FOUND IN THE FRITH OF FORTH. 



555 



pETROMYZON. 



P. marinus. Spotted Lamprey ; Lamper-eeL 



This is found in the Frith, near the mouths of 

 the Almond and the Esk, in the spring season, 

 but not in any considerable quantity. 



Y.jluviatilis. Lesser Lamprey ; Nine-eyed-eel. 



This is abundant in the rivers Leith, Almond, 

 and Esk. The popular name Nine-eyed-eel arises 

 from the spiracles bein^ taken for eyes, 



