ON MAMMAL-LIKE REPTILES. 749 
2. The Deinocephalia, an Order of Mammal-like Reptiles. 
By D. M. 8. Watson, M.Sc., F.Z.8., Lecturer on 
Vertebrate Paleontology in University College, 
London. | 
[Received May 7, 1914: Read May 19, 1914. | 
(Plates IV., V.* & Text-figures 1-18.) 
INDEX. Page 
IGINGROGIECUNOS sedabo decoed soeBhe one coor once aacookee sen e OAT EC Racec EERE) 
Systematic : 
Mormosaurus seeleyi, gen. et SP. De ........cccccceeee vee ees 767 
Pnigalion oweni, gen. et sp. n. WES Ee See TOT: 
Lamiasaurus newtoni, gen. et sp. 1 Temes Ses SS ee ee erecey SOS, 
Structure : 
Tapinocephaloids : 
Skull, statement of material ................. ......0..... 750 
» Description ....... Gp Bone Ga Ra teecces soomepeny Goll 
Post-cranial skeleton, material ........... Basic spree cha LO 
S Description... .. 763 
Dentition SRB SSE Hae ARB iano coe SERS EEAGc HU ONR ACER LER Een ERT ame LOT A 
Titanosuchids : 
SkllctabeMmentT Onn abe ria) ieee ees en 7/GO 
6) IWESGRNAOM soo ccose Se stsnaasitects meee eed OO, 
Post-cranial skeleton, material irae OAT ch Te 773 
a ys IDESOMNUOD sciccocoobssascceesesocs 03 
General discussion : : 
Deuterosaurus a Tapinocephaloid ...... Bea seacrnone ane 
Rhophalodon compared with Titanosuchids ............. 774 
Affinities of Titanosuchus .. 774 
Relation of Deinocephalia ‘to other South African 
Therapsids ..... S Beak ded ender CAL 
Relation of Deinocephalia to Pelyco cosauria . es Lo 
The Auditory Arrangements of Therapsids ............... 779 
ANG WON SATO coneacdoo.saqvsoceocséosoncn ecdeseaddbndacnoskannena eufhers 
In 1851 Andrew Geddes Bain forwarded to the Geological 
Society of London a series of fossil bones from the River Gamka, 
Great Karroo, South Africa, which he recognised as different 
from all the others he had collected. 
These bones—a femur, humerus, ilium, vertebre, and portions 
of skull-bones—were the first fragments of a Deinocephalian to be 
found in South Africa. Many years before, however, the copper 
mines of the Ural Mountains had yielded fragmentary bones 
which were described by Kutorga; these are now known to 
belong to Deinocephalians. The first South African type to be 
described was TVapinocephalus atherstonei Owen, the snout of 
which was excellently figured and shortly described in the 
‘Catalogue of Fossil Reptiles of South Africa in the British 
Museum. In this work Owen described some vertebre and 
limb-bones belonging to Deinocephalia, but by a confusion in 
localities attributed many of them to Pariaswurus. Some years 
later Owen described the very fragmentary remains of Z%tano- 
suchus. 
* Wor explanation of the Plates see p. 786. 
| 51* 
