[489] INVERTEBRATE ANIMALS OF VINEYARD SOUND, ETC. 195 



Bryozoa. 



Page. 



Alcyonidinm Mrsutuin 487 



A. hispid nm 487 



Yesicularia gracilis 389 



V. cuscuta 404 



V.fusca 420 



Farrella familiaris 487 



Tubulipora flabellaris 405 



Crisia eburnea 311 



Bugula flabellata. . 

 Membranipora pilosa 

 M. lineata 



Escharella variabilis 

 Discopora coccinea 

 Lepralia, sp 

 Oellepora ramulosa 

 Pedicellina Americana 



Page. 

 311 

 406 

 406 

 312 

 333 

 420 

 312 

 405 



RADIATA. 



Eclimoderms. 



Page. 



StrongylocentrotusDrobachi- 

 eusis . . , 496 



Page. 



Asterias vulgar is . . 496 



Cribrella sanguinolenta 407 



AcalepJis. 



Page. 



Obelia pyriformis 390 



O. geniculata 487 



O. flabellata 390 



O. diaphana 327 



Campanularia flexuosa 327 



Page. 



Sertularia pumila 487 



S. argentea 408 



Peunaria tiarella 327 



Clava leptostyla 328 



Hydractinia polyclina 228 



Polyps. 



Metridiuin marginatuin 



Page. 

 329 



Sagartia leucolena. 



Page. 

 329 



IY. 2. SPECIES INHABITING THE SANDY SHORES OF THE OPEN COAST. 



Owing to the force of the waves the sand and gravel of the exposed 

 shores are kept in constant motion in stormy weather, and are often dis 

 turbed to a considerable depth, especially in winter. Therefore the con 

 ditions are very unfavorable for the existence of animal life. The fauna 

 of such shores is, accordingly, very meager, as compared with that of 

 the more sheltered sandy shores of the bays and sounds. 



It often happens that one may examine these sandy beaches fora mile 

 or more at low- water without finding more than half a dozen species of 

 animals that actually live on them, though many may be found thrown 

 up by the waves from below low-water mark. 



In coves or other localities that are somewhat sheltered, the number of 

 species is greater, and most of them are identical with those found on 

 the sandy shores of the sounds. 



Toward high-water mark the Talorcliestia longicornis (p. 336) and T. 



