472 Grace B. Watkinson, The Cranial Nerves of Varanus bivittatus. 
Deseription of Plates XT-AII, 
Fig. I. Brain, lateral aspeet, showing roots of eranial nerves I—XII. 
Fig. II. Brain, dorsal aspeet, showings nerves I, IV, V, and VII—XII. 
Fig. III. Brain, ventral aspect, showing optie chiasma and roots of nerves 
I—XI. 
Fig. IV. Skull, lateral aspect. 
Fig. V. Skull, dorsal aspect. 
Fig. VI Skull, ventral aspect. 
Fig. VII. Bulbi oculi, /. ventral aspeet, showing the innervation of the optie 
musecles (right side, mm.O.L., RI, & R.E. are removed); 2. medial 
aspect of right eye removed from the interorbital septum. 
Figs. VIII—XV. Show by a series, the relations of the eranial nerves to the 
muscles of the head. They are drawn from a lateral aspeet and 
follow the order of layers, from external to internal structures, as 
the disseetion progressed. 
Fig. VIII. View with outer skin removed and the tympanic membrane left 
| Drawings from prepared skull in the museum 
| of the Anatomical Institute in Freiburg. 
in place. 
Fig. IX. mm.cue. and part of cap.mand. turned back. Cer.hy. removed. 
Fig. X. mm.cue., my.hy., genio.hy. & more of cap.mand. removed. 
Fig. XI. Portions of cap.mand. removed; also the hyoid apparatus, the jug. 
and quad. jug. arches. 
Fig. XII. Bulbus oculi removed and a portion of mm.ptery. and ptery.mand. 
eut. away. (Nasal region in this and the following three figures - 
diagrammatic.) 
Fig. XII. on.par.mand. turned back; »n.ptery. and optie musceles as well as 
the entire lower jaw removed. 
Fig. XIV. Quadrate bone and columella removed and m.ptery.internus turned 
back to show V.1. 
The position of brain and roots of eranial nerves in dotted 
outline to show their relation to the surrounding structures. 
Fig. XV. Outline of the skull showing the main nerve trunks and their re- 
lation to it. 
Fig. XVI. Lower jaw and throat, ventral aspect. 'T'he jaws are stretched 
apart after removal from skull, to show all parts of museles, ner- 
ves, ete. Right side mm.my.hy. & gen.hy. are turned back and 
m.hy. is cut away. Left side mm.hy.ir., hy.m. & gen.hy. are turned 
back. 
Fig. XVII. Organs of trunk region showing vagus and sympaticus with their 
branches. 
