376 P. R. BILLINGSLEY AND S. W. RANSON 
TABLE 4 
Branch to the glossopharyngeal nerve 
bee oe IAT ETON Beach on DIAMETERS OF MYELINATED FIBERS 
MMEERS has atau cr 1.5 to 3.3 3.3 to4.5u 
per cent i per cent 
II ; 0.0033 28 8244.25 93 7 
IW 0.0621 655 10547. 25 98 PE 
VI 0.0086 85 9934.75 94 6 
xX 0.0043 26 6000.5 84.5 15.5 
BRANCH TO THE GLOSSOPHARYNGEAL NERVE 
Although it is probable that a branch to the glossopharyngeal 
nerve is constantly present, it was identified with certainty in 
only a few instances. It comes from about the middle of the 
anterior surface of the ganglion and runs directly upward with the 
branches to the internal carotid and hypoglossal nerve (17). 
It joins the petrous ganglion of the glossopharyngeal nerve. 
This ganglion is hard to locate in the gross specimen, but was 
identified by microscopic examination of that part of the nerve 
with which the branch communicated. 
Table 4 shows that the relative proportion of myelinated 
fibers found in four specimens of this branch was somewhat more 
constant than in the case of the preceding nerves studied. These 
fibers varied from 6,000 to 10,547 per square millimeter, numbers 
which are well within the range of variation found in the other 
nerves. The great majority of these fibers did not exceed 3.3y, 
-and none measured more than 4.5u. 
PHARYNGEAL BRANCHES 
These are so small as to be frequently lost in dissection. The 
commonest arrangement is to find minute branches coming from 
the medial side near the upper pole which run medially over the 
carotid artery to the pharynx (16). They are usually paralleled 
by the pharyngeal branch of the vagus, and a fusion between 
the two may be noted (15). In addition to this there have been 
found minute branches from the plexiform arrangement at the 
