‘WILLARD: CRANIAL NERVES OF ANOLIS CAROLINENSIS. 99 
end organs, or peripheral terminations, through the following nerve 
trunks; Somatic sensory (yellow), via nerve V, over ophthalmic 
(rmm. frontalis and nasalis), maxillary and manbibularrami. Somatic 
motor (light blue), via nerves III, IV, VI, and XII. Vscero-sensory 
(red), via nerve VII over the palatine ramus and the chorda tympani; 
via nerve IX over the pharyngeal ramus and probably Jacobson’s 
anastomosis; via nerve X over the superior laryngeal and recurrent 
rami. Vuiscero-motor (dark blue), via nerve V by a number of inde- 
pendent rami and over the mandibular ramus; via nerve VII over 
hyomandibular divisign and ramus hyoideus; via nerve IX over the 
pharyngeal ramus; and via nerve X over the superior laryngeal ramus. 
(a) This shows a greater reduction of the somatic sensory (as 
indicated by peripheral paths) in Anolis than is found in the described 
forms of other groups, such components not being found in nerves IX 
or X of Anolis although their presence in the same nerves has been 
reported in each of the other classes of vertebrates. 
(b) Vestigial ganglia exist in a variable manner on the intra- 
cranial roots of X, which may be somatic sensory in their origin. 
5. The morphological character of the fibers of different com- 
ponents is sufficiently differentiated to form types peculiar to each 
component. But the distinction in character appeared to be less than 
that described for the lower groups of vertebrates. However, there 
was considerable individual variation in the size of fibers. Nerve 
XII shows a marked difference in the size of the fibers going to 
neck muscles and those going to tongue muscles. In this case the 
smaller fibers have much the longer course. In at least three instances 
striated muscle fibers of visceral origin are innervated by nerve fibers 
of smaller caliber and lighter myelin sheaths than is characteristic of 
the other viscero-motor components of V, VII, IX, and X. These 
are the ciliary muscle, the protrusor oculi, and the constrictor of the 
jugular vein, all of which are more closely associated with visceral 
functions than the other striated visceral muscles. 
6. The skin is well-supplied with special tactile organs, which are 
more abundant along the jaws than elsewhere. These organs are 
quite generally, if not always, covered by a thinned plate of the horny 
layer of the epidermis, which bears in its center a tapering “hair.” 
The innervation of these hairs was not determined beyond the fact 
of the proximity of the strongly myelinated cutaneous fibers in the 
dermis beneath. 
7. The distribution of taste buds is such as to preclude their 
innervation (save a very limited number in the laryngeal region) by 
