PLATE 44. 



RAIIDAE and DASYBATIDAE. 



Fig. 1-3. Raiascabrata (Page 340). Fig. 4-6. Raiastabuliforis (Page 341). Fig. 7. D.\.sy- 

 BATUS marinus (Page 382). 



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



2. Brain from the side. 



3. Brain from below. 



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



5. Ear from the side. 



6. Brain from below. 



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



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

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



