BIOLOGICAL SURVEY OF WOODS HOLE AND VICINITY. 



67 



Gastropoda — Continued . 

 Astyris lunata (18). 

 Eupleura caudata (40). 

 Urosalpinx cinereus (18). 

 Littorina litorea (28). 

 Crepidula fornicata (55). 



Gastropoda — Continued . 



Crepidula plana (46). 



Polynices duplicata (21). 



Polynices triseriata (30). 

 Cephalopoda: 



Loligo pealii (18). 



The number of species in the foregoing list (55) is slightly greater than that in the 

 one immediately preceding it (51). It will be shown later that the average number of 

 species per dredge haul was likewise somewhat greater in Buzzards Bay. This is true 

 despite the fact that in the aggregate about 25 per cent more species were taken in 

 Vineyard Sound than in Buzzards Bay. Of the 55 species contained in the foregoing 

 table, 33 (55 per cent) are common to the list for the Fish Hawk stations in Vineyard 

 Sound, while 22 are to be regarded as more particularly characteristic of Buzzards Bay. 

 On the other hand, 18 of the more prevalent species in the Sound list do not appear in 

 that for the Bay. Of the 22 characteristic Bay-dwelling species, 7 are annelids and n 

 are mollusks; the 18 species peculiar to the Vineyard Sound list are more diversified. 



The Phalarope and Blue Wing stations represent dredgings in the shoaler waters, 

 and are for the most part much closer to land than those of the Fish Hawk. The more 

 prevalent species from these stations will therefore be presented in separate lists. 



IV 



Species taken at one-fourth (10) or more of the Phalarope and Blue Wing stations in 

 Vineyard Sound. 



Porifera: 



PGrantia ciliata (21). 



Clionacelata (32). 

 Hydrozoa: 



Tubularia crocea (27). 

 Actixozoa: 



Astrangia danae (26). 

 Bryozoa: 



Crisia eburnea (50). 



Bugula turrita (42). 



Schizoporella unicornis (29). 



Smittia trispinosa nitida (25). 

 Asteroidea: 



Henricia sanguinolenta (36). 



Astcrias forbesi (24). 

 Echinoidea: 



Echinarachnius parma (31). 

 Annulata: 



Harmothoe imbricata (40). 



Lepidonotus squamatus (37). 



Nereis pelagica (51). 



Diopatra cuprea (35). 



Hydroides dianthus (47). 

 AMPHrpODA: 



Amphithoe rubricata (26). 



Corophium cylindricum (21). 

 Isopoda: 



Idothea phosphorea (30). 



Erichsonella filiformis (25). 



Decapoda: 



Crago septemspinosus (27). 



Pagurus longicarpus (46). 



Pagurus annulipes (44). 



Libinia emarginata (29). 



Cancer irroratus (33). 



Neopanope texana sayi (23). 

 Pelecypoda: 



Anomia simplex (41). 



Anomia aculeata (28). 



Pecten gibbus borealis (26). 



Mytilus edulis (42). 



Area transversa (36). 



Nucula proxima (25). 



Crassinella mactracea (32). 



Cardium pinnulatum (35). 



Callocardia morrhuana (20). 



Tellina tenera (31). 



Ensis directus (33). 



Cumingia tellinoides (23). 



Spisula solidissima (35). 



Clidiophora gouldiana (28). 

 Gastropoda: 



Tritia trivittata (59). 



Anachis avara (63). 



Astyris lunata (57). 



Urosalpinx cinereus (36). 



Littorina litorea (19). 



