68 



BULLETIN OF THE BUREAU OP FISHERIES. 



Gastropoda — Continued. 

 Lacuna puteola (39). 

 Crepidula fornicata (55). 

 Crepidula plana (50). 

 Polynices heros (27). 

 * Polynices triseriata (35). 



Tunicata: 



Amaroucium pellucidum (25). 



Amaroucium pellucidum constellatum (23). 



Didemnum lutarium (24). 

 Pisces : 



Myoxocephalus seneus (22). 



The number of species here comprised is very close to those in the two lists immedi- 

 ately preceding it. Of the 54 species here present, 38 (70 per cent) were contained in the 

 list for the Fish Hawk stations of Vineyard Sound, 16 being wanting from the latter. 

 Conversely, the Fish Hawk list contained 13 species which do not appear in that for the 

 Phalarope. It does not follow, by any means, that a species which is limited to one or 

 the other of these lists is actually restricted as to depth or proximity to shore. Indeed, 

 most of them appear with considerable frequency in the dredgings of both vessels. Of 

 the 16 species which are confined to the Phalarope list, only 3 show a marked restriction 

 to the vicinity of the shore line. These are Amphithoe rubricata, Lacuna puteola, and 

 Littorina litorea. The last named, as is well known, is strictly littoral (i. e., intertidal) 

 in its habitat. The dredging records refer exclusively to shells, most or all of which were 

 doubtless transported from the shore by hermit crabs. On the other hand, of the 13 

 species restricted to the Fish Hawk list, only 6 give any evidence of a preference for 

 deeper waters than those dredged by the Phalarope and Blue Wing. These are Euden- 

 drium ramosum, Cellepora americana, Asterias vulgaris, Modiolus modiolus, Venericardia 

 borealis, and Astarte castanea. In the case of the last two species named, the avoidance 

 of the inshore waters is quite obvious. Of the others this can not be stated as confidently. 



V. Species taken at one-fourth (23) 



Porifera: 



Clionacelata (31). 

 Hydrozoa: 



Hydractinia echinata (33). 

 Actinozoa: 



Astrangia danae (33). 

 Bryozoa: 



Crisia eburnea (30). 



Bugula turrita (45). 



Schizoporella unicornis (25). 



Smittia trispinosa nitida (29). 

 Asteroidea: 



Asterias forbesi (39). 

 Echinoidea: 



Arbacia punctulata (29). 

 Annulata: 



Harmothoe imbricata (40). 



Lepidonotus squamatus (28). 



Diopatra cuprea (53). 



Pista palmata (25). 



Clymenella torquata (24). 



Hydroides dianthus (66). 

 Cirripedia: 



Balanus eburneus (27). 



of the Phalarope stations in Buzzards Bay. 



Decapoda: 



Crago septemspinosus (41). 



Pagurus longicarpus (59). 



Pagurus annulipes (48). 



Libinia emarginata (25). 



Neopanope texana sayi (37). 

 Pelecypoda: 



Anomia simplex (68). 



Pecten gibbus borealis (61). 



Area transversa (62). 



Nucula proxima (61). 



Yoldia limatula (26). 



Crassinella mactacea (39). 



Cardium pinnulatum (62). 



Lsevicardium mortoni (60). 



Venus mercenaria (41). 



Callocardia morrhuana (54). 



Tellina tenera (48). 



Ensis directus (68). 



Cumingia tellinoides (38). 



Spisula solidissima (28). 



Mulinia lateralis (30). 



Lyonsia hyalina (31) 



Clidiophora gouldiana (59). 



Corbula contracta (36). 



