32 Two mesencephalic root cells taken from the level of the trochlear nucleus. 

 They are identical with the locus cceruleus cells and differ from the semilunar 

 ganglion cells only by the absence of a coiled process, but are not comparable 

 in any way to the larger trigeminal multipolar motor cells (figs. 33e and 35). 

 X 66.4. 



33 (c) and (d) Two types of cells found in the inferior colliculus a little median 

 to the mesencephalic root fibers. The multipolar type of cell is very rare, (e) 

 One of the large trigeminal multipolar motor root cells. X 66.4. 



34 Tw'o descending mesencephalic root fibers passing around the trigeminal 

 motor nucleus. From one a collateral is given off to pass toward the trigeminal 

 motor nucleus. X 66.4. 



35 Large trigeminalmultipolar motor root cell showing dendrites and axone. 

 X 66.4. 



216 



