INTEKTEBEATE ANIMALS OF VINEYARD SOUND^ ETC. 481 



MOLLUSCA. 



Gastropods, 



Page. 



Illyanassa obsoleta 479 



Nassa Yibex 479 



Astyris limata 479 



Anacbis avara 306 



Bittium nigrum 479 



Triforis niaTocinctus 305 



Page. 



Littorinella inimita 469 



Orepidnla couvexa 479 



Doto coronata 480 



Elysia chlorotica 480 



Elysiella catuUis 480 



Lamellibranchs, 



Page. 



Argina pexata 309 



My tilus edulis 470 



Page. 



Pecten irradians 361 



Ostrsea Yirginiana 472 



Aseidians, 



' Page. 

 Molgula Manbattensis 311 



Botryllus Gouldii. 



Page. 

 375 



Bryozoa. 



Page. 



Bugula turrita 311 



Yesicularia dicbotoma 404 



Page. 



Escbarella variabilis 312 



Membranipora, Mneata 406 



RADIATA. 



Acaleplis. 



Page. 



Obelia diapbana 327 



Obelia, sp - ., 476 



Page. 

 Hydractinia polycliua ...... 328 



Polyps, 



Pa<xe. 



Sagartia leucolena , , 329 



III. 5. — Animaxs living on ok among piles of wharves, bhidoes, 



FLOATING TIMBER, ROCKS, ETC., IN BRACKISH WATERS. 



Tbe piles of wbarve^ in brackisb barbors are often inbabited by an 

 abundance of animal life. Tbe same species are mostly to be found also 

 on piles of wbarves in tbe purer waters of tbe sounds, and many of tbem 

 bave, tberefore, already been mentioned in a previous place, (p. 378.) 

 Tbere are some of tbese species, bowever, tbat appear to flourisb best 

 in waters tbat are decidedly brackisb. 



Among tbe most conspicuous of these is tbe beautiful Tubularian 

 S. Mis. 61 31 



