Fauna and Stratigraphy of the Stormlerg Series. 385 



to the complete fore-arm ; and doubt is thus thrown upon the identity 

 of the tibia and bones of the hind foot with the forearm, although 

 all are marked with Mr. Walker's collecting number "I". Certainly the 

 supposed femur is no part of the type animal, and must be considered 

 separately. 



The pes described by Broom is admittedly part of another individual; 

 but comparison of it with a few portions of a pes marked "I" and 

 found with the fore-limb renders it probable that it belongs to the 

 same species as the latter. I consider, however, the fore-limb as 

 the type of the species. 



Comparison with M. carinatus is confined to examination of the 

 distal end of the humerus, the 1st. metacarpal, and the proximal end 

 of the tibia. Broom has figured the 1st. metacarpal, displaying its 

 general similarity with that of M. carinatus, the inner distal condyle 

 of each being small compared with forms such as Gryponyx. The 

 distal end of the humerus is somewhat distorted, but the condyles 

 seem to bear a similar relation to one another to those of M. carinatus. 



The tibia approximates more closely in size to that of M. carinatus 

 than does the fore-limb, and probably belongs to a larger individual, 

 possibly the same as that from which the larger humerus (described 

 as femur) belongs. The proximal end of the tibia is slightly longer 

 and considerably thicker in M. carinatus; the greater thickness being 

 mainly due to the more prominent development of the tuberosity on 

 the lateral face. The anterior process is similar in each. The 

 posterior border of the bone is more concave proximally in M. carinatus 

 than in M. harriesi. 



The larger humerus consists of the distal portion from the condyles 

 to the lower end of the deltoid crest. In shape and general pro- 

 portions it corresponds closely with the humerus of the type fore- 

 limb, the distal end being crushed in the same direction as the type. 

 The width of the distal end as preserved is 114 mm. There is a 

 broad shallow groove between the condyles on the posterior face, 

 and a deeper excavation on the anterior face of the bone. Its size 

 corresponds roughly to that of the humerus of M. carinatus. 



The right pes has been fully described and figured by Broom. In 

 size it stands much closer to the fragmentary remains of M. carinatus 

 than does the fore-limb, and is thus of a larger individual which 

 shows few features distinguishing it from M. carinatus. 



Whilst collecting in the Herschel Division of the Cape Province 

 I was fortunate enough to obtain from the hill overlooking the 

 Blikana Trading Store (and thus from an horizon in the upper third 

 of the Red Beds) an almost complete specimen of an animal which 



