Herrick, Cranial Nerves of Amblystoma. 207 



r. br. 1. — Branches from the glossopharyngeal to the muscles of the first branch- 

 ial arch. 

 r. inf. — Branch of oculomotor to m. rectus inferior. 

 r. int. — Branch of oculomotor to m. rectus interior. 

 r. p. c. — Ramus palatinus caudalis. 

 r. s. — Branch of oculomotor to m. rectus superior. 

 s. — Branches of r. hyo-mandibularis for m. submaxillaris. 

 tr. — Trochlear (pathetic) nerve. 

 7, 2, 3, 4. — Rami of the vagus. 

 J, 6, 7. — " " glossopharyngeus. 



1 sp. — First cervical nerve. 



2 sp, — Second " " 



* — Point of union between the fourth nerve and branches of the r. ophthal- 

 micus. 

 The Roman numerals indicate the origins of the several nerves. 

 For convenience of reference, about the same color-scheme has been fol- 

 lowed in the plates as that employed by von Plessen and Rabinovicz. 



Olfactory nerve, ....... blue. 



Optic nerve, ........ green. 



Oculomotor nerve, ....... orange. 



Pathetic nerve, ....... black. 



Trigeminal nerve, ....... red. 



Abducens nerve, ....... black. 



Facial nerve, ........ blue. 



Auditory nerve, ....... yellow. 



Glossopharyngeal nerve, ..... brown. 



Vagus nerve, ....... green. 



First and second spinal nerves, .... black. 



PLATE XIX. 



The cranial nerves of Amblystoma punctatum, as seen from the right side, 

 magnified about twenty diameters. 



PLATE XX. 

 The same as the last, seen from above. 



