880 The American Naturalist. [October, 
The Volcanic Craters of the United States, by Rob’t T. Hill; Recent 
Geologica] Explorations in Mexico, by Rob’t T. Hill; Presentation of 
Samples from Salt Mines of New York, by S. A. Lattimore. 
Friday, August 19.—Paleobotany of the Yellow Gravel at Bridgeton, 
N. J., Arthur Hollick; The Mining, Metallurgical, Geological, and 
Mineralogical Exhibits to be Shown at the World’s Columbian Expo- 
sition, Geo. F. Kunz; Cerro-Viejo and Its Cones of Voleanic Ejecta 
and Extrusion in Nicaragua, John Crawford ; Pleistocene Geography, 
W. J. McGee; Submarine Valleys on Continental Slopes, Warren 
Upham; The Homotaxic Relations of the North American Lower 
Cretaceous, Robt. T. Hill. 
Monday, August 22.—Distributions of the Lafayette Formation, 
W. J. McGee; Cenozoic Beds of the Staked Plains of Texas, E. D. 
Cope; Exhibitions of Guelph Fossils Found in Rochester, N. Y., 
Albert L. Arey; The American Mastodon in Florida, John Kost; 
Some Problems of the Mesabi Iron Ore, N. H. Winchell; The Mathe- 
matics of Mountain Sculpture, Verplank Colvin; A New Genus of 
Marsupialia from the Laramie, E. D. Cope. 
Sxction F, Biology.—It was decided that hereafter the Biological 
Section shall be divided into two, those of Zoology and Botany. 
Thursday, Aug. 18.—Notes on Ranunculus repensand its Eastern 
North American Allies, by N. L. Britton; Notes on a Monograph of 
the North American Species of Lespedeza, by N. L. Bitton ; Contribu- 
tion on the Digestive Tract of Some North American Ganoids, by G. 8. 
Hopkins; The Root System of Mikania scandens L., by W. W. Rowlee ; 
The “ Maxillary Tentacles” of Pronuba, by J. B. Smith; Preliminary 
Comparison of the Hepatic Flora of Boreal and Sub-boreal Regions, by 
L. M. Underwood; On the Value of Wood Ashes in the Treatment of 
Peach Yellows, by E. F. Smith; On the Value of Superphosphates and 
Muriate of Potash in the Treatment of Peach Yellows, by E. F. Smith ; 
Spikes of Wheat Bearing Abnormal Spikelets, by W. J. Beal; A 
Study of the Relative Lengths of the Sheaths and Internodes of 
Grasses for the Purpose of Determining to What Extent This is a 
Reliable Specific Character, by W. J. Beal; Adaptation of Seeds to 
Facilitate Germination, by W. W. Rowlee; Report of Biological 
Section of the Committee on the Naples Table, by C. W. Stiles ; Bac- 
teriological Investigations of Marine Waters and the Sea Floor, by 
H. L. Russel. 
Friday, August 19—Notes on Maize, G. Macloskie; Sketch 
of the Flora of Death Valley, California, F. V. Coville; How 
