151 



This is another fpecies of J^erita, with Tomewhat the con- 

 tour of JV.^/tfMa«a, but differs materially in the umbilicus; the 

 pillar lip refle6ls, and forms a large projedlion that narrows 

 the umbilical perforation, and occafions an indenture on each 

 fide of it ; the volutions are about the fame in number, rather 

 more lateral, and the fecond more tumid. 



Taken on the coafl near Dunbar m Scotland, by Mr, Laskey. 



A fhell very much refembling this, foraetimes occurs on 

 the coafl of Devon, but of a very mferior fize, the largeft 

 hitherto found being lefs than a quarter of an inch diameter. 

 The umbilicus in thefe forms a channel to the end of the pil- 

 lar lip, like IJbUx lacuna, and might be miftaken for that 

 fhell, was it not for the great diflference in their fubflance, 

 tliis being thick and ftrong, the other thin and fragile. Thefe 

 which we take to be the young of JV. rufa, are fometimes 

 pure white, others flefli colour, and fome of different fhades 

 of chefnut, and between that and purple ; the darker fpeci- 

 mens all pofTefs the wliite band round the top of the largefl 

 volution, and fometimes another below ; but the moll ele- 

 gant fpecimen has the body volution chefnut, with the white 

 girdle, and the umbilical regions the fame ; and the other 

 volutions of a fine pale purple. The great difproportion 

 between the fecond and third fpire in thefe fmaller fhells is 

 very confiderable, and caufes the fecond to be remarkably 

 round and. tumid. 



We are the more inclined to conclude thefe are the young 

 of JV*. rufa, as amongft a parcel of minute fhells taken on the 



fame 



