40 PROFESSOR OWEN ON THE AYE-AYE. 
head with the fore limbs of the natural size in Pl. XVIII." I may, however, give the 
following dimensions :— 
Ft. in. lin. 
Total length from the muzzle in a straight line to the end of the tail . 3 0 0 
Total length from the muzzle in a straight line to the root of the tail . 1 3 6 
The tail to the end of the terminal hairs is thus rather longer than the body 
The length of the head 0. 456 
Its breadth between the ears OQ iF, 
below the ears 0 4 0 
—across the zygomata . 0 210 
— across the base of the muzzle ‘ Onli: 
— across the eyes, from one outer canthus to che areas 0 2 2 
Interspace of eyes, from one inner canthus to the other. Ojalbeeel 
Breadth of nose external to the nostrils . 0, wi gO 
From the internal canthus to the end of the nose . On din 
Length of the ear Onisipet 
Breadth of the ear . 0) 2 42 
Length of fore limb, from the head af the yeu Oy eS 
of hind limb, from the head of the femur . OMS 0 
— of antibrachium . Oy 20 
——— of fore foot . 0 410 
— of theleg . ; 0775, 40 
— of the hind foot . Oijn4ei6 
—— of digits of fore foot :— 
pollex (z.) . 2 
index (z1.) . 11 
medius (z7Z.) . 
annularis (77.) 
minimus (/.) ’ 
Length of digits of hind foot :— 
J 1S) =P SJ >) 
NS OO Ne 
— 
o 
hallux (i.) 04-1 a6 
second (ii.) . Onl AG 
third (iii.) OF ee 
fourth (iv.) 0 1 93 
fifth (v.) 018 
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 Pl. XIV. 
