[481] INVERTEBRATE ANIMALS OF VINEYARD SOUND, ETC, 187 
MOLLUSCA. 
Gastropods. 
Page. Page. 
Illyanassa obsoleta........ 479 | Littorinella minuta........ 469 
Massa Wwibex . 2/1008. : .... 479 | Crepidula convexa....... . -479 
Aseyris TunataysVs les... . e47o |) Dot coranatae: 22%. 32... 480 
AmaGhis: avara. 22.2.5 252. 306 | Elysia chlorotica.......... 480 
Bittium nigrum...... woce.) ar Ore Mol wsiellan Cabal -2 - igi. 5! 480 
Triforis nigrocinetus.....-. 305 
Lamellibranchs. 
Page. Page. 
ATSING PEXAtAs..c'620 wee ns < oOo | PeCten. Trad tans’... ta arcaer 361 
MVulltiy edUhis. 25... et 5s 470 | Ostrea Virginiana....... Suey e 
Ascidians. 
Page. Page 
Molgula Manhattensis...-. ott) Botryllus Gouldi. 2: 4os-0) eyane 
Bryozoa. 
Page. Page. 
Us tis TULTiba: 5-62... s 311 | Escharella variabilis....... 312 
Vesicularia dichotoma..... 404 | Membranipora, lineata..... 406 
RADIATA. 
Acalephs. 
Page. | Page 
Obelia diaphana.......... 327 | Hydractinia polyelina...... 328 
Obelia, sp ..... PE eric 476 | 
Polyps. 
Page. 
eam itt LEMCOLONA).«.cnots,2aapcelity ea eee o2 oe oa alae odin Pak ie 
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 them 
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 
