202 
Desc, Shell oblong-conical, with rather distant, longitudinal, 
prominent ribs, and distant prominent spiral striae, which by pas- 
sing over the ribs give the latter a crenate appearance, and are five 
in number on the body whorl and four on the second, the intervals 
with smaller parallel striae ) ribs about eleven on the body whorl ; 
volutions nine, a little convex ; suture indented, distinct ; aperture 
oblique, oval-orbicular ; labium concave ; color pure white, with 
reddish brown spots on the striae so arranged as to exhibit longi- 
tudinal and transverse series. 
05s. The regularly arranged spots on a white ground, give 
this species a very neat and delicate appearance. 
It was communicated by Mr. Elliott, who informed me that it 
inhabits the southern shores of Florida. PI. 49, f. 1. 
Cerithium septemstriatum.— character. With 
longitudinal costae and transverse striae ) the costae bifid towards 
the base ; volutions blackish, white above. 
Desc. Shell turreted, with longitudinal ribs rendered some- 
what nodulous by the passage of elevated spiral striae over them ; 
ribs thirteen on the body whorl, their interstices much more 
deeply excavated near the suture, and each divided into two on 
the basal half ; spiral striae on the body whorl seven, with smaller 
parallel striae between them, on the second whorl are four striae, 
and on the third three ; volutions nine ; suture not indented ; 
aperture oblique, oval-orbicular, dark livid within and not dis- 
tinctly striated ; labrum whitish on the upper margin, often inter- 
rupted by small brown lines corresponding with the exterior mar- 
gin slightly thickened; labium concave, with callus at the junction 
with the labrum, and with the canal livid ; color dusky or black- 
ish, the interstices of the striae often whitish, with a superior 
margin to the whorls. 
From Mr. Elliott. It is a very pretty shell, inhabiting the 
southern coast of Florida. I think that it approaches C. zonale, 
Erug., though it does not perfectly agree with Lamarck^s des- 
cription, particularly in not being longitudinaliter obsolete 
plicate,’^ for the folds in our shell are so prominent and robust 
as to deserve the name of ribs. 
It seems probable that Lister’s figure 81, of plate 1018, is in- 
tended for this shell ; to which figure Gmelin gave the name 
of Mur ex minimus. This practice of naming figures of older 
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