194 

 Bela exarata (Moller). 



Defrancia exarata, Moller (1842). 



Bela exarata, H. and A. Adams (1858) ; G. O. Sars (1878) ; et auct. 



" Seal Cove, Grand Manan Island, 5 to 8 fathoms (8 specimens) H. E. 

 Webster, 1872. Halifax Harbour, stations 72, 73, in 18 fathoms, 1877. 

 U. S. Fish Commission" (Verrill, 1882; op. cit. p. 468. 



Off Grande Greve, Gaspe Bay, dredged by the writer in 1867. "Common 

 along the whole coast " of Labrador (Packard). " Three were dredged at 

 L'Anse au Loup " (on the north side of the Strait of Belle Isle) " with sand 

 and kelp " by the Stearns' expedition, according to Miss Bush. 



Bela concinnula, Verrill. 



Bela exarata, Verrill (pars) ; 1880. 

 Bela concinnula, Verrill (1882). 



"Halifax Harbour, 16 to 21 fathoms ; and off Halifax, 42 fathoms, 1877. 

 The specimens from Labrador were sent as B. exarata by Dr. A. S. Packard, 

 jr. This shell is closely allied to Bela exarata, and may ultimately prove to 

 be only a variety of the latter, as I formerly supposed, but it differs much 

 in appearance from the form that I have described as the true £. exarata. 

 The spire is much longer ; the whorls are flatter and more regularly turreted, 

 with more regular nodules on the shoulder ; the ribs are smaller, more 

 regular and more numerous ; the spiral cinguli are more numerous, and so 

 nearly equal to the ribs as to produce a very regular cancellation ; the 

 aperture is larger and longer, with a narrower and decidedly longer canal." 



" The shell figured by G. O. Sars as B. exarata strongly resembles this 

 species in general form and sculpture, and in the uncini, but it has a shorter 

 aperture and a wide, open canal, very unlike that of our shell. Whether 

 Sars' shell is identical with the true B. exarata is doubtful, for that was 

 described as having a short spire, while his shell has a long spire " (Verrill, 

 1882 ; op. cit., pp. 469 and 470). 



The Rev. Canon Norman, in the fourth part of his recent " Revision of 

 British MoUusca," * places B. concinnula among the synonyms of B. 

 exarata, 



Bela mitrula (Loven). 



Tritonium mitrula Loven (184G). 



Bela mitrula, G. O. Sars (1878). 



Beki concinnula, var. acuta, Verrill (1882). 



" Several specimens, agreeing closely with those of Europe, sent by Dr. 

 Friele, were found at Forteau Bay, 20 fathoms, and L'Anse au Loup, 10 to 



* Annals and Magazine of Natural History for August, 1899, Ser. vii., vol. iv., p. 132. 



