Class IV. LESSER LAMPREY. 79 



The words Lampetra and Petromyzon, are but of 

 modern date, invented from the nature of the 

 fifri \ the firft a Lambendo petras, the other from 

 niTfofc and Mucraco, becaufe they are fuppofed to lick, 

 or fuck the rocks. 



La Lamproye d'eaue doulce. Petromyzon fluviatilis. Lin, 28. Lessir, 



Belon, 6j. fyfi. 394. 



Lampredae alterum genus. Nein-oga, natting. Faun. 



Gefner pifc. 597. Suec. No. 290. Petromyzon 



Lampetra medium genus. pinna dorfali poileriori an- 



WiU Icth. 106. Raiijyn. gulata. Ibid. 



pifc. 35. Gronov. Zoopb. No. 159-. 

 Neunaugen. Kram, 282. 



THIS fpecies fometimes grows to the length of Bescrsf, 

 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 

 one's : 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 other fpe- 

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

 fmall orifice of great ufe to clear its mouth of the 

 water that remains on adhering to the Hones, for 

 through that orifice it ejects 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 



is 



