LINGUAL NERVE OF THE DOG PE 
No pronounced changes in the taste buds from the operated 
side could be detected after twenty-four hours, nor even after 
three days, except perhaps in the latter case there might be a 
diminution in size of the taste bud, as if the cells were not so 
well filled out as normally. In one dog which was killed the 
eighth day after operation there were found eighteen fungiform 
papillae without a taste bud and with no particular arrangement 
of the epithelial cells to even suggest where taste buds had 
been; three papillae each with the remains of one taste bud, as 
in figure 4; and two papillae each with one perfect taste bud, 
and one of them having also the remains of a second. On the 
unoperated side ten fungiform papillae were examined. Each 
of them had two to five taste buds in perfect order, with an 
average of three to a papilla. When these were compared with 
taste buds from the tongues of normal (unoperated) dogs no 
differences could be detected. Forty fungiform papillae from 
unoperated dogs were examined, and with one possible excep- 
tion none contained less than two taste buds, and there was an 
average of four to each. This possible exception was a very 
small papilla resembling a filiform papilla in the thickness of its 
cornified layer, but in its shape a fungiform papilla. This par- 
ticular papilla was the only one of the forty which possessed no 
taste buds. 
In one very large dog the following record was obtained fifteen 
days after operation. On the operated side there were six fungi- 
form papillae without sign of a taste bud; three with the arrange- 
ment of epithelial cells showing the former position of taste buds, 
and two having the remains of one taste bud and also a single 
perfect one in each. On the unoperated side five papillae were 
examined. Hach had taste buds in perfect order with an aver- 
age of five to a papilla. Two other dogs gave similar results. 
To test whether the disappearance of the taste buds was due 
to the injury incident on the operation, one dog was treated 
exactly as the others, 1.e., the lingual nerve was disclosed, etc., 
but the branch to the submaxillary gland was cut between the 
lingual nerve and the salivary gland, and the lingual left intact. 
Kleven days after the operation, seven fungiform papillae from 
THE JOURNAL OF COMPARATIVE NEUROLOGY, VOL. 33, NO. 2 
