n 



PLATE 44. 



RAIIDAE and DASYBATIDAE. 



Fig. 1-3. Raiascabrata (Page 340). Fig.4-G. Raiastabuliforis (Page 341). Fig. 7. Dast- 

 BATUs MARiNUS (Page 382). 



1. Brain from above. M. C Z. 1289. V 



2. Brain from the side. i 



3. Brain from below. 



4. Brain from above. M. C. Z. 1294. 



5. Ear from the side. r, 



6. Brain from below. m 



7. Brain from above. M. C. Z. 1287. 



The comparative amount of the brain is much the same in these families but the higher rank of the; 

 Dasybatidae is plainly indicated in the greater complexity of the hind brain. 



