The type specimen j lateral view. (Coll. L. A. Cox.)

7. Another specimen of this species, described as Rhodocrinus poli/dactylus.

(Same collection.)

RiiODOCRiyus NODULOsus Hall 225

8. The type specimen. (After Hall.)

Trysanocrinus Halli Lyon 196

9a. Dorsal aspect of calyx. (Coll. Borden Institute, New Providence, Indiana.)
9i. An abnormal specimen. (Same collection.)

L/i MPTKROCRiNus Ten'nksseensis Rocmcr 208

lOo. Posterior view of the calyx. (Coll. W. and Sp.)

104. Ventral aspect of same.

10c. Anterior view of another specimen. (Same collection.)

lOd, Portion of the stem.

Tiivlacocrin'us Clarkei W. and Sp 248

lla. The type specimen, lateral view. (State Cabinet Nat Hist. N. V.)
Hi. Infrabasal disk, showing the stellate column facet.

s

I

it

-K>.

5fe

'>^:

PLATE XIV.

QllDKaTSOCRINI'.l TVrCS (llilll)

Fig. 1. I)on,.il aspect of a largo siiocinuii witli tlio apiwiidages proscrved nearly
oiitiro. From the Hurliiigtoii ami Keokuk Triiuaition Ue<l.

2. Another specimen from the same horizon ; siile view.

3. A specimen from the Upper Hurliiigton Limestone with the appendages and

portions of the arms preserved.

(All specimens in the collection of Wachsmuth and Springer.)

Paob
'.'42

-

*S^

iitwi-r'

6

I ■ .1 '. .-.•'f i-.>i '

1 1...I'

■ "r.::.:.t ' ?'.M

■

— 11 in;ygr

PLATE XV.

Gli.iiKKTsocuixrs TI-11KUU8US (Lyoii ami Cass)

Kij,'. 1". A lar^'e spcoimen sliowiiig the calyciiic apiMMiilages.
1/'. Auuther siiociiut'U, showing the aiipeiidages anil arms.

GiLiiKRTsoriiisi's Disi'Axsrs W. and Sp.

Paoi

239

240

1V».
2''.
2«/.

Vuntial aspect of a specimen, witli ealjcine appendages and arms preserved.

Dorsal aspect of the same specimen.

Lateral view of the calyx.

Ventral aspect of the same specimen.

Ull.llKIlTSOCUINrS SI'IXKlKBf.H (Mali)

Tim type specimen, dorsal aspect of the caly.\.
Lateral view of the same specimen.
Ventral aspect of tlie same.

GiLiiKiiTsdCKiNis sTKi.r.Aiiis IX' KoM. and Le Hon

247

230

.''idi^ view of a sliLfhtly enlarged specimen from Helginm. (In this species,
and the succeeding one from Kngland, the appendages are arranged in live
ji.airs of separate tul)es ; dilTering from most of the American species, in
which tliose of adjoining interradii are coalesced for some distance beyond
the calyx.)

Gd.llEItTSOCKIXUS CAI.CAKATrs Pliillips

230

Figured to illustrate the dift.'rences in the structure of the genus between
Kuropoan and American forms. Mountain Limestone, England.

UiionociiixLs WiiiTKi Hall 223

Side view of a large and very perfect specimen.
Dorsal aspect of same specimen.

Kiionoruixis \Va( usMrrai Hall

.\iiterior side of the calyx.

(.Vll tlie specimens are in the collection of Wachsmnth and Springer cxcejit
tliat illustrated by figs. .Icj, h, <■, which is in the Canada Survey Museum
at Ottawa.)

'-' \i'j»vi:

mri

t

■ \.„ — -_»

^i.

fl^

i

1r

i

■iiii

I

PLATE XVI.

GlLBEKTSOCHINUS TUBEROSUS (LyOU aUll CuSS)

Fig. 1. Si)eciineii with stem.

2. Another specimen ; ventral aspect.

3. Ventral aspect of another specimen with additional branches in the appen-

dages. The anal opening covered over by a I'latycems eijuilaterum.

4. Ventral aspect of another specimen.

r>. Dorsal aspect of calyx, showing the bases of the arms.
fi. A crushed specimen with api)eudages, arms, and pinnules.

(All specimens in the collection of Wachsmuth and Springer.)

Paqk
239

4

■Mm

4-

'f'-cUl

•s*

rSBSSr

i i

I

i

if

PLATE XVII.

Pack
GiLUERTHOCRIXUM HETICULATl'f (ILlll) 244

Fig. 1(1, Dorsal nspuct of the calyx.

14. Lateral view of auotlicr siiccimcn.

GiLiiKiiT»(p( Rixis KiscELLus (M. auil W.) 248

2'/. Anterior view of calyx.
L'/<. Posterior view of same.
"<■. Ventral asjiec't of same.

2(/. Posterior view of another sppcimen, in which the appendages next to the
posterior side separate within the calyx.

GiLiiEiiTsocRixus TKNiiu.viii ATI'S (M. and W.) 240

3. Dorsal aspect of a crushed specimen, showing parts of the appendages.

Gii.nEHTsoenixf.s obovati's (M. and W.) 241

4". .Side view of calyx.

■\li. \'entral aspect of same. (Figure drawn anal side up.)

GiLBERTsocRiNTs TunKRcrLosrs (Hall) 24.'{

." (. A specimen with arms, appendages, and stem.
'ill. Dorsal aspect of another specimeu.
;")(■. Ventral aspect of same.

GiLHERTsocBixus Ti'BEROsrs (Lyoii and Cass) 239

(■). Dorsal aspect of calyx.

GlLllEKTSOCRIXl'S TYPfS (Hall) 242

'ii. A large specimen from the Upper Hurlington Limestone.
74. Portion of the arms, showing mode of bifurcation.

(All specimens in the collection of Wachsmuth and Springer.)

■

MM

I

I

r

PLATK XVIII.

I'TVi IICIC UIM'« I'AHVI N (IlilU) lUU

Fin. I' Vi''W ut tlic a|H'i.'iiiii'ii ilcMi'iilH'il liy S, A. Mill"'!' us llhiiil'ii-iiniia niii/iihnlii
(f). (toll. S. A. MiU.T.)
lA. Aiiiillirr i(|it!i'iiin'ii Willi ilic iiniis liottiT |ni'si'i'vi!il (j). (SaiuK t'dlloctioii.)
U. rill' s|M'eiiiii'ii lU'SoiiU'il by Wi-lliciliy lu (ilijiil'irvhiim (liili'iiriiin») i/riifilin
(fi. (full. Mr. ViiuiH'l.)

I'tYi lllPl III.S'l'N HI'LKNDK.NH (Mllll'l') 108

Hi, T'lt' typo niii'ciiiu'ii (^ 1. (Coll. S.A. MilliT.)
Jli. AiiotluT »iioi'iiiiuii (<i (Siviiiu coUiTtloii.)

TllVKANUCIIIM H I.II.IIKollMM il;ill IWi

I. Tlio tyiH) spi'ciiiii'M. ( .\Iii8umii (it Coiiu'll University.)

TllVH.VNiM'ltlNrH IKTIIIKNTAI.IM (Hull) 104

Ti/i, Siili" view of calyx (y). (AlVr Hull.)
oil. I'oati'rior vii'W of calyx, (.\ftcr Hall.)
."..•. Dorsal aspect of calyx cf). (.Vftcr Hall.)

TllVHANOIIlIM!* IMIIIS.VTI'H (Hall) 103

()•>. Anterior view of calyx, (lull. \V. F. E. Uiirley.)

(')''. I'o.stciior view of same Mpeeimeii.

lie. Ventral aspect of same i'i).

(■'/. A yoiiM}{ gpuciiiien, prubalily of this species, (8aine coUoction.)

Tiivs.\NociiiNiH iiii.kriii.vTi'it (Hall) 193

7. Uors.il aspect of the type apeciineii ; the matrix removed so as to show the
pinnules ami the arraiiijemeiit of the plates. (Am. Mus. Nat. Hi.st. X. V.)

IiiioiHiN-is Ki.oNo VTis W. and Sp 2(13

S.i, The t\ io specimen; side view, (Coll. \V. ami Sp.)
H'l, Ventral aspect of same ( |').

S''. Another view of tlio ventral disk (}). (Anal side to the rijjht. (Ndl. W.
and Sp.)

iDiorKixrs vKNTiciiosi's W. and Sp 203

!l". The type specimen i side view. (Same collection.)

%. Dorsal aspect of thu ilorsal Clip. (Anal side to the left. Same collection.)

Idioirints iMM.VTiiits (Hall) 2tt0

10./. The type specimen ; anterior view. (Am. Mu8. Nat. Hist. N. Y.)

lOA. Posterior view of same.

lOc. Dorsal aspect of same. (After Hall.)

Ikiochixi-h tkxnksskknsis ^Wurthcn) 2()(J

II. The typo specimen. (Illinois State Collection.)

I

-

\

\i

I J

ss^www**^

i*^**'

v!i

/.:

, !!■»*•

I I

PLATE XIX.

l-ij-. 1'/.
•J//.

3.'.

;(/,.
«>''.

Sii'uuxoi liiN'is Ndiiii.is (Hall)

Gutta perclia cust made from a natural moiilil. (After Hall.)

Till' iiuimiuepartito iiifrabasal disk.

Internal (!ast, .showing the arrangement of the ambulacra upon the left side

(Coll. T. A. Green.)
Lateral view of a similar cast, sliowini; their arrangement at the right side.

(Same collection.)
Ventral aspect of another east. (Same collection.)

Sii'iio.NoeiiiM's AHMoscs MeC'hesney

Left siilo of an internal cast ; the anal tube overlying the andiulacra, and
passing over to the anterior side of the calyx, being subtegndnal to the
arm reijions. (Same collection.)

Another speeimen, showing tho right side of the calyx. (Same coUeetiun.)

Ventral asiiect of another oast. (Same collection.)

Paiif
L'lL'

'.Ml

4./.

4A.

Sii'iioNocuiNis I'KXTAdo.Ncs W. aud .Sp. ....

The tyi)e specinuMi J l.ator.vl view. (Same collection.)
Ventral aspect of another siiecimen. (.Same collection.)

TiivsAxncnixrs ixokxatis (llall)

Dorsal aspect of specimen with jiortions of arms. (Coll. W. and Sii.)

Hvi'Tiof uiMs Tvi'is W. and Sp

L'l.'i

I'.l.f

'JOl

0..'.

Dorsal aspect of the specimen described by Miller as Cijiilini'rlniis <j,irliij\.

(.\fter Miller, drawn with the anal side down.)
Liiti'ral view of calyx. (CoU. W. '^nd Sp.)
N'entr.al aspect of caly.x. (Same collection.)

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PLATE XX.

Pitnc

OLYPTOCRiNrs DvKKi (Mi't'k) 271

A larno spociinou with arm.'f. (CdU. I. II. Hiirris.)

I'cistorior view uf n larj;i', llattciicil s|ii'ciiiiL'n of tlio tyiic of (SI. Ji'ii/iur'ls'ini

Wctlicrby, shuwiiig the tixwl iiiiimilos. (Oolh W. and Sp.)
Thr li;isp, showing the angles of the axial c iial to be intiiiadial. (Coll.

Mr. K. II. Vaupel.)

Oi.Yi'TocHi.sTs MAH(!iN.\Tis Hillings 'J~!i

The type specimen; i)osti'ii,-la(ern! vimv. (.M'ls. (ii'ol. Snrv., fiuiada.')

Glyi'TOckisi's F.M'v.iiKLLt Millcf 270

The calyx anil part of 'i' ■ st-m. (Coll, I. II. Harris.)

Gi.'. ,, .iiNis n; I Ail ACTVLUs Hall 270

A very lar^. f|»T... i. ' I'.'r Meek.)

I'osterior vi mt ^l .-alv.*. ( .'oil. I. II. Harris.)

Ventral aspi ■ : of u .-tli. ■• »'<:■,<]] ^;pccilnen (J). (Coll. K. (). I'lrich.)

Viutral aspt of Bii oMit ^;.eeimon (}). (Coll. W. and Sp.)

I'ortions uf the anas, slw.\ i-s i;overini_'-plates (f). (Same collortion )

Gi.Yi'T()cKi.vr8 HAMULosrs Hillings 27.'J

One of the type siieeiniens ; lateral view. {Mwf. Geol. Surv., Canada.)
Another type siiccimen, showing the raniilieations of the arnia. iSamo
collection.)

Gi.vi'TocniNfs oRNATi'H Hillings 274

The typr apoeimeii ; anterior view. (.Miis. Geol. Surv., Canada.)
I'osterior view of same specimen.

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PLATE XXI.

t PacH

l'r.ll|(iI.VI'T(M IXIK lllLLINIlNI \V. 1111(1 Si '1-7

Viu. 1". I'ostiMior viuw of ii H|ici'iim'ii willi nriiM mid »tfiii. (^CuU. Juliii Sti'Uiiit,
now in tlio Ciumila Hiirvfy .Musi'uiii iit (Jltiiwa.)
V>. AiiotliiT si)t.'('ini(!ii ill tlio sauiu uolloctiun, sliowiiig tliu left iKistcro-lntornl
ray uml niial iiiturradiug.

I'KHiriLvrTociiiNrs I'ltmcfH (ItilliiiHs) 278

'i. Xhu tyiie siifciiiipii. (Musoiim tii'ol. Siirv., Ciuiiula.)

Oi.vi'TiicmNiH DvKui (?) 271

M<(-c. Yonnfr s|)i>tiincns, jirolmljly of U. Ihieri (J).

;i./. Tyiic of Miller's />■«.»■)•;«(()( .S7<./;/eW (J). (Coll. H. A. MilliT.) .... I'TZ
;ic. Typo of .\Mli'i'.s I'l/iiinn-iitiii Slmffin, var. f/iriiiniiiiii ((). (Saiuo collection.)
;)/'. A soincwliat largur Bpooinicii (f). (Coll. \V. ami Sji.)

(il.Vl'TlM (tINUS IIKCAIIAl TVI.IH Hall 27(1

■|.(. ItiiiiT floor of till' ilorsal oiij) (if). (Coll. K. (). I'lrirli.)
Vi. Iiit.'vior vii'w of till! Iiasal <!ui> (p. The aiiglos of tlio axial canal directed
iuterradially. (Coll. W. and Sp.)

Gl.YI'TOCBIJfUS FOHNSIIBLLI Millct 270

r«. Interior view of the basal eiip (|t). Tlio angles: of tl.u axial canal directed
radially. (Coll. ! M. Harris.)

(ii.vi'Toi uiNid OiKisi Meek 271

G. Calyx, showing the posterior side of it largo, hitili^j ornanientcd specimen.
(Coll. K. O. Ulrich.)

CoMi'soiui.vuH MMMIF.N8I8 S. A. Miller CIR

7". Tlio type specimen; jiosterior side. (Coll. I. H. Harris.)
"/'. Anterior view o." another specimen. (Coll. \V. ami Sp.)

Co.Mi'soriii.vrs HAUiiist .S. A. .Miller C17

8'(. One of the typo spccimer.'i; lateriil view (fl). (Coll. 1. H. Harris.)
8A. rosteri-i" view of another type specimen J). (.Same collection.)

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PLATE XXII.

Pace
Mariacrinus W'arreni Riuguebcrg 283

Fig. 1. The type specimen. (Coll. Dr. E. N. S. Kingueberg.)

Mariacrinus Cableyi (Hall) 282

2a. Postero-latoral view of calyx. (Coll. I. 11. Harris.)
24. Anterior view of same specimen.
2c. Ventral aspect of the same.

Technocrinus 8PINUL0SUS (Hall) 305

3. The type specimen. (Am. Mus. Xat. Hist. N. Y.)

Mklocrinus baisbridoknsis H. and W 297

4ff. The type specimen ; side view. (After Hall and Whitfield.)

Ab. Dorsal aspect of same.

Ac. The arms. (After Hall and Wliitfield.)

Melocbinus gracilis W. and Sp 298

6. The type specimen; side view. (Coll. J. M. Clarke.)

Melocrinus CALVijfi W. and Sp 300

6. The type specimen. (Coll. Prof. S. Calvin.)

Melocbinus Tifpanvi W. and Sp 299

7(1. The type specimen; right posterior view. (Coll. A. S. Tiffany.)
76. The basals of same.

Melocrinus parvus W. and Sp 303

8. The type specimen ; anterior view (|i). (Coll. W. and Sp.)

Melocbinus oblonous W. and Sp 300

9. Lateral view of a very elongate calyx. (Coll. W. and Sp.)

Melocrinus obconicus Hall 302

10(1. Lateral view of calyx, (Same collection.)

lOi. Ventral aspect of another specimen, (Same collection.)

10(!. The basals.

sasaaityg!

MELOcRiyus RoGMERi W. and Sp 301

Kig. llfi. Lateral view of calyx. (Same collection.)
11/'. Ventral aspect of same specimen.

Melocbincs oblonous W. and Sp 300

12. The type specimen; lateral view. (Coll. W. and Sp.)

MAOBOSTVLOCIUMUH FASCIATL'S Hall 288

13. Lateral view of calyx (i«). (Coll. W. and Sp.)

JIacrostylocuixus stkiatus Hall 287

14a. Latcr.al view of calyx (p), (Same collection.)

11/). Posterior view of anotlier specimen (}'). (Same collection.)

He. The basals.

Mackostylocrinus OBANur.nsus Hall 289

Lw. Lateral view of calyx (Ji). (Coll. W. and Sp.)
loll. Anal view of same specimen.

