SECTION L ij 



Hiftory of Senegal, p. 27, an accurate Au- 

 thor, who would methodize teftaceous 

 animals by the Fiffi and not the Shells, 

 defcribes the Libot or Black Limpet found 

 on that coaft. In his defcription, he fays, 

 that fuch a vaft variety of differences is to 

 be obferved in this fpecles, that it is diffi- 

 cult to meet with two Shells alike; and 

 any perfon would be led to conclude that 

 they were abfolutely diftinfl: fpecies, did 

 not the fi(h, or animal, prove the con- 

 trary, by being the fame in all. The 

 Shells differed in colour and form ; fome 

 were white, others grey, afhen, or 

 black ; very flat, or very raifed, or copped, 

 the number of furrows unequal, from 

 twenty-five to fifty, and are at times fet 

 with fmall prickles. The jaggings or 

 toothings of the contour alfo differed 

 widely ; fome being fmall, or meerly 

 notches, while others were fo flafht, or 

 deep, that they gave the whole Shell the 

 form of a ftar with five or feven rays. 



After 



