(iiuotioKv: xoTi/Ah'crrs, an amekican eocknk primate 



S7 



between this process and the tip of the ihuni, and, together with the hganient, it gives a firm sui)port for 

 the iho-psoas, sartorius, deep gluteal and rectus fenioris muscles, which ai'e all used in leaping. (Figs. 

 12, 14, 24.) 



14. 



Muscles of the inner side of the tlii;ili of I'nnnthrciis iliiid, 



After Miln.' IvKvurds. ( oni|)iire Ki-. Ii4. 



Superficial uiuscles 

 n vastus internus 

 i sartorius 

 g psoas magnus 

 adductors 



Deep muscles after the removal of Iticeps, scniilc 

 /J rectus femoris teiidnii arisiu<i from the a 

 0 crureus 

 h pectineus 



diiiDsus a 

 hTior inl'i 



gra.Mhs 



coiniiioii fascia of ui 



semitendinosus 



semimembranosus 



'ps and semdeudinosus 



■nihn 



■ius, i^y 



spine 



ulnleus niaxinuis 



The non-expansion of the ischial tuberosities indicates that the Nolhnrctus pelvis is less adapted 

 for sitting upright than is that of the South American monkeys, while the shortness of the ischium in 

 lemurs and Noihanius, and the restriction of the pelvic inlet, indicates that the true peh is is relatively 



