430 



J. B. JOHNSTON 



Fig. 7 Emys lutaria, median sagittal section of the brain of an embryo slightly 

 more advanced than that shown in figure 6. 



Fig. 8 Human embryo, 31 mm. C. R. length, median sagittal section of brain. 

 Huber collection, No. XLVII. In the relations about the neuroporic recess 

 this embryo agrees essentially with the turtle embryos. 



