Nervous St/ stem Special. 131 



paradoxus, which, like the duck, uses its beak as a tactile instrument 

 in the detection of its food. 



The infraorbital branch is often of remarkable size, particularly 

 in those animals that are provided with a snout, or with large 

 vibrissas upon the upper lip, to the follicles of which it gives con- 

 siderable branches. 



The third division^ which supplies, from its ganglionic part, 

 the sensitive and secreting surface of the long tongue, is much 

 developed in Echidna. The size of the lingual branch of the 

 trigeminal is still more marked in the Pangolins and Ant-eaters, 

 esp. in Myrmecophaga jubata. 



The denta/ry branch of the Maxillary is large in Rodentia and 

 Froloscidia, to meet the demands of the active and persistent matrix 

 of the Incisors. 



The palatine nerves attain their maximum size in the Balcenida 

 in relation to the active and extensive growth of baleen. 



{d) Hypoglossal or Ninth. 



exit from the skull. 



The main roots of each hypoglossal, which quit the Macromyelon 

 usually in two bundles, escape in many Marsupials by two precon- 

 dyloid foramina. 



size. 



In the Giraffe the motor nerve of the tongue is larger in propor- 

 tion to the body than in the Ox ; it is largest in the Pangolins and 

 Ant-eaters in relation to the great length of the tongue, and frequency 

 iand extent of its muscular motions. 



