484 
A. E. Terrill — Catalogue of Marine Mollusca. 
I have often dredged both the typical form aud the var. violacea 
in Eastport harbor and the Bay of Fundy, in 10 to 50 fathoms, 1864, 
1868, 1870. Messrs. Smith and Harger took large specimens of var. 
violacea on George’s and LeHave Bauks, 45 to 60 fathoms, on the 
“ Bache,” 1872. It has also been taken by the 17. S. Fish Com. par- 
ties in Casco Bay, 1873 ; Gulf of Maine, 110 fathoms, 1874 (typical 
form); off Cape Ann, 38 fathoms (typical), 1878; Massachusetts Bay 
and off Cape Cod, 27 to 31 fathoms, 1879; Halifax harbor, 16 to 33 
fathoms (both forms), 1877 ; off Martha’s Vineyard, 28 fathoms. The 
Gloucester fishermen have brought it in from the banks off Nova 
Scotia (lots 626, 642). 
This species occurs mainly on hard bottoms, of sand, gravel, peb- 
bles and shells; but I have also taken it on muddy bottoms. We 
have not yet taken it in our deep-water dredgings, off Martha’s Vine- 
yard, though it will probably be found there hereafter. 
Except when eroded, this species is scarcely liable to be confounded 
with any other of our coast. Worn specimens may easily be con- 
founded with B. decussata, which it often resembles in size and form. 
The two following species probably have not actually been found 
on the New England coast: 
Bela Trevelyana (Turton). 
Bela Trevelyana H. and A. Adams, Genera Rec. Moll., i, p. 92, 1858. 
Terrill, Proc. U. S. Tat. Mus., iii, p. 365, 1880. 
Pleurotoma Trevelyana Jeffreys, British Coneliology, vol. iv, p. 398, 1867 ; vol. v, p. 
222. pi. 91. fig. 8, 1869; Ann. and Mag. Tat. Hist., p. 332, 1876. 
? Bela Trevelyana G. O. Sars, Moll. Arctic* Torvegia?, p. 235, pi. 16, fig. 13, pi. ix, 
fig. 4. 
This European species has been recorded by Jeffreys from the Gulf 
of St. Lawrence (coll. J. F. Whiteaves). I have seen no American 
specimens that I can refer to it, without much doubt. A few small 
specimens, taken oil’ Nova Scotia, in 1877, have a strong resemblance 
to some forms of the European B. Trevelyana , and may, possibly, 
prove to be identical. 
Bela Sarsii Verrill. 
Bela cancellala G. O. Sars, op. cit., p. 224,- pi. 23, fig. 31, pi. viii, fig. 9 (non Cou- 
thouy). 
Bela Sarsii Terrill, Proc. U. S. Tat. Mus., iii, p. 364, 1880. 
The name, Sarsii , was. proposed by me for the species described 
and figured by Professor G. O. Sars as B. cancellata. It is a small, 
strongly sculptured, elongated species, with moderately convex, ob- 
