A. E. Verrill— Catalogue of Marine Mollusca. 513 
mens, and therefore prefer to keep them as distinct forms, for the 
present, but without doubting the observations of the excellent natu- 
ralists referred to. 
Trophon Fabricii (Moller). 
Tritonium craticulatum Fabr., Fauna Gronl., p. 400, 1780 (non Linne). 
Trophon Fabricti (Beck) Moller, Kréyer’s Tidsskr., iv, p. 87, 1842. 
Trophon craticulatus G. O. Sars, op. cit., p. 248. 
Gulf of St. Lawrence, Orphan Bank,—J. F. Whiteaves. Davis 
Straits,—Scudder, 1879. 
This is a very arctic form, inhabiting Wellington Channel, Green- 
land, Iceland, Spitzbergen, Finmark, Bergen, Greenland, 85 to 80 
fathoms, Valorous Exp.,—Jeflreys. Fossil in the Post-pliocene beds 
of England. are 
The specimen from Davis Straits is 33™" long; breadth, 15™™ ; 
length of aperture, 18™”. 
Anachis costulata (Cantraine) Verrill. 
Fusus costulatus Cantraine (t. Monterosato), (non C. B. Adams). 
Columbella Haliweti Jeffreys, British Conch., iv, p. 356, 1867; v, p. 219, pl. 88, fig. 3. 
Anachis Haliweti Verrill, Amer. Journ. Sci., vii, pp. 405, 412, 5038, 1874, 
Pyrene costulata G. O. Sars, op. ult. cit., p. 252, pl. 23, fig. 16, pl. x, fig. 2 (denti- 
tion). 
Anachis costulata Verrill, Amer. Journ, Sci., xx, p. 392, 1880; Proc. Nat. Mus., iii 
p. 406, 1881. 
’ 
PLATE XLIII, rigure 7. 
Gulf of Maine, at Cashe’s Ledge, Jeffrey’s Bank, ete., 30 to 114 
fathoms,—‘“ Bache,” 1873. South of Halifax, N. 8., 95 fathoms, 
1877, and off Cape Cod, 67 to 96 fathoms, 1879,—U. 8. Fish Com. 
steamer “Speedwell.” Off Newport, R. I and south of Martha’s 
Vineyard, 1880 and 1881, common in 146 to 506 fathoms,—steamer 
“Wish Hawk” (abundant at stations 894, 365 fathoms, and 1038, 146 
fathoms). Off Chesapeake Bay, station 898, 300 fathoms. North of 
Hebrides, 170 to 650 fathoms, off Faroe L., and 25 miles N.N.W. of 
Unst, 85 to 95 fathoms,—Jeffreys. Lofoten I., 400 fathoms,—Sars, 
Fossil in the later European Tertiary deposits, Vienna, Messina, ete., 
—Jeftreys. 

Astyris diaphana Verrill, sp. nov. 
Astyris rosacea (pars) Verrill, Proce. Nat. Mus., iii, p. 408 (non Gould). 
PLATE LVIII, FrauRE 2. 
_ Shell thin, delicate, translucent, white, nearly smooth, elongated, 
