willard: cranial nerves of anolis carolinensis. 



41 



one ramus of the mandible to the other, and reaching from the articu- 

 Uire to the anterior fourth of the mandible, thus covering all of the 

 intermandibular space except a small anterior area. From the figure 

 it is seen that the posterior half of the sheet has its origin on the 

 ventral side of the mandible, while the anterior half is inserted on the 

 median face of that bone. ]Many of the fibers from the latter pass 

 underneath those of the cerato-mandibularis, so that there is an 

 interlacing of these two muscles along the inner border of the mandible. 

 The innervation is from the anterior fibers of ramus hyoideus VII and 

 from two or three rami of the mandibular V (myl-hy., Fig. ./.), which 

 leave the*main trunk as mixed nerves (Plate 2, fig. 5; Plate 3, fig. (i, 

 myl-hy. ).%^^ 



j^Versluys ('98, fig. 60-62) figures the m. mylo-hyoideus of Mahuia 

 inulfifasciatajis dovetailing with the cerato-mandibularis, as in Anolis. 



i.md"— 



sphLcoU. 



myl-hy. 



Fig. J. — Camera drawing of the distribution of the motor rami of the facial 

 nerve and the motor rami of the trigeminal nerve that are carried in the 

 ramtis manditaularis. From a preparation made by removing sphincter, 

 digastric, and mylo-hyoideiis muscles from a specimen fixed in vom Rath's 

 soltition; the muscles are retained in their relative positions to one another 

 and mounted for microscopic examination. The nerve fibers are all 

 well blackened as far as the myelin extends. The preparation is viewed 

 from its deeper surface. Three rami from the fifth nerve are shown in this 

 figure, whereas only two appear in the plotting (figures 5 and 6 of Plates 2 

 and 3). Although not demonstrated, it is probable that the two more 

 anterior rami arise from a common branch of the mandibular ramus, which 

 corresponds to the second ramus of the mylo-hyoideus slwjwn in figs. 5 

 and 6, Plates 2 and 3. 



The muscle described as the posterior part of the mylo-hyoideus is 

 designated by Versluys as the m. intermandibularis. This is the part 

 innervated by a branch of VH. 



M. depressor mandibulae (digastric). This (dep. rnd.) is a well- 

 developed, but not a powerful muscle in Anolis. It is broad and fan 



