[HI] INVERTEBRATE ANIMALS OF VINEYARD SOUND, I 187 



MOELtTSOA, 



Page. 



Illyanassa obsolota 470 



>'assa vilu'K 479 



Astyris lunata 479 



Anadiis avara 300 



l.ittium nigTum 479 



Tritbris nigrocmctus 305 



Littorinella minuta Mil* 



< Yopidula couvexa . ... 17!> 



Doto coronata 480 



Elysia chlorotica 480 



Elysiella catulus 480 



LamelUbranchs. 



Page. 



Argiua pexata 309 



Mytilus edulis . . ........ 470 



Page. 



Pecten irradians 361 



Ostraea Yirgiiiiana 472 



Ascidians. 



Page. 

 Molgula Mauhattensis 311 



Botryllus Gouldii 



Page. 

 375 



Bryozoa. 



Page. 



Bugula turrita 311 



Vesicularia dichotoma . . . 404 



Page. 



Escharella variabilis 312 



Membranipora, lineata 406 



EADIATA. 



Acalephs. 



Page. 



Obelia diapbaua 327 



Obelia, sp 476 



Hydractinia polyclina 



Polyps. 



Sagartia leucolena 



Page. 

 328 



Page. 

 329 



III. 5. ANIMALS LIVING ON OR AMONG PILES OF WHARVES, BRIDGES, 



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



The piles of wharves in brackish harbors are often inhabited by an 

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

 on piles of wharves in the purer waters of the sounds, and many of tln-m 

 have, therefore, already been mentioned in a previous place, (p. 378.) 

 There are some of these species, however, that appear to flourish best 

 in waters that are decidedly brackish. 



Among the most conspicuous of these is the beautiful Tubularian 

 14 v 



