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l::"IGrUE 217.-'Tag;elns gibbns, (p. 673;) natural size.218.-'ragelus divisus, (p. 67G;) natural size.219.-Callista convextlJ, (p. 681;) natural size.220.-"'.rottenia genlma, (p. 682;) enlarged.2Z1.-Cumingia tellinoides, (p. 67J;) natnTal size.222.-:~rfacomafragilis, var. fusca, (p. 676;) natural ~iz~~.
223.-Angulus tener, (p. 677;) natural size.224.-Angulus tenelluA, (p. 677 ;) natural size.225.-Tellina tenta, (p. 678;) natural size.226.-Kellia planulata, (p. 688;) enlarged.227.-Argina pexata, (p. 692;) natural size.228.-Scapharca transversa, (p. 691;) natural size.229.-Nucula delphinodonta, (p. 691 ;) enlarged.230.-Nucula proxilna, (p. 691;) natural size.231.-Yoldia sapotilla, (p. 6~9 ;) natural size.232.-Y oIdia IimatllIa, (p. 689;) natural size.
Fig. 225.~
Fig. 223.
Fig. 221
Fig. 2~iO.
Plate XXX.
Fig. 231.
Fig. 218.
Fig. 220.
Fig. 232.
Fig. 222.
Fig. 224.
Fig. 229.
Fig. 227.
Fig. 219.
Fig 217.
Fig. 228.
FIGrUE 233.-Crenella glandula, (p. 695.)234.-Mytilus edulis, (p. 692.)235.-Modiolaria corrugata, (p. 694.)236.-Modiolaria nigra, (p. 694.)237.-Modiola modiolus, (p. 69:3.)238.-l\fodiola plicatula, (p. 693.)
(All the fignres are of natural size, an!l froln Billlley'~ Gould, .Ira \\'U by 1~. S. Morse.)
J.;'Inrn)~ 2:J9.-A.llonlia acnleata, (p. G97 ;) lo,ver side, llfitllral size.240.-orhe saIne, upper side.~40a.-rrbeSallle, portions of the n ppel' sitle luagnified.241.-Anomia glahra, (p. 696;) profile vie,Y, natural size.242.-rrhe same, (p. 696 ;) lower side.~42a.-The sanIe, (p. 696;) S'oung, natural size.243.-Peeten irradiuns, (p. 695;) natural size.244.-Siliqua costata, (p. 675;) natural size.245.-Ensatel1a Americana, (p. 674 ;) natural size.
(The figures are frorn ninTl(>Y'~ nonlt1. dra'wn h.y I~. S. -.:\forsf'.)
EXPLAN-,-,,-TION OF PLl-\TE XXXIII.
FIGUHE 246.-Cynthia partita, variety stellifera, (p. 701;) natural size.247.-Cynthia carnea, (p. 701;) natural size.24A.-The same, (p. 701;) younger specimens, natural size.249.-Eugyra pilularis, (p. 700 ;) natural size.250.-Molgula Manhattensis, (p. 699 ;) smooth variety, natural size.251.-~Iolgulaarenata, (p. 699;) natural size.252.-Botryllus Gouldii, (p. 702;) colony incrusting the stem of Tubnlaria,
somewhat enlarged.253.-The same; one of the zooids, enlarged ten diameters; a, anal tube and ori
fice; 8, somach; g, groove and vessels along the edge of the branchialsac, inside; 0, left ovary; b, bud, attached by a slender stolon.
254.-Salpa Cabotti, (p. 706;) solitary individual, from the dorsal side, enlarged;h, heart; 8, small chain of salpre budding within the old one.
255.-The same; one of the individuals from a mature chain, three-quarterview enlarged; a, posterior or anal opening; b, anterior or branchialopening; 0, processes by which the individuals of the chain wereunited; h, heart; n, nervous ganglion; 0, nucleus; r, gill.
2G6.-Escharella variabilis, (p. 71~) ;) few of the cells., much enlarged.
(Figure 256 waR drawn by A... II.yatt; 234 and 255 were copied fro:n A. AgassIz; the others weredrawn by A. E. Verrill.)
Fig. 246.
~~~~~1~
lfig.254.
Fig. 247.
Fig. 249.
X XXIII.Plate .....
Fig. 248.
Fig. 251.
750
Fig. 255.
7:"H
Eugyra749
I!"ig. 253.
Fig. 252.
Fig. 256.
So. 7f};~
EXPL.L~NAr-r-'rON OF PLATE XXXI\T.
}~IGURE 257.-Alcyonidium l'al1l0SUlll, (p. 703;) a ~young unbranched specimen, enlargedt,,,"o diameters.
258.-Bngula turrita, (p. 712;) extremity of a branch, enlarged.259.-The same; a branchlet more highly magnified.259a.-The salue; a lJranchlet bearing ovicells.260.-Crisia eburnea, (p. 707;) a cluster of branches, enlarged.261.-'rhe same; a branch bearing an o,icell, more higbly magnified.262.-Meinbranipora pilosa, (p. 712 j) a fe\v of the cells, seen froln above,
magnified.262a.-The same; a single cell, seen in profile.263.-'rhe same; one of the zooids expanded.264.-~loI1iahyalina, (p. 713 ;) one of the zooids in expansion, highly nlaguified.
(Figures 257,259, 259a were drawn by A. E. \errill; the rest were furnished by A. Hyatt.)
