ADDITIONS TO THE LIBRARY. 125 
in Mihren, 150.—A. Becker. Ueber das specifische Gewicht der Quarze 
in verschiedenen Gesteinen, 158.—K. von Chrustschoff. Ueber ein neues 
aiussereuropaische Leucitgestein, 160.—K. von Chrustschoff. Ueber ein 
neues typisches zirkonfiihrendes Gestein, 172. 
Warwick. Warwickshire Naturalists’ and Archeologists’ Field 
Club. Proceedings, 1882. 1883. 
P. B. Brodie. On Fossil Arachnida, including Spiders and Scorpions, 
9.—E. A. Walford. On some Crinoidal and other Beds in the Great 
Oolite of Gloucestershire and their probable equivalents in North Oxford- 
shire, 20. 
Washington. Smithsonian Institution. Annual Report for the 
year 1881. 1883. 
Miscellaneous Collections. (8vo.) Vol. xxi. 1882. 
Art. I. Proceedings of the United-States National Museum. Vol. 
ia (AUS tlO) ial Roto 
C. A. White. Note on the Occurrence of Productus qiganteus in Cali- 
fornia, 46.—C. A. White. Note on Acrothele, 47.—C. A. White. De- 
scription of a new Cretaceous Pinna from New Mexico, 47.—C. A. White. 
Note on the Occurrence of Stricklandia Saltert and S. Davidsonz in Georgia, 
48.—C. A. White. Description of a large Fossil Gasteropod from the 
State of Puebla, Mexico, 140.—A. Heilprin. On some new Species of 
Eocene Mollusca from the Southern United States, 149.—C. A. White. 
Description of new Invertebrate Fossils from the Mesozoic and Cenozoic 
Rocks of Arkansas, Wyoming, Colorado, and Utah, 157.—F. M. Endlich. 
List of Species and Varieties of Minerals in the National Museum of the 
United States in 1879, 333. 
Art. II. Proceedings of the United-States National Museum. 
Vol. iv. (1881). 1882. 
G. W. Hawes. On the Mineralogical Composition of the Normal 
Mesozoic Diabase upon the Atlantic Border, 129.—G. W. Hawes. On 
the Determination of Felspar in thin Sections of Rocks, 134.—C. A. 
White. On certain Cretaceous Fossils from Arkansas and Colorado, 136, 
. : Vol. xxii. 1882. 
Bulletins of the United-States National Museum. Vola 
Nos. 11-15. 1882. 
; =) Volixexiven loos: 
Bulletins of the United-States National Museum. Vol. iii. 
No. 16. 1882. 
wee VViolexxy. Ml Seo: 
Art. I. Bulletin of the Philosophical Society of Washington. 
Vol. iv. (1880-81). 1888. 
J. E. Todd. Quaternary Deposits of Western Iowa and Eastern 
Nebraska, 120. 
Art. II. Bulletin of the Philosophical Society of Washington 
Vol. v. (1881-82). 1883. 
Art. ITI. Transactions of the Anthropological Society of Wash- 
ington. Vol. i.(1879-82). 1882. 
