338 



G. E. COGHILL 



R.Vis.X 



Fig. 71 Early swimming stage of Amblystoma microstomum Cope (No. 635, 

 section- 1-3-7). X 500. A transverse section of the embryo through the eye, 

 to show the nature of the ganglion cells of the retina and their fibers, which at 

 this time decussate in the most rostral portion of the postoptic commissure. 

 Silver impregnation after fixation in neutral formalin. 



