willard: cranial nerves of anolis carolinexsis. 53 



ramus. The frontal ramus lies dorsal to the other and both run 

 cephalad for some distance, passing between the membranous crani- 

 um and the ligamentous origin of the protrusor oculi muscle (Plate 6, 

 fig. 16, /. and na.) . A little farther forward the frontalis turns abruptly 

 dorsad to the posterior angle of the orbit (Plate 5, fig. 15). In this 

 course it keeps next the membranous cranium and attains a position 

 just caudad to the lachr^^nal gland. As it turns dorsally it gives off a 

 branch that becomes involved in the sympathetic plexus (Plate 3, 

 figs. 6, 7), but, like the other branches, this contains cutaneous sen- 

 sory elements that can be traced to the skin. The main branch con- 

 tinues between the brain and the large blood sinus which lies just 

 posterior to the lachrymal gland (Plate 5, fig. 15). A little farther 

 forward, and at a level where the gland is beginning to be cut, there 

 are given off a number of branches, which anastomose with the 

 sympathetic, but for the most part supply the upper lid. These lie 

 just mesad of the lachr;yaual gland (Plate 5, fig. 14, gl. Ich.). The main 

 part continues forward and supplies, from time to time, small rami 

 to the skin between the eyes (Plate 5, figs. 12, 13). '^ 



lb. Ramus nasalis iiia.) . This is the main ophthalmic branch and 

 takes the characteristic course through the orbit (Plates 4, 5, 6, figs. 

 10-17). It passes into the orbit with nerve III and passes dorsally 

 to the optic nerve and over the ocular face of the dorsal rectus mus- 

 cle (Plate 5, fig. 14). Just before its entrance into the orbit (Plates 

 2, 3, figs. 4, 6, rx. cil. V.) it gives off the long root of the cihary nerve 

 (see p. 46). With this exception there are no branches or connec- 

 tions within the orbit. It passes out of the orbit on the median side 

 of the Harderian gland (Plate 3, fig. 7; Plate 4, fig. 11) into the space 

 bounded by the anterior median w4ng of the palatine, the frontal, 

 the prefrontal and the origin of the ventral oblique muscle (Plate 4, 

 fig. 10). Here the nerve passes through the "ethmoidal" sympathe- 

 tic ganglion (gn. eth.), wliich will receive especial description. This 

 ganglion lies on a level with the anterior boundary of the bony orbit, 

 and through it a cutaneous branch of coarse fibers is given off to the 

 skin of the anterior angle of the eyelids (Plate 4, fig. 10, na}). Soon 

 after this the main nerve divides into a lateral branch (Plate 4, fig. 9, na. 

 I.) and a median branch {na. m.). These richly supply the skin of the 

 snout. The median one gives oft' in addition a branch to the mucous 

 membrane of the nose; its cutaneous branch passes forward along 

 the median line to be distributed to the end of the snout (Plate 2, 

 fig. 4). 



According to Watkinson (:06, p. 458), who mentions both the fron- 



