130 FUSID A. 
canal, with an expanded or trumpet-shaped opening; proboscis 
exceedingly long, measuring nearly two inches even when 
contracted after the death of the animal; tentacles conical, 
rather short, and close together, with bluntly pointed tips; eyes 
small and black, seated on long stalks, about half-way up the 
tentacles; foot lanceolate, thick, rounded and double-edged in 
front; tail either pointed or blunt and somewhat truncated. 
SupraMity FASCIOLARIINA. 
FascroLaRiA, Lam. 
Etym.—Fasciola, a band. Syn.—Ioeranea, Raf. 
Distr.—14 sp. Tropical and Subtropical, world-wide. JF. 
distans, Lam. (xlviii, 85). £. aurantiaca, Lam. (xlviii, 86). 
Fossil, 30 sp. U. Cretaceous—. 
Shell fusiform; spire acuminated ; aperture oval, elongated ; 
canal open, moderate in length, nearly straight; columella 
smooth, with a few oblique plaits at the fore-part; outer lip 
internally crenate. 
The animal of Fasciolaria does not differ essentially from that 
of Fusus, nor do we find very much difference in the shells; the 
usually shorter spire, more swollen body-whorl, wider and shorter 
and flexuous instead of straight canal, and the oblique plaits 
near the fore-end of the columella, are the chief distinguishing 
characters. Between Fasciolaria and Fulgur the resemblance is 
much closer, and, until the dentition of the two groups became 
known, they were placed close together by systematists ; in 
Fulgur, however, the scarcely apparent folding of the columella 
is single, whilst in Fasciolaria it is double, sometimes triple. 
The Peristerniinze have columellar folds, but these are usually 
more transverse, are situated higher on the columella, and the 
shells are much smaller; indeed one of the characteristics of the 
Fasciolarias is the comparatively large size of the spevies, /. 
gigantea, of the southern Atlantic coast of the United States, 
attaining a length of nearly two feet—the largest of gastiopods. 
The distribution of the genus is tropical and subtropical, in 
shallow waters. But few living species are known, to which may 
be added some fossil forms, commencing with the cretaceous. 
The operculum is more claw-shaped than that of Fusus, and is 
rather large, filling the aperture. 
I have figured the nidimental capsules of F. tulipa, Linn. 
(xvi, 7). 
TEREBRISPIRA, Conrad. Shell of medium size, with spire 
much produced and canal short ; volutions convex, angular, and 
strongly spirally ridged ; plaits of columella not exposed exter- 
nally ; outer lip internally suleated. F. elegans, Emmons (xlviii, 
87). Miocene; Alabama. 
