1910. 



AND TirK MrLTITTJBRRC TLATA. 



■()l 



Iviiow tliat the wliole of Basutoland is on beds of tStormberg age ; 

 and as the Htonuberg beds ai-e situated above the Molteno beds, 

 which are known to be Rhi^tic, and as they contain remains of 

 true Crocodiles, we may safely assume that they are of Lower 

 Jui-assic age, and not Triassie as was supposed. 



The specimen, which consists of the almost perfect snout with 

 part of the interorbital i-egion. portions of the malar arch, and 

 the con^plete pa.late, was described l)y Owen at some length, and 

 his figures have been frequently repi'oduced. Owen's opinion 

 that Tritylocloii was a mammal was supported by Oo))e, Osborn, 

 Lydekker, Seeley, and others. In 1894, however, Seeley, as the 

 result of his examination of the Cynodont reptiles, came to the 

 conclusion that 7\-it>/lndo/i\v<\s really a slightly nuxlified Cynodont 

 reptile ; and this view has been followed by a, number of later 

 writers. 



Text-fio-. 67. 



Sido view of Snout of TritijJodon longcemis Owen. Nat. size. Slightly restoreil. 



Fi: Frontal. Ju. Jugal. La. Lachrymal. Mx. Maxilla. Xk. Xasal. 

 Fa. Palatine. Pni.i: Preniaxilla. Sm.r. Septoniaxilla. 



In 1904 I endeavoured to show that none of the arguments 

 advanced by S?eley in favour of Tritylodoi), being a reptile wei-e 

 valid, l)ut That in all points 'J'rittilndon was an uniloubted 

 mammal. 



