40 PROFESSOR OWEN ON THE AYE-AYE. 



head with the fore limbs of the natural size in PI. XVIII.' I may, however, give the 

 following dimensions : — 



Ft. in. liu. 

 Total length from the muzzle in a straight line to the end of the tail .300 

 Total length from the muzzle in a straight line to the root of the tail .13 6 

 Tlie tail to the end of the terminal hairs is thus rather longer than the body. 



The length of the head 046 



Its breadth between the ears 027 



below the ears 4 



across the zygomata 2 10 



across the base of the muzzle 012 



across the eyes, from one outer canthus to the other ... 2 2 



Interspace of eyes, from one inner canthus to the other Oil 



Breadth of nose external to the nostrils 010 



From the internal canthus to the end of the nose 14 



Length of the ear 034 



Breadth of the ear 2 2 



Length of fore limb, from the head of the humerus 11 5 



of hind limb, from the head of the femur 13 



of antibrachium 040 



of fore foot 4 10 



of the leg 5 



• of the hind foot 046 



of digits of fore foot : — 



poUex (/.) 12 



index (//.) 1 11 



medius (///.) 2 10 



annularis (/r.) 034 



minimus (r.) 021 



Length of digits of hind foot : — 



hallux (i.) 016 



second (ii.) 016 



third (iii.) 19 



fourth (iv.) 19 



fifth (v.) 18 



The Aye-aye resembles in size, and somewhat in shape, a domestic Cat ; but its head, 

 especially with the ears, is larger ; the hind limbs are longer, and the tail is still more so 



" To the illustrations accompanying this paper, when transmitted to the Society in January 1862, is now 

 added the characteristic figure, by Mr. Wolf, of the living female Aye-aye, which has been subsequently 

 received at the Gardens of the Zoological Society. It is reduced to one-half the natural size in PI. XIV. 



