70 ANOMODONTIA. 



extremity of the brain and of the inner aspect of the 

 nasal region. The cusped crowns of the cheek-teeth of 

 both the upper and lower jaws are well shown. The tusk 

 and upper cheek-teeth are figured by SeeJey in the ' Proc. 

 Hoy. Soc' vol. xliv. p. 137, fig. 3, to show the closure of 

 the pulp-cavity. Presented by G. S. Orpen, Esq., 1886. 



R. 1715. Cast of the brain-cavity and inner surfaces of an imperfect 

 (Fig.) skull ; from the Karoo system of Tafelberg. Figured by 

 Owen in his 'Cat. Foss. Kept. S. Africa,' pi. xx. figs. 1, 

 2, and pi. xxxiv. fig. 2, as Nythosaurus, of which it is the 

 type ; referred to the present genus by Seeley in the 

 ' Phil. Trans.' for 1889, p. 278. The cast of the anterior 

 portion of the brain and of the nasal region precisely 

 resembles that of the preceding specimen. The general 

 contour of the upper surface of the brain approximates to 

 that of the brain of Diadectes, described and figured by Cope 

 in the ' Proc. Amer. Phil. Soc' vol. xxiii. pp. 234-238, and 

 plate (1886) ; the cast of the parietal foramen, represent- 

 ing the pineal gland (o of Owen's figure), is, however, much 

 smaller than the latter. There is, moreover, no down- 

 ward flexure immediately behind this point, this flexure 

 not occurring till after the tubercle immediately behind 

 c of the figure, which appears to represent the optic lobes, 

 although correlated by Owen with the cerebellum. The 

 cerebellum appears to be immediately behind this tubercle, 

 the canals of the auditory capsule being clearly shown on 

 the left at this point. 



Presented by W. O. Atherstone, Esq., M.D., 1872. 



Genus SCALOPOSAURUS, Owen 1 . 



Dentition probably very nearly the same numerically as in 

 Galesaurus, but the upper teeth relatively smaller, and the cheek- 

 teeth taller and more slender, but the contour of their crowns 

 unknown. Skull much depressed, of a triangular form, with a long 

 muzzle, and the supratemporal f ossae scarcely larger than the orbits, 

 which are mainly directed frontally. Mandible very slender, with 

 the inferior surface of the symphysis sloping obliquely upwards. 



1 Cat. Foss. Kept. S. Africa, p. 24 (1876). 