Macrostylocrixus Meeki (Lyon) 290

1C«. The type specimen; lateral view. (Coll. Horden Institute, New Provi-
dence, Ind.)
ICi. Dorsal aspect of calyx. (Coll. Sidney S. Lyon.)

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PLATE XXIII.

h

Melockinis nodilissimcs (Hall) .

PAOK

2U5

rig. 1. Tlie type siocimon. (Amer. Mus. Nal,. llist.)
-. Diaginiii she iviiig tliu ai'rangeiiu'Ut of the plates.

3. roitiou uf Oil .' of the radial trunks, showing the origin of the arms. (After

Hall.)

MELOCRINUa PACIITDACTVLU.S (Hall)

4. The structure of the radial truidis and the origin of the arms. (After Hall.)

5. The type specimen of " Miirlni-rhiiis " jxiurlddcti/liis Hall. (After Hall.)

Mahiackini's i'lvmosus Hall

C. The typo specimen. (After Hall.)

7. Dorsal cup of a larger specimen. (After Hall.)

290

284

Macbostylociiixus orxatus Hall 28G

S'l. The type specimen. (After Hall.';
84. One of its radials, enlarged.
8c. A portion of an arm, enlarged.

Macrostylocrinus FusiBRAcniATus Eingueberg 291

9. The type specimen. (Coll. Dr. E. X. S. Ringueberg.)

10. A smaller, somewhat distorted specimen. (Same collection.)

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PLATE XXIV.

Hadbocbimih Diitri'ii Lyon 328

Till' typo spoc'imon ; dorHal aspoct. (Coll. 8. S. Lyon.)

II.uiKiii'iiiMtM pi.KNissiMi'H I.yon . 32S

'I'liij typo spiTimi'ii; dorsnl nspoot. (llcili. S. H. Lyon.)
Iiiiiur lliior of dorsal oup. (Hanio oolloctioii.)

Tkciinocbi.ni'h A.NiniKWHi Hall 300

The typt! specimen, .it'tiT Midi. (From a gutta pcrchn oast made from
a natural iiuudd in aaiulstono.)

.Mkloihini's r.vciivo.vcTYi.ti* (Hall) 20(1

Tlic typo specimen. (After Hall.)
Another specimen. (.Vni. Mua. JJat. Hist.)

Mkloiuims nAiNMKiixiKNsm Hall and Wliitf 297

The specimen described by S. H. Williams as Mihrriiiun Chuh'i. (N. Y.
State Cabinet of Xat. Hist.)

(?) Stklii)io(.uinit» AiiouTL's (Walcott) . . 280

Tho typo specimen. (After Walcott. Coll. Mus. Comp. Zool.)

Allocbisus TYi'i's W. and Sp 307

Side view of one of the types. (Coll. W. .ind Sp.)
liasal view of same specimen.

AtLocuiNus Benedicti S. a. 'Miller 308

, Side view of calyx. (Same collection.)
Uasal view of same specimen.

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PLATE XXV.

Pack

DoLATOCBiNus ExcAVATus W. and Sp 321

V\g. 1. Dorsal aspect. (Coll. Victor W. Lyon.)

DoLATOCBisus JIarsiii, var. iiamiltojjensis W, and Sp. . . . 314

2(1. Dorsal aspect. (Coll. Victor W. Lyon.)
26. Ventral aspect of the same specimen.

DoLATOCEiNi's TUBEBCULATus W. and Sp 324

3. Dorsal aspect. (Victor W. Lyon.)

DOLATOCBINUS SPBCIOSUS Hall 323

id. Dorsal aspect. (Coll. W. and Sp.)
4i. Side view of the same specimen.

DoLATOcBiNus MA,ioB W. and Sp 322

6. Dorsal aspect. (Coll. Victor W. Lyon.)

DoLATOCBisus Lvoxi W. and Sp 314

Ga. Dorsal aspect. (Same collection.) ,

66. Ventral aspect of another specimen. (Same collection.)

Cr. Side view of the same specimen.

6:1. I'ortion of the tegmen, showing the slits ; enlarged.

DOI-ATOCRINUS CANADENSIS WhitCaVCS 315

^ In. Dorsal aspect. (After AVhiteaves.)
76. Ventral aspect of same specimen.

Stebeocbinus tbianoulatus Harris 325

8a. The type specimen. (Museum Davenport Acad. Nat. Sci.)
86. Side view of same specimen.

Stebeocbinus Barbisi W. and Sp 326

9((. Side view of a fine specimen. (Same collection.)

96. Ventral aspect of another specimen. (Coll. W. and Sp.)

Centbocbinus pentaspinus Lyon 309

10(1. The type specimen ; dorsal view. (Coll. S. S. Lyon.)
106. Side view of same specimen.

10c. Side view of another specimen in the Lyon collection. (Described as
Actinocriints multkornus.)

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Hp'.Kivir PTir,!ii:e '.'i E^stfti,

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PLATE XXVI.

PA(iE

DoLATOCBiNus Mausiii Lyou 312

The type speeiinen; posterior view. (Coll. S. S. Lyoii.)

Dorsal aspect of same specimen.

Ventral aspect of same.

Inner floor of the inverted basal cup, showing its derivation from 3 plates.

DOLATOCRINUS OLYI-TUS Hall 317

The typo specimen ; posterios view. (Am. JIus. Nat. Hist. N, Y.)
Basal aspect of another specimen. (Coll. J. 51. Clarke.)

DOLATOCBINU.S LIHATUS Hall 319

A somewhat flattened specimen. (Am. JIus. Nat. Hist.)

DoLATOCRiNUS TiiiADACTVLUs Harris 310

The type specimen ; anterior view. (Museum Davenport Acad. Sci.)
Another specimen, giving a posterior view of the calyx. (Same collection.)
Another showing the dorsal view of calyx. (Coll. W. and Sp.)
Ventral aspect of the same specimen.

D0LAT0CBIN'U.S ICOSIDACTYLUS W. aud Sp 319

Dorsal aspect of calyx. (Coll. V. W. Lyon.)

I'osterior view of the same specimen.

Ventral aspect of same.

Dorsal aspect of another specimen. (Coll. W. and Sp.)

DoLATOcuiNus LACU8 Lyou 311

The type specimen ; anterior view. (Coll. Sidney S. Lyon.)
Dorsal aspect of the same specimen.
Ventral aspect of same.

DoLATOCKiNus ExcAVATus W. and Sp 321

Inner floor of the ventral disk. (Coll. V. W. Lyon.)
Inner floor of basal disk.

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PLATE XXVII.

Batocihnus (iranuis (Lyon)

PAor.
381

Fig. 111. Lyon's type specimen, — a fine example with arms
V>, I'ortion of an arm from near the top, enlarged.
I'd. Lateral view of tlie calyx.
2li. I'osterior view of a specimen with anal tube.

368

llATocKixuH IC08IDACTYLU8 Casssday

3ff. Lateral view of a largo specimen.
3!>. Dorsal aspect of anotlier specimen,
3e. I'ortion of the anal tube.

Datocbim's iniiEouLABis Casseday 309

4rt. Posterior view of tlio calyx, somewhat cnlargetl.
4i. Lateral view of the same specimen.
4c. I'ortion of the anal tube.

Uatockints TURBisATi's (Hall) 375

6a. Posterior view of the calyx.

6b. Lateral view of another specimen.

5c. Antero-lateral view of a specimen with arms.

BaTOCBINUS TURDINATU8, Var. ELEOANS (Hall) 370

C((. Lateral view of tlio calyx.
6/'. Posterior view of tlie same.

Batocbixus cANTONENsis Miller and Gurley

7«. Posterior view of a specimen, Bhowing anal tube,
111. The same view of a specimen with arms.

Batocuivus clypkatus (Hall)

Hn. Lateral view of the calyx.

84. The same of another specimen (variety B. piijnilatiia).

8c. Anterior view of a more wheel-shaped specimen.

S(l. Posterior view of a yonng specimen (typical form).

8e. Lateral view of a small specimen with arms (variety B. inomatus.)

(All the specimens are in the collection of Waohsmuth and Springer, except
that of Fig. la, which is in the Lyon collection.)

383

380

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PLATE XXIV.

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IIaurochinuh DiHciH Ljon 32H

Fig. 1, The tyiMj spccimon ; dorsal aspect, (Cull. 8, S. Lyon.)

lI.vDiiDruiNin I'l.KNiHHiMi'H Lyoii 323

'Jii. Tlie type Hpi'ciiiu'ii | ilorsal aspect. (C'dU. S. 8. Lyon.)
ill, ItiMur tluur uf dorsal oiip. (Sauiu collection.)

Tecii.nocri.M's Anouewsi Hall ... 300

3. The typo specimen, after Hall. (From a gutta purchft cast mode from
a natural nuniM in HamlHtonu.)

^MeLOCUIN'US PACIIVllACTVLUS (Hall) 2'J(i

4(1. The typo specimen. (After Hall.)

4A, Anotlior specimen. (\m. Mua. Sut. Hist)

Melocbinl'h iiAiNiiHiiKiR.Nsts Hall and Wiiitf 2'J7

5. The specimen described by 8. H. Williams as MilorrinuH Clmkii. (N. Y.

State Cabinet of Nat. I list.)

(?) Stelidiocui.nuh ARfiuTi'.<i (Walcott) 280

6. The typo specimen. (After Walcott. Coll. SIus. Conip. Zool.)

Allocri.nus typl's W. and Sp 307

"a. Side view of one of tho typos. (Coll. W. and Sp.)
111. Uasal view of same specimen.

Allocrinus Henedicti S. a. Miller 308

8((. Side view of calyx, (Same collection.)
8i. Basal view of same specimen.

^1

PLATE XXV.

Paoi;
DOLATOCKINUS EXCAVATUS W. ailll Sp 321

Fig. 1. Dorsal aspect. (Coll. Victor W. Lyon.)

DoLATOCHixus Makshi, var. iiamilton'knsis W and Sp. ... 314

2'i. Dorsal aspect. (Coll. Victor W. Ljou.)
2li. Ventral aspect of the same specimen.

DoLATocuiNi-s Ti-DKiifiLATus W. and sp 324

3. Dorsal aspect. (Victor W. Ljon.)

DoLATOCRINl-S Sl'ECIOSl'S Hall 323

4(1. Dorsal aspect. (Coll, W. and Sp.)
44. Side view of the same specimen.

DoLATOcuixus MAjou W. and Sp 322

5. Dorsal aspect. (Coll. Victor W. Lyon.)

DoLATOcniXL'.s Lyoxi AV. and Sp 314

C((. Dorsal aspect. (Same collection.)

6/1. Ventral aspect of another specimen. (Same collection.)

(iiv Side view of the same specimen.

C</. Portion of the tegmen, showing the slits; enlarged.

DoiATOCUiN'us CAXADENSis Wluteavcs 315 - '

7'(. Dorsal aspect. (After AVliiteaves.) , . ,

7b. Vent'.al aspect of same specimen. !

Stereocuixl'.s TRiA.NouLATrs liarris 325

80. The type si)erimen. (Museum D.ivenport Acad. Xat. Sci.)
8//. Sic e view of same specimen.

STEREOCRiNrs iJAHKLsi W. and Sp 32C

9('. Side view of a fine specimen. (Same collection.)

9/j. Vontr,al ai pect of another specimen. (Coll. W. and Sp.)

Cextrocrixus rENTAspiNTS Lyou 3(19

10'(. The type spwimen ; dorsal view. (Coll. S. S. Lyon.)
10/(. Side view of .^ame specimen.

10<-. Side view of an idier specimen in the L)-on collection. (Described as
Acfinocrluus mi /ficonius.)

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8.

PLATE XXVI.

Pack

DoLATOCRisus Maksiii Lyon 312

The type specimen; posterior view. (Coll. S. S. Lyon.)

Dorsal aspect of same specimen.

Ventral aspect of same.

Inner floor of the inverted basal cup, showing its derivation from 3 plates.

DOLATOCRINUS OLYPTUS Hall 317

The type specimen ; posterior view. (Am. JIus. Nat. Hist. N. Y.)
Basal aspect of another specimen. (Coll. J. Al. Clarke.)

DOLATOOBISUS tlHATUS Hall 319

iV somewhat flattened specimen. (Am. Mus. Nat. Hist.)

D01.ATOCRINU8 TKIADACTVLU8 Harris 316

The type specimen ; anterior view. (Mnseum Davenport Acad. Sci.)
Another specimen, giving a posterior view of tlie calyx. (Same collection.)
Another showing the dorsal view of calyx. (Coll. W, andSp.)
Ventral aspect of the same specimen.

DoLATOCRiN'us icosiDACTYLus W. and Sp 319

Dorsal aspect of calyx. (Coll. V. W. Lyon.)

Posterior view of the same specimen.

Ventral aspect of same.

Dorsal aspect of another specimen. (Coll. W. and Sp.)

D0LATOCBINU.S LACus Lyon 311

The type specimen ; anterior view. (Coll. Sidney S. Lyon.)
Dorsal aspect of the same specimen.
Ventral aspect of same.

DoLATOCBiNus ExcAVATUs W, and Sp 321

Inner floor of the ventral disk. (Coll. V. W. Lyon.)
Inner floor of basal disk.

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PLATE XXVII.

HaTiiC'UI.NI.S (iUANDIS (Lyoii)

rAOK

381

V\g. l;i, Lyon's type speoimcii, — a fine exniiiiilo witli ariiis

V'. Portion of an nrni from near the top, enlarged.

2ii. Lateral view of the calyx.

21/. I'osterior view of a specimen with anal tube.

Uatocuini's ao8ir)AcTvi.is Casseday 30S

flrt. Lateral vieiv of a large specinion.
SI/. Dorsal aspect of another specimen.
3c. Portion of the anal t\ibe.

HATOCKi.Nirt iiiUEiirLAiiis Casscday 300

4(1. Posterior view of the calyx, somewhat enlarged.
44. Lateral view of the same specimen.
4c. Portion of the anal tube.

Hatochincm TiiiiiixATis (Hall) 37A

C«. Posterior view of the calyx.

61/. Lateral view of another speoinien.

6c. Antero-lateral view of a specimen with arms.

BaTOCIU.VIS TURDIXATl'8, var. ELEQANS (Hall) 370

C«. Lateral view of the calyx.
61/. Posterior view of the same.

Latocbikus cAxToxEjfsis Miller and Gurley . . , , . .

7(1. Posterior view of a specimen, .showing anal tube.
111. The same view of a specimen with arms.

Batocrint-s CLvrEATus (Hall)

Sa. Lateral view of the calyx.

8I>. The same of another specimen (variety S. jwiiillhitiis).

8c. Anterior view of a more wheel-shaped specimen.

8(/. I'osterior view of a young specimen (typical form).

8c. Lateral view of a small specimen with arms (variety li. inornatiis.)

(All the specimens are in the collection of Waelismuth and Springer, except
that of Fig. la, which is in the Lyon collection.)

383

380

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PLATE XXVIII.

LOBOCRIKUS LONGIROSTKIS (Hall) •142

Fig. la. Anterior view of a specimen with arms, anal tube, and column. (Mus.
Comp. ZoOl.)
lb. Portion of an arm with the pinnules, enlarged.
Ir Anterior view of the calyx. (Coll. W. and Sp.)
1(/. Posterior view of the calyx. (Same collection.)
le. A very young specimen. (Same collection.)

Batocrujus lepidus (Hall) 372

2. Side view of the calyx, showing tlie bifurcation of the left jiosturo-lateral

ray. (Coll. W. and Sp.)

3. Posterior view of the calyx. (Same collection.)

BATOCRiyus QUASILLUS Meek and Worthen 372

4(1. Side view of the calyx. (Same collection.)

ih. Specimen showing the anal interradius. (Same collection.)

Patocrinus .uqualis (Hall) 371

5. Posterior view of the calyx. (Same collection.)

6. Specimen with arms. (Mus. Comp. Zobl.)

Batocuinus 81-n.EQUALis (McChesncy) SC>0

111. Fine specimen with arms. (Same collection.)
7b. Portion of an arm with the pinnules, enlarged.
Sa. Lateral view of the calyx. (.Same collection.)
8/). I'osterior view of the same specimen.

9. A specimen with portion of anal tube, and showing the bifurcation of the
right postero-iateral ray. (Same collection.)

B.ATOCKiNus TUUERci'LATis W. and Sp.

379

10,1. Posterior view of the type sppcimen. (Coll. W. and Sp.)

lOi. Another specimen, showing tlie loft postero-iateral ray. (Same collection.)

S'

<1

PLATE XXIX.

Fig. In.
1/-.
le.

2I>.

2d.

3,1.
34.
3c.
3</.
3c.
3/.
3o.
4.

6</,
54.
5<-.
6d.

9a.
94.

Pack

DizvoocRixus DODECADACTYLVs (Sleek aud Wortheii) 43-'

Lateral view of tlio calyx.
I'osterior view of tlie same.
Ventral aspect of same.

Dizvdocuixus AXDHEWsiAjjus (McCliesnej') 433

Posterior view of the calyx.

Lateral view of another specimen.

A specimen with arms, showing one of the postero-lateral rays.

Vosterior side of a specimen with arms.

DizYoocKi.Nus U0TUNDU8 (Yauilell aud Shum.) 431

Dorsal aspect of tlie calyx.

Ventral aspect of the calyx; the plates but slightly convex.

Ventral aspect of a specimen with distinctly convex plates.

Lateral view of the calyx.

Another specimen, having part of the anal tube preserved.

Side viev; of a specimen with twenty arms.

A largfir specimen with twenty-two arms.

