weeks] PALEONTOLOGY, PETROLOGY, AND MINERALOGY, 1898. 19 
41 Bain (Harry Foster). [Beview of " Geologic Atlas of the United 
States, Folio No. 42. Bidwell Bar folio, California," by H. W. 
Turner.] 
Jour of Geol., vol. vi, pp. 542-544, 1898. 
42 [Review of "Clay deposits and clay industry iD North Caro- 
lina," by Heinrich Ries.] 
Jour, of Geol., vol. vi, pp. 545-547, 1898. 
43 [Review of " Bibliography and index of North American geol- 
ogy, paleontology, petrology, and mineralogy for 1896," by 
F. B. Weeks, and " Bibliograf ia geologica y minera de la 
Repdblica Mexicana," by R. Aguilar y Santillan.] 
Jour, of Geol., vol. vi, pp. 763-764, 1898. 
44 The Bonanza Arkansas coal mines. 
Eng. and Mg. Jour., vol. lxvi, pp. 579-580, 1898. 
Describes the occurrence and chemical character of the coal in 
Sebastian County, Arkansas. 
45 and Leonard (A. G.). The Middle Coal Measures of the 
western interior coal fields. 
Jour, of Geol., vol. vi, pp. 577-588, 1898 ; Abstracts, Am. Geol., vol. 
xxii, p. 251 (i p.) ; Science, new ser., vol. vii, p. 464 (-J- p.), 1898. 
Describes the conditions under which the Des Moines and Missourian 
series were laid down, gives a section of the beds in central Iowa, and 
discusses the classification and correlation of portions of the Coal 
Measures. 
46 Ball (T. H.). The Lake Michigan and Mississippi Valley watershed. 
Ind. Acad. Sci., Proc, 1896, pp. 72-73, 1897. 
Traces the course of the watershed in northern Indiana. 
47 Some notice of streams, wells, and sand ridges in Lake County, 
Indiana. 
Ind. Acad. Sci., Proc, 1896, pp. 73-75, 1897. 
Describes certain physical features of the region. 
48 Ballou (William H.). The serpentlike sea saurians. 
Pop. Sci., Mo., vol. liii, pp. 209-225, 8 figs., 1898. 
Describes the distribution and gives illustrations of saurians of 
recent and geologic time. 
49 Barbour (Erwin Hinckley). Notes on the ash beds of Nebraska 
and the Great Plains. 
The Mineral Industry for 1897, pp. 22-25, 5 figs., 1898. 
Describes the character and occurrence of the volcanic ash beds. 
50 Barlow (A. E.) and Ferrier (W. F.). On the relations and struc- 
ture of certain granites and associated arkoses of Lake 
Temiscaming, Canada. 
Brit. Assoc. Adv. Sci. Rept. 1897, pp. 659-660, 1898. 
Describes the microscopic characters and relations of the rocks. 
