MARINE MOLLUSCA OF THE UNITED STATES. 2% 
Subgenus Trophon, Montfort. 
Shell fusiform, varices numerous, lamelliform or laciniated; 
spire prominent; aperture ovate; canal open, usually turning to 
the left; columella smooth, arcuated. 
These animals inhabit deep water in the Arctic Seas; they are 
distinguished from the typical Fuside by their smaller size and 
lamellar varices. 
1..T. truncatus, Strom. Fig. 39. 
(Buccinum.) Norsk. Vid. Selsk. Skr., iv. 369, t. 16, f. 26. 
Trophon clathratus, Forbes & Hanley, Brit. Moll., iii. 456, t. 111, f. 1, 2. 
(not Murex clathratus, Linn.) 
Murex Bamfius (part.), Donovan, Brit. Shells, v. 169, f. 2. 
Shell small, brownish, with six rounded whorls ornamented with 
numerous sharp lamellar longitudinal ribs; aperture rounded, 
columella arcuated, canal turned to the left. 
Length 13, diam. 6 mill. 
Maine, northwards ; Hngland. 
9. T. SCALARIFORMIS, Gould. Fig. 40. 
(Fusus.) Silliman’s Journ. Sci., xxxviii. 197. 
Murex Bamfius (part.), Donovan, Brit. Shells, v. t. 169, f. 1. 
Shell reddish-brown; whorls seven, convex, with deep sutures ; 
fifteen to twenty blade-like ribs disposed longitudinally on the 
surface; aperture rounded, canal slightly turned to the left. 
Length 43, diam. 20 mill. 
Massachusetts, northwards. 
Larger, with one more whorl than 7’. truncatus. 
3. T. MuRicatus, Montagu. Fig. 41. 
(Murez.) Test. Brit. 262, t. 9, f. 2. 
Shell small, yellowish or white; whorls seven, very convex; 
with ten conspicuous ribs crossed by elevated revolving lines, 
canal long and straight. 
Length 17, diam. 7 mill. ‘ 
Massachusetts, Hurope. 
Family BUCCINID A. 
Shell notched in front; or with the canal abruptly reflected, 
producing a kind of varix on the front of the shell. Carnivorous. 
Synopsis of Genera. 
Shell ovate, few-whorled, with a corneous epidermis; whorls yentricose ; 
aperture large, oval, emarginate in front; canal wide, truncated, dorsally 
