THE LAMPREYS 13 



Lamprey was first observed. Professor A. Miiller, 

 in 1856, described how he had watched Planer's 

 Lampreys spawning in a brook near Berlin and 

 had seen the eggs hatch out in about three weeks 

 and develop into Prides, previously known as 

 Ammoccetes branchialis. According to his further 

 observations, the larvae live three or four years 

 before they change into the adult form, the 

 transformation occupying twenty-six days or 

 more, and then they live only for a few months, 

 dying after spawning. The breeding habits of 

 this species are precisely similar to those of the 

 Lampern, and the season for spawning is the same. 



