2O8 GEORGE W. TANNREUTHER. 



DESCRIPTION AND EXPLANATION OF SERIES OF DIAGRAMS 



A, B AND C. 



All drawings were made with the aid of the camera lucida, under a magnifica- 

 tion of about one hundred and fifty diameters and reduced one half. The drawings 

 were made from either living or mounted embryos and checked. Stippling was 

 adopted for sake of clearness. The text figures in the A series 1-15, represent the 

 conditions found in the female. Fig. A, 15 shows the condition of the female 

 embryo at the time of birth. The B series 1-15, represent the male embryos that 

 have undergone extreme degeneration. Fig. B, 15 is characteristic of the end 

 stage of development. The C series 1-15 gives the different stages in the develop- 

 ment of the normal male with the degenerative digestive system. The buccal 

 pouch and pharynx disappear before birth. Fig. C, 15 represents the condition of 

 normal male individual at the time of birth. 



