134 PHYSIOLOGICAL SERIES. 



is placed beneath the 4th nerve. The relation of the 

 concave anterior surface of the cerebellum to the cerebrum 

 is very clearly shown. The flocculus is strongly marked. 



O.C. 138015. 



D. 170. The brain of a White Stork (Ciconia alba) from whieh 

 the right, hemisphere has been removed to show the optic 

 tract upon that side. The optic lobes are peculiarly pro- 

 minent. The emergence of the fourth pair of nerves from 

 the valve of Vieussens is clearly shown. The great interval 

 between the hemispheres and cerebellum is probably arti- 

 ficial. 0. C. 1380 A 33. 



D. 171. The brain of a Saddle-billed Stork (Epliippwrhynchus 

 scneyalensis) . This specimen is badly preserved, but shows 

 the rounded form of the hemispheres and their relations to 

 the optic lobes and cerebellum. 0. C. 1321 B c. 



D. 172. The brain of a Brazilian Cormorant (Phalacrocorax 

 hrasiliensis) showing its elongated form and long oval 

 hemispheres. O. C. 1321 A a. 



D. 173. The brain of a Heron (Ardea cinerea). 



FALCONIFOBMES. 



D. 174. The brain of a Sulphur-crested Cockatoo (Cacatua sul- 

 phurna). The hemispheres are remarkably large, extending 

 back so as to completely cover the dorsal surface of the 

 optic lobes. They are oval in shape, and have a strongly 

 marked "Sylvian" fissure upon their ventral surface, 

 behind which the hemisphere expands to form a very 

 definite pseudo-temporal lobe. Dorsal longitudinal furrows 

 are present, but in this specimen are indistinct. The 

 I 'a not- an- among the few Birds in which the cerebrum i& 

 longer than broad. The cerebellum and optic lobes an 

 relatively rather small. 0. C. 1321 fl. 



D. 175. The brain of a Cockatoo (Cacatua triton). This 

 -preimen shows similar features to the last, but owing to 

 its better state of preservation the cerebral furrows are 

 rjjore pronounced. O. C. 1321 Ga, 



