1?6 



through it /»ith3ut any orier of arr-ini^efiien t (Pi^.r?l, str.). 

 These neurones are nsvec closely crowiei, there usually being 

 «ide inter\/als betteen the cell-boiies. Their ■dendrites are 

 very lons^, however, so that an interlacing plexus is given 

 throughout the ^hole field. Pig. 34 will illustrate these feat- 

 ures. 



An individaal neurone is sho^a in Pig.3o drawn to a smal- 

 l3r scale than the other neurones of the striatuii because its 

 processes spread so wiJely. The cell-body Tiay be rounded, 

 oval, or polygonal in outline. There are numerous long and 

 slender branching dendrites. Several dendrites often arise 

 from a co-nmon thick stena .Thioh mi^ht almost be considered a 

 part of the cell-body. A dendrite is noteworthy for the many 

 little crooks which appear in its course, and also for the 

 peculiarly spine-like genrimules which beset it. The latter 

 feature is evidently characteristic of these neurones in fish- 

 es, as Van Gehuchten ('94) has noted their presence in the 

 trout, and Johnston ('99a) in the sturgeon. 



The cell-nucleus has its chromatin disposed in slender, 

 branching threads, and in minute granules distributed some- 

 what diffisely (Fig. ^6). The cytoplasm forms a thick invest- 

 ment to the nucleus on all sides. Its tigroid masses are mar- 

 kedly larger than those found in the neurones of the epistri- 

 atum. The largest ones lie in the bases of the dendrites, and 

 these have a triangular form. Other masses of smaller size 

 an3 of more irret^ular shape are intercalated between the lar- 



