115 



and the several limbs are extended in 

 trout instead of being reflexed. - V. 

 remnant, of the yolk-mass ; /;. develop- 

 ing heart; remaining letters as in 

 fig. <>. 



Kig. 9. Anterior extremity of same embryo, 

 viewed dorsally. and exhibiting the 

 'J still separated eyes. 



,. 10. Kmbryo in one of the last stages, and 

 considerably less magnified than those 

 mentioned above; lateral view. n. 



renal organ; remaining letters as in 

 fig. 8. 



I'l. I, XX. 



Diastylis Rathkei (KnA.-r), car; lemale. 



J'l. LXXI. 

 Diastylis Rathkei, vat: (continued); female. 



PI. LXXII. 



Diastylis Rathkei, <w. (continued); adult male. 



