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. 



Ohs. 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. PL 49, f. 1. 



Cerithium septemstriatum. — Specific character. With 

 longitudinal costae and transverse striae; the costse 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 strije 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 jimction 

 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, 

 Brug., 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 Murex minimus. This practice of naming figures of older 



