[481] 
Tilyanassa obsoleta 
Nassa vibex 
Astyris lunata.........-.. 
Anachis avara ....... oan i 
Bittium nigrum........... 
Triforis nigrocinctus....-.. 
Argina pexata 
Mytilus edulis 
ee ee ee 
Molgula Manhattensis..._. 
Bugula turrita......-.---. 
Vesicularia dichotoma..... 
Obelia diaphana 
Obelia, sp 
Sagartia leucolena 
INVERTEBRATE ANIMALS OF VINEYARD SOUND, ETC. 
. MOLLUSCA. 
Gastropods. 
Page. 
479 | Littorinella minuta........ 
479 | Crepidula convexa........ 
479 | Dotocoronata............. 
306 | Elysia chlorotica.......... 
479 | Elysiella catulus.......... 
305 
Lamellibranchs. 
Page. 
309 | Pecten irradians........-. 
470 | Ostrea Virginiana 
-lscidians, 
Page. 
311 | Botryllus Gonuldii...... ants 
Bryozoa. 
Page. 
311 | Escharella variabilis ...... 
404 | Membranipora, lineata..... 
RADIATA. 
Acalephs. 
Page. 
327 | Hydractinia polyclina...... 
476 | 
Polyps. 
187 
Page. 
469 
479 
480 
480 
480 
Page. 
361 
472 
Page. 
oon 
910 
Page. 
312 
406 
Page. 
329 
III. 5.—ANIMALS LIVING ON OR AMONG PILES OF WUARVES, 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 
