88 OEiaiNAL ARTICLES. 



described ^^^tll the Iliacus and the Invertor femoris may perhaps be 

 owing to the freedom allovred the hip joint by the absence of the 

 ligamentum teres, which the Orang alone of the Quadrumana wants. 

 The Adductor muscles were of coarse textm'e, and split into 

 numerous bundles. In the Magot the Adductor Longiis formed a 

 distinct belly, partly inserted into the tibia (Yid. Cm-ier, 1. c, 



PI. e31-32). 



The Tibialis Anticus was relatively stronger than in man ; it 

 arose from the tuberosity and anterior surface of the tibia, for a space 

 of three inches and a half, and its tendon was split into two portions, 

 the posterior and larger, being inserted into the cimeiform bone, the 

 anterior and smaller, into the base of the metatarsal bone of the 

 hallux. In this instance there was no dirision of the muscle into 

 fascicles, as described in Article Quadrumana in the Cyclopa-dia of 

 Anatomy and Physiology, and in the Proceedings of the Zoological 

 Society, therefore I think there is no reason to consider the anterior 

 division of the tendon as belonging to the Abductor Sallucis Zongus, 

 especially when we observed a similar arrangement in the Abductor 

 PolUcis, and that, in man, a small slip of tendon normally passes on 

 to the metatarsal of the great toe.* 



In the Chimpanzee, Professor Owen states that the tendon is 

 inserted into the scaphoid. In the Cebus the muscular belly is 

 divided into two fascicles, which may be regarded as the Abductor 

 Sallucis Longus and Tibialis Anticus. In the Magot the same 

 arrangement is found. 



The Extensor Froprius Hallucis was remarkably w'eak and slen- 

 der ; it arose from the upper part of the fibula and the interosseous 

 ligament, and was inserted as in man. Cuvier has figiu-ed, 1. c. PL 19, 

 an extensor of the index distinct from the Extensor coimnunis ; it was 

 absent in this instance, and neither Professor Owen nor Duvernoy 

 mention it. 



The Extensor Communis Digit orum resembled man's. The Pero- 

 noBUs Longior arose from the head of the fibida, the outer and back 

 part of that bone and the intermuscular septum, for a space of three 

 inches, and was inserted into the m^etatarsal bone of the hallux, acting 

 as a powerful flexor of that digit. The Peronceus Brevior arose toge- 

 ther with the preceding muscle, and was inserted into the metatarsal 

 bone of the fifth digit ; it was a much more fleshy muscle than the 

 Peronceus Longior, and remained fleshy on the posterior surface almost 

 to the point of its insertion. The Peronceus Tertius was absent. 



In the Magot and Cebus the Peroncei Longior and Brevior re- 

 sembled those of the Orang, only diftering in their greater relative 

 size, but both of them possessed a Peronaeus Tertius, which consisted 

 of a thin muscular layer lying beneath the Peronceus Brevior, and 

 terminating in a very fine tendon, which passed through a slit in the 

 tendon of the Peronceus Brevior on a level with the cuboid bone, and 



• Ellis's Demonstration of Aiiiitom}^, Edit. 5, p 754. 



