THE ceeebhxtm: oe peosencephalon. 169 



tory apparatus; furthermore, this area sends out a separate bundle which 

 probably ends in the thalamus. Of those cortical portions depicted in Fig. 

 103, the one designated as dorso-median area is especially interesting. It 

 covers the whole median side of the brain, passes the dorso-median edge, 

 extends out laterally over the outer surface of the brain, and includes that 

 olfactory bundle mentioned in the last chapter. External to this and sepa- 

 rated from it by a narrow cleft lies another interesting cortical portion. 

 This, the dorsal area or plate, covers not only the dorsal portion of the 



Fig. 117. — Section of cortex near median dorsal edge of the mantle of 

 Lacerta agilis. Golgi .staining. 



outer wall, but turns toward the median line on the ventral surface covering 

 the epistriatum. These relations are preserved throughout life in the turtle. 

 They are well shown in Pig. 118. Note, also, in this figure how the medul- 

 lated tangential layer bends inward toward the epistriatum. Note, also, the 

 Tr. bulbo-epistriaticus. Ventral from the dorsal plate lies the lateral plate, 

 which adheres closely to the striatum (is possibly identical with it), called, 

 in mammals, the Claustrum. 



It; is interesting to note that the cortical area which receives the oft- 

 mentioned olfactory bundle remains on the inner edge of the hemisphere, 

 not only in the reptiles, but also in mammals. In most reptiles it presents 



