106 LESSER LAMPREY. Class IV. 



2. Lesser. La Lamproye d'eaue doulce. Nein-oga, natting. Faun. 



Belon, 67. Suec. No. 29O. Petromyzon 



Lampredse alteram genus. pinna dorsali posteriori an- 



Gesner pise. 5Q7- gulata. Ibid. 



Lampetrse medium genus. Gronov. Zooph. No. 15Q. 



JVil. Icth. 106. Raii Syn. La petite Lamproie. Block. 



pise. 35. ichth. iii. 34. tab. 78. Jig. 1. 



Neunaugen. Kram. 282. Le Petromyzon Pricka. De la 



Petromyzon fluviatilis. Lin. Cepede. Hist, des Poissons, 



Syst. 394. Gm. Lin. 1514. i. 18. 



Descrip- jlHIS species sometimes grows to the length 

 of ten inches. The mouth is formed like that 

 of the preceding ; on the upper part is a large 

 bifurcated tooth : on each side are three rows 

 of very minute ones ; on the lower part are 

 seven teeth, the exterior of which on each side 

 is the largest. The irides are yellow. In this, 

 as in all the other species, there is between the 

 eyes, on the top of the head, a small orifice of 

 great use to clear the mouth of the water that 

 remains on its adhering to the stones, for through 

 that orifice it ejects the fluid in the same manner 

 as cetaceous fish. On the lower part of the 

 back is a narrow fin, beneath that rises another, 

 which, at the beginning, is high and angular, 

 then grows narrow, surrounds the tail, and ends 

 near the anus. The color of the back is brown 



