OSTEOLOGY 163 



lateralis and a portion of the vastus femoris. The tro- 

 chanteric notch joins the border of the great trochanter 

 to the head, and upon the medial aspect of the trochanter 

 itself is the trochanteric fossa, relatively very deep, into 

 which are inserted both obturator muscles, and upon its 

 proximal border, the pyriformis. There is practically no 

 osteological variation, 



Disto-caudad to the head upon the medial portion of the 

 shaft projects the lesser trochanter. Upon the caudal aspect 

 of this is inserted the quadratus femoris, and craniad, a part 

 of the pectineus, the psoas magnus and the iUacus. The 



TOST, - SUPER. ST WTj 

 SUTtH. &\.UT. FOSSR I j I 



I 



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Fig. 34. Lateral aspect of left innominate of Teonoma, showing osteo- 

 logical details. 



lesser trochanter is a trifle the best developed in Teonoma, 

 but during dissection no subgeneric differences were noted 

 in the muscles concerned. The insertion of the pectineus 

 extends distad to almost the center of the shaft, but this is 

 not indicated osteologically. Medio-caudad upon the 

 shaft, variably at about its center, is sometimes, but not 

 usually, a small roughened area that marks the insertion 

 of the adductor longus. Distad from the head upon the 

 medial shaft is the origin of the vastus mediahs, and just 

 craniad, for practically the entire length of the shaft upon 

 its cranial border, that of the vastus femoris ; but there is no 

 osteological indication of either. 



