192 PHYSIOLOGICAL SERIES. 



Family TALPIDJS. 



D. 232. The brain of a Mole (Talpa europcea) (?), exposed 

 in situ. 



This simple, highly macrosnmtic brain resembles that of 

 the Hedgehog but shows signs of greater specialisation. 

 It is, however, smaller, more flattened, and the optic parts 

 of the brain are very poorly developed. 



Ganser, Morph. Jahrb., Bd. vii. 1882, p. 591. 



Family 

 D. 233. A cast of the cranial cavity of a Tupaia (Tujmia tana). 



Family CENTETID^E. 



D. 234. The cast of the cranial cavity of a Tenrec (Centetet 

 ecaudatus) . 



The olfactory bulbs are even larger in proportion to the 

 -i/.e of the brain than they are in the Hedgehog. 



Such brains as those of Centetes and Erinaceus enable us 

 to appreciate the characters of the earliest Eutheria, and 

 such forms as the Eocene Ungulate Dinoceras. 



In the case of Centetes, however, the small size of the 

 hemispheres is largely a secondary retrogressive change 

 which occurs in the development of each individual (For-vth 

 Major) . 



Suborder DBRMOPTBRA. 

 Family QALEOPITHECIDJS. 



D. 235. The brain of a Colugo (Galeopithecus volans), which ha> 

 been divided in the mesial sagittal plane; and the left 

 cerebral hemisphere separated from the brain-stem (fi<j 

 68, 69, and 70). 



This brain is of great interest because it presents a sei 'i- - 

 of \\cll-drtinrd cerebral sulci, and at the same time exhibit - 

 features which justify the lowly status usually accorded to 

 Galeopithecus in the mammalian 



