Class IV. P R I . D E. Si 



ty, being found in others of the Englijh rivers, 

 where, inftead of concealing themfelves under the 

 ftones, they lodge themfelves in the mud, and ne- 

 ver are obferved to adhere to any thing like other 

 lampreys. 



The body is marked with numbers of tranfverfe 

 lines, that pafs crofs the fides from the back to the 

 bottom of the belly, which is divided from the 

 mouth to the anus by a ilrait line. 



The back fin is not angular like that of the 

 former, but of an equal breadth. The tail is Ian- 

 ceolated, and fharp at the end. 



Vol; hi. G Body 



