Class IV. LESSER LAMPREY. 75 



The words Lampetra and Petromyzon^ are but of 

 modern date, invented from' the nature of the 

 fifh ; the fir ft a Lamhendo petras^ the other from 

 flirfoj, and Mi/cr^w, becaufe they are fuppofed to lick, 

 or fuck the rocks. 



La Lamproye d'eaue doulce. Petromyzon fiuviatilis. Lin. 28. Lessef.: 



Belon, 6j. fyft, 394. 



Lampredse alterum genus. Nein-oga, nattlng. Faun, 



Gef-ner pifc. 597. Suec. No. 290. Petromyzon 



Lampetra medium genus. pinna dorfali pofieriori an- 



JVil. Icth. 106. Raiijy?i. gulata. Ibid. 



pifc. 35. ^ Gronov. Zcopb, No, 159. 

 Neunaugen. Kram, 282. 



rx^HlS fpecies fometimes grows to the length of Descrif, 

 JL ten inches. 



The mouth is formed like that of the prece- 

 ding. On the upper part is a large bifurcated 

 tooth ; on each fide are three rows of very minute 

 ones : on the lower part are feven teeth, the exte- 

 rior of which on each fide is the largeft. 



The irides are yellow. As in all the ether fpe- 

 cies, between the eyes, on the top of the head, is a 

 fmali orifice of great ufe to clear its mouth of the 

 water that remains on adhering to the ftones, for 

 through that orifice it ejedls the water in the fame 

 manner as cetaceous fifh. 



On the lower part of the back is a narrow fin, 

 beneath that rifes another, .which at the beginning 



1% 



