tlae Carnegie Institution for Paleobotany. 1903. — Upper Cretaceous Tur- 

 tles. 1904-1905.— Tte Proembryo of the Bennettite^. 1904.— The Osteo- 

 logy of Protostega. 1906. — Dinosaurian Gastroliths, 1906. — Plastrón of 

 Protostegin». 1906.— Gastroliths. 1907. — The conservation of the great 

 Marine Vertebrates. 1908. — ^Historie Fossils Cycads. Accelerated Cone 

 Growth in Pinus. 1908. — The Wiiliamsonias of the Mixteca Alta, Oasaca, 

 México. 1909. 

 Vrittich (Dr. E.), M. S. A. — ^Las especies minerales de la Sierra de Guanajiiato, 

 México. (Bol. Soc. Geol. Mex. VI). 1909. 1 lám. — Notas mineralógicas so- 

 bre el Distrito de Guauajuato. Mineralogische Noticen über den Minen- 

 distrikts von Guanajuato. México. (Mem. Soe. Álzate, 28). 1910. 



Dons et nouvelles publications re(;ues pendant Juület et Aoüt 1910. 



Les noms des donateurs soiit ituprimés en italiques; les membres de la Société 

 sont designes avec M. S. A. 



Abbe (Cleveland). — The Mechanics of the Earth's Atmosphere. A coliection of 

 Translations. 3d Coliection. Washington. Smithsonian Miscellaneous Co- 

 llections. Vol. 51, N? 4 (Publication 1869). 1910. 8? Smithsonian Insti- 

 tution. 



Agamennone (G.), M. S. A. — Intorno ai sismogrammi senza tremiti prelimin- 

 ari. Modena (BoU. Soc. Sismolog. Ital. XÍV). 1910. 8? 



Alvarez (Ing. Manuel F.), M. S. A. — lile. Cóngrés International d'Hygiéne Sco- 

 raire. Les édifices d'Instruction PubHqne á México et état d'avancement 

 réahsé dans les établissements of&ciels et particuliers, jtisqn'en. 1909. — 

 México. 1910. 89 fig. 



Amici Romano (Domenico). — Nuova Raccolta delle vedute, obelischi, fontane, e 

 chiostri di Roma e suoi contomi disegnate dal vero e incise in rame. Anno, 

 MDCCCXXXIX. Giovanni Rafaelli, impresse. Fol. 



Beaufoy (Mark). — Mexican illutrationcs, founded npon facts; indicativo of the 

 present condition of society, manners, religión, and moráis, among the 

 spanish and native inhabitants of México: with observations upon the 

 Government and resonrces, etc. London. 1 828. 89 pl. 



Beeker (George P. ) — The Age of the Earth. Washington. Smithsonian Misce- 

 Uaneous CoUections. Vol. 56, n9 6 (Pnbl. 1036;. 1910. 8° Smithsonian Ins- 

 titution. 



Bowditch (Charles P.) — The Numeration, Calendar Systems and Astronomical 

 Knowledge of the Mayas. Privately Printed. Cambridge. The Üniversity 

 Press. 1910. 8? pl. 



Brock (R. W.) — Compte Rendu sommaire des travaux de la Coinmis4ion Géolo- 



