BIOLOGICAL SURVEY OF WOODS HOLE AND VICINITY. 



71 



VII. Species taken at 



-fourth (42) or more of the stations for which bottoms of gravel or 

 stones were recorded. 



Porifera: 



Cliona celata (91). 

 Hydrozoa: 



Eudendrium ramosum (43). 



Hydractinia echinata (43). 



Tubularia crocea (44). 



Thuiaria argentea (47). 

 Actinozoa: 



Astrangia danae (98). 

 Bryozoa: 



Crisia eburnea (97). 



iEtea anguina (50). 



Bugula turrita (99). 



Schizoporella unicornis (96). 



Smittia trispinosa nitida (90). 

 AsteroidEa: 



Henricia sanguinolenta (82). 



Asterias forbesi (83). 

 Echinoidea: 



Arbacia punctulata (80). 

 Annul ata : 



Harmothoe imbricata (80). 



Lepidonotus squamatus (87). 



Nereis pelagica (93). 



Diopatra cuprea (70). 



Pseudopotamilla oculifera (42). 



Hydroides dianthus (118). 

 Ctrripedia: 



Balanus eburneus (63). 

 Amphipoda: 



Unciola irrorata (46). 

 Decapoda: 



Pagurus pollicaris (47). 



Pagurus longicarpus (106). 



Decapoda — Continued. 



Pagurus annulipes (93). 



Libinia emarginata (69). 



Cancer irroratus (71). 



Neopanope texana sayi (64). 

 Pelecypoda: 



Anomia simplex (83). 



Pecten gibbus borealis (51). 



Mytilus edulis (74). 



Modiolus modiolus (69). 



Area transversa (81). 



Nucula proxima (69). 



Crassinella mactracea (78). 



Cardium pinnulatum (55). 



Ensis directus (86). 



Cumingia tellinoides (59). 



Spisula solidissima (84). 



Clidiophora gouldiana (66). 



Corbula contracta (55). 

 Amphineura: 



Chaetopleura apiculata (55). 

 Gastropoda: 



Tritia trivittata (117). 



Anachis avara (127). 



Astyris lunata (103). 



Urosalpinx cinereus (79). 



Littorina litorea (42). 



Crepidula fornicata (113). 



Crepidula plana (103). 



Polynices heros (59). 



Polynices triseriata (48). 

 Tunicata: 



Amaroucium pellucidum (49). 



Amaroucium pellucidum constellatum (61). 



Didemnum lutarium (70). 



Of the 54 species in the foregoing list, only 4 are lacking from one or both lists for 

 Vineyard Sound, while 1 1 are not to be found in either list for Buzzards Bay. Thirty- 

 seven of the species (69 per cent) are common to the list for sandy bottoms. 



VIII. Species taken at one-fourth (28) or more of the stations dredged on muddy bottoms. 



Porifera: 



Cliona celata (31). 

 Actinozoa: 



Astrangia danae (28). 

 Bryozoa: 



Crisia eburnea (30). 



Bugula turrita (49). 



Schizoporella unicornis (35). 



Smittia trispinosa nitida (29). 



Asteroidea: 



Asterias forbesi (48). 

 Annulata: 



Harmothoe imbricata (35). 



Nephthys incisa (43). 



Diopatra cuprea (54). 



Ninoe nigripes (35). 



Cistenides gouldii (32). 



Clymenella torquata (36) . 



Hydroides dianthus (55). 



