SOME CARNIVOROUS THERAPSIDS. 1025 
SESAMODON. 
Another type which has to be brought in connection with 
Bauria is Sesamodon. This type is probably represented in the 
British Museum by the anterior part of a skull broken off through 
the middle of the orbits. Part of the dentition is fairly well 
preserved. The skull, so far as it goes, is of exactly the same size 
and proportions as the type, but differs markedly from Dr. Broom’s 
restored figure in that the lower canine does not bite outside 
the maxilla but inside, in the usual way among Therapsids. As 
Dr. Broom’s type-specimen is extremely weathered and badly 
preserved, it is quite possible that the part of the maxilla outside 
this tooth was removed by weathering. 
In any case, judging only from Dr. Broom’s figures of the type- 
specimen, the animal resembled Lawria in the following ways :— 
Short temporal region. 
The heavy face. 
The general features of the dentition. 
The small squamosal. 
The feeble postorbital arch. 
The frontal forming part of the orbital margin. 
The nasal not widened posteriorly. 
The prefrontal excluding the lachrymal from the nasal. 
The interpterygoid vacuity, and the great distance between 
the posterior ramus of the pterygoid and the paroccipital 
process. 
COON A Tp oo bo 
The group, which may be called the Bauridee, including these 
three reptiles, differs from the Cynognathide (Cynognathus, Dia- 
demodon, and Trirachodon) and the Nythosaurid in the following 
series of characters :— 
1. The short temporal region. 
[2. The heavy face. ] 
3. The nostril directed more forward than outward. 
The nasal not widened posteriorly. 
The frontal forming part of the orbital margin. 
The powerful incisors and grinding “ molars.” 
. The small squamosal. 
8. The large septomaxille on the face. 
9, The interpterygoid vacuity. 
10. The suborbital vacuity. 
11. The great distance between the posterior ramus of the 
pterygoid and the paroccipital process. 
lla. The absence of the long narrow bar formed by the 
pterygoids and parasphenoid behind the region of the 
transpalatine. 
12. The presence of a quadrate ramus of the pterygoid. 
13. The posterior position of the notch in the angular and the 
large size of its reflected lamina. 
14. The lack of an acromion and spine on the scapula. 
15. The large coracoidal elements. 
Proc. Zoou. Soc.—1914, No. LXIX. 69 
(SU) 
