VI 
LIST OF ILLUSTRATIONS. 
Calanus finmarchicus . 
minor 
Eucalanus attenuates 
monaehus 
Mecynocera clausii 
Paracalanus parvus 
Calocalanus pavo . . 
plumulosus 
Clausocalanus arcuicornis 
Centropages typicus 
liamatus 1 
bradyi 
Temora longicornis 
Metridia hibernica 
Candace pectinata 
Labidocera cestiva 
Pontella meadii 
Anomalocera pattersonii 
Monops regalis 
Acartia tonsa 
Corynura bumpusii 
Oithona plumifera 
similis 
Setella gracilis 
Miracia eft'erata 
Clytemnestra rostrata 
Oncsea venusta - - 
Sapphirina gemma 
Coryceeus elongates. 
carinatus 
Mya arenaria. Ten camera outlines of shells 
Mya arenaria, with shell 0.4 mm. long 
Mya arenaria. Form 2.3 mm. long 
Lobster tag 
Lobster Pots, old style and patent head 
Left lateral view of cranium of Micrcpterus salmoides. 
Left lateral view of skull of M. salmoides 
Right lateral view of skull of M. dolomieu 
Left lateral view of mandible of M. salmoides 
Left outer aspect of upper jaw of M. salmoides 
Inner aspect of opercular bones of M. salmoides 
Inner aspect of left half of shoulder girdle 
Outer aspect of part of shoulder girdle 
Calva leptostyla , 
Cordylophora lacustris 
Syncoryne mirabilis 
Corynitis agassizii 
Bougainvillia carolinensis 
Perigonimus jonesii 
Eudendrium ramosum 
dispar 
carneum and tenue 
album 
Hydractinia polyclina 
Stylactis hooperi 
Pennaria tiarella 
Corymorpha pendula 
Tubularia couthouyi, larynx, and spectabilis 
crocea 
Hypolytus peregrinus 
Clytia bicophora and noliformis 
grayi 
Campanularia poterium, hincksii, and volubilis 
minuta and ed wardsi 
neglectaand verticillata 
amphora and angulata 
calceolifera and flexuosa 
Obelia flabellata and commissuralis 
[ Obelia diehotoma, geniculata, and gelatinosa 350 
bicuspidata and longissima 351 
Gonothyrrea loveni and tenuis 352 
Ilebella pygmtea 353 
Lovenella grandis 353 
Opercularella lacerata 354 
Calycella syringa 354 
Lafoea dumosa and gracillima 356 
Ilalecium halecinum, articulosum, and tenellum 357 
beani and gracile 358 
Sertularia pumila 359 
cornicina and complexa 3G0 
Diphasia fallax and rosacea 361 
Sertularella abietina and tricuspidata 362 
rugosa, polyzonias, and gayi 363 
Thuiaria argentea : 363 
cupressina and thuja , 364 
Hydrallmania falcata 364 
Monostsechas quadridens 365 
Schizotricha tenella and gracillima 366 
Antennularia antennina 366 
americana and rugosa 367 
Cladocarpus flexilis 368 
Ilybocodon prolifer 371 
Stomatocha apicata 371 
Gemmaria cladophora 372 
Corynitis agassizii 372 
Perigonimus jonesii 372 
Coryne mirabilis 373 
Ectopleura ochracea 373 
Pennaria tiarella 373 
Dysmorphosa fulgurans 374 
Stylactis hooperi 374 
Turris vesiearia 375 
Turritopsis nutricula 375 
N emopsis bachei 376 
Bougainvillia carolinensis and superciliaris 376 
Lizzia grata 376 
Orehistoma tentaeulata 377 
Eutima mira 378 
Hebella calcarata 378 
Eucheilota duodecimals 378 
Tima formosa 379 
Obelia commissuralis and geniculata : . 380 
Oceania singularis 380 
Tiaropsis diademata 381 
Epenthesis folleata . 381 
Trachyriema digitale 382 
Gonionemus vertens 382 
Melicertum campanula , 382 
Rhegmatodes tenuis 383 
Sphyrtena helleri 387 
snodgrassi 388 
Anthias fuscipinnis 389 
Aphareus flavivultus 391 
Eupomacentrus marginatus 392 
Chromis velox 393. 
Chsetodon mantelliger 394 
sphenospilus 396 
Ostracion camurum 397 
Ovoides latifrons 398 
Tropidichthys jactator 399 
Eumycterias bitteniatus 400 
Scorptenopsis cacopsis 400 
eacopsis, dorsal view of head 401 
Parapercis pterostigma 402 
Brotula marginalis 403 
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166 
167 
168 
169 
170 
171 
172 
173 
174 
175 
176 
177 
179 
180 
181 
182 
183 
185 
1S7 
187 
1S8 
1S9 
189 
190 
191 
192 
192 
194 
195 
195 
230 
248 
312 
313 
314 
316 
316 
317 
318 
319 
327 
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