180 Annah of the South African Museum. 



It would seem advisable, therefore, in the absence of definite 

 correlation with any hitherto-described forms, to make the form 

 the type of a new genus which can be called Macroscelesaurus, 

 with the full name of Macroscelesaurus janseni in honour of the ' 

 gentleman who transferred the specimen from a sheep-kraal wall 

 to the Museum collection. 



Type. Sandstone slab with almost complete skeleton (in mould) 

 S.A.M. Cat, No. 4004. 



Locality. Gemsbokfontein, Victoria West, C.P. 



Horizon. Lower Beaufort Beds (Tapinocephalus zone ?). 



ALOPECOGNATHUS MINOR, n.sp. 



The following description is based upon the almost perfect 

 skull of a medium-sized Therocephalian found by the Rev. J. H. 

 Whaits at Klipbank Siding, south-west of Beaufort West, in beds 

 which belong to the upper part of the Tapinocephalus zone. The 

 matrix is extremely hard, but it is possible to clear the bone, and 

 I have been able to discern most of the features of the occiput 

 and basicranium as well as of the upper part of the skull. 



The skull is long and narrow, the orbit lies in the middle of 

 the skull, the parietal crest is narrow and fairly high, and the 

 dental formula of the upper jaw is i6clm4. The skull, in its 

 general appearance and in the possession of 6 incisors, displays 

 affinities with Alopecognathus an(/usticeps. There are four molars 

 in the skull under description instead of six, the eyes are placed 

 further forward, and there are differences in the relative positions 

 of the teeth. Of the basicranial region of Alopecognathus angus- 

 ticcps no description has been given. In spite of the differences 

 mentioned I deem it advisable to keep the two forms in the same 

 genus, and I propose for the new form the name Alopecognathus 

 minor, sp. n. 



The premaxilla is small, and carries 6 incisors which occupy a 

 space of 31 mm. The 5th and 6th incisors are slightly smaller 

 than the others. 



The single large canine lies 10.5 mm. behind i6, and has a diameter 

 of 12 mm. Then follows a diastema of 8 mm., behind which are 

 4 small molars occupying 26 mm. The molars are short, but 

 robust, and flattened. All the teeth were probably finely serrated 

 along their posterior borders, the incisors and molars certainly so. 

 The snout is bluntly rounded. The nostrils are almost terminal, 

 and look nearly entirely upwards. They are longer than wide, 



