. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology; Zoology. willard: cranial nerves of anolis carolinensis. 43 passes through this muscle and is distributed to the ventral skin region. Three branches of spinal nerves are shown to innervate the cucullaris muscle; their precise relation to particular spinal nerves was not determined owing to apparent anastomoses of rami. No relation that would suggest an innervation from a spinal accessory nerve was established with any nerves anterior to spinal II. M. laxator tympani of Versluys (lax. tym.). A very small muscle, less t
. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology; Zoology. willard: cranial nerves of anolis carolinensis. 43 passes through this muscle and is distributed to the ventral skin region. Three branches of spinal nerves are shown to innervate the cucullaris muscle; their precise relation to particular spinal nerves was not determined owing to apparent anastomoses of rami. No relation that would suggest an innervation from a spinal accessory nerve was established with any nerves anterior to spinal II. M. laxator tympani of Versluys (lax. tym.). A very small muscle, less than one half mm. in length, extends caudad from the insertion of the tympanic ligament on the extra-columella (Plate 7, figs. 21, 22). Its fibers end on the connective-tissue covering of the parotic process. The motor component of nerve VII passes ventral to the posterior end of this small bundle and in contact with it. The series of sections did not show with certainty the innervation of this muscle from motor VII, but a few fibers are given off from the main nerve bundle which in all probability accomplish such innervation. This is the more probable because there is no other nerve in the vicinity. Owing to its minute size this muscle was not isolated in dissection, but is a constant feature of the sections. This muscle was first described by Versluys ('98) and given the name descriptive of its function. He found it in a number of lizards, all members of the family Gecko- nidae, while he failed to discover it in as many others, which be- longed to different families. No more positive statement of its in- nervation than is here given for Anolis is contained in Versluys's account. M. constrictor venae jugularis internae of Bruner (co'st. vn. j. i.). In Anolis this muscle is found in Relations similar to those described by Bruner (: 07, p. 42) for Phryno- oma. These striate muscle fibers urround the internal jugular vein or a distance of .84 mm. The ')st anterior fibers, for a di
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