CEREBRAL COMMISSURES I.V THE VERTEBRATA. 



499 



Anura and Lepkloslren, for the chance of examining which last T have to thank 

 Mr. Graham Kerr, It Avoiilcl be impossible adequately to consider these forms here 

 without long descriptions and a large number of figures, and it would add com- 

 paratively little to the force of the above remarks. The general plan is identical with 

 that briefly indicated in the remarks on tlie Frog's brain ; and if the fallacies to which I 



Fit;. :J4. 



ne 



pam. 



A coronal section of the cerebral hemisphere of a foetal OrnithorhyiiclMs 

 in the precommissural region. 



Fis. 3.5. 



pans. 



A corresponding section — adult Hi/drosintnis. 



Fig. 36. 



pans.. 



A corresponding section — Rana. 



have already called attention in the works of Ramon y Cajal, Burckhardt, and to a lesser 

 degree of Gaupp, be borne in mind, the reader can have no difficulty in interpreting 

 arigbt the above-mentioned accounts of Osborn, Kingsbury, Burckhardt, and Fulliquet, 

 and the innumerable other recent accounts of the Ichthyopsidan brain. 