Ventral aspect of a more discoid specimen (type of Actitiocrimis oblatus Hall.)

liA^CKIXUS LAL'KA (Hall) 384

Large specimen with arms.
Anterior view of tlie calyx.
Lateral view of another specimen.
I'osterior view of a more conical specimen.

EiTiiocHOCKiNus Chkistyi (Shumard) 409

A young specimen (f ).

Ei-TROcnocRiNu.s LovEi \V. and Sp 412

A young specimen ({).

LoBocKi.vrs .EQuiBBACHiATus (McCliesuey) 440

Posterior s'de of the calyx.
Lateral view of another specimen.

LonocKixi's .sQuiBKAcniATus var. asteriscus (M. and W.) . . 441

Dorsal aspect of the calyx (.anal interradius the lower one).
Ventral aspect of the calyx.

(.\11 specimens in the collection of Wachsmuth and Springer.)

I

PLATE XXX.

Paoe
Batocbin'us JIachhidki \V. ami Sp 37(5

Fig. 1. Specimen with arms, stem, and cirri.

2. Aiiotlier specimen witli arms and stem.

3. Ventral aspect of calyx f };.

I?AT0CKiN'fs MuxurLUs Hall 3,s;j

4n. I'osterior view of tho calyx.
46. Lateral view of tlio s.ame.
5. Specimen with arms from Bono, Ind., jjrobably of tliis species.

Uatockinus rocuLUM S. A. Miller 373

6. Specimen with anal tube, arras, and stem.

Louociuxfs Yaxdelm (Shumard) 441

7a. Tlie type specimen, showing anal side.
Ih. Dorsal asi)oct of the same specimen.

LoiiocitixiB uonusTi » \\. and Sp 43(3

8((. The type specnnen ; antero-lateral side.
8A. I'osteriur side of the same.

LouocHixLs IlAdEui (McChcsupy) 445

i). I'osterior side of the calyx.

to, Antero-lateral side of .another specimen.

LonocRixLs si'ixiFKULs W. and Sp 439

11. One of tho typo specimens, siiowing the anterior side.
IL'. Another type specimen, showing the posterior side.

JIacuocuixus .iucuxdu.s (S. A. Miller) 454

1.3. Calyx and anal tube ; anterior side.

14. Specimen with arms ; antero-lateral side.

jrACKocKixrs VEuxEuiLiANus (Sliumard) 450

l.j. Largo specimen with arms and an.al tube.

If). Another specimen; the tnbe somewlwt inflated.

1 7. I'osterior side of tho calyx ; the plates but little convex.

15. Anterior side of the calyx; a very large, nodose specimen.

(All the specimens in the collection of W.achsmuth and Springer, except that
of Fig. 7, which is in tho Lyon collection.)

4

-^

i

+

i

lit

i\

T

4

T

4-

PLATE XXXI.

i

I'MH

LiiiHK iiiNiH NASiiviLi,.!! (Troost) 435

Vig. 1, Kiiiu 8[iociiuoit with atom aud aiml tube.

LoDocKINirs NASIIVILL.Ii Vlir, HL'HTUACTUH (WllitC) 4it(i

2". Posterior side of a Bpecimeii with atom and anal tube.
21). Portion of a deformed stem from another gjicoimeu.

LoDOCRiNVH PVRiFOHMiH (8huranrd) 4,37

3«f. Anterior viinv of tht> typical form | part of atem and nnal tube preserved.
3/'. Poati'rior sido of a varietal form.
;)('. Anterior view of an elongate variety.
Hil. Perfect siiocimen witli stem, arms, and anal tube.

3i'. Section of an arm (enlarged), showing tiio spinous processes along the sides
of tlio free brachiala.

Batocrisi-s pistilluh M. and W 378

4(1. Posterior view of tlio calyx.

46. Anterior view of another specimen.

(All the specimens in the collection of Wachsmuth and Springer.)

? '.

A)

• r i

i I

^

PLATE XXXII.

Page

EcTROCHOCRiNus CnRisTvi (Shumanl) 409

Fig. la. Lateral view of a specimen, showing arms, stem, and anal tube.

l/>. A specimen preserving tlie extremity of the anal tube ; viewed from above.
Ic. Posterior view of the calyx.

EuTRocHocRiNus LovEi (W. and Sp.) 412

2((. Lateral view of the type specimen.
21). Anterior view of the calyx.

EiTuociiocRivu.s CiiRisTvi var. trocuiscus (M. ami W.) ... 410
3. Posterior view of the calyx.

ElTUOCnOCRINUS 1-LAN0DI8CUS (Hall) 411

4'(. Ventral aspect of the calyx.

4b. Dorsal aspect of same ; basals and first radials broken away.

(All specimens in the collection of Wachsmuth and Springer.)

'i

i

I

PLATE XXXllI.

Faoc

DiZYMOCiiixrs OKioiNAitus W. awl Sp. , , , 421

I'ig. 1". Tlic type speciiULMi.

1/'. Specimen with one arm paired, the others single.

EuKTMocHi.NTS i.NTKUMEDUs W . and Sp 404

2ii. Side view of a specimen with arms.

'2b. Another example.

2c. Another specimen; top view, showing the spatulate, infolding arms.

DizviiocuiKi-s MtVTaoMKKYKXsis (Wortlicn) 428

3. Specinrcn witli arms, anal tuue, and stem; from Crawfordsville, Ind.

4. Another specimen with arms (all paired but one) ; from Keokuk, Iowa.

Dizv(ioti!iNi-.s MO.VTOOMKRVENSI9 var. ixiiiUAcuiATi's W. and Sp. 429
5((. A somewhat abnormal specimen with arms and stem. (Coll. L. A. Cux.)
54. Another speoimen with arms. (Same collection.)
5c. Posterior view of anotlier specimen.

DizvoocKixis iN'DiAXEXsis L. and C 415

Cm. I'ostero-lateral side of a specimen with arms.
W. Calyx of another specimen, exposing anal side.

DizioocuiKus ixDiANExsis vat. SIMPLEX W. and Sp 415

7. Anterior view of a specimen with arms.

Di/.V(ioci{ixfs CAXTOXENsis W. and Sp 423

M". Specimen with portions of the arms, and showing anal tube.
8//. Another specimen, showing the arms and anal tube.

DizviioiRixrs niTrijiiiXATis (Hall) 427

0. Lateral view of the calyx.

DizvuoiKixis WiiiTEi W. and Sp 41i>

Kid. Specimen with arms from the Keokuk group of l?ono, Ind.
1(1/;. Lateral view of the Pidyx. (Same locality.)

11. Posterior view of the calyx. (Specimen from the Warsaw limestone of

Kentucky.)

DizYoocmNTS FACETi's Jlillor and Gurley 418

12. Specimen from Canton, Ind., showing anal interrodius.

(All specimens in the collection of Waehsmuth and Springer, unless other-
wise stated.)

ll.

I

^

i'wM!

IMr'.yti !>!-:.;

!

»."^

PLATE XXXIV.

EnKTMOCIilXlH rAf.Vri'UiMiKM (Mull)

aor.

I'ig. Irt. r.aturut viow of a Hpci'liiicii Imviiiy tlip loivir part nf tlic iiriii.s picstivpil.
l/i. Opposito view nt the HpiMtiiiim, NljnwiiiK aiiiil tiilii'.
U. A spei'iiiicii .sIuiwiriK thv pailillc-sliapnl tips of tlio anus.
;». Lateral view (if the calyx, sliowiii^- lli. excciitrii' positiuu of the auiil tube.
4. Showing tho curvatmv of thi' anal tiibo.

Kl^KT.MlM liiNiM cKANii.irKnrs W. and S|

Bit. Lateral view of the typo ^^pcciiiien.

bit. Ujiposito side of the .spoeinien, sliowiiig tiie paddle shaped anus and anal

tube.
6c. A detached plate showing suvfaee ornamentatiun.

Eiti-.TMocuixiH cALYcfi.oiiJEs var. .Noijosi-s \V. and .'^p

C. Posterior side of the type speeinien.

7. A specimen showin;,' the anal si(h'.

8. Lateral view of a very elongate specimen.

3'JO

390

KuKTMociii.Ms I'u.KciiiAvis S. A. JliUcr

0. Lateral view of tho calyx.

111. Posterior view of another specimen.

Or.X.N.HOfUIKlS KE.NTlCKIKXaiS (Shuni.)

1 1 . Dorsal aspect of tho calyx.

12. Hi^dit posterolateral side of another specimen.

13. Aspect of tiki ventral disk.

-10,")

r.iH

GeNN.KOCUINIS F.LXMAIilS (Hall) . .

It. Portion of the dorsal cu])

AcArorHixis ameimcanis \V. and Sp.

L"((. Anterior side of the typo specimen.
liili. Posterior side of tho samo specimen.

AcAcocRi.vas Eluobi W. and Sp. . .
IG. The type specimen.

549

515

51,-

1-A<,II

AoBoi HrNi'i KiKoA!** (8, A. Miller) |so

Kin. i'li, I'oHti'riof HiiUiof tlio typi! spociiiioii.
I't/, Vuiitnil iispout ut' tliu Hiuiic.

LoBiicKiNUN iNKLATiTu (Uowley 1111(1 Hare) ,^^^

tXii. Aiituriur viuw of tliu typu apt'uitucn,

IH/i. LutiTiU view of tlic speclmou iloscrilied by Kowloy iiiul ll,iri> an nnlii^riiiiiii
liiil/iiiiiiiii.

Pi»voocKiNUn UiKLKvi (S. A. Miller)

11). Thu ty|Ki spouiuion.

(All tliu spcciiiR'iis aro In tlio ooUection uf U'achsimith and Springer, except
tlioHO repruHiMiti'd liy Ki«s. lH,i and IS//, wliitli aii' in the posHcssiiin of Jlr.
U. U. Uowloy, and 1'^. ID, wliich in owned iiy Mr. 1''. A. Sampson.)

4TJ

^ 111

i

■f

Fig. 1,

•I

3.
4.

8.
9.
10,
11,

12.

i;!.

n,
i.»,

ir,,

17,

i.s,

2i\

PLATE XXXV.

I'.\.,n
M.vcuociiiNUS KoxiNCKi (.Sliuniard) 117

Specimen with aiidl tube, firms, ami stem. (.Miis. Comp. Zuol.)

Calyx, sliDwiiit; anal side.

Anuther speeimen, showing anterior side.

JlALitocurxis i,A(iiNiii.i's (Hall) l.j.'i

Calyx, postero-lateral side.

DizYdiMuixis iNDiANKxsis (Lvon) 11">

The arms of tlie two posterior rays nearly all paired; tho.se of the tliree an-
terior r.iys mostly single in the speeimen.

DizKiocuiNfs nKcouis (Miller) 420

Caly.x, in a sidi; view.

DizviioiuiMS EiidSi's (Meek and Worthen) I.io

Calyx, showing the postero-lateral ray, and tlio anal interradins. (.\ speci-
men from Taylor Co., Ky.)
Dorsal aspect of tlie same siiecimcn.

DiZYdocuiMs MiTAiiiMs W. and Sp 4l"J

Anterior side of the calyx.
Specimen witli arms in a side view.

.Specimen with an^U tnl)p, and most of the arms paired.

Specimen in which one half of the arms are single.

DizvoocniNfs Wnnr.i var. didactvms W. and Sp 420

Specimen witli thi' arms all jiaired.

Specimen in whieii most of the arms arc single.

Di/.viiocKixi's oKioiXAitirs var. aihi.tis V.'. and Sp 422

Speeimen with most of the arms paired.
Anotlier in wliich most of the arms are single.

HizvoocKixis ixioxKxsis (Worthen) 424

Anterior side of calyx.

.\nal side of a crnshed specimen.

Side view of another specimen.

I'osterior side of a si)eeimen with arras.

.\notlier specimen, showing posterior side.

i

Dizviioiiiixi-.s i-xiiixKNsis var. divai.is (S. A. Miller)

Fig. t^l. .SiweiiiuMi with arms, slunvini. uiituriur side; llio arms altur.uitoly naired

--. Side view of tho calyx.

I'.'l. Dorsal aspect of a specimen in which all the arms are paired.

24. Specimen with some uf the arms paired.

(All specimens in the collection of Waehsmuth and Springer, unless other-
wise stated.)

Tacib

41'6

4>

Ji

i

PLATE XXXVI.

EltKTMOtmXUS HKMIllHAl IIIAllX V.lr. KXTAXSIS W. ailil Sjl. , . .

Fi,:,'. 1. Ventral aspect of a largo siieciiuen, sliowini; tlii' fdkliiifj of tlip Trins Tlio
radial trunk uf aii Eiu-lnttiicrinus iiii/Zi/n'oi/iiiitiis Ivin,; on tii]i.

EuEnioi liixi-s CMC (Hall)

i"'/. Siiociiiicii with arms ami coluniu.
-Ii. I'osterior side of the calyx.

l-AC-.K

3'.K>

3'.)3

KiiKTMiH KIMS NEiiLKCTi's (Muck aiul Wortlicii)
3. Anterior side nf the calvx.

.•!1)1

Kiir.r.MoriiiMs ( i.dci.iA (,IIall)

31 IS

•l'(. Spccinien witli arms and (■(dnmn.

■III. Side view of a si)mi.'uliat cnislicd si)ecimen.

Kiii-T.MOiitiNis idiiiiii.is (Hal!) 3'.)!)

u'l. Ventral aspect of the calyx.
M. Dorsal aspt'ct of the same.
iir. Lateral view of another speeimen.
(!. Kim- siiceimeii witli arms.

Ki!i:iMc)i Kixis i.ionnsiA ^Hall) 4iil

7". Spccimi'ii witli part id' arms (hasals and r.adials not jireserved).
'Ii. I'osterior side of the c.ilyx.
"'■. Dcu'sal aspect id' tlio same.

Maiiiihijims oilMMll'iiiiMis (Hall) I I'.l

.S. I'osterior side of the calyx.

Kki'.t.miii'UIM's Ki'oosrs \V. and Sp |(IJ

'.)(t. I'listerior siclr of till' type spreinien.

Wi. \'i'ntial aspect nf the calyx. iSame specimen.)

'J': The base of the same specimen.

I'.ni:rMiiii;iMs Mixoit \V. and S| ,'J'.il

10<i. I'osterior side of the tyjie specimen.
Id/;. Antero-lateral side of another specimen.

KuiTMoiitiMS DKiur.ssis W. and Sp 3',|o

1 1'/. rosterior side of the tyjie specimen.

1 1//. I'osterior side of a smaller specimen, with more convex plates.

(.\11 tlie specimens in the collection of Waidismiith and Spriie,'er.)

"t'-m\-

PLATE XXXVII.

'i5

KiMJMiM liiMs i.TMijiiiAi iiiATi s v;ir. i;xr.\xsi> W. :iinl S;'. . . .

ri,'. ]ii. S|ii'oimuii Sunn llic l!iirliiii,'liin ainl Ki'uUiil; liuii.sitiuii licil ; ilcrs.il asiiict,
1'.. Side vii'W of llio I'alyx; irum saiiio \ifA.

lOuKTMl" ItlMS l!i::Mllii;.M lllATl ,s (ll.illi

L'.i. I.atrral \ iow of a s|irciMirn Injiji tin' I'lipcr limliiigtuii I.inu'stciiie.
LV.. Aiiuihci' exaiapK' Iruiii tlio saiai' lu'il.

Kur.iMiM iii.vi s MAiiXiKiirs Lyon ami t'lss

:!. .V lar:,'!' siu'cinnii, with rows of angular iioiU's fullowiiig the rajs ami tlu'ir
su'.iiUvi.sioii>,

Kiii:T.M(M uiMs liAMi i.dsrs ('Hall)

I'l. I'listi'rior siili' uC a lartrc calyx I'mia Tciiiicssi'i'.

•I''. Tlifsal aspcrt nf a liij,'lily uriiaiib'iitcil s[icciiiuMi from Inwa.

."'(. \vm fraLtiiii'iit, prol.ialily Ivluiigiiii,' to lliis speoii'.s (from Tcmicssci').

.-|A. Cniss-soctioii of it.

'>': V\t\yv jiortioii of aU'iilKT anii frai,'iuriit from tlio same locality.

.')'/. Th(-' cross-soi'tioii.

I'.iiirrMoi liivi -; matita (Hall)

('.■(. Sin'oimrii with arms; tli.- anal tulir l«'nt i^iitwanl.

ti'.. Spcpiuicn showiii;^ the natural curving,' of the anal tulie.

0'-. .V large calyx.

Kiirr\iori;iNr> ((ii;oxatis (Hall)

7'/. Dorsal asp. ,t of th" calyx.

7/'. .\iitcrior miIc of same.

7'-. Neutral aspect of amllicr siiccimiMi.

Mai |;oi lilNLS (.Mill A (Hall)

cS. .Vnterior side of the cah x.

Vm.i

ayti

;j8,s

3SC.

.?8:

.iii;i

4IS

'.hi.

KliKTMoenlVIS rl.lo (Hall)

.\nfcrior sirle of tlie calyx.

Ventral aspect (jf a iiiorr lohate sjiecimcn.

(.Ml specimens in tlie collection of Wachsiuuth and Sprinpor.)

3'.».S

"^ I

^^i^^M^i^

,<~>^^

I'U'. I",

•J/,.

:'./.

I'i'i.

V,',.

7l>.

I'LATK XXXVIII.

r>.,K

AnARII IKIIIM'* idNVKXl'R (llallt .VI8

Sill' vii'w iif tliii oalyx, luwl ll(ll•li(lll^^ of tin' iirins. ^

Vi'lltr.il iis[Hi'l cif llir fill) X.

