208 BIOLOGICAL SURVEY OF 



Turritidae 

 Bela Leach 



B. iNcisuLA Verrill. ( Verrill, 1882, Trans. Conn. Acad., vol. 

 5, p. 461, pi. 43, fig. 12.) A common form found generally 

 distributed but in small numbers. Reported from Eastport 

 to off Newport. 



B. NOBiLis (Moller). {Defrancia nohilis Moller, 1842, 

 Kr0yer's Naturh. Tidskr. ; B. nohilis G. 0. Sars, 1878, Moll. 

 Reg. Arct. Norv., p. 228, pi. 16, figs. 19, 20.) This easily recog- 

 nized form is also generally distributed. Reported from 

 Eastport to Cape Cod in 10 to 40 fathoms. 



B. HARPULARiA (Couthouy). (Fusus harpularia Couthouy, 

 1838, Boston Jour. Nat. Hist. ; B. harpularia Gould, 1870, Inv. 

 Mass., p. 352, fig. 621.) Common and widely distributed. Re- 

 ported from Eastport to off Block Island at various places, 

 10 to 50 fathoms. 



B. CANCELLA.TA (Mighcls aiid Adams). {Fubus cancellatus 

 Mighels and Adams, 1842, Boston Jour. Nat. Hist.; C. can- 

 cellata Verrill, 1882, Trans. Conn. Acad., vol. 5, p. 475, pi. 43, 

 figs. 10, 11; pi. 57, fig. 13.) Less common than the preceding, 

 and all taken from rocky bottom. Reported off Massachusetts 

 Bay and Cape Cod, 12 to 92 fathoms ; off Marthas Vineyard, 

 126 to 312 fathoms. 



B. PLEUROTOMARiA (Couthouy). (Gould, 1870, Inv. Mass., 

 p. 355, fig. 625; Verrill, 1882, Trans. Conn. Acad., vol. 5, 

 p. 478.) Reported by Blaney from 10 to 50 fathoms. Re- 

 ported from Eastport to off Chatham, various places, 10 to 

 122 fathoms. 



B. BiCARiNATA var. vioLACEA (Mlghcls and Adams). (Pleu- 

 rotoma violacea Mighels and Adams, 1842, Boston Jour. Nat. 

 Hist., vol. 4, p. 51, pi. 4, fig. 21.) This purple species of the 

 Belas is also a common form, but not taken in quantity at any 

 time. Reported from Eastport, Casco Bay, off Cape Ann, 

 off Cape Cod, Vineyard Sound, off Stonington. 



B. DECussATA (Couthouy). (Pleurotoma decussata Cou- 

 thouy, 1839, Boston Jour. Nat. Hist. ; B. decussata var. tenui- 



