?3. 



Pig. 61. Transverse section o f an enbrj'-o about 95 hears 



old, taken through, the otocysts. 

 Pig. 62. Transverse section through the liver pouohes of 



an embryo about 95 hours old. 

 Pig. 63. Horizontal section through the liver pouches of an 



embrvo of the sa^ne age. 

 Pig, 64. Median vertical section of an embryo about 10 



hours after casting. 

 Pig. 65. Transverse section of an embryo of the same age. 

 Pig. 66. Horizontal section through the dorsal portion of 



an enbrjj-o about 12 days old. 



