103 

 der by f-ir th'in the ienlrites; it is diractel away from the 

 limitans intenn, taking the coarse of a s/ieepinfJ curve. 



The nucleus of the cell is evenly roanJed in forn, rather 

 large as to proportionate size, and it has a central location. 

 There is but a single nucleolus. The chromatin is iistribited 

 in a delicate network, the few interlacing strands visible 

 being of great tenuity. 



The cytoplasm is remarkable for the large size of its 

 masses of tigroid substance, these bodies being visible as 

 distinct things even under low amplification. The form of a 

 tigroid is almost invariably triangular. The base of the tri- 

 angle lies toward the nucleus, the apex pointing towari one of 

 the dendrites. Those masses lying in contact with the nuclear 

 membrane are somewhat broader, taking the form of a so-called 

 nuclear cap. The size of mass decreases toward the periphery 

 of the cell, those lying in the bases of the dendrites assu- 

 ming a slender form. Reference may be made to Pig. 59. 



The striking size attained by the masses of tigroid sub- 

 stance here is doubtless associated with the purely motor func- 

 tion of the III nevvB, the fibres of which are the axones of 

 these particular neurones. 



0. The Vuoleus of the Troahlearia. — Hohon ('77) fell into 

 a curious error with regaris the nucleus of the TV nerve. As is 

 well known, the root of the trochlearis passes backward and 

 crosses over to the opposite side, appearing dorsally in the 



