NERVOUS SYSTEM. VERTEBRATA. 



211 



There is a very well-developed " splenial " sulcus, pro- 

 bably representing the conjoint calcarine, intercalary and 

 genual sulci o other mammals. It extends much further 

 forward than the analogous sulcus in other Armadillos. 



The features of the typical, primitively simple mamma- 

 lian cerebellum are unusually clearly shown in that of 

 Cabassous (figs. 82, 83, 84, & 85). It closely resembles 



Fig. 82. (Nat. size.) Fig. 83. (Nat. size.) 



SECUN.F.... 

 10 B. POST 



PYRAMID. 



--..PARAFLOG. 



AREA C. 



MEQ.OB. "' 



Fig. 84. (Nat. size.) 



PONS.VAROL. 



Fig. 85. (Nat. size.) 



PRJW.F. 



AREA A. 



PARAFLOO. 



LOB. ANT. = Lobus centralis+Lobus 



culminis. 



ABE A A=Lobus clivi. 

 AREA B=Lobus cacuminis. 



... AREA B. 



PARAFiOQ, 



V MM FJ3D. 



CORP. PUAD. 



AREA c=Lobus tuberis. 



x = Lobus bi ventralis -f- Amygdala, 



LOB. POST. = Uvula -J-nodulus. 



that of the Rabbit except: that the large cake-like floccular 

 lobe (composed of flocculus and paraflocculus) is here sessile 

 and flattened against the rest of the cerebellum. 



0. C. 1323 i a. 



Elliot Smith, Trans. Linn. Soc., vol. vii. 1899, pp. 321 & 

 371. 



D. 269. The brain of a Three-banded Armadillo (Tolypeutes 

 tndnctus). 



This brain is like that of Cabassous, but is smaller. The 

 suprasylvian sulcus is absent, the orbital (presylvian) sulcus 