Ai.Allh III IIIM '< IIIMIM- lllilll) . , . Tilt

A lilli' s|H'('illM'll with iU'lllH.

Vi'iiliiil ii»|»'i't 111' till' calyx.
I'listi'i-iiir siili' (pf till' riilyx.
Dorsal amiiTt <•( tlii' ralyx,
Side view (il (111' I'alyx.

A>i Mil' iil'IMM •> I'll! I'l.M'M (It;i11) . ril'J

Diii'sal \irw iiC till' ciil^ \.

Vi'iilial as|i('i't lit' till! saiiir S|iri'illl('li.

I'usti'iD-lati'ral siili' iif saiiii".

All Allli 111 IIIM s I'VII VMIHATl s (Hall) • fill*'

Siu'i'iini'ii Willi anus,
Idii'sal a>|)rrt 111 till' oalyx.
Vi'lltr.il a<|ii'rt 111' tlio piilyx.
I'litti'riiir siili' of a youii!,' spi'i'lnu'ii.
l)iirHal vimv nf saiiic.
Vfiitr.il asiHTt uf saiiii'.

.\i.Aiiiriii iiiNi 1 i'HMiniNV|.:xfs (Hall) TiOM

D.irnal viinv iif lln' calyx.
Siilc vii'W 111' aiiiitlicr s|K'ciiiicii.
Vi.'iitral asiii'ct nf saiiii'.

Ai.Aiin iHiMM .H siri.i.ATi's Hall .'ii!'^

Il.ii's il vii.'\v III' a s|ii'ciiiii'ii «illi arms.

.V .small S[ii'i'imrii with arms.

Diirsal aspiTl nf the calyx.

.ViMthcr siii'ciiiiiMi, shmviii',' the anal siilc.

'I'lii' simc, sliuwiiii; the ventral aspect nf the calyx.

(All li^'iires from .specimens in the colloccion of Waelisnuith anil Sprini,'Pr.')

li

4

}

^w^

f

I'LATK XXXIX.

I'A. 1

Ai.Mii' ■'' liixt > (.'.■iiKYl (li. and C.) ,"il(i

l-'i;;. 1". lljMil vli'U III llii ty|io siioi'iiiifli. (I,yi)M CulU'ctiuM. )
\/i. Silk' \ ll'W III tllf t-aiiir.

Ai.AiJi III M\i > iiiAssr.- Wctlirrliy . VM>

1''. Siili' \ ll'W III a l.ir;,'i' siM'ciiiHMi. (Cull. I,. A. i ■x.)
lY'. I>iirs,il asiiiH't df llif saiiir ^lll■l■iull.•ll.

">i, \uii III i;iM « r.M A\ Alls Hall ... i;'l

.i. Si.lr virw ul a h|'Liiiiiin Willi p'li'ally priil rinliii'^ anu.s. (Cull. W. ami Sp.j
I, hur^.il as|iri-l cil .iiiiithn- siirciiiiiii, (Sauif colln'tinii.)
.". I'l'isal asiiri't (if aiinlli'T. iS:inn' niUrclion.)

Ai..MM' I" i;iM^ .Mini iii^i >, v,ir. M \i aham.^i Wi'Vllirii Ills

(i Siilr \ low ol a lal;,'!- ."I" cillirll. |S;UllO Cllllfl-linll.)

Ai.AiiH 111 Ki.M > 1 iiNii IS W. ami S|i. . r,i>\

7. .\ line .■^[lOL'inirii wu!i Mij-.n^inum r.'i i\-.t, mi luu mai--.

f' ^||.■^t^ riui' vi.'W III the fah N. (Hntli siiuoiiiifiis in tin.' cull. W. ainl Sji.)

.\i.\M iM ~ \Viii:riii:M Hall I'.iii

'.I l>iii-al a^i I 111 a ^iii'i'inuii in whicli llii' m-'cuihI co.^taU .ur |iruiliiri.'il inln

l.ll-c miilrs. (Cull. 1,. A. Cu.\.)

^ -^'

WWBStBB9fBftBSP-^

" M . -

I'LATK XI..

AcAlili III lilM s sii,i;siii:s- S. A. MilUr I'.i'i

Ki>;. 1". A l:ii-,'i' siicciiiu'ii witli arms iiiul slcni.
I/'. DiM'sal ;is|M'ct cif anotliiT s|ii'i'iiiRMi.
l'-. N'.'iitral asiH'ct ol tlic calvx.

(,'.■) Ai.Aicii ■" i:iM , Mint I.I1-.I « Wcirtlic'ii I'.l?

2. Dorsal aspciM nl a vrry smnnili .■.ijiciiin'ii «illi |iurnipiis nl llir arms, liimi
Cantdii. 1ml.

Ai.AiMi 111 I!IM s i:i.i:i;a\s Wullirrliy "iHll

:■'. Porsal :i-|ii'ct III a s|ii'i'imrii Irnm ll.iliiilluii. 111.
:'•/'. \'iiitral as[iri'l nf thi' sami'.

.\i,Al: itlM s I ItAssl < Wrtln'iliy '',•'.'

■I. Tru'liU'ii (il a small s|iri'imi'ii Imm 'rriiiii'ssi'r ; tin- I'iukI gr'Hivi's nf tin' |in.s-
ti'riiir rays covorcil liy lartjc altornatt.' plati's.

.VdAiiii I" liiMs WniirJiiM ll.ill . . r.lii

.''./, l'n-.ti riiir siili' 111' a larj;i' s|ifrim('ii.

."I'l, Aiiti'riiir siilc dI' tlic saim'.

,V. jiiir.iil aspect of same.

,■)./. V'l'iitral aspect of same.

.Viaitii III liivi s AMi:i!i' A.MS, v.ir rMii:i!iisi» (Mall) IS'.i

(i. IVrsal 'ispi'ot of tlie caly.'i.

(.Ml tlio sppcimiMis in tln' ciilli'dinn nl Wai'lisiinitli ami ."^prin^'cr, I'Xi'i'pl lliat of
ri^'. o, which i.s i!i tlir Mu-i urn of (.'oiiiparativc /.ooliii;y.)

I

1

■.^■'v'*'

f

1

I'LATK XI, I.

All vim 1" IdSlH INKI.AITH il;lll

v.'. I'l. A l.U'gl' S|i('rllllrll Willi IinilH (\\\C Ul'lll!* bllghll.V I'UStul'Vll.)

lA. riisti'viiif nil'' III' till' imIvx.

|i'. l>iii'>iil aspi'i'l III aimlliii' .iiii'iiiiirii.

\'l. Tilt' millllllit 111 llli' Ir^'llli'll.

Ai. Mill 111 IIISI 4 III 1. 1, ATI- II. ill

'Jo. S|ii'rliiii'M \villi .iriiis ami mIiiii,

L'/.. I)iirs.il asiu'i't iif a larj,'!' ralyx.

'Jr. Vrlitiiil as|ii'rt iif saiur.

•J'l. Iniirv lliiur iif ilmsal ciiii.

Ai.Aiiii 111 KIM 1 1. KM Ills M. anil W

I'll. A lai-),'!' spiTimrii Willi anus
:u,. I'listcvior siili' (it im1\x.
.'Ii: l>iirsal asiiri'l of saiiir.

Ai. Mill 111 ItlNIs IIKI.I.AIIIFMA Mill

■I '. A '^iii'i'iiurii Willi iHiitiiiiis 111' till' alius,

|/.. rnsti'iliir si.li' 111' tlio calvx willi mir iii'iii atlachril.

•Ic I'listrrjiir siili' (if a sinallor s|ii'riiiirii.

■['/. Siile vifW of a lar;.';' siici'iiiicii.

Ainiiii III utM s m;i,i.ATiti:MA, vav. ma.ihii \V. ami
."i. \'i'iiti.il asiitrt iif n very nodose spci'iiiion.

I'^i.r.

■AfJ

vxi

I'lUl

"iiiri

1

(All Npi/ciiiiciis ill the colU'Laimi of Waclisiiuitli ami Sj. linger.)

i

1

i

s^.

o '^*^.

IMAGE EVALUATION
TEST TARGET (MT-3)

1.0

I.I

li;|2^

Ui

■ 4.0

2.5
2.2

18.

1

1.25 III U|,. 6

^

6"

►

^

^^

'/

Photographic

Sdences

Corporation

23 WIST MAIN STMiT

WEBSTER, N.Y. MSSO

(716) •72-4503

y
^

•

PLATE XLII.

Agaricocrixi-s amehicanus (EoBmer) 488

Fig. 1. Speeiiiieii witli anus, from Indiana.

2ii. I'listerior sule of the calyx (specimen from Tennessee).
2f>. Anterior side of another specimen (from the saaie locality).

AOARICOCKINI'S WlIITKIEI.DI Hall 49G

3. Ventral aspect of the calyx. (Illinois State collection.)

AOAKICOCRIXUS AMERICANUS, Vat. TUBEROSLS (llull) -189

4. Dorsal aspect of the calyx.

DOHYCRIXUS CORNKiERUS (Hall) 4^8

5. Specimen with arms and stem.

6. Postero-lateral view of calyx.

DOKYCRINUS QUIXQUELOBUS Hall 400

7. Side view of the calyx ; the spines broken away.

8. Lateral view of a specimen with arms.

9. Posterior side of calyx ; the spines intact.

DoRYCRixus suiiTCRiiixATUs Mcck and Worthon 400

10a. Antero-lateral view of the calyx.
lOi. Tosterior view of the calyx.

AoRor'Risi-s Cassedayi (Lyon) 483

]1'(. Ventral aspect of the type specimen. (Lyon collection.)

1 Ih. Posterior side of the same.

12. Side view of a specimen from Alpena, Jlich.

AoKOCRiVL's coNCAvus ( Meek and Worthen) 482

13a. Dorsal aspect of the type specimen. (JIus. Comp. ZoiJl.)
ISIi. Ventral aspect of the same.
13c. Side view of same.

Alloprosallocrinus conicus Lyon and Cass 407

14a. Anterior view of the calyx.
14J. Posterior view of the same.
14c. Dorsal aspect of same.

(All specimens in the collection of Wachsmuth and Springer, unless otherwise stated.)

1

^j,^^^

CiiiN'iir>r;A t.:At;iKUAiA.

I i.^r\: '■■i:

«•*-

f

A M \\V(irfiri«irr. iel

IKi'^lvq" I'nr.'nif i-f P'.'itrii:.

'J,

IK-

m

/

-4

»

1 f
i

1«

I

V>-A. I.

7/'

9.

PLATE XLIII.

PAdR

I)iii:v( iiiM s Mrssis.sii'iMKNsis K. Iulmiri' 455

S|ifi'iiiioii willi arms uinl sU'in. (C!oll. Lisbon A. Cox )

DlllfVi UIM'.s (iol'I.KI (Hall) 4i'lli

I.ai'Ki' spociiiu'ii with anus ami stciii. (Cull. \V. and S]!.)
A yiiiiiii,' spi'ciiiioii witli arms. (Saim' cuUoctinii.)

AoiiiMiiiNis si'ixosii.rs (IFall) 478

S|ii'ciiiu'ii willi arms. (Cull. L. A. C )X.)

ItoitvcuiM s coiiNKiKiuM (Hall) 458

Calyx, slidwiiig tlio anal siilc. (Cull. \V. ami Sp. )

lloHVcuiNis MissouKlKNsiH (Sliiunan') 4(13

rosteritir side of tlio calyx with most of the spines intact. (Same collci'tion.)

AiiAUicocKiNts xoorr.osr.s Wortlion 41)7

Oor.sal aspect of the calyx. (Same collection.^
Ventral aspect of the calyx.

AoAltllOCKIXl S WllITKIEI.DI Hall 400

Dorsal aspi'ct of the type specimen. (Illinois Statu collection.)
Ventral aspect of the same specimen.

AoAHiroriUNis nodosi'.s Meek and Worthen 493

Calyx and portion of the arms. (Coll. \V. and Sp.)

J.

\

!• ,N"^il A 'Al.U'.WAIA

ll.AII y.Mii

.' 1. JiiWwv/ 1/.

H'ii..T>T' riir.tii.f :u Briton

I

I

t

/

H

I'LATE XLIV.

Vauk

DoRvcttiM'K isTKKMKhiiH Moi'k and Worthcn Iiil

Kirf. 1 Spcoiinoii with nrins, siiinoH, iiml Hti'Pi.

l)illlV< UINUH MIHXIHSll'I'lKNHIH ItiL'lUOl' 4M

Z I'oatL'iiiir hIiIu oC tlio calyx.

3. Ventral aspect of a Bpociniou with lonK spines.

UoHVOltl.vufi Uoci.ni (Hall)

4. A npi'cimeii liaving the aims and pnrtioiia of the 8i)ines preserved (from

Indian Creek, Ind.)

5. Anterior view of the calyx. (Specimen from Kentucky.)

I'OHVCHI.VI'8 1 OHXIl^ElllTg (Hall)

1). Dora.al aspect of the oalyx.

7. Ventral aspect ot another specimen.

too

468

478

AOROCBINUS Sl'INOHULl'S (Hall)

Ha. Posterior side ot the calyx.

Hli. Ventral .aspect of the same specimen.

EuETMoiuiNus liKMiiiKACHiATi'H, var. Kxi'ANsus W. and flp. . . 39()

A largo specimen, sliowinjj the calyx, anal tube, and the infolding of ti.-
arms.

(All the specimens in the collection of Wachsmuth and Springer.)

.

i..

■Mli !' \.A

' : \-Mr.T V-

■ ^^<g**^'n

<^-.

\

■<-.s .: ' ■•■. \\..

llAlE XLV

li-hDiyrf- Pnr'ing 't R. tkt.

PLATE XLV.

AOROCRINU.1 BADIATUS W. ftlld Sp

Fig. 1. A specimen with arms ; anterior side.

AonocuiXL's uELicK (Hall)

2. Posterior view of the typo specimen. (After Hall.)

AoHoruiNTS rAuviiiAsis W. ami Sp

3a. .Specimen with arms fiom the anterior side.
34. Posterior view of the calyx.

AoitocKixu.s iMMATUiMS W. and Sp

4'(. Lateral view of specimen with part of the arms, and portions of stem and
cirri [iroserved.

44. Posterior view of another specimen.

AOROCUINUS HKLICE (?)

5. Anterior view; from a gutta-percha cast nmde in the natural mould.

AonocitiNus CANALiccLATus If. and W

P.\riE

•ITU

4S1

47;{

471

481

Cn. Anterior view of the type specimen. (After Meek and Wortlien.)
64. Posterior view of the same. (After Meek and Wortlien.)

AOROCKIXI'H SUBACULKATl'S (Hall) 17(1

7". Anterior view of the calyx.

74. Posterior side of tlie same. (Vfter Hall.)

DoRVCRixi's VMCORNH ((). and Sh.) IGS

Ha. Anterior view of a specimen witli arms.

84. The same view of a smaller specimen with part of the stem.

8c. Ventral aspect of a large calyx.

8(/. Dors.al aspect of .another largo calyx.

8c. Anterior view of a young specimen.

1). Posterior view of the form descrihed by Hall as Acfinocrbuts trieornia.

10. The form described by Hall as Actliiocrlmis pendens ; anal side.

AoROcRiNus PARVUS (Shumard) 477

ll'(. Specimen with arms and stem.

ll'i. Posterior side of calyx of a large specimen.

l"i«. 12.

13i.
13,'.
11.

15a.
15/-.

Paok
P(iKYCni>fus r>fisri!fA (Hall) 407

Speciiu'-'U witli an uiiusiially large spiiiu and portions of the arms.

DoKYCitiNL's Missoi'KiENsia (Sliuuiaril) 403

Anterior view of tlio oalyx with spines intact.
Ventral aspect of the same specimen.
Posterior view of another si)ecimen.
An abnormal specimen ; posterior side.

DuuYCKi.N-L'3 KuiMEBi M. and W 4C4

Anterior view of tlie caly.x.
Posterior view of another specimen,

(.Vll specimens, except C and lb, iu the collection of Wachsmuth and Springer.)

i

PLATE XLVI.

Pai.K

(?) rEHIEniOCRINl'S WllITEI (Ilall) 5o()

Fig. 1. A very largo specimen from the Upiicr liurlingtoii limestuue. (Coll. W,
aiul Sp.)
'J. A smaller spoeimcii from the same bed. (Sanio collection.)

3. Side view of the calyx. (Same horizon, and same collection.)

(?) I'KKiKciiocuixrs TENa-ii)iscu.s (Hall) 531

4. Lateral view of the dorsal cup. (Same collection.)

A(i.vuicof.'Rixrs Sami'soxi S. A. Miller 505

5. The type specimen. (Cull. V. A. Sampson.)

LiiruiriiiNis .niH'iDUAC'iiiATUs McChosuey 440

C>,i. Specimen with only eighteen arms. (Coll. \V. and Sp.>
Gh. Ventral asjiect of the same apecinieu.

Hatociuxis uoTADKxrATL'.s Rowlcy and Ilar^ 374

7. The type specimen, showing the dorsal cnp. (Coll. K. R. Kowley.)

liAToriuNi's Cai,vixi Rowley 373

i<a. Side view of the type specimen. (Coll. R. R. Rowley.)

8'). Another view of the calyx, showing the anal interradins to the left.

I)izv(i<icuixis KL( oxrs, var. aiiscissis (Ixowley and Hare) . . . 4.T1
",), Side view of the calyx. (Coll. W. and Sp.)

DizYcncniNTS MoxTciOMKiiVExsis Worthen 428

]0. Typo of the synonym " BatDcriniis Gurloji" R. and II. (Coll. R. R.
Rowley.)

