154 - J. B. Johnston 
forward the septum becomes transformed into a dense mass of con- 
nective tissue which differentiates into a V-shaped cartilage whose 
limbs are connected, with the dermis above these muscles, and a 
median mass which extends forward into the buceal funnel and 
bears eleven or more teeth. The pair of muscles extend forward 
through the inner part of the walls of the buccal funnel and are 
inserted into the lateral surface of the olfactory capsule (capsule 
of the olfactory pit and olfactory bulb). It is evident that the 
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median mass is the tongue and the museles in question appear to 
be the copulo-glossus obliquus and reetus of FÜRBRINGER (9). The 
nerve is traced forward in the reetus musele for some distance and 
lost while imbedded in the muscle. This nerve throughout its whole 
length lies either closly applied to or imbedded in muscles and 
nowhere comes near the skin. It gives off no large branches but 
from time to time small twigs into the muscles. At its origin it is 
elearly made up entirely of fibers from the motor root. The distal 
portion of this nerve which runs forward has been wrongly called 
by HATSCHER a cutaneous nerve under the name of mentalis. 
