DONS. — SÉANCES DU 4 ET DU 25 MAI 1891 
85 
p. 409-415. — W. P. Headden : Phosphates from the Black Hills, p. 415-417. — 
W. E. Hidden a. J. B. Macintosh : Supplementary notice on the polycrase of North 
and South Carolina. p. 423-425. 
New-York. — Bulletin of the American Muséum of Natural 
History. Vol. III, n° 1, déc. 1890. 
Philadelphie. — Proceedings of the Academy of Natural Sciences 
of Philadelphia. Oct.-déc. 1890. 
II. A. Pilsbry : Trochidæ, new and old, p. 343-344. — Ch. Wachsmuth a Fr. 
Springer : The perisomic plates of the Crinoids, p. 345-392, pl. IX-X. — Ang. Heil- 
prin : The Eocene Mollusca of the State of Texas, p. 393-406, pl. XI. — Th. D. Band, 
Geology of the South (Chester) Valley Hill, p. 435. — L. Woolman : Geology of 
Artesian Wells. Atlantic City, N. J., p. 444.— Ang. Heilprin : The geology and 
paleontologv of the Cretaceous Deposits of Mexico, p. 445-469, pl. XII-X1V. 
— Proceedings of the American Philosophical Society. Yol. NXVIII, 
n° 124, july-dec., 1890. 
Topeka. — Transactions of the22 d meeting of the Kansas Academy 
of Science. 1889, vol. NII. 
Grande-Bretagne. — Londres. — Proceedings of the Royal 
Society. Vol. XLIX, n° 298, 1891. 
W. G. Williamson : On the organisation of the fossil plants of the Coal-measures, 
XVIII, p. 454-155. 
— The Quarterly Journal of the Geological Society. Yol. XLVII, 
n° 186, may 1891. 
A. Geikie : The Anniversary address of the President, p. 48-162. — E. Hill a. 
T. G. Bonney : On the north-west région of Charnwood Forest, p. 78-100, 1 pl. — 
T. G. Bonney : Note on a contact-structure in the Syenite of Bradgate Park, p. 101 - 
108. — Ch. Callaway : On the unconformities between the rock-systems under- 
lying the Cambrian Quartzite in Shropshire, p. 109-125, 1 pl. — J. Prestwich : On 
the âge, formation and successive driftstages of the valley of the Darent, p. 126-163, 
pl. VI-V1I. — II. G. Seeley : On Agrosàurus Macgillivrayi (Seeley), a Saurichnian 
Reptile from the N. O. Coast of Australia, p. 164-169, 2 pl. — Thos II. Holland : 
Notes on rock-specimens collected by W. Gowland in Korea, p. 171-196. — J. B. Har- 
rison : The Geology of Barbados, p. 197-265, pl. IX. 
— Proceedings of the Geologists’ Association. Vol. XI, nov., 1890. 
II. B. Woodward : Brief notes on Lhe Geology of the Mendip Hills, p. 481-494. 
— The Geological Magazine. N. S. Dec. III. Vol. VIII, n° 5 (323). 
May 1891. 
0. C. Marsh : The gigantic Ceratopsidae, p. 193-199, pl. IV-V. — II. G. Seeley : On 
Bubalus Bainii, p. 199-202. — B. B. Newton : On the gcnus Lévcillia, p. 202-209, 
pl. VI. — W. T. Blanford : Note on the âge of the Himalaya!, p. 209-210. — Ch. Da- 
vison : Note on mounlain-evolulion, p. 210-241. — A. Smith Woodward : On a 
