274 E. VICTOR SMITH 



ber of bipolar cells were observed having the characteristic large 

 and small processes. 



d. Gasserian ganglion of the mallard. This ganglion resembles 

 in shape and in arrangement of cells the Gasserian ganglion of 

 the common domestic duck, but the cells are much smaller and 

 more uniform in size. One of the largest cells measured only 

 26 by 38 fx. Lobulated cells, varying from surface rugosities 

 to distinct lobes, predominate in this ganglion. The nuclei are 

 smaller and a larger percentage of them are rounded. Many of 

 the cells are vacuolated, the vacuoles being usually small and 

 situated near the periphery of the cell. 



A large number of the processes formed arcs of greater or 

 less degree about the cell, or followed a meandering course. 

 Few initial glomeruli were observed, but a number of the processes 

 issue from implantation cones. 



E. SENSORY GANGLIA OF THE TURKEY 



1. Cerebral ganglia 



Observations on the sensory ganglia of the turkey were limited 

 to those of the cerebral region. 



a. Ganglion of the ninth nerve. In the turkey this ganglion 

 is relatively small, its length being a little over 1 mm. and its 

 breadth less than 0.5 mm. A careful count of a section through 

 the widest part of the ganglion showed the presence of 134 cells. 

 The cells are scattered throughout the ganglion without orderly 

 arrangement. 



The prevailing form of cell is elliptical, but rounded and irregu- 

 lar forms are not uncommon. The cells varied in major diame- 

 ters between 26 and 52 ^u, and in minor diameters between 15 and 

 33 M- All processes observed emerged from the cells without 

 twists or initial glomeruli. 



b. The vagus ganglion. This ganglion is rather small in the 

 turkey as compared with the same ganglion in the goose or duck. 

 The cells are distributed, largely, in rows parallel to the long 

 axis of the ganglion ; they are more numerous at the distal end than 

 in any other part of the ganglion. 



