PROFESSOR OWEN ON THE AYE-AYE. 55 
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Length of dorsal 
of lumbar 
of sternum 
of scapula 
of clavicle 
of humerus . 
of radius 
of ulna 
Swwnownask 
of manus aes on es 
of pollex (including metacarpal) 
of index (including metacarpal) 
of medius (including metacarpal) . 
of annularis (including metacarpal) 
of minimus (including metacarpal) 
of pelvis . 
of femur 
of tibia 
of pes 2 oleh Fey oon asta. Semel 
of hallux (metatarsal included) 
of fourth medius (metatarsal included) 
—_ 
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§ 4. Teeth. 
The dental formula of Chiromys is— . 
i, 0.8, pit, m= 18. 
The incisors (PI. XX. figs. 6 &8, 7, 7) are long, large, much compressed, regularly curved 
in segments of equal circles, the upper pair describing one-fourth, the lower pair one- 
half of such circle. The upper incisor (7b. i), 1 inch 4 lines long, following the convex 
border, is 34 lines from before backward, and one line across (7b. fig. 4) ; the outer side 
is flat, the inner side rather convex ; the worn cutting surface is concave, with the fore 
part produced, forming an obtuse point. The front or convex border of the tooth is 
coated by enamel, extending nearly a line’s breadth upon the outer side (fig. 8, e), and 
for a rather less extent upon the inner side: it is one-third of a line in thickness. The 
dentinal body of the tooth (ib. d) has a central slightly discoloured axis of osteodentine. 
The exposed part of the tooth measures six lines at the fore, and two lines at the back, 
border in length ; the implanted part (fig. 8) extends through the premaxillary into the 
maxillary to above the molars, where the pulp is situated close to the thin convex plate 
of bone below the orbit. The pulp-cavity of the tooth is a long cone with a widely 
open base ; the apex reaches to near the opening of the socket. As they approach this 
outlet, the teeth converge and come into contact at the anterior half of their cutting 
