134 MAMMALIA. 



branches from the hard portion of the seventh, and terminate on the muscles and 

 skin of the upper lip and the exterior of the nose, whilst a few pass to the interior 

 of this organ. In the pig, some filaments of the hard portion communicate with 

 several branches of this trunk, just before they terminate on the upper lip and snout. 

 In the porpoise the second trunk is large ; it sends off a branch corresponding with 

 the malar, to pass on the outer side of the orbit to the skin of the lower eye-lid ; it 

 sends a branch in a groove to the palate, and a large branch somewhat analogous to 

 the supra-orbital and superior nasal, to give a branch to a levator muscle of the 

 parietes of the blowing hole, which is also supplied by the hard portion ; the rest of 

 the trunk corresponds with the infra-orbital, it passes forwards and sends branches to 

 the skin of the snout and upper lip. 



The branches of the third trunk of the fifth differ very little from these in man, 

 except that they are larger or smaller according to the varying size of the parts 

 furnished by them. The nerve given to the circumflex muscle of the palate is 

 generally very slender. The deep temporal, supplying the temporal and masseter 

 muscles, is large in proportion to the branches sent to the pterygoid muscles in the 

 jaguar. There is some difficulty in making comparisons relating to the size of the 

 nerves of different animals, as they are composed of finer and closer fibrils in carni- 

 vorous animals than in herbivorous, and have not an equal bulk in proportion to the 

 same extent of parts receiving them. 



The superficial temporal nerve in the calf passes behind the ramus of the jaw ; it 

 sends a large branch forward to join the middle branch of the hard portion of the 

 seventh ; it sends a large auricular branch backwards, one part of which passes to the 

 inner surface of the concha of the ear ; the other communicates with a branch of the 

 hard portion passing to the muscles of the external ear, and then terminates on the 

 skin near the margin of the concha. The branch of this nerve passing to the face is 

 large in the horse and less in the calf; it becomes united with a large branch of the 

 hard portion in the face of both these animals, but with a mere filament in the sheep ; 

 the auricular branch varies very much with the size of the external ear. In the calf, 

 the trunk, before dividing into the gustatory and inferior dental nerves, gives a 



