PROFESSOR OWEN ON THE AYE-AYE. lOi 



Fig. 4. Brain, side view. 



Fig. 5. Brain, with prosencephalic or ' lateral ' ventricle exposed. 



A, cerebrum; b, cerebellum ; c, rhinencephalon ; a, longitudinal convolution ; 

 6, suprasylvian convolution ; c, sylvian convolution ; m, upper vermiform 

 lobe of cerebellum ; n, lateral lobe ; q, appendicle ; o, 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. 



Fig. 1. Superficial-seated muscles of the hind Hmb, outer and plantar view. 

 Fig. 2. Deeper-seated muscles of the hind limb, inner and plantar view. 

 Fig. 3. Deeper-seated muscles of the hind limb; outer and I'otular view, or on the 

 ' dorsum ' of the foot : half the natural size. 



(The numerals are explained in the text.) 



PLATE XXVL 



Fig. 1 . The stomach, duodenum, and spleen. 



Fig. 2. The CEecum, with the termination of the ileum and commencement of the colon. 

 (These parts of the male Aye-aye are of the natural size.) 



