Annals of the Transvaal Museum. 
216 
corners of the rims of the orbital cavity. Breyeri is narrower over the 
parietals. Jorisseni and platyceps are broader over the parietals. 
Platyceps and Jeppei have a much broader snout. In Putterilli the pre- 
parietal is nearly round. A comparison with Mccaigi is nearly impossible. 
The exact length of the premaxillary of Theileri cannot be obtained as 
the bone is damaged. An estimate of its length gives 63 mm. This 
means that the premaxillary is as long as the skull is broad over the 
prefrontals. In Mccaigi the premaxillary is more than twice as long as 
the breadth of the skull over the prefrontals. Comparison with Murray i 
and vertical |j| was quite impossible. The few measurements which are 
known of these skulls could not be compared with measurements in 
Theileri , and no specific peculiarities have been made known. 
Measurements : 1, 63 ? mm. ; 3 , 65 mm. ; 4 , 44 mm. ; 5, 22 mm. ; 
6, 66 mm. 
Lystrosaurus Wagneri, n. sp. 
The specimen has suffered slightly from vertical pressure, and as a 
result the regions between the eyes and the nostrils and the squamosa 
are broken. Wagneri is relatively much narrower between the upper 
hinder corners of the orbital rims than latirostris , declivis , Alfredi, depressus, 
Breyeri , Jeppei, Putterilli, and Theileri. The snout of Wagneri is 
relatively much broader than that of latirostris, declivis , Alfredi, hoops, 
and Breyeri. The premaxillary cf Murrayi and hoops is relatively much 
longer and that of verticalis much shorter than in Wagneri. Frontosus 
is much broader and Jorisseni and Theileri are narrower over the pre- 
frontals. Wagneri is much narrower over the parietals than platyceps, 
Putterilli, Jorisseni, Jeppei, and Theileri. It is broader than Andersoni 
and Mccaigi between the upper hinder corners of the orbital rims. 
Measurements : 1, 67 mm. ; 2 , 34 mm. ; 3 , 71 mm. ; 4 , 42 mm. ; 
5, 17 mm. ; 6, 80 mm. 
Lystrosaurus Wageri, n. sp. 
A small skull which has suffered much from vertical pressure. In 
the uncrushed specimen the parietal region should be broader and the 
frontal region narrower. Wageri is relatively much broader over the 
parietals than latirostris, declivis, Alfredi, depressus, Murrayi, hoops, 
Putterilli, Breyeri, Jeppei, Theileri, and Wagneri. The nostrils of Wageri 
are much nearer to the oral edge than those of verticalis. The premaxillary 
of Murrayi is relatively much longer than that of Wagen. Frontosus 
is much broader over the prefrontals. The preparietal of Wageri is long 
and sharp-pointed in front, whereas that of platyceps is very broad in front. 
The snout of Wageri is relatively broader than that of Andersoni. Wageri 
is relatively broader than Mccaigi between the upper hinder corners of 
the orbital rims and narrower than Jeppei. It is also relatively r broader 
than Putterilli and Jorisseni over the prefrontals. 
Measurements : 1, 37 mm. ; 2, 15 mm. ; 3 , 45 mm. ; 4 , 27 mm. ; 
5 , 18 mm. , 6, 49 mm. 
