weeks.] PALEONTOLOGY, PETROLOGY, AND MINERALOGY, 1895. 63 
308 Penrose (E. A. P., jr.), aud ladings (J. P.). Review of the 
"Penokee iron-bearing series of Michigan and Wisconsin," 
by R. D. Irving and 0. B. Van Hise. 
Jour, of Geol., vol. iii, pp. 221-227. 
369 and Quereau (E. C.) Review of " Vol. VII. Geological Survey 
of Ohio." 
Jour, of Geol., vol. iii, pp. 353-357. 
370 Perrine (Charles D.). Earthquakes in California in 1894. 
U. S. Geol. Surv., Bull. No. 129, 23 pp. 
Includes a chronologic record of earthquakes occurring on the Pacific 
Coast in 1894. 
371 Phillips (William B.), Coal in western North Carolina. 
Eng. and Mg. Jour., vol. Ix, pp. 612-613. 
Describes the occurrence of coal in rocks of possible Cambrian age. 
372 Pirsson (Louis V.). Complementary rock and radial dikes. 
Am. Jour. Sci., 3d ser., vol. 1, pp. 116-121. 
Describes the smaller bodies, usually dikes and sheets, which fre- 
quently accompany large intrusions of massive igneous rocks, which are 
in part more basic and in part more acid than the main bodies. Such 
rocks are known as complementary rocks. Discusses the use of the term 
lamprophyre for the basic type, and suggests the term oxyphyre for the 
acid type. Considers that radial dikes around an eruptive center are 
usually of later formation, and are most typical in areas of undisturbed, 
homogeneous, and sedimentary strata; further, that normally oxyphyres 
most commonly cut the central stock and lamprophyres the outer zone 
of sedimentaries. 
373 On some phonolitic rocks from Montana. 
Am. Jour. Sci., 3d ser., vol. 1, pp. 394-399. 
Describes the megascopic and microscopic characters of pseudo-leucite 
sodalite-tinguaite, and quartz-tinguaite porphyry. 
374 Weed ( W. H.) and. On the igneous rocks of the Sweet Grass 
Hills, Montana. 
Am. Jour. Sci., 3d ser., vol. 1, pp. 309-313. 
See Weed (W. H.) and Pirsson (L. V.), No. 523. 
375 Igneous rocks of Yogo Peak, Montana. 
Am. Jour. Sci., 3d ser., vol. 1, pp. 467-479. 
See Weed (W. H.) and Pirsson (L. V.) No. 524. 
376 Highwood Mountains of Montana. 
Geol. Soc. Am., Bull., vol. vi, pp. 389-422, pis. 24-26. 
See Weed (W. H.) and Pirsson (L. V.) No. 522. 
377 Posepny (F.). [The genesis of ore deposits.] 
Am. Inst. Mg. Engrs., Trans., vol. xxiv, pp. 962-980. 
Reviews discussions of a forinov paper by the author on the same 
subject. 
