willard: cranial nerves of anolis carolinensis. 61 



its fibers are inextricably mingled with those of XII, which they closely 

 resemble. The difficulties of plotting the mixed rami are here further 

 increased by the retraction of the tongue muscles, which throws the 

 terminal rami into numerous coils. The plotting (Plate 3, fig. 5) 

 attempts to trace the lingualis and XII only so far as to show the 

 union of the entire lingualis by two branches with branches of XII. 

 This takes place after the lingualis has been traced cephalad for some 

 distance parallel with the chorda tympani and then back again parallel 

 with XII close to the mucous membrane at the base of the groove 

 which bounds the tongue laterally (Plate 4, figs. 10, 11). Numerous 

 dissections were made in this region, which added little information as 

 to the exact form of the anastomoses. The fact was established, 

 however, that, after joining XII, some of the fibers of V continue 

 caudad presumably to reach the periphery through more proximal 

 branches. 



Terminal distribution of the ramus aheolaris inferior. The final 

 distribution of the sensory components, left in the alveolar branch 

 after the separation of the chorda tympani, the lingualis, and a large 

 cutaneous branch, is accomplished through a series of terminal rami, 

 which make their exit from the alveolar canal through a number of 

 foramina on the lateral side of the dentary bone (Plates 2, 3, figs. 

 5, 6, lab. if. alv.). These are termed by Watkinson (:06, p. 462) 

 the "rami ad glandulae labiales inferiores," the emphasis thus being 

 placed upon their distribution to glands. They probably carry 

 sympathetic fibers to the glands, but if so, these are non-meduUated 

 and are not distinguishable in sections. A conspicuous feature in 

 Anolis is the highly sensitive nature of the lips, as is indicated by the 

 rich supply of typical cutaneous sensory fibers to the skin in this 

 region. The epidermal sense organs are also more numerous here 

 than elsewhere. The strongly medullated sensory fibers are strictly 

 limited to the epidermis at the sides of the lips lateral to the external 

 labial gland (Plate 4, figs. 8-10). The external glands are not very 

 largely developed here, although they occur along the entire length of 

 the lips both upper and lower. 



The n. alveolaris does not emerge as a whole from the alveolar canal 

 until the end of the mandible is reached. Here it comes out as four 

 or five terminal branches, giving to this region an even richer nerve 

 supply than was accorded the lips along the lateral part. 



Innervation of the teeth. The teeth are of the typical pleurodont 

 type, being fused directly with the median side of the dentary bone. 

 The pulp cavity of each tooth is in commimication with the cavity 



