1393.] Proceedings of Scientifie Societies. 309 
Significance of percentages in reversions in human anatomy, Professor 
H. F. Osborn, Columbia College, New York. Discussed by Professor 
Cope and Drs. Dwight and Lamb. 7. Series of thirty-five natural- 
size photographs of sections of human brain, with brief remarks, 
Dr. I. S. Haynes, University of New York. 8. Histogenesis in the 
brain, and its bearings on development and decline, Professor C. L. 
Herrick, University of Chicago. Discussed by Drs. Heitzmann and 
Piersol. 9. The metapore or foramen of Magendie, with photographs, 
Professor G. B. Wilder, Cornell University. Read by Mr. Clark. 
10. Neuromerism and the cranial nerves of Ophidia, Professor Herrick, 
11. The insula of the pig, with specimens, Tracy E. Clark, B. S., Clin- 
ton Liberal Institute, Fort Plain, N. Y. Discussed by Drs. Allen, 
Dwight and Spitzka. 12. The posterior surface of the liver ; described 
by Vesalius; Dr. F. H. Gerrish, Bowdoin College, Maine. Discussed 
by Drs. Dwight, Heitzmann and Allen. 13. Embryos of bats, (with 
specimens), Dr. Allen. Discussed by Professors Cope and Minot. 14. 
Meckel’s diverticulum, Dr. D. S. Lamb, Army Medical Museum, Wash- 
ington. Discussed by Drs. Minot and Dwight. 15. Delimitation of 
abdominal regions, Dr. E. A. Balloch, Howard University, Washing- 
ton. Read by the Secretary. 16. The need of agreement in the 
limits of the abdominal regions, Dr. Gerrish. Discussion of the last 
two papers together, by Dwight, Piersol, Kemp, Heitzmann and Lamb. 
17. Physical characters of the Kootenay Indians, Mr. Alex. F. Chamber- 
lain, Clark University, Worcester, Mass. 18. Discovery of an ossified 
thyroid cartilage, and a supposed rudimentary clavicle in an artiodac- 
tyl, with the specimen; Professor W. B. Scott, Princton, N. J. Dis- 
cussed by Professor Cope and Dr. Allen. 19. Notes on diagrams of the 
spinal cord, Dr. J. T. Duncan, Toronto, Can. 20. Duration of motion 
of human spermatozoa, Dr. Geo. Piersol, University of Penna. Dis- 
cussed by Drs. Spitzka and Heitzmann. 21. The innervation of the 
organ of Corti, Dr. Howard Ayers, Lake Laboratory, Milwaukee, Wis. 
Microscopical slides, with remarks 
New York Academy of Sciences.—Biological Section, Jan. 
9.—The following papers were presented:—A. A. Julien, Suggestions 
in Microscopical Technique, including (@) a carrier of cover impres- 
sions (mycoderm blood) utilizing as clampsa coil of brass wire mounted 
in a phial. The same device with a platinum coil serves as a conveni- 
ent staining phial for cover glass preparations; (b) a suggested 
medium for mounting delicately contractile protoplasmic objects; (¢) 
