120 



MR. W. OTTLEV ON THE 



[Feb. 4, 



find no trace of it ; but the superior oblique has now moved forward 

 so as to be inserted close behind the superior rectus ; while the in- 

 ferior oblique still remains near the optic nerve, which still enters on 

 the inner side of the fundus, though in Hapale penicillata it is only 

 ■^^ inch nearer to the inner than to the outer border of the cornea. 



Fi-. 8. 



Fig. 9. 



Fig. 8 is a diagram, seen from above, of the attachineuts of the superior oblique 



and superior rectus in Mycetes seniculus. 

 Fig. 9. Ditto in Hapale penicillata.. 



In the Cehidae the rectus and obliquus are inserted almost at right 

 angles with one another (in Cebus the superior obHque is quite 

 at right angles to the superior rectus) ; while in Hapale penicil- 

 lata and Midas rosalia the superior rectus is so oblique as to approach 



Fig. 10. 



A diagram, from above, of the eye of a Lemur ; indicates the relations of the 

 choanoid, superior oblique, and superior rectus. 



the direction of the superior oblique ; in these also the external rectus 

 is very conve.x forwards. 



There is no tapetum in any of the Quadruniana that have been 

 examined. 



