no 



Is dentated, or femicoftated : near the bafe it ufually has a 

 fingle tranfverfe ftrut larger than the reft, which has occa- 

 fioned it to be defcribed as flightly carinated : the aperture is 

 ovate, the outer lip thin, and in matured fpecimens rather 

 fpreading. Length two inches or more. 



It fhould appear from the defcription of moft authors that 

 the fingle flight ridge furroimding the body volution is a. 

 conflant chara6ler. A variety is mentioned in which the 

 fpiral ridge is obferved on all the volutions except very near 

 the apex ; and we are informed alfo that in others the outer 

 lip is not oniy fpreading but thick. 



STROMBUS. 



TuRBoFORMis. Shell with feven plain coftated volutions, deftitute of fpiral 

 Tab. 30. f. 7. Jtia ; the volutions are well defined by the line of fepara- 

 tion : the apex obtuie : the bafe fmooth : aperture fub- 

 orbicular, the outer lip thickened at the margin and a little 

 fpreading : colour pale rufous-brown, the mouth and apex 

 nearly white. The number of ribs are about eight ee. 

 Length rather more than a quarter of an inch ; breadth at 

 the bafe one thirdxjf its length. 



This fpecies has much the habit of Strotnhus cojlaius, but 

 is more coarfely ribbed, and deftitute of the thread-like fpiral 

 elevations tliat run round the bafe of each volution in tJiat 

 ihell. 



Inhabit 



