BRANCHES OF GANGLION CERVICALE SUPERIUS 379 
TABLE 7 
Branches to the external carotid artery 
DIAMETERS OF MYELINATED FIBERS 
E ARBA NUMBER OF FIBERS PER 
CAT IN SQUARE FIBERS SQUARE 
MILLIMETERS MILLIMETER 
1.5to3.3yu 3.3 to4.5u 4.5 plus 
per cent per cent per cent 
Ill 0.0207 168 5656 83 13.5 3.5 
V 0.0442 © 56 1273 91 6.5 2.5 
VII 0.0296 . SF 2949 85.5 1495 oh 
VIII 0015 | 21 1433 100 
Bx 0.0224 111 4937 88.5 11.5 
x 0.0153 298 19428 87 10 3 
and the number of fibers is the sum of their fibers. The table 
shows that in relative number and size of their myelinated fiber 
content these branches do not differ from the others already 
studied. Here again we see the now familiar variation in the 
number of fibers per square millimeter. Very few fibers exceed 
4.5u in diameter. 
BRANCHES TO THE INTERNAL CAROTID ARTERY (N. CAROTICUS 
INTERNUS) 
From the upper end of the ganglion spring some four or five 
large branches which are continued directly upward and enter 
the skull with the internal carotid artery. These taken together 
constitute what is known as the internal carotid nerve. There 
does not seem to be any constant number or arrangement of 
these bundles and we were unable to verify the scheme of con- 
struction outlined by “Langley (04). We have never found 
more than five branches. 
In each cat the areas of all the bundles belonging to this nerve 
were added together and the sum givenin table 8. Inthe same 
way the number of myelinated fibers given there is the sum of 
that found in the individual bundles. The table shows that the 
number of myelinated fibers is both absolutely and relatively 
higher in this than in the other nerves studied. The lowest ratio 
found was 9,934 per square millimeter and the highest 17,774. 
While high ratios were found in individual specimens of other 
