aid 
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- WILLARD: CRANIAL NERVES OF ANOLIS CAROLINENSIS. an 
is a perfectly distinct muscle, having ‘its origin under cover of m. 
cerato-mandibularis 1 about half way along the jaw, and being in- 
serted near the distal end of the cerato-hyal instead of the cerato- 
branchial (Plates 5, 6, figs. 13-19). No corresponding muscle has 
been found in any of the descriptions of saurians. 
The innervation of the above three muscles is from nerve XII, 
which passes across the deeper surface of the first described portion 
(ker-md.1); two branches are given off here, the anterior of which 
runs cephalad to supply also the anterior muscle (ker-md.*). The 
small bundle (ker-md.*) is innervated by an independent ramus, 
directly from XII. 
M. ceratohyoideus = hyoglossus (hy-gls.). This is a muscle (Plates 
5, 6, figs. 13-19) extending between the first and second horns of the 
hyoid apparatus (i. e., between cerato-hyal and cerato-branchial I). 
The attachment on the latter is more extended than that on the cerato- 
hyal, so that the muscle sheet is much thinned posteriorly, consisting 
of fine bands somewhat separated from one another. The pharyngo- 
laryngeal branch of IX + X (pha-lar.') passes along the superficial 
face of this muscle between it and m. genioglossus. It is innervated 
by motor fibers carried in this branch (Plate 2, fig. 5), which might 
indicate either a visceral origin for the muscle or the presence of 
fibers from XII in the nerve. 
M. omohyoideus (omo-hy.). This (Figs. F-G; Plates 6, 7, figs. 
16-24) has its origin on the shoulder girdle along the clavicle, ex- 
tending to near the median line, and passes forward as a broad sheet 
shghtly converging with its mate to be inserted on the cerato-branchial 
1 along almost its entire length and also on the basihyal. The fibers 
with the latter insertion form a bundle which, through a difference in 
direction, differentiates the superficial part (omo-hy.) from the deeper 
part (omo-hy. prf.), a distinction of slight importance in this form. 
M. sterno-hyoideus (stn-hy.). The removal of m. omohyoideus 
uncovers a muscle (Plate 5, figs. 13-15) which takes its origin from the 
sternum, the muscles of the two sides having a common median origin. 
Che insertion is along the cerato-branchial I, co-extensive with that 
or the omohyoideus, but at a deeper level. At the angle of cerato- 
yranchials I and II (Plate 5, fig. 13) the fibers of the median edge of 
terno-hyoideus turn mesad to be inserted on the base of cerato- 
ranchial II, on both the ventral and dorsal sides. The median edges 
{ these muscles are the thickest and they spread out fan-shaped from 
tedian origin to insertion on the cerato-branchial I. A little of the 
vachea (tr.) is exposed just caudad to the basihyal, as is shown in 
hgure E. 
