466 Proceedings of Scientific Societies, (April, 1883. 
Jan. 16—A paper on Quercus durandi, by S. B. Buckley, was 
read. 
Jan. 23—Dr. Skinner stated that Argynnis cydele, instead of 
carefully depositing the eggs, as is usual with butterflies, dropped 
them from a distance upon the herbage. 
Jan. 30—Papers were presented on Urnatella gracilis, by Dr. 
Leidy, and on the terrestrial Mollusks of the Society islands, by 
A. Garrett. Mr. Townsend exhibited a hybrid between the snow- 
bird and the white-throated sparrow, and stated that the hybrids 
between North American birds appeared to be rare. Professor 
Lewis presented a rudely beveled piece of sandstone from the — 
Philadelphia red gravel. It was believed to be artificial. Mr. — 
Potts stated that he had examined the dam and reservoir at Fair- 
mount for sponges, to find whether the decay of these organisms 
contaminated the water. Mpyonia leidyi, the most abundant, was 
a close-grained sponge, with but little sarcode; he did not believe 
decaying sponges caused the pollution of the water. 
Feb. 6-~Professor Cope described a new extinct genus and 
species of Sirenia under the name of. Dioplotherium manigault 
Professor Leidy exhibited some Anodontas six inches in length, 
rom a pond in New Jersey, and Professors Lewis and Heilpria 
identified them with a species found in the pre-glacial clay. 
BrotocicaL Society oF WasHINGTON, Feb. 16.—Communice 
tions were as follows: Discussion of Dr. Coues’ paper on pie! 
ical nomenclature applied to histology ; Mr. Newton P. Scu « 
-on biology and classification; Mr. John A. Ryder on the ge 
tures of protoplasm and karyokinesis. f the 
arch 2.—Professor Otis T. Mason on the human fauna 0 
District of Columbia; Dr: Thomas Taylor on section nese on 
mounting of hard woods, with illustrations; Dr. M. G. Eliseg 
hybrid sterility. 
New York Acapemy or Sciexces Feb. 12.—The vl i 
papers were read: Minerals from the Weehawken ea he 
exhibition of specimens), by Mr. B. B. Chamberlin; On ohia S 
ogy and ore-deposits of Northeastern Chihuahua, by Dr. J 
Newberry. 
Mr. 
+ ge 
APPALACHIAN Mountain CLUB, Boston, Feb. ie Club, and 
showed with a lantern some views taken on the trip AG 
by Mr. John Tatlock, Jr., on the principal co-efficien 
barometric formula of Laplace as applied to the 
tain region was read. 
AMERICAN GEOGRAPHICAL Society, Feb. 1I 
ý s h 
Alfred Aylward delivered a lecture entitled, Dute 
Africa.” 
White Mouw 
andant 
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