Plate XXXIV.
Fig. 25ft
No. 766
Fig. 263.
Fig. 259. Fig. 25Ha.
I
Fig. 201.
No. 772
Fig. 260
No. 769 No. 77)
Fig. 2;>7.
754
Fig. 262.
No, 768
~"ig. 2fl2a.Eig.264.
No. 773
EXPLANATION OF PL.ATE XXXV.
FIGURE 265.-Leptosynapta Girardii, (p. 716;) anterior part of the body, enlarged onebalf.
266.-The same; perforated plates from the skin, and the "anchors," highlymagnified. .
267.-Echinarachnius parma, (p. 717 ;) upper surface with the spines partlyremoved, natural size; a, ambulacral zones; b, interambulacralzones.
268.-Strongylocentrot1l8 Drobachiensis, (p. 716;) side view, natural size.269.-Asterias arenicola, (p. 718;) dorsal view, somewhat reduced.270.-0phiopholis aculeata, (p. 719;) dorsal view" about one-half natural size
(Fi~llres 265, 266 were draWD by A... E. Verrill; 267, 269 were copied from A. Agassiz; 268, 270 weredrdwn by E. S. Morse.)
Fig. 207. Fig. 270.
617
Fig. 269.
R~~].6C,:;"!. ~
lJ.~~"'fff':::s,~./J'-!li.~~~,{,-,lJ~'
~~i3ff~~\)f)/j.'j/J+~;::,~:g1fI,t(}i:~(Il,,~·i;lcf{::r$ \.~~if!.ft!~'! \i'l~{))l;c.
~, 'jg~({", ..~{/g,f" (~1')~,W'f:~~__" ~,,,,, .3"'" ~>~~$~i'~~'~£'!l',"~'" ~~'Ii.gg3·::~ ,,,~:JJ:~""~.'~~;1~~:~~~".g~~~~~\J,\~.i ~'.~g,~ ,'.\;%'i~.r;.1i~?~.~,~.;.~.f#!.~fJ~.<,4,~~~~.",~W*&!~Ji#~"'i.q,'P;>~"(>~<'(~;";'~~'9~%~i%~jf~~~~~i~~~t~li~~~'
IHV",'JJI~IL".;i' r'./,0q.;'jx:?R:;''f:.......if..~ .....''.....•
"l;2~l IN'':''~'''''"'''. J( '(\1':,;;<~\~\~\~,,~~\,\~~\\
Fig'. 265.
Gl.6
Fig'.2fi6.
EXPLANATION OF PLATE XXXV"I.
FIGURE 271.-Aurelia flavidula, (p. 72:3;) upper side, about one-fourth the naturalsize.
272.-Dactylometra quinquecirra, (p. 724;) lateral view, one-fourth the naturalsize.
273.-Corymorpha pendula, (p. 736;) natural size.274.-Parypha crocea, (p. 736;) natural size.
(Fignre 272 was copied from A. Agassiz, Catalogue Acalephs j the others were copied from L. Agassiz,Contributions to Natural History of United StateR.)
FIGL'RE 275.-Zygodactyla Gr(l~nlandica, (p. 729;) profile vie","', one-half natural size,276.-Bou~ainvilliasuperciliaris, (p. 733;) a branch, llluch enlarged.277.-Pennaria tiarella, (p. 735;) a branch, natural size.278.-Tbe saIne; one of the hydroids, with medusro, buds developing at the
base of the proboscis.279.-Sertularia pumila, (p. 732;) part of a colony on a frond of sea-weed
natural size.280.-Sertularia argentea, (p. 732;) a branch bearing reproductive capsules
(gonothecre,) with the soft parts removed, much enlarged.281.-0belia commissuralis, (p. 728;) a branch bearing h~Tdroids and one
female gonotheca, much enlarged.
(Fi~nreA 27;> and 279 were copied from A. Agassiz; 276 and ~81 frolll T.J ...A.gassiz; 278 from J. I ..eidy ;77 and 280 'were dr~.l\vn by A. E. Verrill.)
Plate XXXVII.
Fig. 2.f'.
No. 606
No. 610
Fia;.277.
611
No.6U4
Fig. 278.
Fig. 280.
No. 612
Fig. 279.
No. 603
Fig. 281.
EXPI~AN-1~TION OF PLATE XXXVIII.
FIGURE 282.-H~ylJoCO<l0l1prolifer, (p. 736 ;) natural size, the head seen from the backside.
283.-Alcyonium carneuill, (p. 737;) three of the polyps ful1y_ expanded, muchenlarged.
284.-Sagartia leucolena, (p. 738;) natural size, in expansion, but the tentacles. are not fully extended; the '* indicates the long odd tentacle.
28r>.-Halocampa producta, (p. 7:38;) natural size, ,veIl expanded, but the bodymay be much more elongated.
286.-Epizoanthus Anlericanus, (p. 740;) a colony which. hac1 completely covered and absorbed a shell occupied by a hermit-crab, (Eupagnruspubescens,) which still lived ,vithin the cavity; the pol~rps are notexpanded, natural size.
287.-The same; one of the polyps in full expansion, natural size.
(Figure 282 was copied from L. AgRssiz; 286 :8 fron) tbe A.meI'ican Naturalist, drawn by E. S. Morse;the rest 'were drawn by A. E. VeITH1.)