On the Skeleton of a New Pareiasaurian. 25 



being about 60 mm. thick in the pubic region and thinning down to 

 20 mm. at the posterior end of the ischium. 



FEMUR. 



The left femur is beautifully preserved, and differs little in general 

 appearance from the femur of the S.A.M. specimen of Propappus 

 omocratus. 



The chief measurements are as follows : 



Pareiasuchus Propappus Propappus 

 pi'riiKjiiei/i. omocratus. roye-rsi. 



Length of femur 320 mm. 335mm. 290mm. 



Width of head 54 75 75 ,, 



Length of head 126 ,, 117 ,, 112 



Width of shaft at narrowest part 70 ,, 60 ,, 60 ,, 



Width of distal end of bone ... 152 ,, 137 147 



The chief differences, therefore, lie in the greater stoutness as 

 compared with the femur of Propappus omocratus, and in the 

 narrower, longer, and flatter head compared with both species of 

 Propappus. The concavity between the lesser and greater 

 trochanters is not so deep as in P. omocratus, and the lesser 

 trochanter is less twisted. The face of the bone is of the usual 

 Pareiasaurian type. 



TIBIA. 



The left tibia is present, but it is so deformed by crushing that it 

 is better to give no description of it. 



DERMAL ARMOUR. 



Dermal ossicles occur all along the back, between the proximal 

 parts of the ribs, especially in the neck, and around the pelvis. The 

 scutes are smaller than those of Propappus. 



