HIND-LIMB. 155 



C. 227. Eight hind-limb of Macacus maurus, showing the super- 

 ficial muscles. The climbing habits of the monkey are 

 indicated by the comparative weakness of the extensor 

 cruris, the insertion of the flexors of the knee, especially 

 the gracilis and semitendinosus, far down the shank, and 

 the considerable development of the posterior (femoro- 

 coccygeal) part of the ectogluteal sheet. The following 

 details are of interest in comparison with other Primates: 

 The gluteus maximus is continuous anteriorly with the 

 tensor fasciae latse, but is separated posteriorly by a gap 

 from a large muscle that rises from the tuber ischii and is 

 inserted partly into the fascia covering the lower part of 

 the thigh and partly into the fibula. The anterior portion 

 of this muscle apparently represents the femoro-coccygeus ; 

 the posterior portion, the ischial head of the biceps. There 

 is no femoral head to the biceps. The insertion of the 

 gracilis is continued by a fibrous expansion to the heel. 

 There is a well-marked prse-semimembranosus. The 

 tibialis anticus divides distally into two separate parts 

 inserted respectively by tendon into the internal cuneiform 

 and metatarsal I. The calf muscles are weak. The soleus 

 is fleshy to the heel. 0. C. 64 M I. 



Presented by J. Abrahams, Esq. 

 Haughton, Proc. Roy. Irish Acad., vol. ix. 1867. p. 278. 



C. 228. Superficial muscles of the left thigh of a Baboon (Papio 

 [Cynocephalus\ babuiri). The muscles show in general a 

 high degree of development. Those that form the ectogluteal 

 layer are stronger and far more separate than in Macacus. 

 A prae-semimembranosus is present. The components of 

 the extensor cruris are strong and very definite. The 

 ischial head of the biceps is fused, as in Macaciis, with the 

 femoro-coccygeus ; there is no femoral head. 0. 0. 64 K. 



C. 229. Superficial muscles of the right shank and foot of a 

 Baboon (Papio [ Cynocephalus] babuin). The calf muscles 

 are more powerful than in Macacus, The plantaris is of 

 considerable size, and the soleus independent and fleshy to 

 the heel. The tibialis anticus resembles that of Macacus. 

 0. C. 64 L 



