RODENTIA. 



Fig. 248. 



vS : ' i i (K F 









* 



5o?zes q/" ;7<e cranium. The bones of the mina are united into one, in front of which 

 cranium in the Rodentia present several pecu- the sphenoid forms a single vertical lamella, 



/. 249. 



Fig. 251. 



Spalax tyjj/Uus. 



Skull of the Hare. 



liarities in their arrangement, which it will be an evident approximation to what is found in 

 necessary to notice. birds. 



Fig. 250. 





Uat/t lergus M arit im us. 



In the hare*, the anterior sphenoid is very The os frontis presents a strong supra- 

 remarkable, inasmuch as the two optic fora- orbital crest, which is deeply notched both 

 * Cuvier, Anatomie compare'e, last edition. before and behind. It advances on e;ich side 



VOL. IV. B B 



