_ -1893.] Proceedings of Scientific Societies. 313 
tion of the germ of the peripheral nervous system, A. Plitzine-—Note 
on the development of the endothelium of the heart in the amphibians, 
V. Roudnev.—On the development of Chrysopa perla, Mme. O. Tic- 
homirova.—On the segmentation of the egg, and the formation of the 
blastoderm of the Pseudoscorpionidex, Fr. Vejdovsky.—On an embry- 
onic organ of the Pseudoscorpionide, Fr. Vejdovsky.—Contribution to 
the history of the parasites of the Hymenoptera, N.|Koulaguine—The 
use of embryological researches for classification, A. Tichomiroff. 
Physiology and Physiological Chemistry :—On the phosphorescence 
of animals in the Black Sea, P. Khvorostansky. 
Morphology and Comparative Anatomy :—What is meant by “the 
water vascular system, the segmental organs, the excretory organs, and 
the nephridia, L. Cosmovici—Presence or absence of an excretory appa- 
ratus in the genital organs of the Metazoa, H. von Ihering.—Note on 
metameric signification of the cranial nerves, P. Mitrophanovy.—Posi- 
tion of the Strepsipteride in the system according to the data of post- 
embryonic development and of anatomy, N. Nassonov.—On the excre- 
tory organs of terrestrial arthropods, A. O. Kovalevsky.—On the 
origin and ot of the Arthropods, particularly the tracheated 
arthropods, N raf. 
Boston Society of Natural History.—January 18, 1893.— 
The following paper was read: Report on a study of Glacial sand- 
plains in Eastern Massachusetts, illustrated by lantern slides, by Pro- 
fessor W. M. Davis and students in geological field-work in Harvard 
University. SAMUEL HENSHAW, Secretary. 
