436 Dr. 0. W. Andrews — Fauna of Wadi-I^afrun, Egypt. 



the floor of tlie olecranon fossa seems to be of little importance, and 

 may be the result of accident. The form of the condylus internus 

 is like that of the Indian species. The width of the distal end 

 of this specimen is 97 mm. ; the width of the lower end of the 

 shaft is 40 mm. The proximal end of the conjoined radius and 

 ulna and the distal end of the ulna and part of the radius likewise 

 differ from the corresponding parts in H. sivalensis in little besides 

 their somewhat smaller size. 



Distal half of humerus of Hippopotamus hipponensis, Gaudry. 

 \ nat. size. 



The femur (see Studer, op. ciL, p. 75) differs from other Hippo- 

 potamus femora with which it has been compared in having a shorter 

 neck, so that the rounded head is less pedunculate than is usual 

 in the genus. This bone seems to have belonged to a larger 

 individual than most of the others. 



There are two calcanea in the collection which, though worn and 

 broken, are certainly those of a Hippopotamus. One of these 

 specimens is much larger than the other, and, like the femur above 

 mentioned, may indicate either that the range of individual variation 

 in size was very considerable or that there was a second species ; 

 the second alternative seems the less probable ; the length of the 

 larger is approximately 16-5 mm. A phalangeal bone is rather more 

 slender than in other species of Hippopotamus. Its length is 60 mm., 

 the width of its proximal end is 34 mm., the height of ditto 25 mm. 



Sus, sp. (PI. XXI, Fig. 6.) 



The third lower molar of a small pig seems to be the only 



fragment of that animal found in the collection. The form of this 



specimen, which belongs to the right side, is shown natural size 



in Fig. 6. It will be seen that it is a simple type of tooth with 



