52 DONS. — 21 PÉVRIER-25 AVRIL 1881 
De Cortazar. — Resena fisica y geologica de la provincia de Ciudad-Real. 
C. Castel. — Descripcion fisica, geognostica, agricola y forestal de la provincia 
de Guadalajara. 
Etats-Unis. Boston. American Academy of Arts and Sciences. 
Proceedings of the —, New Séries, t. VII, n° 2, déc. 1879 à mai 1880. 
— Boston Society of Natural History. Memoirs of the —, t. lïl, 
Partie 2, n° 3. 
S. -H. Scudder. — Palœozoïc cockroaches : a complète revision of the species 
of both worlds with an essay towards their classification. 
— — Occasional papers of the — , n° 3. 
W, 0. Crosby. — Contributions to the geology of Eastern Massassuchets. 
Proceedings of the —, t. XX, part. 2 et 3, nov. 1879 — 
janv. 1880. 
Shaler. — Evidences of a graduai passage from sedimentary to volcanic Rocks 
in the Brighton district, 129. 
W. 0. Crosby. — Occurrence of fossiliferous Boulders in the drift of Truro, 
Cape Cod, 136. — A possible origin of petrosilicious Rocks, 160. — Evidences 
of compression in the rocks of the Boston basin, 308. 
Sterry-Hunt. — Remarks on the Precambrian Rocks of Great Britain, 140. 
G. Fred. Wright. — The kames and moraines of New England, 210. 
Warren Upham. — Glacial Drift of Boston and Vicinity, 220. 
S. Kneeland. — The mineralized phosphatic guanos of the equatorial pacifie 
Islands, 235. 
S. ScudJer. — Probable âge of Haulover Beach, Nantucket harbor, 329. 
Newhaven. The american Journal of Science, t. XXÏ, n*'' 123 et 
124, mars-avril 1881. 
S. Scudder. — Structure and affinities of Euphoberia of Meek and Wor- 
then, 182. 
Marsh. — Monograph on the Odontornithes, or toothed birds of North 
America, 255. — New order of extinct Jurassic Reptiles. {Cœluria) 339. — 
Discovery of a fossil bird in the Jurassic of Wyoming, 341. — American 
Pterodactyls, 342. 
E. A. Smith. — The geology of Florida, 392. 
H. S. Williams. — Channel-fillings in Upper devonian shales, 318. 
New York. Lyceum of Natural History. Annals of the — , 
t. XI, n° 13. 
— Academy of Sciences. Annals of the —, t. I, n<» 9-13, J879-80. 
Philadelphie. Academy of Natural Sciences of — . Proceedings of 
the —, 1879, Parties 1 à 3. 
Leidy. — Fossil Remains of a Caribou, 32. — Fossil foot tracks of the An- 
thracite Coal Measures, 164. — Explosion of a Diamond, 195. 
V. Lyon. — Descriptions of three new species of Calceolidœ from the upper 
Silurian Rocks of Kentucky, 43. 
Goldsmith. — On Amber containing fossil Insects, 207. 
