A. E. Terrill — Catalogue of Marine MoUusca. 
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 (Mdller). 
Tritonium craticulatum Fabr.. Fauna Gronl., p. 400, 1780 (non Linne). 
Trophon Fabricii (Beck) Moller, Kroyer’s Tidsskr., iv, p. 87, 1842. 
Trophon craticulatus G. 0. 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 TCelliugton Channel, Green- 
land, Iceland, Spitsbergen, Finmark, Bergen. Greenland, 35 to 80 
fathoms. Valorous Exp., — Jeffreys. Fossil in the Post-pliocene beds 
of England. 
The specimen from Davis Straits is 33 mm long ; breadth, 15 mm ; 
length of aperture, 18 mm . 
Anachis COStulata (Cantraine) Terrill. 
Fusus costulatus Cantraine (t. Monterosato), (non C. B. Adams). 
Columbdla Haliceeti Jeffreys, British Conch., iv. p. 356, 1867 ; v, p. 219, pi. 88, fig. 3. 
Anachis Haliceeti Terrill, Amer. Joum. Sci., vii, pp. 405, 412, 503, 1874. 
Pyrene costulata G. 0. Sars, op. nit. cit., p. 252. pi. 23. fig. 16, pi. x, fig. 2 (denti- 
tion). 
Anachis costvlala Terrill, Amer. Journ. Sci., xx, p. 392, 1880; Proc. Nat. Mus., iii, 
p. 406, 1881. 
Plate XLIII, figure 7. 
Gulf of Maine, at Cashe’s Ledge, Jeffrey’s Bank, etc., 30 to 114 
fathoms, — “ Bache,” 1873. South of Halifax, N. S., 95 fathoms, 
1877, and off Cape Cod, 67 to 96 fathoms, 1879, — U. S. Fish Com. 
steamer “ Speedwell.” Off Newport, R. I. and south of Martha’s 
Vineyard, 1880 and 1881, common in 146 to 506 fathoms, — steamer 
“ Fish 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 I., and 25 miles N. N.AV. of 
Unst, 85 to 95 fathoms, — Jeffreys. Lofoten I., 400 fathoms, — Sars. 
Fossil in the later European Tertiary deposits, Vienna, Messina, etc., 
— Jeffreys. 
Astyris diaphana Terrill, sp. nov. 
Astyris rosacea (pars) Terrill, Proc. Nat. Mus., iii, p. 408 (non Gould). 
Plate LTIII, figure 2. 
Shell thin, delicate, translucent, white, nearly smooth, elongated, 
