92 OEIGmAL AETICLES. 



liead from tlie calcaneum, and supplied the index only, being a 

 Flexor proprius of that digit. The portion of this muscle going to 

 the little toe in ui?.n is not unfrequently wanting, and its absence 

 is compensated by either a branch from the Jblexor communis, or by 

 a muscle resembling a lumiricalis,* just as in the Magot. 



The Abductor Mminii Digiti arose from the calcaneum, and 

 formed a strong tendon inserted into the proximal end of the first 

 phalanx of the fifth digit. In the Magot this muscle was inserted 

 into the proximal end of the fifth metatarsal bone, its oflice being 

 usurped by the strongly developed Peronceus tertius ; in the Cebus, 

 however, in Avhich the Perojiasus tertius is developed, this muscle was 

 of considerable size, and was inserted in the visual manner. 



The Flexor accessorius arose by a single fleshy head from the under 

 surface of the calcaneum, and broke up into a broad tendinous ex- 

 pansion, which was inserted into the tendon of the Flexor communis 

 which supplied the little finger, and into a very fine tendon which 

 accompanied the tendon of the Flexor communis, and after giving 

 passage to it by a slit, was inserted into the second phalanx of the 

 fifth digit, thus usurping the office of the Flexor brevis, and acting 

 instead of the LumbricuUs described in the Magot. In the Cebus 

 and Magot the Flexor accessorius clutched on to the tendon of the 

 Flexor communis as in man. 



The Flexor Brevis Hallucis arose from the internal cuneiform 

 bone and the plantar fascia, and possessed two small bellies, the ex- 

 ternal of which was inserted into the first phalanx, the internal into 

 the metatarsal of the haUux. In the Magot the inner belly formed a 

 separate muscle, very much resembling an interosseous muscle ; it 

 arose from the external cuneiform bone and was inserted into the 

 sesamoid bone of the fibular side of the hallux. 



The Adductor Hallucis was very large, and divisible into two 

 muscles. (Vide Cuvier, 1. c, PI. 16, where he considers the Flexor 

 Brevis as a third adductor.) Beneath what Cuvier terms the Adducteur 

 oblique, which I have described as the Flexor brevis, a strong fleshy 

 muscle is found, arising from the anterior border of the peroneal 

 sheath, from the head of the metatarsals of the third digit, and 

 from the upper part of a strong band of ligament, which stretched 

 across from the head of the third digit to be inserted into the distal 

 end of the metatarsal and proximal end of the first phalanx of the 

 second digit. This portion is called by Cuvier Adducteur opi^osant 

 des quatrieme et cinquieme doigts. Arising from the lower portion of 

 the ligament just described is a thinner muscular layer, inserted over 

 nearly the whole length of the metatarsal bone of the hallux : this is 

 described by Cuvier as the Adducteur transverse. 



In the Magot the Adductor was very powerful, especially the 

 upper portion, which arose as in the Orang, but gave off" a slip to the 

 metatarsal of the hallux. The inferior portion was also strong, though 



• Enc. Anat Tom. iii. p. 439. 



