PROFESSOR OWEN ON THE AYE-AYE. 101 
Fig. 4. Brain, side view. 
Fig. 5. Brain, with prosencephalic or ‘ lateral’ ventricle exposed. 
A, cerebrum; B, cerebellum; c, rhinencephalon ; a, longitudinal convolution ; 
b, suprasylvian convolution ; ¢, sylvian convolution ; m, upper vermiform 
lobe of cerebellum ; x, lateral lobe ; g, appendicle ; 0, flocculus ; p, pyra- 
midal tracts: n, fig.2, natiform protuberance ; u, crus cerebri ; v, pons Varolii. 
Fig. 6. Palatal ridges and grinding surface of the upper teeth. 
Fig. 7. Tongue, fauces, pharynx, and glottis. 
Fig. 8. Under surface of the tongue, showing the ‘ lytta’ or sublingual plate, a, b. 
Fig. 9. Side view of the tongue and sublingual plate. 
Fig. 10. Longitudinal section of a kidney. 
Fig. 11. Back view of the urinary bladder, muscular and bulbous parts of urethra, and 
accessory genital glands. 
Fig. 12. Transverse section of penis. 
(All the foregoing parts of the male Aye-aye are represented of the natural size.) 
PLATE XXV. 
1. Superficial-seated muscles of the hind limb, outer and plantar view. 
2. Deeper-seated muscles of the hind limb, inner and plantar view. 
ig. 3. Deeper-seated muscles of the hind limb; outer and rotular view, or on. the 
‘dorsum ’ of the foot: half the natural size. 
(The numerals are explained in the text.) 
PLATE XXVI. 
Fig. 1. The stomach, duodenum, and spleen. 
Fig. 2. The cecum, with the termination of the ileum and commencement of the colon. 
(These parts of the male Aye-aye are of the natural size.) 
