JOG, 



\e actual sizes are shoum by the small outline drawings.) 



and two branchial arches, and indications of the hyomandibular 

 if the eye. 2. Embryo at the time of hatching, from the right side, 

 , with well developed external gills, nose, and eye. 4. Larva from 

 ilit'itc'O; the transverse fold indicates the rudiment of the operculum. 

 , 6. From the left side : showing the beak, nose, eye, opening of 

 From the right side, showing the developing hind limb, and the 

 he tail beginning to shorten : the fore limb seen through the trans- 



Beiween pages gS and 99. 