ArTixocRixis (?) cnovTKArExsis S. A. Miller 570

llrr. Posterior view of the typo specimen. (Coll. F. A. Sampson.)
Hi. Ventral aspect of the same specimen.

1-,N ::'IA A.MKN-VIA

11 X.

c^^i

'^^

^''^

\

V ^■ ■.'■/'■ '' ■'■0!»T

PLATE XLVII.

JlKiasTOCHINl-.s KVA.NSI O. aiiil Sh,

p,\(.l-

;i.

4/..
5(1.

He.

f).

I .
Sr,,

8i.

Lateral view of a largo speciiiicii.

Vi'iitral aspect of tlio sniiiu.

nasals ami radials uf a larije spocimen with corrugated piirfaeo.

Inner lldor of the aiieliylnseil basals.

A meilium-sizwl speciinen with the anal opening low down.

L'pper part of tlio stem.

Its lower part.

A rather small specimen of the form described by Hall as Actlnncrbiiin

bivrtciiniis ; anterior side.
Posterior view of tho same specimen.
Ventral aspect of same.

JIi;(iisroiiiiNi-s .N0I1II.TS W and Sp

Posterior side of a large specimen with arma.

■\'entral aspect of another specimen with arms, showing side- and coveriug-
plates.

Sliowing tho eovering-plates and side-pieces as they enter the ventral disk
(enlarged).

A portion of tho same specimen, showing tho covering- and side-pieces in
proiilo (still more enlarged).

(All the specimens aro in the cuUectiou of Waohsmuth and Springer.)

/ . "

/•.

-■/i.

u.,

He

J

.11 I .1.

■ ■ /...

if

\ V. WcuL'-rn- 1' L

I!".' ::-• TVinung .'■' b .■--,

i.

I

l<l

Fig. U.
U.
ic.

3'i.
•3b.

4n.
■kb.

PLATE XLVIII.

JIeoistocrints sri.Nosi-LL's Lyou

rostorior view of the type sijccimen; from Louisville. (Lyou collectiou.)

Dui'sal asiioct of the same specimen.
Veutral aspect of same.

A specimen froiu Columbus, O. ; the form (loscrihoil by S. A. Miller as
M. pihatiis. (Coll. W. and Sp.)

MK(iISTO(liI.\L-.S LATU8 Hall

Ventral aspect of calyx. (Coll. A. S Tiffany.)

Dorsal view of same. (Tho orientation of both figures incorrect.)

VMiK

544

638

Meoistockims Farxswoktmi White

Dorsal view of the calyx. (Coll. W. and Sp.)
Side view of another specimen. (Same collection.)

r>'>.

Ga.
Gb.
Gr.

JlKuisTof.uixi's co.NX'Avi's \V. and Sp

Dorsal view of the calyx. (Coll. W. and Sp.)

Lateral view of the type specimen. (Davenport Acad. Sci.)

Ventral aspect of the same specimen.

Mf.gistocri.ni-s RUGosi'.s Lyon and Cas.s

Dorsal aspect of the calyx. (Coll. W. and Sp.)
Ventral aspect of tlie type specimen. (Lyon collectiou.)
Anterior view of a smaller specimen, shoving portion of the anal tube.
(Same collection.)

C39

543

543

//.

7.-y

Jy:

/>.'

/

:■; :•.:,".!:

itO

i

{

i

IP jmpiiHiii I iii'jy! <-

>fc

1(1.

3.

■1.'.
■ill.
•If.
4,/.

PLATE XLIX.

5Ii:(ilST(IClUNlS AllNOKMIS Lyoii

Dtirsal aspect of llie calyx. (Cull. W. and Sp.)

I.,atcral view uf tlic same specimen.

Ventral aspect of another specimen. (Same collection.)

r.ioE
540

;Mi:iiistoikims depuessus Hall

SIO

A specimen from New York. (Coll. A. S. Tiffany.)
Side view of a specimen from Louisville. (Coll. W. and Sp.)
l)orsal aspect of a specimen from Xcw York. (State :Mus. Xat. Hist. X. V.)
Ventral aspect of another specimen. (Same collection.)
I'ortion of the arms. (Same collection.)

Dorsal aspect of a small specimen from New York, showing the ornamenta-
tion. (Coll. \V. and Sp.)

JilEcisTocKiMs xoDosus Barrls

0((.

nil.

Literal view ut the type specimen. (Mus. Davenport Acad. Kat. Sci.)
Ventral aspect of another specimen. (Same collection.)

JIegistochixus MfLTtDbxouATis liarris

Lateral aspect of the type specimen. (Same colleetiou.)

541

542

.^ ...

t}l.

7/.^

/
1 1 <■

h

wv

ii. : 1

f •

4^

■!

t h

H'.i-iv- rnr-:-;- " f

in

Kig. 1(J.
U.

•2b.

:Vi.

51).

74.

PLATE L

I'AOE

I'EBIECIKK KISUM NKCIS (Wiiicli. aiul Mai'cj) oL'l

I'ostorior sido of an iiitornal oast. (Coll. W. C Egan.)
Ventral aspect of another cast. (Same collection.)

I'KUiKcmnKiNi-s i.s'KKLi.\ W. ami M 523

An Interior cast in a side view. (.Same collection.)

Ventral asi)ect of an internal cast. (Same collection.)

Lateral view of a specimen iiguriMl liy S. .\. Miller as Snrrorriiius Egani.

(Same collection.)
Ventral aspect of another oast, fii^iired as .S'. Ju/nni. (.Same collection.)

rKKiKcnociii.NCs ou.vATi;s Hall andWliitf 527

Giitta-pcrcha cast from a mould in the rock, showing surface markings;

posterior sido. (After Hall and Whitlield.)
Anterior view of an internal cast. (After Hall and Whitfield.)

I'KUIKCHOCUINCS TK.SN i-^SSKK.VSIS (Hall) 528

I'ostorior view of Uiemer's type specimen, (After lloemer.)

rKiiiEcriocKi.vus URNiFouMis (S. A. llillcr) 52(5

Posterior view of an internal cast. (Coll. W. C. Kgan.)
Ventral aspect of another cast. (Same collection.)

rKKlKClIOOKlNlS Sl-ECIOSUS (Hall) 521

The typo specimen. (After Hall.)
Part of an arm enlarged. (After Hall.)

l'EKiKciiociiixi'3 M.VKCor.vxus (Wincli. and >rarcy) 52.3

Sido view of an internal cast; anal side to the left. (Coll. W. C. Kgan.)
Anterior view of the dorsal cup. (Same collection.)

11

1-

PLATK LI.

rKllll:i 11(11 tlfMH WlllTI'IKLIll (KllU) ...

I\,' 1 A vi'i;v l.ii'j;o lunl miiciuu siit'ciiiH'ii witli anus,

1''. Hiilu vifW of till' (liiisal cup. (After Hull )

'.''•. Till' |il;it('.s iif one iviv, sliDwiiiff oniiiini'iitiitinn. (MWt ll.ill )

.'1. I'listiTiur view (if li lai'gi' t'loii({iiti' .siiccinicii.

■I. W'litr il aspect of iiiiutlier gpeciliieii.

•'i:iiK' .iNis M.MUdiAXiH (Wineli. (uid Maicy)

Silk' view (■' tlie 'lui'sal cup.

I'liiii I ii(i< iirMs Ti;.Nfiiii»ii H (Hail)

(i. Aiitcrii-I.iteral view iif tlie ilnrsal cup.

ri:i:ii:riii" iiixi-i dUXAii-.s (Hall)

7 Side view (if the calyx; fi'ciiii St. I'.luI, I ml.

.Mr.iii.sTiiciiixi s xoiiii.iH \V. aiul Sp.

S. A ymni,:; speciiiuMi, (Type (if .Vi;/''.«^/i'ci'/(/r.< /»(,•,•».«.)

I'j:iiii:i 11(11 iiiMs \ViirTi;i (Hall)

'.). AhteriiT view (if a lar^je .specimen with anus fi-diii tlio I.uwcr lUirliiigtoii
Kivup.

111. .V speeiuieii from tlie Kimlerliouk f,'roiip of Mar.sliall Co., Iowa.
(All speciiiieiLj, oxcciit LV( ami /; in the collectiun of Wachsmnth ami Springer.)

I'AnK

r.2;i

r,in

C27

mo

]

J.

PLATE LII.

I'ig. Vi.
U.

■3.
2c.

S.

■I/'.

0.

ACTINOCRINIS LOUATUS llall 5""

Ventral aspect of a large siieoimen.
Anterior view of the same.

ArTixciciuxL'.s VKKUi'i.'Osus Hall Oi).S

A largo speeinieu with anal tube, and portions of the arms.
Posterior view of the calyx.
Ventral aspect of the caly.x.

AcTINOCKINLS MILTIK.IDIATL'S Sluun 5o."i

Large specimen with arms.
Posterior view of the oaly.\.
Ventral aspect of the same specimen.
Lateral view of another specimen.
Another specimen with arms.

8i.

AcTixocRixrs GiuiTiTiii W. and Sp.
Anterior view of tlio calyx.

Ai.'TixocKixus Ti-nr.i!(iT,osiTs W. and Sp.

Posterior side of the type specimen.

The structure at the upper part of the arms.

The proximal arm plates (enlarged.)

i-fiS

57.'?

(All the specimens in the collection of Wachsnuith and Springer.)

fj^^^

U; W-.-.-em

PLATE LI II.

AcTINOClilNTS Ml'LTfKAMOSlS \V. mill Sp

I'i;^. 1. A tiiagniticL'iit spcciinoii with arms nnd anal tube

Ai TiNiM i;iNis MAiixiinis \V. and S]i

'J. A very laru'o siiocimon witli arms.

(I'lOtli ill the Cdlk'utioii iif Waohsimith aiul Spfingei-.)

r.\(.E

. fiCI

fi67

■*«''**!&rF:!!:^

J

7

PLATE LIV.

AcTINOCIMNl'S ,UllliSl-.s Hall

y"\ii. 1. Posterior side of a lai'h'i' falyx. (_Cull. L. A. L'ux.)

Ai TiNoi iiiNi-s LiiwKi lla'.l

2. Lateral view of tlio oalyx. (Same i-Dlloctioii.)

Ai iivoi iiiNi's t.fiiiATi -I Itall

3. Anterior view of a .s|ii'(.'imi'ii with arms, (^[^ls. Ciiinp. Ziml.)

i''.

r..

(id.

AcTixoc'UiNis ruiJi'iiis (S. A. Milli'rl

Posterior view oi tliu calyx. (Olio iif tlie typo specimoiis; in the

I'". A. Sanipaon.)
Ventral aspect of the same specimen.

r,G;t

r)(ii'

oTd

Coll. of

Cactocuinis ol.vns (Hall)

Posterior view of the calyx. (Coll. W. and Sp.)

Lateral view of a loss nodose .specimen. (Same ei)lleetion.)

Another view of the same specimen.

Hall's type of AHiinn-rimis eryx. (Mns. Comp. Z. .j1.)

AMl'llOKAflllMS VIMIN.VI.IS (HaM.)

Specimen with arms. (C(j11. W. and Sp.)

CiLTj

rm

«k

1

X

J

2

trrt

1

I

i

"1

u.

'21:

4".
4//.

8'..

0'.

10.
11,

12,

PLATE LV.

A( TlNOi lilNL'.s I.OII.VTIS H;lll Tm?

I'listorior view of .i fine spcciniLMi ; slunving iiortions of anal tulic and arms.

(Coll. W. aiul Sp.)
Stem near the calyx.

AfTi.Mii KIMS ri:uxonosis Hall Otil

Antoii.ir viow of tlio calyx. (Same culloction.)
I'osteiior view of another sijccinien. (Same collection.)

AcTIN'lll Itl.VLS JUI.TIUAMOSIS W. auil Sj) 504

Tlie calyx with an (hiiichastev fastened to the anal tube. (Same collection.)

AiTixornTNTs TF.Nri.scui.rTis McChcsnoy . 571

Anterior side of a siiecinicn with arms. (Same collection.)
I'osterior side of the calyx. (Same collection.)

A( riNoi iiiNis seiTii.r.s M. and W 559

Anterior side of a specinK'n with arms. (Same collection.)
Side view of the calyx. (Same collection.)
I'osterior view of tlie same specimen.

AcTixiM in.vrs .viiuosi's (S. A. Miller) 577

One of the type specimens. (Cidl. V. A. Sampson.)
Dorsal aspect of the calyx. (Same collection.)
Side view of the same specimen.
Ventral aspect of same.

C.iCTOCKi-vi s oi'.Ksis (Koycs) ('>!.'>

Side view of the typo specimen, (Coll. .Missouri Surv.)
Ventral aspect of the same. (Coll. \V. and Sp.)

C.\ni" niNTs sEXAiiMATfs (Hall) CI."

Left postero-lateral side of the dorsal cnp. (Coll, \V, and Sp )
I'osterior view of the calyx, (Same collection,)

Cactochincs fo.ss.vtl-s (S. a. Miller) 620

The type specimen, showing the posterior side of tlie calyx, (After Miller.)

Fis. 1.

C>.

10

11

PLATE LVI.

Talk
ACTINOCBIN-US DAIMINE (Hall) •"'" '

I'ostcrior view of a largo speciiiicn. (foil. W. ami Sp.)

Ca(,tu( iiixi s THALIA (Hall) cot

Specimen with arms, described by Hall as AclinorriniLi injWijtwns. (Mas.
C'omp. ZoOl.)

CacTOCIIINL'S TllKTIS (Hall) *51l

Posterior view of the caly.\ and anal tidio. (Coll. \V. and Sp.)
.V large specimen with arms. (Same colloi'lidu.)

Cactociuxus oi'i-sin-i.i-s (Hall") G"'

Specimen with arms. (Mas. Comp. Zoid.)

Calyx, showing the loft posterior ray and the anal interradius. (Coll.
W. and Sp.)

Cactochixus .ML-LTiBisAniiATrs (Hall) 017

Antero-Uteral view of the calyx. (Coll. W. and Sp.)
Posterior view of another specimen. (Same collection.)

Cahocuixus h'cixa (Hall) '''^3

Anterior view of a specimen with arms. (Mns. Com]!. Zool.)
Posterior side of the calyx ; from near T.(misiana, Mo., described by Rowley
and Hare as Acthion-iiiii.i initciiliis. (Cull. K. 1!. Uowley.)

Cactochixi'.s EcTvrrs (Meek and Wortlien i 'ill

Side view of a large specimen. (Coll. \V, and Sp.)

AciixocHiNrs liUAi IMS W. anil Sp oi-

A specimen with arms ({'). (Mns. Cump. Zool.)

r

•:(•

■|' !».'■.: i: A 'AMKHAIA

^

^

A :.' ■.'/"■•■! r:»! ic.

i'.>'.i:w r:::v;:.?

ri-. 1

3.

r>.

10.

11.

11'.
1.1.

(l,.k.

PLATE LVH.

Pacik

('.\i riuiii.Ms .N(iD(p|iu.\( iiiATis W. and Sp (121'

I'l'stui'icr side of a fine siiociiiiL-ii with anus ; llic anus iiicuniiij,' and loiifh-

iiig tlie summit of tlio disk.
Aiiti'i'ior view of aiuitiuT .siieuinieii.

Cm Tim KlXl s (IliN.VTl.s.sI.Mi s W , and i'[ 021

I'ostorior view of tlio type siiooinicn.

Caitoiuixis Auxoliu W. and Sji 024

Sporimon uitli arms and pinnules (the nodus upon the arms are not pru-
servcil.*)

Side view uf the calyx, showing the left antcro-lateral ray.

Cactucuixis uKXTicii-ATis W. and Sp COO

Tlie type specimen, sliowins tlio right posterior ray.
I'dition of an arm from near the upper end (enlarged).

Cai Till iM.xis KXTKX.si .•< \V. and Sp ClU

Lateral view of the calyx.

Specimen with arms, anal tulie, and column.

I'm TiiiKixis i.oxdis (Meek and Worthen) GO!)

Anterior view of an unusually tine and large calyx.

CAfToiiiiN-L-.s cLAnus (Hall) OIU

Lateral view of a large dorsal cup with almost smooth plates.
.Vnterior view of a specimen with ornamented plates.

Cactochixis uETiciLATis, var. nvATf-i (ITall) 000

Anterior view of tlie calyx.

CACTomixus THALIA (Hall) 004

Anterior view of the dorsal cnp.

.Vnotlier specimen, showing the left posterior r.ay and anal interr.adius.

(All the specimens in the collection of Wachsmuth and Springer.)
i« tiiiinT is iiiislc;nliug iu giving tlic appraraiicc of siiiiics to some unM-fiagimuts Iviug u|iou tlic

•1 ;■

1:

I

h ;n •:, I .\ A!.:i.ii/.iA

•1 .•

1

u

i

I'LATE LVIII.

Caciim mscH cLAin ■" (ll.iU) .

I''i^'. 1 Sliowiiii,' tlic :uin stnicliirc, ;iiiil llif iirraiim'iiuMit of tlii' liooka nloiiK tlin
liiiimilt'H.

CArT<M iirs'i M ri:ti( ri,.VTr» (Hull) .

L'((. Aiiti'rior vii'w of tin' I'alyx.
'.'A. I'ljatorior view of llu; ciilyx.

Cai TIMIIINIK I'llolloSCIIiAl.lS (Mull)

t;i'.'

r,(ir>

on

.1. A lar^jo siH'ciiiRMi wiUi ;iniis.

