Herrick, Nerves of Stluroid Fishes. 207 
spinal nerves which JuGE repeats (p. 97) after Srannius, for, 
as I have so often emphasized, a communis nerve cannot be 
homologized with a general cutaneous nerve. 
II. THE GLOSSOPHARYNGEUS NERVE. 
As usual among the teleosts, the motor IX root runs out 
ventrally of the spinal V tract and quite far removed from it. 
The communis root runs out dorsally of the spinal V tract and as 
close to it as possible and in passing it may receive a small gen- 
eral cutaneous component from it, though I have not been able 
to demonstrate such a connection, nor is it mentioned by 
WriGHT or Kinessury. The sensory root and the motor root 
join soon after their emergence from the oblongata and both 
run back together under the root of the r. lateralis vagi, from 
which some fibers are detached to join the IX roots. A short 
distance cephalad of the vagus foramen the IX nerve passes out 
of the cranium by a separate foramen, just within which there 
is a small ganglion, which belongs to the lateralis component. 
The fibers from this ganglion can be clearly followed peripher- 
ally and constitute a ramus supra-temporalis IX, belonging to 
the lateralis component. Upon emergence from the IX fora- 
men, it does not turn cephalad with the remainder of the 
glossopharyngeus, but caudad, then dorsally along the ventral 
surface of the parotic process of the cranium into a canal in the 
squamosal bone, where it divides into two unequal branchlets. 
The larger one supplies the second sense organ of the 
lateral line canal of the trunk within that bone; but the smaller 
one leaves the canal, directed toward the median line along the 
inner face of the squamosal bone nearly to its mesial border. 
Here it passes outward through a minute foramen in the bone 
and divides to innervate the two large pit organs which make 
up the middle pit line (Fig 1, #. 2.) 
Within the squamosal bone the r. supratemporalis IX 
anastomoses with twigs from the r. cutaneus dorsalis vagi and 
the relations are here somewhat confused. I think, however, 
that this nerve contains lateralis fibers only and no others. It 
is comparable with the branches of the IX nerve for canal or- 
