of the Genus Stenomylus. 315 



especially in the iliac region. The upper end of the ilium is 

 widely expanded and has a large area for the attachment on 

 the sacrum. The neck of peduncle is longer and slenderer 

 than usual. In the neighborhood of the acetabulum this bone 

 is marked by several transverse ridges for the attachment of 

 muscles quite as in the modern camels. The ischium is stout 

 and expanded behind, a high slender process with its tuberos- 

 ity rising on the superior ridge, and a second, the ischial 

 tuberosity, being well developed at the posterior angle. The 

 pubis is short and stocky, being expanded along the wide 

 symphysis until it meets the ischium. In general conformity 

 to the elongation of the pelvis the thyroid foramen is oval. 

 The acetabulum is deep with a wide notch below. 



The short femur has a marked curvature,? being generally 

 tylopod in character. Its head is small and rounded, with the 

 pit for the round ligament well to the posterior side. The 

 bridge between the head and the greater trochanter is both 

 short and high, as is common to the camels generally ; and the 

 greater trochanter rises high above it, making a wide notch, as 



Fig. 21. 



Fig. 21a. 



Fig. 21. Stenomylus hitchcocki, femur seen from the inner side, x 1/2. 

 Fig. 21a. Head of femur from the posterior side. 



is also found in Poebrotherium. The bridge is compressed 

 antero-posteriorly, so that the digital fossa makes a deep pit, 

 the bottom of which is about on a level with the lesser trochan- 

 ter. This latter is situated high on the shaft, and from it 

 runs a long ridge for muscular attachments. The rotular 

 trochlea is broad and shallow and does not extend far up on 

 the shaft. The external condyle is larger than the inner, 

 which stands obliquely to the transverse axis of the shaft. 