1. Aiiutlior 9|)('oimi'ii witli iiniiH.

.">. rosti'i'ioi- view of tliu ciilyx.

(i. Lixti'ral view of a siu'eiiin'n, .slnnviii},' a portiim of the anal tiilie.

"'(. Portion of an arm, showing the (l(]rsal side of llie iiiniuiles ami tln> hooks;
the food grooves open at pUvees, auil eUisecl at others, f.

'd. The ventral side ut the pinnnles still more enlargiul, showing the arrange-
ment of the covering plates and side pieces, and also at intervals the
l)ottoin of the food grooves.

'c. Dorsal aspect of three ailjoining iiininiles greatly enlarged.

~il. A single pinnule joint, greatly enlarged.

Cai Toi Kixrs Mtl.TinitACIIlATls (Mall)

H, Anterior side of a line specimen with arms.

CAl'TorlilNHS I.IMAIlUAllllAH ■< (Hall)

'.». Lateral view of the caly.s (one of the rays ahnoniial, havin;.; Imt one costal).

10(1. Specimen with arms.

104. Arm joints, much enlarged.

(.Vll the specimens in the collection of Wachsmnth and .Springer)

(117

co.s

T

I'i

PLATE LIX.

PACiE

Ti:i.r.ii'i liiMs ijLiiis (Ihll) (jyii

I'i;,'. 1. S|i(>fiiiieii willi :inus ami stum.

■_'. Aiitfiiur view ol' ;i siiL'ciinoii with anns, anal tuU . ,itul :-tiui.
.'! LatiMal vJL'W of tlio calyx (a vory larye siiecimcii^

TKI.KlOililXts ADllLKSCKXS \V. ailll Sp (iX)

I. Siilo view of tlic type spociiuen.

'ri:i.i'.ici(iiiM s TDxrntADiATrs (Hall) G34

."r Dorsal aspect of a siicciuuMi witli arms.
• '■. Anterior siile of a laru'i' calyx.

Ti:i.EioiiiiNis iMiuiosfs (Hall) 028

7. Portion of the stem.

('Arro( ItlMS ( .Kf.ATI-S (Hall) (il8

S. L.ateral vii'W of the calyx ; typical form.
'.). I'osterior view of a sliglitly lubed .specimen.

Cm Toi liiM s (.i:latis, var. .si'i.voTE.NTACfLus (Hall) Cl'J

]ii. Anterior view of the calyx.

(All specimens in the collection of Wachsmuth and Springer.)

. Oir'lEg

.

Nf

I

Fig. V,.

LV..

■M.

3.

PLATE LX.

STROTOcniNis (ii-vi'Tis (Hall)

Spoeimcii with arms ami stem.
Posterior viow of a very largo spocimcn.
Ventral aspect of a natural cast.

TixKiDCHi-Nrs iMiiiiiisr.s (llall)

A fine specimen with arms and stem.

Anterior view of the caly.x (typical form).

Ventral aspect of another specimen.

A very yonng specimen ; the rays free above the distichals.

Tklkiockixis i.iit.Mis (Hall)

A largo specimen with anal tube anil stem.

C40

fil'S

033

Tklkiockixis ai.tiika (Hall) 032

Anterior view of a large calyx.

AcTiNOcuixis Asi'KKiuMr.s JI. aiiil W TiT.")

I'osterior view of the calyx.

Anterior side of the calyx (specimen with unusually strong riilgos).

(All the specimens in the collection of Wachsmuth aud Springer.)

V

>^

A

■■=>sssEmm

N

A y

/

\

J

ws^m

- ■-"*?-.«»-

v/

1'..
1.'.
17.
1.'.

;;■/.

TLATK LXI.

Pacii'

Stkiianiichini'ii (•(•(•i.rrt'H (IFall) ONI

I'dStcrioi' vii'W iif a hirtjr Hiirciiiu'ii witli iinns. iiii;il tiilu', iiinl sti'Jii.

I/iti'ial view 111' a very Imp' ciilyx.

I'dstoridr view ol aiuitlior calyx.

Niiiui^ !i|ii'i'iiiiuii with ariiiN ami chIiiiliii.

I'nrticiii (if uw of tlio tuliiilar a|<|>i'ii(lagi>8, Bhowiiig the lia.si'.s dl tlic anus (if).

L'riiss-Si'fliun of tin' sainc (f),

SiKii.vNcM uiM H au.\m:(i|,i .< M. and W •"''1

Piii'sal as|M'('t (if a siicciincn witli arms.

Lateral view cif tlic calyx, ami tlic Imvcr cml of tlic anal tiilic.

Sii:(,,\N(iciiiMH i'i:xT\(iMN( » ( llalh Ch'.^

Ventral asjicct (if a siiccimcn. slinHiiiy liurtiiai.s iil tlio arms.

.Aiitiriiir viiw of a largo calyx.

Ventral aspect, of tlio same s|ieciiiicii.

Iiistal face of tlio lirst (ILsticlial (cnlargod)

I'ostpriiir view (if a smaller s|ieciiiicn wiili mfirc rc^;ular1y arranRod covcrinp

jiieccs.
I'osterior view of a siiecinicn from New Mexico.
Ventral aspect of tlio same specimen.

Srri.ANociii.M s ( oxiiNxrs (>liinnar(l) fiSJ

Lateral view of the calyx.
Ventral aspect of a small spcciiiicn.

Sri:i;A\o('i!iNrs cm.oiiosi s W, and Sp CS,")

Lateral view of the type s|ieeimen.

(All specimens iii the uollecliun of Wachsmutli and Springer.)

I

^-2*;*<»-*»> ■

■ f ■ yi

I'l-'. 1.
I.

('./..

s/..

III.

PLATE I A II.

Am1I|iiK>i 1!IM S >llNiir.l!M III All s (Mall)

Pursal asprct nf a siirciim'ii willi a |iuilii]ii nl llii' arms.

Siilo view of a siH-i'iinrii with arms.

I.atonl vii'w of tlu' cal_\.\.

Oiirsal asiH'ct of tlio oalyx, slmwinj,' tlic (iniaiiniitatidii.

.\MlllnUAi llIM s 11IMI!I.I\S ( llalh

Piirsal asport (.f :t sniiicwliat ili>lorl<'il sipcimiium willi arms.

l)(>i>al :ts|Mct iif a liiii' sinTiincii «illi spi-faililig anus.

A liTkril oral sjiiin' uf lliis s|icciiiu'ii.

I'.'Sli'riiir vii'w .■(' a tiiu' spfciiiiin, sliduiiii; lln' arms and spiiios RiirrouiuliMii

till' amis. ( Tlu' spi'iiiiifii was ili'srrihcil liy .Mri'k ami Wurllion as .(. tlli-i r-

'I • 11.1, var. miilf!iiiiii"i'iix.)
ViMtral aspect of tin- .saiiir spcciinrn, slmwiii;,' tlio oral ami anal spiiii's.
SiiU' vii'w of a very small spi'i'liiifii, sliowinj,' llic dial spines.
Porsal aspeet uC llie same specimen.

V'liitral aspect of tlic same, sliowiiii; tlie oral and anal spines.
I'o-lerior view of tlic calvx.
I.,ileiMl view of tile calvx, sliowiiii; lower part of anal tnlic.

(I'i^'s. .", 7', and 7'' were made from specimens in the cidleetioii of llie Mils.
(.'om[i. /.oi'l.; tlic (•tilers are in the colleetion of Waclismiilli and S[iriiiger.)

V.u.t

rv.ti

r..ss

■| :, ., ' A ■.■\:.'i !■ i/

f , .

^ .. . ,. .f,,'

anuwi..

est;

I'LATK lAIII.

Talk
1'|IVS|:Tim lilNl S HUNATIS (Hall) •'"'I''

"i;,'. I. AiitciM-latrnil view uf a s|K'filiu'li willi aims. iColl \V. ainl S|i,)
U'. I'lPstc'iiur vii'W (if tlio I'alyx. (Saiiic chIKtUiHi )
;;. \'iiitial a>|'i'rl. iliowiii),' annular iinprcssion iiiaiU' l>y :. ('"jui!'!. wliich coveri'd

till' anal upcniny. . (Siiuu- colU'cticin.)
1. Antoi'ioi- view uf a largi', slightly eruslioJ siicciniiMi. (Sanio cdlU'Otidn.)

rnvsr.TMc liiNi - ('.>ri;i (Milh'iO ^'■^^

.1. Siilo vifW (if l,^■^■c' siicciuicn. ^Saiiic cdllecliun.)

rnv>i Till iMMs vi-.M i;i( iisi -i (Hall ) >i'Xi

t\ 'I'viic (if lln' varii'ty inl. riinil'iu.-i Hall. O'"^- <-'i'"il'- Z""l-)

I'livsi ;iM s .\si'i:i; .MufU and Wurllicii f''."'

7 '. I'ciitcridr vi.'W df tlio ty|n' spcinincn. (Miis. C'umii. Zunl.)
"A. W'Utnil a.-iK-i'f df lliu sanii.'.

I'nvsrKM i;ists i.diiMi s W. and Sp '>'.•'.•

8.(. Side vi.w df llid ralyx. iCdll. W. and Sp.)
Wi. Vuntral a-*] t df tlu.' calyx. (Same t'olli'ctiun.)

Ti;i.r.idi iMNis .u.riii-..\ (Hall) C3l'

',». I.ati.'1-.d view iif tlio type sprfinicn. (.Mu-^. Cdnip. Zddl.)

*Sf

f

■■^llAS*

.rr^'i

'^■^^^

'i

PLATE hWV.

I'ltVSF.TOrlilXlS VKSTIill'iisl s (Hull)

ri^'. 1. Spoeiiiioii with anus, sti'in, unci root.

'J. I.atiTul vii'W of tliu calyx.

;!. AiitiTiof viuw of till' i'al_vx.

4. rostorior viow of a small rloiiijatc siiooimon,

r>. I>or.sal a.s] t of a ilcpn'ssecl siieciiiifii of Ilall'ti varii'ty " Actiiincriinis" nti-

CI(l'ltl(X.

fi. .Vnti'i-ior view of tlio ralyx.

7. Aiil.'iior viiMV of u sin'ciini'ii of tin; tyjii' of MrClii'Siicy'.s ■' Ai-tiiiorriinta"

niilirriitriinniin.
S f. Spcciinoii from the I.nwiT linrliiij^ton limestone'.
Sh. Vontnl a.^spoi't of tin' sanu' spruinK'n.

P.M.K

I'liv-KToi uiNi s iiM.ATATis Jf. and W.

.V.I,-,

;». The typo spi'i'imcn. (After Meek and Worthen.)
10. Horsal aspect of another s[M'eimen.

(All specimens, except l'"ig. '.>, in the collection of W.iehsinnth and Springer.)

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IMAGE EVALUATION
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Photograiiiic

Sciences

Corporation

23 WEST MAIN STREET

WEBSTER, N.Y. 14580

(716)872-4503

4

v..

PLATE LXV.

Page
St otockinus beqalis (Hall) 638

Fig. 1«. Lateral view of the calyx.

lb.
Ic.

1<;.

Half of a ray to the fiftli bifurcation, drawn from a large specimen.

The extended rim of a large specimen, having portions of the dorsal cup
broken away, exposing the subtegminal galleries at the inner floor of the
tegmeu, and the grooves passing out from the centre and diverging to tlie
arms.

Specimen showing the outer face of the tegmen.

Stbotocbinus glyptus (Hall)

2a. Dorsal aspect of a medium sized specimen.
2b. Tegmen of another specimen.

(All specimens in the collection of Wachsmuth and Springer.)

640

■.ri L;

lluir :\ ■{■■■/ 1.' k-.

ri-l!.;vTe iTir.*-:.)! i 1

■nHMM

1

PLATE LXVI.

I LATYCRINUS lIEMIgPIIEHICUS M. ftiul W.

Paoe
703

Fij;. Irt. Specimen showing arms and stem.

\li. Dorsal aspect of another specimen with arms spreading, and a Plafyceras

hifiinililiulum covering anal opening.
!<•. Lateral view of the calyx; also a I'l'iti/certm infundibuluni attached.
1(/. Ventral aspect of another specimen.

rLATycniNUS sunsi'iNui.osfs Hall C84

2i'. Lateral view of tho dorsal ciipj a very large specimen.
'Jb. Base of the same specimen.

ri.ATvcHixus VEiiiiucosrs Wliito 703

3'(. Lateral view of tho dorsal cup.
3b. Dorsal aspect of the same.

rLATYCUTXrS KXCAVATUS Ilall

A specimen witli arms. (Tho figure does not show sufficiently the abrupt
depressions on the radials just below their facets.)

Pi.ATVCKixus Nono-STRiATUs W. and Sp

718

COS

r>'i. Dorsal aspect.

5''. Side view of a somewhat depressed specimen.

Platvckixus Yandki.li O. and Sh 706

(xi. Dorsal aspect of a specimen with arras.

(l/i. Vostcrior view of calyx.

(jc. Ventral aspect of the same specimen.

rtATvcKiNTs si'ixii'ER W. and Sp 708

7. The type specimen with arms.

Platycuini's ouxiohanulus McChcsney 701

8. A specimen with arms.

Platycrikus sriisrixosrs Hall

9'(. Dorsal aspect of a perfect specimen with arms. (Mus. Comp. Zocil.)
9i. Ventral aspect of the calyx.

Platvcrini-3 discoidevs 0. and Sh , ,

10((. Dorsal aspect of a specimen with arms, tho outer parts of the latter slightly

restored in two rays.
lOJ. Ventral aspect of the calyx.
lO*-. Posterior side of the same specimen.

(All specimens, except Fig. On, in the collection of Wachsmuth and Springer.)

717

713

Ji-, ;no;I'F.a :Ai.:r!-/viA

' i.A ri.

(^ (I

y^--

Si

PLATE LXVII.

I'ACK

ri.ATVirirNis S.vi-i-(ii;iii Hall (iW

Fi;,'. 1. A fine s|u'('iiiii'ii with nniis mid ('(iluinii, Iruni liiili;iii C'lciU, Iml. (Coll.
W. iinil Sp.)
2. Siilo view of tho calyx. (Sumo cullcctioii.)
n. Doi'siil ciiii of a siicciiiuMi fnjiii lUiiliiijiton. (Sanio culloction.)

I'l.ATVciiiNaM (ii.Yi'TiH ir. ami W fiO.T

■I. Siicciiiicii with nrina and (•(ihuiin. ((.'nil, W. anil Sp.)

fi. Dorsal piip of a large, flongato siu'ciuien. (iS'inie collection.)

I'l.AT'ciiiNis iNcoMpris White tiOl

(i. A young spfcinii'n with arms, showing tho numerous bifurcations of tlio rays,
and a faint rugose ornamentation.

ri.ATYcniMs Hi'is'iKKii, var. ELONfiATus W. and Sp 709

7. Lateral view of tho calyx, showing portions of the arms. (Same collection.)

1'latychixi's cavl-h Hall 71"i

i>'i and /'. Dorsal cup of two specimens. (Same collection.)

I'l.ATVi ijiNts AVoiirMKXi Hall 702

9. The type specimen. (Illinois .State collection.)

ri.ATYciiixrs oEOMi'.Tiiicrs W. and Sp C97

10. The typo specimen. (Mus. Comp. Zoiil.)

I'l-ATYClilXl'S TIU'.VCATfl.US Hall G7.'>

11/1. Side view of tho calyx, showing the bases of the arms (enlarged).
1 [li. Side view of another specimen.

1 . ,M 1

,^i'tv..

\.V '.■/-■i'.i-c:i-i 1^;

ii'-".vU7- lYx'J!^

:|t

f. '

'■t m

PLATE LXVIII.

A(IB
rLATYCHINU': VEKKUCOSUS WllitO 705

ri;^ id. Tlie typo specimen, (^[lls. Coinii. Zool.)

111. Oblique view of the dorsal cup. (Coll. W. and Sp.)
]'• Another specimen ; dorsal aspect of the calyx. (Same collection.)
1(/, Later.al aspect of a variety from New Mexico, showing the aual opening.
(Same collectiou.)

I'latvchikus pocillifoumis Hall TdC

2(1. Lateral aspect of the dorsal cup (the ornamentation from another specimen).

(Coll. W. and Sp.)
2b. Base of a specimen with larger nodes. (Coll. W. and Sp.)

rr.ATVcuiNL's YAsn.;.r,i O. and Sh.

700

3n. Dorsal aspect of the calyx; a very mature specimen. (Same collection.)
3i. Ventral aspect of the same specimen.
3c. Posterior view of same.

Platvcuixus Yandelli, v.ir. perasper

4". Lateral view of a specimen with arms. (Afus. Conip. Zool.)
■Ih. Dorsal aspect of the same specimen (the stem removed).

rLATVCIilN'ia SOIT.PTI'S ILall

5. Specimen from Xew Jlexico, later.al view of the calyx. (Coll. W. and Sp.)

I'latvcuixi's pauvixodus Hall

(id. Side view of the type, the specimen somewhat flattened. (JIus. Comp.

Zoiil.)
(j/>. Anterior view of another specimen less distorted. (Coll. W. and Sp.)

Pr.ATvcKixus PECuLiAins W. and Sp

7d. Posterior view of the calyx ; the nodes partly eroded by weathering. (Coll.

W. and Sp.)
71). Ventral aspect of the same specimen.

Platvcuints GEOMETurcvs W. and Sp

8. Another type specimen. (Coll. W. and Sp.)

70«

r.91

cm

700

097

Plattcrinus asfer M. and W.

Fig. 9n. The type specimen. (Miis. Couip. Zool.)

