206 JouRNAL oF CoMPARATIVE NEUROLOGY. 
3. _ All of the ‘‘Halbspindel,”’ as well as a part of central 
spindle, are derived from the nucleolar substance, the central 
spindle containing the linin in great abundance. 
4. The nucleolus is composed of acidophile particles sur- 
rounded by the linin, as brought out by HeRMANn’s method. 
VITT. Illustrations. 
The following are freehand drawings, using oil immersion lens 
(Obj. L. 16 X Ocular, B& L. 1). The sizes of the cell-bodies as well 
as those of the nuclei were given in the text. 
PLATE XVIII. 
Figs. r-r0. Germinal cells in the prophase. Cerebellar cortex of foetal 
cats; RIPART et PETIT; HERMANN’S, Figs. 3 and 9; GILSON’s fluid; HERMANN’S. 
Figs. 77-15. Germinal cells in the metaphase. Cerebellar cortex of foetal _ 
cats; RIPART et PETIT; HERMANN’S Fig. 14; GILson’s fluid; HERMANN’S. 
Figs. 16-78. Germinal cells in the anaphase. Cerebellar cortex of foetal 
cat ; -GILSON’s fluid, HERMANN’S. 
Figs. 19-24. Germinal cells in the telophase. Cerebellar cortex of foetal 
eats. GILSON’s fluid; HERMANN’S. 
Fig. 25. Nucleolus of the spinal ganglion cells of gray rat. The author’s. 
sublimate mixture, toluidin blue and erythrosin. 3.2 micra X 3.2 micra. 
Fig. 26. Nucleolus of the spinal ganglion cell of the adult white rat. 
CARNOY’S fluid; toluidin blue and erythrosin. 3.2 micra 3.2 micra. 
fig. 29. Nucleolus of the efferent neurone of the electric organ of Tor- 
pedo occidentalis. 10% formalin; toluidin blue and erythrosin. 5.7 micra 
x 5-7 micra. 
