56 PROCEEDINGS OF THE ACADEMY OF [1879. 



separately as the seansorius. The rotators of the thigh were 

 present. The adductors are five in number. The semimem- 

 branosus and semitendinosus, as in the Gorilla, hardly deserve 

 names characteristic of their homolognes in Man, as they are quite 

 muscular. The gracilis is very large. The sartorius, however, 

 rather slender. There was a well developed popliteus, but no plan- 

 taris muscle. The soleus arose by the fibular head only. As re- 

 gards the anterior aspect of the leg, the tibialis anticus splits into 

 two tendons, the extensor longus digitorum was present, but the 

 so-called peronens tertius was absent. The extensor longus hallucis 

 and extensor brevis digitorum were well developed, as also the 

 peroneus longus and brevis on the fibular side of the leg. The 

 flexor accessorius was absent. The flexor brevis digitorum supplied 

 the second and third toes only, the tendinous slips for the fourth 

 and fifth came from the flexor longus digitorum ; whereas in the 

 Gorilla the slip for the fifth came from the flexor longus hallucis. 

 In the Chimpanzee the slip for the fifth toe is vei-y delicate, and, like 

 that of the Gorilla, is not perforated. There is quite an intimate 

 union between the fibres of the flexor longus hallucis and digitorum. 

 The special muscles of the minimi digiti and hallux are well devel- 

 oped, and in addition to the ordinary flexor brevis hallucis I noticed 

 a delicate muscular slip arising from the calcaneum in common with 

 the flexor brevis, which was inserted into the phalanx of the hal- 

 lucis. Its action was to flex the hallux. This little slip was also 

 seen in the other foot. So far as I know it has not been described 

 before in the Chimpanzee. There was no transversus pedis. The 

 little slip, called by Prof. Huxley the abductor ossi metacarpi 

 quinti digiti, I noticed in the left foot. There was nothing re- 

 markable about the bloodvessels of the lower extremity, except 

 that the saphenous vein did not pass into the femoral through the 

 saphenous opening, which was well developed in the Gorilla, and 

 the anterior tibial artery was very small, its place being supplied 

 by a large vessel coming from the femoral at about the position of 

 the anastomotic^ magna in the human being. I ventured to call 

 this vessel in the Gorilla the "long saphenous artery," as it ac- 

 companied the artery and nerve of the same name to the foot in 

 that animal. The nerves did not differ essentially from those of 

 man. 



Alimentary Canal and Appendages. The tongue in the Chim- 

 panzee is thicker than in man. I found the circumvallate papillae 