9J, Uasal view of another specimen. (Mus. Comp. Zool.)

PlATYCRINUS ORNIGRANITLUS McCh.

Paob

090

701

lOff.

10/<.

10,'.
11<(.
lU.
VJ,,.
UY-.

13/.
134.
13c-.

14/(.
Hi.

A fine specimen with arms, representing the typical form. (Mus. Comp.
Zool.)

Dorsal aspect of a very short calyx ; showing the ornamentation. (Coll.

W. and Sp.)
A costal and two pairs of distichals.

A specimen with coarser ornamentation. (Same collection.)
A specimen with a somewhat different ornamentation. (Same collection.)
A young specimen. (Coll. W. and Sp.)
A still smaller specimen ('^). (Same collection.)

Platvcrixus EMiNULrs Hall 713

Anterior view of calyx. (Mus. Comp. Zoiil.)
Posterior view of another specimen. (.Same collection.)
Ventral aspect of the calyx. (Coll. W. and Sp.)

.L

Platvcrini's .scohina M. and W. . .

The type specimen. (Afus. Comp. Zoiil.)
Dorsal aspect of the calyx. (Coll. W. and Sp.)

693

Platyckinus Gorbyi S. a. Miller 710

Dorsal aspect of the calyx. (Mus. Comp. Zoiil.)

.L

PLATE LXIX.

I'l-MVI UIXIS SVMMKTltlCL'S W. aiid Sp

Kii,'. 1<(. Sppoiiin'ii with ai'ins and coluimi.

]/'. Vi'iitnil asjiuct of tliu calyx ; a large sin'ciiiu'ii.

1.'. Wiitral asjiout of a young speoiniun ; tlio orals almost sj-ninietrical.

I'LArvtuiNus I'l.Axi's O. and Sh

1' '. A large speciincn with arms.

'J/'. ],iiti'ral view of the dorsal cup.

"'•. A portion of the arms enlarged.

1''/. A young specimen, apparently of this species.

I'l-ATYciii-srs iuuLiX(.T0XKNsis O. and .Sh

;i'(. A medium sized siiecimeu with arms. (After Jtcck and Worthcn.)
o/i. Lateral view of a large calyx.

."'•. Ventral aspect of another large specimen, showing the anal tube.
.'If/. Posterior view of a smaller specimen.
>"/ . \'entral aspect of another small specinu'n.

";/: ])Lirsal cup of a young specimen. (Inadvertently drawn with left antero-
lateral interradius at the top.)
.";/. A very young specimen with zigzag arms, composed of single joints.
o/(. I'ortion of an arm showing the lateral processes (enlarged).
Si. I'ortion of an arm in a dorsal aspect (enlarged).

I'l.ATvrnixi's A(iAssizi \V. and Sp

4. A very large specimen with arms.

]'i,ATV( liixis i'ir,i:iroi:5iis Hall

.'). A specimen with arms (slightly restored).

I'l.ATVc tnxL-s nox(i;xsis Wliito

0. A siiecimen having six arms to the ray.

PLATvriiixrs sak.t: TIall

7. The type S]ieciinen. (After ILill.) Somewhat flattened.

l'.\r:K

Uo5

CG8

633

OO'J

0^()

CS.-j

(hT

(All s|)ecimens in the collection of •\Viielisinuth and Springer, except that of Sn,
which is in tlie ^Fuseum of Comparative Zoology, and Fig. 7, which is in the
Illinois St.at'J Museum.)

"<h'iNo:;; A 'a:.

A:,:r'-^vi>

lu-vi !.'

'

■t I

PLATE LXX.

Pai.e

1'i.ATvrnivi's sAii.K Hall - (577

l"ig. 1. Specimen with faintly ornaniuntoil plates.

rLATYCIlIXl'S N0D0-8TlilATIS W. ami Sp (lOS

.'!. Specimen with six to the ray, the must frequent number.

•I". Lateral view of the calyx; an older specimen.

■I/'. Anal side of the same specimen.

•Ic. Ventral aspect of same.

I'latycuixi's niiKvixoDis Hall (iSS

L*. Siiecimen from the upper part of the liurlingtun limestone ; with column,

root, ami four arms to the raj'.
o. Specimen from same horizon with six arms to the ray.
C'( ami b. Two specimens from tlie Keokuk groiiji of Indian Creek, Iml.

I'l.ATVc uixis TcxiiimAciMATrs Jleck and Worth G87

7. A specimen with arms.

8. -Another specimen, slightly differing in ornamentation.

rr,..TVii!ixis srusMNitosis Hall c,^\

9. A highly ornamented calyx.

I'latvckixus Samtsoxi S. a. Miller 07,3

10. Later.al view of the calyx.

Tf.ATVCRixrs ruArTKXi Worthen (;7i

11. .\ specimen with arms.

12. The b.isal disk.

Pr.ATY( liixcs iMr.riFoiiMis Hall (;,v;

l.'V/. Lateral view of the enlyx.
13/*. Posterior side of the enlyx.

Pr.ATYcnixis Davis! W. and S; (;si

It. Lati>ral view of the type specimen.

(All the specimens in the collection of Wiehsnnitli and Springer.)

"•V -

-f.

?

,if.

.'('IIMIl'tA 'MM'K.M/

i i-'.ri L.

.w

■::: "iK'.-rt ' ;. Hi;iif\JY -If".

Hf'.iiW- Fl-:-.-.!.? .'. y ■•.;!,

i

PLATE LXXI.

I'A.I

Pf.ATV'^BIJlUii INroMl'TUH White (1(11

I'ij,'. 1 V very liii'Ko spociiiu'li, showing tho numerous rainitioatiiins ut llu^ arms.
(O.U. \V. anil Sp.)
'_'. A Hiiiiill H|i«('iiiit'ii, bliowiiiK tho saiiip. (Siuiio collection.)
;l. 'riio type siH't'iimMl. (Mu9. Coinii. Zoiil.)

I'l.ATYciiiNi's .WjiAi.ift Hall on

■|r', A very liirun Hpoclinon with amis. (Same collection.)
•16. I'ortion of an arm (enlarged),

r>. The calyx, shciwing the nulial facets and the small lirst costal. ((Jnll. W.
aiidSp.)

I'l.ATvritiNis i.dDCNsin Hall nncl Wliitf (!('(!

(i. Tlie type specimen. (Alter Hall imd Whitfield,)

rr.ATVi'HiNis ciiiAi'iiiiis Hall and Wliitf , 071'

7. The typo specimen. (After Hall and Whitfield.)

I'r.ATviitiM's coNTiiiTi's Hall and Whitf 1(17

S. Tho typo specimen. (After Hall and Whitfield,)

I'l.ATVcitiNi's NioTKNsis Mcck and Woithon (IM.'

9, Specimen with arms (from Indinua).

I'r.ATVcniM'M Hkitthi S. A. Jfiller (l.Mi

10, The typ(^ specimen. (Cull. F. A. Sampson, Sedaliii).

ri.ATvi'iiiNis cnnmMFdKMis IJowlcy and Haro (lt")7

11". Dorsal cup in a side view.

ll/(. Dorsal as[ieet of the same specimen. (Coll. 1!. R. Kowley.)

Vi.ATvritiNi's .I'.gi'iTKiiNUS S. A. Miller OoH

V2. Tho type specimen. (C<dl. F. A. Sampson.)

ri.ATVt^iiiNiTS risr.M Rowley and Hare (i(l(t

\"ii. Tho typo specimen ; posterior view. (Coll. U. R. Rowley.)
1.")/;, Dorsal aspect of san.o.

Fig. 14",
14/-.
Ur.

:o.

17.

18«,
ISi.

I'agk
I'l.ATYCHINUM gllXQlK.VODl.s AVIlitO Otil

The type specimen ; lateral view o£ calyx. (Miis. Comp. Zocil.)
Ventral aspect of bame.
Dorsal aspect of same.

I'latychinus insolexs Eowley and Hare 059

The type specimen. (Coll. K. R. Rowley.)

Platychixus I'KCULiAiiis W and Sp 700

The type, a rather largo example. (Coll. W. and Sp.)

Platyorinus ALLoniYLus S. A. Miller 085

The type specimen. (Coll. F. A. Sampson.)

PlATYCRISUS TRUNCATITLU9 Hall 675

Dorsal aspect of the calyx. (Coll. W. and Sp.)
Side view of the dorsal cup.

PLATE LXXII.

PlATYCBINUS REOALI9 Hall

I'lg. 1. Specimen with arms, stem, ami root. Tlio calyx of tliis speeiiiieu is much
distorted by pressure, and the surface ornamentation obscure, so that in
some of the characters it gives an incorrect impression, and does not
represent a typical example of the species. (Coll. W. and Sp.)

2. The type specimen. (Mus. Comp. Zool.)

EUCLADOCRISUS TUHER0SUS (Hall)

3. Specimen, showing the small branching arms given off from the tubulur

appendages. (Coll. W. and Sp.)
4ff. Posterior side of the calyx. (Same collection.)
46. Dorsal aspect of the same specimen.
4c. Ventral aspect of same.

Pack
710

728

EUCLADOCRIN'US MONTAN'ENSIS Meek ....

The type specimen. (National Museum at Washington.)
Tlatycrini-s Halm Shumard

723

CC3

BuaB

7ii.
lb.

8«.
8/;.
9.

10.

Specimen with arms and stem. (Coll. W. and Sp.)
Portion of an arm, enlarged.
Posterior side of the calyx. (Same collection.)
Ventral aspect of the same specimen.

PLATVfRINL-S BOONVILLEN'SIS S. A. Jlillcr .

681

The type specimen, showing the dorsal cup. (After Mdler.)
Dorsal aspect of the base. (Coll. W. and Sp.)
Another specimen. (Coll. F. A. Sampson.)

Platycrinus 0RXir,RAVur,i-.s ^IcCh

Basal disk, showing the ornamentation.

Marsupiocrinus rBJ!MATURUs (Hall and Whitf.) . .

701

734

T

llrt. Side view of the type specimen.

Hi. Dorsal aspect of the same. (After Hall and Whitfield.)

\

I'i.i,'. 1.

0.
7(1

9.
10

11
12,

PLATE LXXIII.

PAnn

Ei'ci.ADOCHixus Mri,i.i:iiuA(,iiiATi'8 W. and Sp 720

A largo speoiiiicn ; the tubular apiiendagos hauying over the calyx.

EucLADoriiixus MiLLEiiRAcuiATLs, var. iMMATi'isrs W. anil Sj). . . 722

Ddrsal view of a small specimen ; the tubular appendages directed

horizontally.
Ventral aspect of a larger specimen, showing the bases of the arms.

Erci.VDoritixus rLEiKoviMixErs (Wliite) 724

A largo specimen, showing the dorsal side of the caly.\.

Ei'CLADOcuixus PR.K.vuN'Tius W. and Sp 723

One of the typo specimens, showing calyx and portions of the arms.

Platyckinis iirxTsviLL.E (Troost) W. and Sp 678

A large specimen with inflated arms ; the plates of the calyx not ornamented.
Another mature specimen with ornamented calyx plates, the arms gradually

tapering.
A portion of one ray enlarged, showing the spinous processes at the sides of

the arm plates, the waving suture lines between the lower brachials, and

the arrangement of the pinnules (}).
An immature specimen; the arms uniserial to nearly one half of their

length (i')-
A more mature specimen (p).
A very young specimen, the arras composed of comparatively elongate plates.

and uniserial almost to their tips {'■().
The base of a highly ornamented specimen.
The base of a smooth specimen.

(All the specimens in the collection of Wachsnuith and Springer.)

i

PLATE LXXIV.

TAliF.

Em.VDOCRINl'S I'l.El'KOVIMINKlH (Wllilr) 7-4

Fig. 1. .V iiinj^niliccnt specimen, showing the calyx, tlio tubular appendages, arms,
and column.

Kiir.ADoi iti.vi's MiLLEiiBAciiiATi's AV. and Sp

A modrnitoly laij,'i' spocinicn, showing the duisal side of tlio calyx, tubular

apiiundagcs, and arms.
Side view of the calyx.
Ventral aspect of a fine specimen, showin;^ the rigid covering pio(a'S of the

tubular appendages, niul the ventral furrows along tlie arms.
Lateral view of one of tlie tubular appendages, showing the arm opening.s,

and the respiratory pores at the base of the arms.
Cross section of an appendage, showing the central cavity.
The appendage with the covering piece- removed.
Pistal face of a stem joint from near the calyx, showing the transverse ridge,

and the minute axial canal.
I'ortion of an arm enlarged, showing the pinnules.

720

(.\11 the specimens in the collection of Wachsmuth and Springer.)

■A-.: VT- -T--.:.l

i\ ■. ;a a:

I

J" wn^pmut;.ii'ii ." H u'MiJ I m« I ■ wi'i"!' '!(iv *^y"»^-* I ' J ii»^' I w^^immf

?^^t!»>^'^viM^ft^if^p''*?i^ga*-';^rs"-^!^*^ s^5r»

"r?g^«t^^^"

PLATE LXXV.

CaMPTOCUINUS MYKLOI>ACTVI,rS W. aiul Sp

Fig. 1. A specimen with stem and cirri. (Coll. W. and Sp.)

2i and A. Portions of the coiled stem in different specimens, showing the cirri.

Diciiocnisus Blaiui S. A. Jliller

.'{. The type specimen. (After Miller.)

Pai^k

Ti.s

Du.no(UiNrs huntsvii,i,.u W. and Sr.

4. The type specimen. K'oll. W. and Sp.)

PlCIIOCRINlS (.INcnS S. A. Jfll.LKU .

5. Specimen with arms. (Same collection.)

Diciiociiixus foxr.s Jleek and Worthcn
(i. The type specimen. (Illinois State coUoetion.)

rLATVCUINlS I ANAI.IClI.ATrS Hall. .

7". Specimen with arms. (Coll. W. and Sp.)

"'*. JVn-sal aspect of ilie calyx. (Same collection.)

I'l.ATVCHIXUS .SCl'LPTl'S Hall ....

rro

Gfi'.)

cm

S. A large specimen with arms. (Same collection.)

9. A smaller specimen, (^[ns. Comp. Zoiil.)

Platvcrixis AMKiiKAsus O. .and Sh dSG

10. A mature specimen with aims; the latter biserial from above the last bifur-

cation. (Coll. W. .and Sp.)

11. A young specimen ; the arms uniserial and zigzag, the joints elongate, and

the pinnules far apart. (Same collection.)
llj. Dorsal .aspect of the calyx. (S.ame collection.)
lull. Side view of the calyx of a large specimen. (Same collection.)
\!M). Anal side of the same specimen.
\"'\ Vontr.al aspect of the same.

14. Natural oast, probably of Culicocriku.s

From the Niagara group of Iowa. (Same collection.)

,1'

j,i I nil-* wBmmmmmmmm

i
^4-

Paok
CoccocKiNus BACCA F. Roeiiier 739

rig. lou. Dorsal iispeot of the calyx (drawn with the aual intcrradiua at the lower
loft side).
15i. Kight anterior side of the same specimen,
lye. Posterior side of same. (Same collection.)

Marsupiocbinus TENNESSEENSI.S (F. Rocmer) 731

](!«. Dorsal view of the calyx. (Coll. W. and Sp.)
IGi. Ventral aspect of the same specimen.

Mausupioceinus stkiatus W. and Sp 732

17. Dorsal view of a rather small specimen. (Same collection.)

18. Ventral aspect of another specimen.

Mausupiocuinus tentaculatl's (Hall) 733

10(1. The type specimen. (After Hall.)

19i. Enlargement of one of its rays. (After Hall.)

COUDTLOCIUKUS PLUMOSUS (Hall) 737

20. The type specimen. (After Hall.)

U:

ii -
1 »'

I

\

1 '

^hiu ■:: ■■^\

! :./. IT. L. ■

I

I V v.'-H-.mr-t, lit:

L^=»

— »w

"nawrnpW'

rig. la.
U.
Ic.

2a.
lb.

3a.
3i.

\a.
4i.
4c.

6A.
Cc.

10,

PLATE LXXVI.

Faor
AnTiiKACANTiiA iTiiACENSis Williams '''49

Lateral view of a specimen with arms. (Jluseum Cornell University.)

Hasal disk.

Tiio movable spines upon the tegmen.

Abthbacantiia punctobbaciiiata WilliLms 750

Specimen showing spine bases. (Coll. W. autl Sii.)

Another specimen with some spines attached. (Coll. Prof. S. Calvin.)

Abtiihacantiia depkessa W. and Sp ""1

Dorsal aspect of the typo specimen. (Coll. W. and Sp.)
Ventral aspect of the same specimen.

DiciiocBixus LINEATU8 Meek and Worthcn 7G1

The type specimen ; posterior view of the calyx. (Mus. Comp, Zool.)
Anterior view of the same specimen.
Dorsal aspect of same.

DicHOCRiNus pisuM Meek and Worthen 7C3

Specimen with arms. (Mus. Comp. Zocil.)

DicnocRiv^s cRASsiTESTi-s White "GO

Tlie type specimen ; the anterior side exposed. (Same collection.)
Another specimen with part of the column attached. (Coll. W. and Sp.)
Posterior view of the calyx and anal tube. (Same collection.)

DiciiocRixus OVATUS Owcn and Shumard 7C0

A fine specimen with arms. (Mus. Comp. Zool.)

DiciiocBiNus r.iRATus Hall 7o9

Specimen with arms and part of column. (Same collection.)

DicitocRiNus coxANUs Wortlicn 763

The type specimen. (Coll. L. A. Cox.)

