MARINE MOLLUSCA OF THE UNITED STATES. 29 
Synopsis of Species. 
A. Body-whorl angulated or carinated. No. 1. 
B. Body-whorl not angulated. 
a. Aperture narrow ; a strong, tooth-like plait on the columella. No. 2. 
b. Aperture broad. 
Shell thick, coarsely striated; with longitudinal folds. No. 3. 
Shell thin, finely striated ; with longitudinal folds. No. 4. 
Shell thin, finely striated ; longitudinal folds obsolete. No. 5. 
1. B. Donovant, Gray. Fig. 43. 
Zool., Beechey’s Voy. 128. 1839. 5 
Stimpson, Review of Northern Buccinums, Canad. Nat. Oct. 1865. 
Buccinum glactale, Donovan (not Linn.), Brit. Shells, v. t. 154. 1799. 
Buccinum tubulosum, Reeve, Icon. f. 105. 1847. 
Shell elongated, thick; spire long and tapering ; whorls 9, con- 
vex, with an obtuse carina at the middle of the body-whorl, some- 
times obsolete. This carina commences at the upper angle of the 
aperture. Longitudinal folds about thirteen, most distinct near 
the sutures, and often obsolete on the body-whorl except at the 
suture. Primary spiral grooves always double or triple in fresh 
and good examples. Primary ridges not much flattened, with 
fine secondary grooves upon them, but the middle groove is often 
somewhat deeper than the others. Aperture about two-fifths as 
long as the shell, and rounded. Columellar lip incurved above, 
and projecting below. Outer lip somewhat thickened and reflected, 
patulous, and broadly sinuated above about half-way between the 
suture and the junction of the carina. Periostraca very thin and 
not ciliated. 
Length 68, diam. 53 mill. 
Banks of Newfoundland, northwards. 
2. B. orntatum, O. Fabricius. Fig. 44. 
(Tritonium.) Fauna, Greenlandica, 401. 1780. 
Buccinum ciliatum (Fab.), Stimpson, Rev. of Buc. 1865. 
Buceinum cyaneum, Hancock (not Brug.), Ann. and Mag. Nat. Hist., 1 
ser. xviii. 828. 1846. 
Buccinum Molleri, Reeve, Icon. Buc. Errata. 1846. 
Tritonium (Buce.) tenebrosum, var. borealis, Middendorff (not Hancock), 
Mal. Ross. 162, t. 3, f. 7, 8. 1849. 
Shell rather small and solid, becoming very thick with age, 
elongated, oval, or sub-elliptical, appressed. Sutures not im- 
pressed; spire short; body-whorl elongated, and constituting 
seven-tenths of the length of the shell. Whorls not convex, not 
