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20 AMERICAN MARINE CONCHOLOGY. 
by a dozen rib-like undulations, and with numerous revolving 
lines; mouth oval, brownish within, canal short. Low water to 
fifteen fathoms. 
Length 25; diam. 15 mill. 
Inhabits the whole coast. 
Genus RANELLA, Lam. 
Extr. d. Cours. 1812. 
Shell ovate or oblong, compressed, with two rows of continuous 
varices, one on each side; aperture oval; columella arcuated; 
canal short, recurved; outer lip crenulated. 
The species are mostly tropical. They crawl with considerable 
animation and rapidity. 
1. R.caupatTa, Say. Fig. 18. 
Journ. Acad. Nat. Sci., Philad., ii. 286. 1822. 
Fusus pyruloides, De Kay. Moll., New York, 147, t. 9, f. 191. 1843. 
Eupleura caudata, Say. Stimpson, Am. Journ. Conch., i. 58. 1865. 
Shell solid, whorls five, with nine stout, vertical ribs, besides the 
varices, crossed by numerous revolving lines. Lip thick, bordered 
within by raised granules. Reddish-brown, white or bluish-white 
within. Operculum chestnut. 
Length 1 inch; width .65 inch. 
The head and tentacles and the siphon are nearly white, the 
foot light yellow. 
Massachusetts to Georgia. 
Genus FASCIOLARIA, Lamarck. 
Prodr. 1799. 
Shell fusiform; spire acuminated; aperture oval, elongated, as 
long as the spire; siphonal canal straight ; columella smooth, with 
a few oblique plaits at the forepart; outer lip internally crenate. 
Operculum claw-shaped. 
There are over one hundred species; tropical or subtropical in 
distribution. 
1. F. GigANTEA, Kiener. Fig. 19. 
Icon. Coq., Viv. Fasciolaria, p.°5, t. 10 and 11. 
Shell symmetrically fusiform, spire acuminately turreted; whorls 
somewhat obsoletely obtusely ridged throughout, scarcely angu- 
lated around the upper part, armed with large swollen tubercles; 
fleshy-white, covered with a subtransparent yellowish-chestnut 
horny epidermis, columella and interior of the aperture reddish. 
