weeks.j PALEONTOLOGY, PETROLOGY, AND MINERALOGY, 1896. 19 
37 Barrell (Robert W.). Elkhorn Mountain and Rock Creek district 
of the Blue Mountains, Oregon. 
Eng. and Mg. Jour., vol. lxii, p. 128, 1896. 
Describes the occurrence of gold and silver ores in this region. 
38 Barton (George H.). Evidence of the former extension of glacial 
action on the west coast of Greenland, and in Labrador and 
Baffinland. 
Am. Geol., vol. xviii, pp. 379-384, 1896. 
Discusses the evidences of the former extension of the ice sheet in 
these regions. 
30 Bartsch (Paul). Notes on the Cretaceous flora of western Iowa. 
Iowa State Univ., Lal>. of Nat. Hist., Bull., vol. iii, pp. 178-182, 1896. 
Gives a list of fossil plants collected at Holman Cut, Woodbury 
County, Iowa. 
40 Bascom (Florence). Volcanic rocks of South Mountain, Pennsyl- 
vania. 
U. S. Geol. Surv., Bull. No. 136, 124 pp., 28 pls. ; 1896. 
Gives a historical review of geologic surveys in the region and list of 
bibliographic references. Describes the character, distribution, and age 
of the sedimentary and eruptive rocks, and the petrographic character 
of the Cambrian, acid eruptive and basie eruptive rocks, including a 
discussion of their nomenclature. Gives a list of papers on acid vol- 
canics and devitrification and on spherulites. 
41 A pre-Tertiary nepheline-bearing rock. 
Jour, of Geol., vol. iv, pp. 160-165, 1896. 
Gives a description of the megascopic and microscopic characters of a 
glacial bowlder from Ohio, and discusses the evidences of its age. 
42 Perido-steatite and diabase. 
Phil. Acad. Nat. Sci., Proc, 1896, pp. 219-220, 1896. 
Comprises brief notes on the characters of these rocks from near 
Philadelphia, Pa. 
43 Bashore (Harvey B.). Notes on Glacial gravels in the lower Sus- 
quehanna Valley [Pennsylvania]. 
Am. Jour. Sci., 4th ser., vol i, pp. 281-282, 1896. 
Gives the results of recent observations on the Glacial geology of this 
region. 
43a Bassler (R. S.), Harper (G-. W.) and. Catalogue of the fossils of 
the Trenton and Cincinnati periods, occurring in the vicinity 
of Cincinnati, Ohio. 
See Harper (G. W.) and Bassler (R. S.) No. 274a. 
44 Bather (F. A.). [Eeview of "New and interesting species of Paleo- 
zoic fossils," by S. A. Miller and Wm. F. E. Gurley.] 
Am. Geol., vol. xvii, pp. 184-186, 1896. 
45 Beadle (H. M.). Mineral regions of British Columbia. 
Eng. and Mg. Jour., vol. lxii, pp. 104-105, 1896. 
Describes the occurrence of gold in the Trail Creek mining region, 
British Columbia. 
