On the Angwantibo of Old Calabar. 



185 



inch; and the third about i 2 2 -ths of an inch. Free extremity 

 fths of an inch. 



Span, 1 inch and T 8 oths of an inch. 

 Posterior Limbs : — 



Length of Thigh, 2 \ inches ; of Leg, 2 J inches. 



Foot, from ankle-joint to point of longest finger or toe — the 

 fourth, 1| inch. Tarsus, not elongated, about \ an inch in 

 length. Metatarsal bones measure from r 5 ¥ ths tooths of an 

 inch in length. 



The first phalanges (with the exception of the thumb), like 

 those of the hand, are conjoined together. 



Thumb or First Finger. — Thumb with metatarsal bone, 

 about fths of an inch long. First phalanx, i^ths of an inch ; 

 second, x 4 ¥ ths of an inch. 



Length of Second Finger, 1 inch ; first phalanx, nearly 

 fths of an inch ; second phalanx, /gths of an inch ; third 

 phalanx, bone of claw, r \ths of an inch ; claw itself, X 3 F ths 

 of an inch. Free extremity, \ an inch. 



Length of Third Finger, first phalanx, x Vths of an inch ; 

 second phalanx, x 4 eths of an inch ; third phalanx, x 3 ¥ ths of an 

 inch ; third finger smaller than the fifth, and free about fths 

 of an inch. 



Length of Fourth Finger, first phalanx, fths of an inch ; 

 second phalanx, fths of an inch ; third phalanx, x 3 6-ths of an 

 inch ; fourth finger longest, free about \ an inch. 



Length of Fifth Finger, first phalanx, T % ths of an inch ; 

 second phalanx, f^ths of an inch ; third phalanx, nearly 

 x 3 eths of an inch. Larger than third finger, being inter- 

 mediate between it and the fourth, and free for about fths of 

 an inch. 



Span measures nearly 2 inches in length. 



This animal possesses a clavicle. The stomach is moderate, 

 in size, and rounded in form, and contained what seemed to be 

 digested vegetable matters. It has a large sacculated coecum 

 of about If ths inch in length. 



Microscopic Structure of the Hair of Angwantibo. — 

 It occurred to me to examine through the microscope some of 

 the hairs of this little animal ; and I was much struck by their 



