170 PHYSIOLOGICAL SERIES. 



large mesial (posterior) geniculate body and the great 

 corpora (juadrigemina of which the anterior pair arc 

 '-pccially prominent. The cerebellum conforms to t he same 

 ]lan as that of Sai'nijJiiltt*. But the mesial and lateral parts 

 of the region l>ehind the primary fissure arc unusually 

 prominent. They arc separated the one from the other by 

 exceedingly deep broad furrows in which large medullary 

 areas are exposed. The mesial " vermis" is twisted toward 

 the right and the lateral areas are expanded in a leather- 

 like pattern, such as is common in Carnivora, Edentata, and 

 other Mammalian Orders. 



F. E. Beddard, Proc. Zool. Soc. 1891, pp. 140-145. 



D. 203. A cast of the cranial cavity of a Tasmanian Wolf 

 ( Thylacinus cynocephalus) . 



This shows that the olfactory bulbs are laterally com- 

 pressed and of large size ; they are borne on long peduncles 

 so that they are placed almost wholly in front of the 

 hemispheres. 



The peculiar shape of the cerebral hemispheres is clearly 

 demonstrated, and the relatively small si/e of the pointed 

 apices which constitute the presylvian part of the hemi- 

 spheres is shown. The positions of the sulci described in 

 tin; actual brain are clearly indicated. 



The peculiar configuration of the cerebellum is also shown 

 in a very striking manner. 



Gervais, Nouv. Arch. Mus., t. v. 1869, p. 229. 



Family PERAMELIDM. 



D. 204. The brain of a Rabbit-Bandicoot (Thalacomyat lagotii). 



[This specimen lacks the greater part of its olfactory bu I br- 

 and tho projecting portion- of the cm-helium.] 

 The general features of this brain arc like those of the 



brain of Da9yuru$ } but the cerebral hemispheres are more 

 distinctly coniVal. 0. C. 1323 c h. 



D. 205. The brain of a Bandicoot (probably /'crameles nasuta). 

 Thi- .-peeimen \v:is labelled " I Jasyurus " in the old Cata- 

 logue: but the pointed cerebral hemisphere^, the pronounced 

 lateral "Spreading "of the caudal part- of the pyrilonn lobe.-, 



