308 [October, 1843. 



when adult, there are 17 much less elevated, more irregular, and more obtuse 



tubercles. 



Buccintjm. 



1. B. protractum. Subfusiform, elevated ; with robust, flattened spiral ribs 

 about as wide as the interstices, both ribs and furrows crossed by distinct promi- 

 nent longitudinal lines ; aperture long and elliptical ; labrum with short, sub- 

 marginal prominent lines; beak slightly recurved. Length, one inch and a third. 



Locality. Calvert Cliffs, Md. 



2. B. lienosum. Obovate, with distant spiral flattened, not very prominent 

 lines, between which are usually 3 lines, the middle one largest; whorls of the 

 spire slightly convex ; body whorl ventricose; lines of growth distinct; colu- 

 mella with two distant plaits, the inferior one at the angle which is prominent. 



Length, one inch and two-thirds. 

 Locality. Calvert Cliffs, Md. 



3. B. (PoWia) Jilicatum. Short-fusiform, whorls 5 or 6, sub-scalariform, 

 with very prominent spiral stria, and one or two intermediate finer lines ; whorls 

 with longitudinal distant ribs ; aperture rather less than half the length of the 

 shell; beak short; columella with slightly prominent folds; labrum with acute 

 prominent lines obsolete on the margin, and extending far within the aperture. 



Locality. James River, Va. 



Resembles Fusus cinereus of Say, but is much shorter in proportion, and has 

 more prominent spiral lines ; but the folds on the columella constitute the most 

 marked distinction. 



4. B. sexdentatum. Acutely oblong-ovate, with regular prominent com- 

 pressed longitudinal ribs, and fine revolving lines, one or two of which, near the 

 suture are larger and more distinct ; towards the base the lines are more pro- 

 found ; spire elevated ; volutions 9, with straight sides ; suture impressed ; 

 aperture about one-third the length of the shell ; labrum with 6 dentiform tu- 

 bercles within. Length half an inch. 



5. B. bilix. Elliptical, thick, with alternated revolving lines crossed by 

 rugose lines of growth ; spire conical, volutions convex ; one or two towards 

 the apex longitudinally ribbed ; suture profound ; aperture about two-thirds the 

 length of the shell ; labrum ribbed within. Length one inch. 



Locality. James river, Virginia. 



6. B.fossulatum. Subovate with numerous impressed alternated revolving 

 lines; body whorl ventricose; whorls 4 or 5, sides convex ; spire somewhat coni- 

 cal, with a channel at summit of the volutions, which has a rectilinear slope to 

 the suture ; columella short ; fold at base of the shell acutely carinated. Length 

 one inch and a third. 



7. B. prseruptum. Ovate-acute, with longitudinal very regular and equal 

 compressed ribs, and regular revolving raised lines, about 12 on the body whorl, 

 at base of which is a broad fold with 4 revolving lines on it ; labium reflected ; 

 columella obliquely truncated at base ; aperture rather more than one-third the 

 shell's length. Length one-third of an inch. 



Cancellaria. 

 C. corbulu. Short, subovate ; whorls sub-scalariform ; ribs 8 or 9 on the 



