NERVOUS SYSTEM. VERTEBRATA. 137 



COKACIIFORMES 



D.183. The brain of a Condor (Sarcorhamphus gryphus). The 

 hemispheres are much narrower and longer than in the 

 Fnlconiformes. They extend backwards so as nearly to 

 cover the optic lobes. The cerebellum and a great part of 

 the left hemisphere have been removed exposing the left 

 optic lobe and thalamus and the tectal commissure. 



O.C. 1321 N. 



PASSEBJFOKMES. 



D. 184. The brain o a Touraco ( Turacus sp.). This specimen 

 is not well preserved, but shows that the hemispheres are 

 globular and very moderate in size, extending back only 

 over the anterior third of the optic lobes. The latter are 

 somewhat exceptionally large. 0. C. 1321 G. 



D. 185. The brain o a Crowned Pigeon (Goura coronata). This 

 specimen differs little from the last. The hemispheres are 

 small and globular. They do not cover any part of the 

 well-developed optic lobes. 0. C. 1321 F. 



D. 186. A cast of the cranial cavity o a Solitaire (Pezophaps 

 solitarius), giving without doubt a trustworthy representation 

 of the brain. The hemispheres are of moderate size with 

 but slight indications of dorsal longitudinal furrows. They 

 are widely separated mesially, especially in their posterior 

 parts, and extend back over the anterior half of the optic 

 lobes. The latter are well developed and strongly depressed 

 towards the ventral surface. The cerebellum is of some 

 size ; its peduncles lie about midway between the anterior 

 and posterior extremities. In front it extends between the 

 hinder ends of the hemispheres. The hypophysis is small 

 and narrow. 



D. 187. The brain of a Lyre-bird (Menura superba) . The hemi- 

 spheres are of very large size. The area between each dorsal 

 longitudinal fissure and the mid-line is strongly developed 

 somewhat as in the Owl (D. 176). But instead of 

 the hemispheres being short, as in that case, they are re- 



