PLATE 5 
EXPLANATION OF FIGURES 
20 Transverse section through the hind-gut of a 9.1 mm. larva of Amia calva. 
x 300. 
21 Transverse section through the hind-gut and sex-gland anlage of an 11.4 
mm. larva of Amia calva. > 300. 
22 Transverse section through the young sex-glands of a 16 mm. larva of Amia 
calva. X 300. 
23 Sketch to show the orientation of the sex-glands in a 40 mm. specimen 
of Amia calva as seen in transverse section. 
24 Detail drawing of the sex-gland as seen in above sketch. X 300. 
25 Drawing to show the orientation of the much reduced vitelline mass of 
an 11.4 mm. larva of Amia calva. 
26 Detail drawing of a portion of the vitelline mass indicated above. This 
shows the resemblance that certain cells of the peripheral entoderm show to sex- 
cells of this stage. XX 300. 
