weeks.] PALEONTOLOGY, PETROLOGY, AND MINERALOGY, 1901. 71 
625 Pratt (Joseph Hyde) and Penfield (S. L.). On the occurrence of 
thaumasite at West Paterson, New Jersey. 
See Penfield (S. L.) and Pratt (J. H.), 602. 
620 Preston (C. H.). Prof. W. H. Barris. 
Am. Geol., vol. 28, pp. 358-361, pi. 33, 1901. 
Gives a sketch of his life and work on the paleontology of Iowa. 
627 Price (J. A.) and Shaaf (Albert). Spy Run and Poinsett lake 
bottoms [Indiana]. 
End. Acad. Sci., Proc. for 1900, pp. 179-181, 1901. 
Describes glacial phenomena, 
628 - - Abandoned meanders of Spy Run Creek [Indiana]. 
End. Acad. Sci., Proc. for 1900, pp. 181-184, 1 fig., 1901. 
Describes its drainage modifications. 
629 Prosser (Charles S.)« The classification of the Waverly series of 
Central Ohio. 
Jour. Geol., vol. 9, pp. 205-231, figs. 1-4, 1901. 
Reviews the various classifications of this series that have been pub- 
lished, describes the character and occurrence of the strata, and gives 
the author's classification. 
630 - - [On the use of the term Bedford limestone.] 
Jour. Geol., vol. 9, pp. 270-272, 1901. 
Reviews an article by C. E. Siebenthal on the same subject and con- 
siders the name Bedford as applied in Ohio should be accepted. 
631 The Paleozoic formations of Allegany County, Maryland. 
Jour. Geol., vol. 9, pp. 409-429, figs. 1-4, 1901. 
Describes the character and occurrence of the various Paleozoic forma- 
tions and discusses their probable correlations with New York and 
Pennsy 1 vanian formations. 
632 — — Names for the formations of the Ohio Coal Measures. 
Am. Jour. Sci., 4th ser., vol. 11, pp. 191-199, 1901. 
Reviews previous classification and nomenclature of the Coal Meas- 
ures of Pennsylvania and West Virginia and presents a section and the 
classification of the Coal Measures of Maryland, which lias been adopted 
for the Ohio Coal Measures. 
633 Purdue (A. H.). Valleys of solution in northern Arkansas. 
Jour. Geol., vol. 9, pp. 47-50, figs. 1-2, 1901. 
Describes the character and occurrence of these valleys and discusses 
their origin. 
634 - - Illustrated note on a miniature overthrust fault and anticline. 
Jour. Geol., vol. 9, pp. 341-342, 1 fig., 1901. 
Describes a miniature anticline passing into a reversed fault at 
Ozark, Ark. 
635 Physiography of the Boston Mountains, Arkansas. 
Jour. Geol., vol. 9, pp. 694-701, tigs. 1-2, 1901. 
Abstract: Sci. Am. Suppl., vol. 52, p. 21505, 1901. 
Describes the structural and topographic features of the region. 
