554 ALLIS. 
EXPLANATION OF PLATE XXXVI. 
Fics. 18 and 19. Young Amia, 13.6°™ long, shows most of the pores of the head 
divided into two, a few pores (/?) of the lateral line still single, and the surface organs 
of the dorsal line (a7). <2: 
Fics. 21 and 22. Three views of the adult head. Natural size. 
