78 BIBLIOGRAPHY AND INDEX OF N. A. GEOLOGY, [bull. 146. 
504 Vaughan (T. Wayland). The stratigraphy of northwestern Lou- 1 
isiana. 
Am. Geo!., vol. xv, pp. 205-229. 
Reviews the literature of the Cretaceous and Tertiary strata of the 
region and describes the lithologic and faunal characters of the Eocene 
deposits. Gives lists of fossils collected at various localities. Discusses 
the relations of the Eocene and Miocene formations and the distribution 
of the Sparta sands of undetermined age, and the character of the Pleis- 
tocene and Recent deposits. 
505 Section of the Eocene at Old Point Caddo Landing, Harrison 
County, Texas, with notes upon a collection of plants from 
that locality, by F. H. Knowlton. 
Am. Geol., vol. xvi, pp. 304-309. 
Describes the section at this locality and gives a list of fossils col- 
lected, and also fossils collected at Cross Lake and Mansfield, La. 
506 Vogdes (A. W.). Notes on Paleozoic Crustacea No. 4. On a new 
trilobite from Arkansas Lower Coal Measures. 
Cal. Acad. Sci., Proc, vol. iv, pp. 589-591. 
Describes the characters of Griffithides ornata n. sp., from the Coal 
Measures of Arkansas and discusses its affinities. 
507 A supplement to the bibliography of the Paleozoic Crustacea. 
Cal. Acad. Sci., Proc, vol. v, pp. 53-76. 
This paper is a continuation of the Bibliography of Paleozoic Crus- 
tacea published in Occasional Papers of the California Academy of 
Sciences, No. iv, 1893, bringing it up to date (1896) and correcting some 
errors and omissions of the first edition. 
508 Volckening (G. J.) and Luquer (L. McL). On three new analyses 
of sodalite from three new localities. 
Am. Jour. Sci., 3d ser., vol. xlix, pp. 465-466. 
See Luquer (L. McL) and Volckening (G. J.), No. 302. 
w. 
509 Walcott (Charles Doolittle). Lower Cambrian rocks in eastern 
California. 
Am. Jour. Sci., 3d ser., vol. xlix, pp. 141-144. 
Mentions the previous descriptions of the White Mountain region. 
Gives a section of the rocks of Black Canyon and a summary of the 
entire section — 4,900 feet of quartzites, limestones, and shales. Describes 
the character of the fauna and considers that it represents the oldest of 
the Cambrian faunas of western United States. 
510 The Appalachian type of folding in the White Mountain 
range of Inyo County, California. 
Am. Jour. Sci., 3d ser., vol. xlix, pp. 169-174. 
Gives a general section of the rocks of this range and describes the 
geologic structure as exhibited in Silver and Black canyons. Illustrates 
the structure by several figures. 
