68 Journal of Comparative Neurology. 



" G. Schwalbe. Lehibuch der Neurologie. iS8i. 



'^ C. S. Minot. Human Embryology. 1892. 



i^H. Obersteiner. Central Nervous Organs. 1890. 



"T. Meynert. Psychiatry. 1885. 



'^C. Golgi. Rivista Sperimentale di Freniatria e di Medicina Legale. 1883. 



1^ B. G. Wilder and S. H. Gage. Article, Anatomical terminology. Refer- 

 ence Handbook of the medical sciences. Vol. VHL, 1889. 



^' J. M. Lancisics. Opera Omnia Lib. VH., de sede cogitantis Animae. 

 Genevae. 1718. 



DESCRIPTION OF FIGURES. 



Cal. callosum ; fa/. /. callosal fissure ; /b^ fasciola ; fiin, fimbria; gen. genu • 

 ind. indusium ; ncl. nerve cell layer ; prcs. precommissure ; sept, hemiseptum ; 

 S171. stria mesalis ; spl. splenium. 



Fig. I. Human fetus of five months, after Marchand. 



The outlines of the remaining figures were drawn with the aid of Abbe's 

 camera lucida, using, except for figures 2 and 7, Leitz's No. i ocular and No 2 

 objective. The details are fille<l in free hand and absolute accuracy is not in- 

 tended. 



Fig. 2. A transection through the callosum of man. The specimen was 

 hardened in a ^ per cent, solution of ammonium bichromate in 1^0 per cent, 

 alcohol. Stained with hematoxylin. Enlarged twenty diameters. 



^^S3- Chimpanzee, Troglodytes niger. The brain was hardened by a con- 

 tinuous injection of alcohol through the blood vessels. The section was taken 

 from the region of the genu. Stained in hematoxylin. Enlarged forty diameters. 



Fig. 4.. Macacus cynomolgus. Hardened in alcohol 20 c. c, water 80 c. c, 

 glycerin 8 c. c, zinc chloride 4 grams. Stained in an alcoholic acid solution of 

 carmine, x 40. 



Fig. J. Sheep, Ovis aries. Hardened in a 5 per cent, alchoholic solution 

 of zinc chloride. Stained in hematoxylin and eosin. x 40. From genual region. 



Fig. 6. Cat, Felis domestica. Hardened in potassium bichromate 8 grams, 

 potassium nitrate 4 grams, water 600 c. c. The specimen was transferred from 

 hardening fluid direct to ammonia carmine stain. The section was taken from 

 the splenium. x 40. 



Fig. 7. Pyramidal nerve cell from the indusium of the sheep. Golgi pre- 

 paration. 



