392 The American Geologist. June, i89o 
ous rocks in the Yellowstone National park, Jos. P. Iddings. Bul- 
Phil. See, Washington, vol. xi, pp. 192-220. 
3. Papers in Scientific Journals. 
Can. Record of Science. On new plants from the Erian and Carbon- 
iferous, and on the characters and affinities of paleozoic gymnospermB, 
Sir. J. W. Dawson. 
Am. Nat. Sept. No. Origin of the Loess, Jno. T. Campbell. 
Am. Naturalist, Oct. No. Synopsis of the families of vertebrata, E. 
D. Cope. Feb. No. Review of the progress of American invertebrate, 
paleontology for the year 1889, C. R. Keyes. Mar. No. The teeth as 
evidence of evolution, W. C.Cohall; Genesis of the Actinocrinidse, 
Chas. R. Keyes. 
Am. Jour. Set. Feb. No. Cretaceous plantsirom Martha's Vineyard, D. 
White ; Review of R. W. Ells' second report on the geology of a portion 
of the province of Quebec, C. D. Walcott; Tracks of organic origin in 
rocks of the Animikie group, A. R. C. Selwyn. March No. Sedgwick 
and Murc'liison : Cambrian and Silurian, James D. Dana; Cretaceous 
of the British Columbian region — The Nanaimo group, Geo. M. Daw- 
son ; Celestite from Mineral county, W. Va., Geo. H. Williams ; Mineral 
locality at Branchville, Ct. Fifth paper, Brush and Dana ; Recent rock- 
flexure, Frank Cramer ; Origin of the rock -pressure of the natural gas of 
the Trenton limestone of Ohio and Indiana, E. Orton. April No. ^olian 
sandstones of Fernando de Noronha, J. C. Branner ; Occurrence of ba- 
salt dykes in the upper paleozoic series in central Appalachian Vir- 
ginia, N. H. Darton, with notes on the petrography by J. S. Diller; 
Origin of the Soda granite and quartz-keratophyre of Pigeon point, 
W. S. Bayley ; Occurrence of polycrase or of an allied species in both 
North and South Carolina, Hidden and Macintosh ; Origin of some top- 
ographic features of central Texas, R. S. Tarr; Formation of silver sil- 
icate, J. D. Hawkins. 
Ottaiva Naturalist, No. for Jan. to March. Geological progress in Cana- 
da, R. W. Ells. (President's inaugural address). April No. The Mis- 
tassini region, A. P. Low. 
Am. Antiquarian, March No. The cliff-dwellers and their works, 
Stephen D. Peet. 
4. Excerpts and Individual Publications. 
Annual report of the curator of the Museum of Comparative Zoology 
at Harvard College, 1888-89. A. Agassiz. 
The history of the Niagara river, G. K. Gilbert, Albany. From the 
sixth annual report of the Commissioners of the state reservations at 
Niagara, 1889. 
The horned Dinosauria of the Laramie, E, D. Cope. From the Ameri- 
can Naturalist, published Dec. 17, 1889. 
On excavations made in rocks by sea-urchins, J. Walter Fewkes. 
Am. Naturalist, Jan. 1890. 
Reply to the questions of Mr. Selwyn on "Canadian Geological Class- 
