TAPIXOCEPHALHLE. 93 



closely resembles that of the lower incisors of Titanosuchus. 

 Although of the same general type, this tooth differs from 

 the upper incisors referred to Deuterosaurus in the ab- 

 sence of the inner basal lobe, and the prominent vertical 

 ridges on the lateral borders of the posterior aspect of the 

 crown. Purchased from T. Bain, Esq., 1878. 



b. Specimens of the dentition, some of which were referred 

 by Owen to Tapinocephalus. 



R. 848. A very large imperfect tooth ; from the Gouph district, 

 Beaufort West. The crown has lost its summit and is 

 otherwise imperfect, and tke lower part of the root is want- 

 ing. The crown and root have the same compressed form 

 as in the preceding specimen, although this tooth is of 

 considerably larger size. 



Purchased from T. Bain, Esq., 1880. 



-o v 



R. 1708. Fragment of a jaw showing on the polished surface sections 

 {Fig.) of teeth; from the Karoo system of the Cape. Figured by 

 Owen in his ' Catalogue,' pi. ii. figs. 1-3, where it is 

 described as part of the mandibular symphysis, and referred 

 to Tapinocephalus, being incorrectly stated to be one of the 

 specimens presented by Dr. Atherstone. A thin slice, now 

 mounted on glass, has been cut from the polished surface. 

 The sections of the teeth appear to be very similar to 

 those of Titanosuchus, au inner series of successional teeth 

 being shown. Presented by A. G. Bain, Esq., 1853. 



47089. Fragment of a jaw exhibiting sections of large teeth ; from 

 the Great Karoo district. Noticed by Owen in his ' Cata- 

 logue,' p. 28, no. 53. 



Presented by A. G. Bain, Esq., 1853. 



c. Specimens of vertebra? of which it is probable that a large propor- 

 tion are referable to the present family, although some may 

 belong to the Pariasauria. There is a probability that the 

 associated series first mentioned may prove to belong to Titano- 

 suchus. 



R. 1709. The centrum of an anterior dorsal vertebra; from the 

 Karoo system of Jan AYillem's Fontein l , Prince Albert 

 district. This specimen has been longitudinally bisected 

 in a vertical plane. It differs from the anterior dorsals 