DicnocBiNus IiaMiltonensis Worthen " -

The type specimen. (Same collection.)

■mm-rwm'

Pack
DicnocBiNUs ANOU8TU8 White 7*'8

Fig. 11. Postetior view of a specimen with arms. (Coll. \V. and Sp.)

DlCIIOCRINUS 8UPEKSTE8 W. au(l Sp 'CO

12. Side view of the type specimen. (Same collection.)

Camptocbinus cirbifeb \V. and Sp 780

13(7. The type specimen, showing the curved cirrus-bearing stem; from the

Kaskasliia group of Kentucky. (Coll. W. and Sp.)
13A. Another specimen from the Kaskaskia group. (Same collection.)
13f. A specimen from the St. Louis group of liuutsville, Ala. (Same collection.)

•sp

•lla«*^-*f!»;:

A

I

PLATE LXXVII.

Paoi

DiciiocRiNus roLYDAcTYLua Cass. and Lyon 756

1(1. A largo spoeiinon with arms.

lb. Postcriur view of calyx, showing the elevated dome and disk ambulacra.

DiCIIOCBINUS LACIIBYMOSUS Hall 754

2<i. Specimen with arms and stem.
:if>. Postf rior view of calyx.
I'c. Ventral aspect of same.

DiciincuiNus LiHATrs Hall 7C9

3((. Specimen showing the arms and stem,
34. Posterior view of the dorsal cup.

DicnocKiNis fivcTus Miller and Gurley 7C4

4rt. Posterior view of specimen with arms.
46. Ventral aspect of the calyx.
4c Distal face of first distichal (J).

Diciiociiixus PLicATrs Hall 758

5(1. A small specimen with arms and stem.

Ci. Another specimen, giving a side view of the dorsal cup.

DiCIIOCBINUS oiijTATus W. and Sp 7G2

C. Specimen with arms and stem, from near Srt. Pleasant, Iowa.

DiriiocRiN'us LyKVis Hall 705

7rt. Specimen with arms. (Coll. Mr. Fultz of Burlington.)

Th. Another specimen. (Same collection.)

7('. Portion of an arm with pinnules (enlarged).

DiCIIOCBINUS ovATus O. and Sh 7C0

8(1. A specimen with arms.

86. Posterior view of the dorsal cup.

DiCIIOCBINUS OBLONGUS W. and Sp 7-;9

9. Posterior view of the type specimen.

I'AdK

Diiiiocm.Ni's risuM M. and W "'••'

Fig. 10. Posterior side of the dorsal cup. (After Muok and Wortben.)

DiouocuiNUS 8TKIAT18 O. and Sh 7C7

11(7. rosterior side of tlio dorsal cup.
114. Side view of another s;/ouiuien.

DiciiocniNi-n iNouxATus W. and Sp 770

I'^ii. IVjstorior view of a specimen with anus.
iL'i. Another specimen.

DiciiocKiNUS DBLicATUS W. and Sp 706

13. The typo specimeu.

(All the specimens, except 7", /' and 10, are in the collection of Wachsniuth

and Springer.)

-

h '■',; ;: t.A "M:.y '*/■.■> a

ly.i'l. I. Vlll

y*

1^

^

til

il-it:vvpc Pnr.iiiii; ''o.Ri.itgr.

ruTK Lxxvm.

Ill

2k

TaI.AHOc HIM 1* HKXI.OIIATIIM (Sl.illlllird)

I'osti'rior view of it Hpcciiiioii fnuii l"iii,'|icpiit, Va, (Vj, (VM, \\. luid Sii.)
Vi'titnil aspect of tlio Raiiio Hporiiiii'ii (',").
Duisiil view ot tlio calyx. (Coll. W. and Sp.)

Paoi

■Mj.

4-1.

■1/'.

Cut.

(I/..

"'I,

til.

»li.

9ti.
Oft.

10.

TAI.AHOCUINCH OVATIM Wortlu'll

I'tmtciinr vii'W of the typn Hpi'ciimii (','). (Illinois St, Coll,)
Ventral asiicct of tlio .saino Hin'cinicn ('i').

Tai.ahoc iiiNi M DijcoiixiM W. and Sp

Toatcrioi \ ii'w of the typo siircinicn (','j. (Coll. W . and Mp.)

Ventral aNpcet of Iho aamo (','),

Specimen with arms (','). (S.imo collection.)

7«7

78H

TAi.AKorniNMi sYMMKTuiri'H (C'aN.s. n)i(l Lyon)

I'oatprior view of tlio calyx (','). (Coll, W. and Sp.)
Ventral aspect of the same specimen (',").
I'osterior view of typi' t^','). (Coll. S. H. T-yon.)

Tai.ahik itrM-.i coKNiaKiu'D (Slnimard)

Toateiior view of a .specimen from Vulaski Co., Ky. (Coll. W. and Sp.)

Ventral a.speet of tlie same specimen (V).

.\nterior view of ilio typo specimen, from Alabama (',")■ (Mas, Wnsliint,'ton
University, St. Louis.)

Ventral aspect of tlio same ('(').

TRfi

7S,1

Tai.ahochiniis stmpi.kx (Sliumard)

Anterior view of tho dorsal c\ip (i,";. (Coll. \\. and Sp.)

Dorsal aspect of a larger specimen. (Sniiio collection.)

TAr.AKoritiNTS ap. (?)

I'osterior view of a s)ieeinioii from rulnski Co., Ky. (','). Perhaps fn ab-

iiornial specimen ot J\ scrlolmtiis. (Coll. W. and Sp.)
Oral plates of tho same Q{).

70O

HEXAcniNus 0CCIDESTAM9 W. and Sp

Anterior view of tho type specimen. (Mns. Davenport Acad. Nat. Sci.)

}■

&:

Tacik
DicnocRiNt'8 PKXTALOBua (Cass. and Lyon) 775

Fig. 11(1. Lateral view of the type specimen; somewhat crushed. (Coll. S. S. Lyon.)
lib. The fixed brachials, enlarged (f).

lie. An imperfect specimen, showing parts of Iho pendant arms. (Coll. S. S.
Lyon.)

Hexacbinus Lea I (Lyon) 74(>

12a, Anterior view of type; the lower brachials and a few joints of the stem

restored from another specimen. ^Coll. S. S. Lyon.)
12b. Busal cup of same specimen.

DiCIlOCRISl'S SCITULl'S IIiiU 7G7

13a. Side view of a large specimen with arms, from the Lower Burlington lime-
stone. (Coll. W. and Sp.)

134. A small specimen from tlio Upper iturlington limestone. (Same collec-
tion.)

14. Side view of a specimen with arms from the same horizon. (Same collec-

tion.)

DiciiocRi.Nus I'EXDExs W. and Sp 774

15. Specimen with pendent arms from the Upper Burlington limestone. (Coll.

W. and Sp.).

DiciiocuiMs KICU8 Cass, and Lyon 774

IGa. Posterior view of the calyx. (Coll. W. and Sp.)
ICi. Side view of another specimen. (Same collection.)

i

'-■sSaJ

)

A Al.Ii'.KAiA

lT.\n. I..

li

,^-

■C;;

t

i!f:intn:« Fn'.*;:i? .', !*•■.■. .11

i

PLATE LXXIX.

Talarocrinus suuglobosus W. and Sp 78'J

Fig. In. Posterior view of the calyx. (Coll. W. ami Sp.)
16. Ventral aspect of the same specimen.

PiEROTocuiNus DEPRESsus Lyou and Cass 79(5

2(1. Lateral view of the type specimen. (Coll. S. S. Lyon.)

2/i. Lateral view of the calyx, showing two of the wings, (Coll. W. and Sp.)

2c. Dorsal aspect of the calyx. (.Same collection.)

2(/. Another type specimen, showing the wings in position. (Coll. S. S. Lyon.)

2e. A wing, showing the face of attachment

Pterotockixts ACUTi'S AVetherby 790

3((. Posterior view of the calyx. (Coll. W. anil Sp.)

3b. Anterior view of tlio same specimen.

3c. Ventral aspect of a specimen with two of the wings preserved, and the anus

covered by a Gasteropod. (Same collection.)
3'/. Anotlicr specimen, sliowing the wings in a side view. (Same collection.)
3i'. Dorsal aspect of a line specimen witli arms and wings. (Same collection.)
S/andg, 2 wings of a different species. (Same collection.)

Ptekotocrints ri'RAMinALis Lyon and Cass 798

4(/. TIio typo specimen ; lateral view of the calyx. (Coll. S. S. Lyon.)
4''. Dorsal aspect of the same specimen.

Pterotocrinus ciiesteressis Meek and Wortlien 802

5((. One of the type specimens; lateral aspect. (After Meek and Worthen.)
ail. Another type specimen, showing the posterior side of the calyx. (After
Meek and Worthen.)

Pterotocrinus capitai.is Lyon 7'Jl

C>a. Postero-l.ateral view of the type specimen. (Coll. S. S. Lyon.)
04. Ventral aspect of the same.

Ptkkotocri.vus cohon'arius Lyon 7y."

7". Venti'al aspect of the type specimen. (Same collection.)
71). Side view of the same ; the dorsal cup not preserved.

Tage
I'TEitoTOCRiNrs CHASSU3 JIt'L'k aiul AVurlhcii 801

Fit;. 8. Posterior view of the type specimen. (After Jleek and Wortlien.)

Pteuotocrin'us Aci'Ti's, var. BiPtmcATi-s Wetlieiby 801

0(1. Dorsal aspect of the type specimen. (After Wetherhy.)

01). Ventral aspect of the same.

10. Diagram, showing the arrangement of the lower brachials in Pterotocriiius.

i

Li

PLATE LXXX.

f I

ArKociitNTS Shumabdi Yaiidell .

P.AliE

801)

Fijj. 1, Lateral view of tlio type specimen. (Dr. Yaiulell's soUection.)
2. Fragmentary specinici: from Iluntsvillc, Ala. (Cull. W. and Sp.)
.'i. The lower part of tiie ilo-sal cup; from I'lilaski Co., Ky. (Coll. W. ami Sp.)

AcitociiiNis AMi'iioitA W. aiitl Sp 808

■1. A large specimen with portions of the arms and stem.

."i. A smaller specimen, enlarged (f).

(i. The caly.K somewhat llattened and enlarged ('{).

The right posterior ray forming tlio median lino of figure ; the anal inter-
radius occupying the left side.

7. Another specimen showing calyx and lower part of the arms (J).

8. Ventral aspect of a large specimen (f ).

9. A specimen showing the calyx, the pendent arms, the turned up pinnules, and

the stem.

(All in the collection of W. and Sp.)

AcROCRiNus WoBTiiENt Wachsmutli 807

lOrt. Diagram made from the type specimen in the Illinois State Museum.
104. Showing the outlines of the specimen.

a^^aiM

;; ; : A 'a:': a, a

m ^

w4m )

I

i ■■^•ox.«/'

V.

y

-\}--\VTr -jr.: •■.•.4

' I

PLATE lAXXI.

li

rig.

El CALVl'KK HIM > ( llASM s II, lU

1. A Very largo siiefiiiicii witli iinus. (C'mII. W. :iii(l Sji.)

•i. A siiiiiUiT speoiuifii with luuis. (Siunc I'olloi'tinn.)

;■,. Calyx vitli arms reiiiovi'il, loaviiit; the i);ii'titions mcloniiii; the arms. ifiMMo

I'ollt'cliuii.)
4. A siii'ciiiioii with an iiuusMally liinail hasc. (Sumo rcllcctiiin.)
f>. Ventral view of ealyx willi arms ami iPiirlUinns reiimved, showing the plaees

tor tho iittachnient of the arms. (Same eoUectiuii.)
0. SUdwiiig the inner floor of the disk. (Same collection.)
If. Inner Hoor of tlie third ring of jilates in the disk, enlarged. (Alter Mall.)
1,",, One of the plates of the third ring, enlarged.

•Ai.r

:!ij

El I .u.vi'To<niNt s Ki.uoDi S. A. Miller

7/1. A perfect specimen with arnus, from Waldroii, Iml. (Mas. I'oinp. Zool.)

7//. U.isal a.spect of the same.

S. A specimen from Ilartsville, Ind.. covered with elongate^ nodules. (('"11. W.

and Sp.)
W. Another speeimen, showing tie' calyx and partition walls. (Same eidlection.)
1(1. Another, showing the plates which form the partitions. (After Hall.)
11. The plates covering and surrounding the anus. (Coll. W. and Sp.)
IL'. The iilates constituting the ventral disk. Those forming tho two lower rings

showing the inner floor, those of the two upper the outer surface. (After

Hall.)
13. Inner floor of hasals and radials. (After Hall.)

;!;io

J!-.rl,- ■-.■.T.'i:.r

FiK. 1.

;<.

4.

PLATE LXXXII.

KlCALYl'TOCKINl'S (IVAI.IS Hilll

Stem ami root. (Coll. W. and Sp.)

Specimen with arms ami part of stem. (S.imo collection.)

Aiidtlier spoeimen sliowiii); the partitimi walls. (Same colleotion.)

A speeimeu with arms. (S;ime (Mllectioii.)

Showing the arm f.aoets. (Same collection.)

Showing tlio Kasals. (Same collection.)

•Ml

KU(ALYI'TO( UIM'9 MAliXlS WortllCIl

;m,s

lit

Dorsal aspect of the calyx. (.Vfter Worthcn, the basals corrected.)
Side view of Miller's type of A', iiiirbi/i. (After Jliller.)

KicAt.vrrocHiNi s I.jnpaim.i W. :ind Sp

A tine speeimeu with arms. (Illinois State Collection.)

KlCALYrTOClilNTS OHNATIS Mall ... ....

. Internal east of the dorsal cup. (Coll. \V. and Sp.)

EiiAi.YrToruiNis Koaxi S.A.Miller.

.■U7

3-l(»

X,2

11.
11'.

l;!.

II.

lo.

Internal east of the ealyx. (Coll. \V. and Sii.)
riie anal tnlo'. (I'oll. \V. C. K^'an.)

EfcALYrTocHixis Ti uiiiNATis S. \. Miller. . .
Internal cast of calyx. (CipII. AV. and Sp.)

EUCALYI'TOI UI.Nl'.S riloUO.HCHlAI.IS .Miller. . , .
Internal cast; the type specimen. (.Vfter Miller.)

EicAi-vrTociiisis nrcoius I'hillips.

A specimen from Dudley. England. (Coll. \V. and Sp.)

Figured for comparison with E. ileeoriis Hall.

.V.l

3r>2

\

I

I

^.^n II ■■IIWM

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4

PLATE JAXXUI.

Kic ALViTKiuiM !i ixcoxsi'iaiis Kiiiguubt'ig

Fiy. 1. Tlic tviu' siiociiiicii. (Cull. Dr. Uiiiguebeig.)
i.'. A siu'ciiiifu with arms. (Suiiiu collectiun.)

KrcAi.YrTociuxis DKruns.si s S. A. Miller

3. The calyx ami the iiartitioii walls eiichisiiii,' •■'"-' anus. (Cull. \V. C. ligaii.)
4<(. A natural oast 111' another sjieeiiiiuii; lateral view. (Same cullectioii.)
4^ liasal aspect of aimtlicr speeimen. (.Same coUeetiun.)

En Ai.vrrnriuxis cELArrs Ilall

o. A iihim|> spei-imen frum Kiiehester. (Coll. \V. and Sj..)

0. A erusheil specimen from Lockport, showing the ornamentation. ^CuU. Dr.

liingnebert;.)
7. A very yonng speeimen referred to this species with some doubt (j). (Mas.

Conip. Zoul.)

I'Al.K

.^i'.»

330

Kn Ai.vi'Toc liENi s Tiiirui ii.ATis S. A. Miller

cS. One of the type specimens. (Mas. Com|i. Zui)l.)
II. Another type specimen. (Same colleetion.)

10. Type of E. murnlis Kingueberg (from his collection).

Ei< Ar.YPTociuxfs vKxriiicosrs W. and Sp. . .

11. Speeimen with arms. (.Mus. Cnnip. Zoiil.)

12. Dorsal aspect of the caly.K. (Coll. W. and Sii.)

EicALvrTocuixr.s ohcoxhis Hall

l;). Natural cast of the dorsal cup. (Coll. Thomas A. Cireene.)
Cai.i.ii uixi s liKAciii.KKi \V. and Sp

1 !•'. Lateral view of the calyx. (Coll. W. ami Sp.)

M''. Another view of the same specimen, showing the partition walls to their
full length.

CAI.t.K IMXIS (iJliXlTlS Hall

1.'). Natural cast of the calyx. (Coll. Thomas A. Greene.)

10. Im|iression from a natural moidd. (Same collection.)

17. I'robably an nndescribed variety of C. cuniutii.i. (Same collection.)

Cai.i.h'isixus ACAXTiiixis Ringucbcrg

if<. Inner aspect of the dorsal cup; the type specimen. (Coll. Dr. Uingueberg.)

337

311

353

3j5

357

350

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PUBLICATIONS

OK TIIF.

iMUSEUM OF COMPARATIVE ZOOLOGY

AT HARVARD COLLEGE.

Tlioio have been published of the Biillktin» A'ols. I. to
XXIX.; uf the Mkmoirs, Vols. I. to XXII.

Vols. XXVIII. aiiJ XXX. of the IIullktin, and Vols. XIX.
and XXIll. of the Mkmoiks, are now in coui-ho of publication

A price lint of the puhlicatiom of the Mineum will lie sent
OH applifalion to the Director of the Mueeum of Comparative
Zoiiloi/jf, Cambridye, Mam.

ALEXANDER AGASSIZ, Director.

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