816 



MR. G. E. DOBSON ON THE ANATOMY [JuUC 21, 



Fig. 2. 





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,v X^ " 



^ft.1. 



Cercopithecus callitrichus. 

 Adductor muscles and flexores breves vel interossei of right foot, imin. 5- 



a. Adductor hallucis ; a', adductor indicis ; a", adductor aimularis; a"', ad- 

 ductor minimi digiti; i", i'", ?"', {y. plantar iuterossei (second to fifth 

 toes) ; f. p. transversus pedis ; fl. h. tendon of flexor longus hallucis. 



The adductors of the second, fourth, and fifth digits arise together 

 in close connection, partially under cover of the origin of the adduc- 

 tor hallucis ; that for the second digit is much smaller than the 

 others. The plantar flexores breves vel interossei are well developed, 

 a pair for each digit inserted into the sides of the base of each first 

 phalanx ; the innermost of the pair for the middle digit is strength- 

 ened by receiving near its insertion an additional strong muscular 

 fasciculus arising from the scaphoid bone. 



The specimen from which the above notes have been taken, was 

 sent from Barbadoes (into which island it was no doubt imported 

 from the west coast of Africa), and corresponds in all respects to 

 specimens in the British Museum labelled " Cercopithecus sabceus ; " 

 but this name is restricted by Schlegel ' to a closely allied species 

 from Eastern Africa. In the ' Proceedings' of this Society for Jan. 

 1865, pp. 43-46, Mr. Mivart has published • Notes on the Myo- 

 logy of a specimen of Cercopithecus sabceus ;" but my specimen (if 

 belonging to the same species) presents many important diifereuees 

 in its anatomy, which may be briefly exhibited as follows : — 



' Monographie des Singes, 1876, p. 75. 



