weeks] PALEONTOLOGY, PETROLOGY, AND MINERALOGY, 1896. 77 
500 Salisbury (Rollin I).)- Surface Geology — Report of Progress, 
1895 [New Jersey]. 
N. J. Gcol. Surv., Ann. Rept. for 1895, pp. 3-16, pis. i-iii, 1896. 
Describes the occurrence and character of the Miocene, Pensauken, 
and Jamesburg formations in certain portions of the State. Presents a 
map showing the distribution of the Pensauken formation in New 
Jersey. 
591 The Philadelphia brick clays et al. 
Science, new ser., vol. iii, pp. 480-481, 1896. 
Discusses briefly the evidence as to the age of these clays, forming a 
part of the Columbia formation. 
592 Loess in the Wisconsin drift formation. 
Jour, of Geo!., vol. iv, pp. 929-937, 1896. 
Describes the characters and relations of the loess and drift beds in 
Wisconsin. 
593 Stratified drift. 
Jour, of Geol., vol. iv, pp. 918-970, 1896. 
Describes the origin and formation of stratified drift deposits and dis- 
cusses their relations to unstratified drift beds. 
591 Salisbury] (K, D.). [Keview of "Physical features of Missouri," 
byO. F. Marbut.] 
Jour, of Geol., vol, iv, pp. 877-878, 1896. 
595 Salisbury (Rollin D.). Volcanic ash in southwestern Nebraska. 
Science, new ser., vol. iv, pp. 816-817, 1896. 
Describes volcanic ash beds near Ingham and Orleans, Nebr. 
596 Sapper (Carlos). Geology of Chiapas, Tabasco, and the peninsula 
of Yucatan. Translated by C. Joaquina Maury and G. D. 
Harris. 
Jour, of Geol., vol. iv, pp. 938-947, 1896. 
Describes the distribution of the Carboniferous, Cretaceous, and Ter- 
tiary formations aud crystalline rocks, and gives a list of Pliocene fossils 
collected by Professor Heilprin. 
597 Sobre la geografia fisica y la Geologia de la peninsula de 
Yucatan. 
Institute geologico de Mexico, Bull. No. 2, 57 pp., 1896. 
Describes the character and distribution of the igneous, Cretaceous, 
Tertiary, and Pleistocene rocks of the regions. Includes a geologic map 
and cross section. 
598 Sardeson (P. W.). The Galena and Maquoketa series. 
Am. Geol. vol. xviii, pp. 356-368, 1896. 
Defines the terms Galena and Maquoketa scries, and gives tables of 
synonymy by each division and classification by authors generally. 
599 Say (Thomas). A reprint of the paleontological writings of 
Thomas Say, with an introduction by G. D. Harris. 
Am. Pal., Bull., vol. i, No. 5, 103 pp., pis. vii-xiii, 1896. 
Comprises a republication of the following papers : Fossil zoology, t wo 
papers; Fossil shells found in a shell mass from An astasia Island; An 
account of some of the fossil shells of Maryland; and Crinoidea. 
