182 The American Naturalist. [February, 
forms a closely connected and consecutive phylum, reaching from the 
base of the Puerco to the Bridger formation, and leading directly to 
the Gravigrada or ground sloths. A second family, viz., the Conoryctide, 
composed of Conoryctes and Onychodectes may be regarded as ancestral 
to the Armadillos. The character and origin of the Edentate fauna of 
South America was discussed at length, and the conclusion reached 
that its original home was in North America. It was further held that 
there was a migration to the southward before the close of the Eocene, 
and that there must have then been an early land connection between 
the two continents.—C. L. BRISTOL, Secretary. 
University of Pennsylvania Biological Club.—Monday, Jan- 
uary 4th, Program. Demonstrations: “ Descriptive Demonstration of 
the Life-History of Sacculina, H. Heath. Reviews: “ Zoological,” Drs. 
Moore and Calvert ; “Chemical,” Dr. Mary E. Pennington; “ Patho- 
logical,” Dr. Ferree Witmer; “ Botanical,’ Dr. Macfarland, Mrs. 
Wilson. (Time limit for each review, five minutes.) Original Com- 
munication, by Dr. Edw. D. Cope, “ The Embryonic Appendages and 
the Evolution of Mammalia.”—H. C. PORTER, Secretary. 
January 18.—Program Demonstration, Cell changes in Spirogyra 
grown under color-screens, Dr. Mary E. Pennington: Review.—Zoolog- 
ical: Dr. P. Calvert, Chemical; Dr. Mary E. Pennington, Botanical ; 
Dr. J. Harshberger, Original Communications.—Account of the Boston 
meeting of the Society of American Naturalist and Affiliated Societies. 
Profs. Macfarlane, Conklin, Witmer, and Cope—H. C. PORTER, 
Secretary. 
The Biological Society of Washington.—January 2, 1897.— 
The following communications were made: “ Brief Informal Notes and 
Exhibition of Specimens,” (All the members are cordially invited to 
take part); E. W. Nelson, “ New Birds from Mexico ;” F. A. Lucas, 
“On the Natural Mortality Among Fur Seals; ” C. Hart Merriam, 
“ On the Pribilof Island Hair Seal;” W. H. Dall, “ Notes on the Mol- 
luscan Fauna of the Pribilof Islands.” —FreDERICK A. Lucas, Seere- 
tary. ; 
January 16.—The following communications were made: David 
White, “ A New Lycopodineous Cone from the Coal Measures of Mis. 
souri;”’ David White, “ Unity or Plurality of Type Specimens 10 
Paleontology ;” Edward L. Greene, “ Development of the Idea of a 
Genus;” M. A. Carleton, “ Ontogenetic Separation of Puccinia gramms 
dvene from P. graminis tritici.” —FREDERIC A. Lucas, Secretary. 
