50 BIBLIOGRAPHY AND INDEX OF N. A. GEOLOGY, [bull. 162. 
357 Hill (Robert T.) and Vaughan (Thomas Wayland). Nueces folio, 
Texas. 
U. S. Geol. Surv., Geol. map of U. S., Folio No. 42, 1898. 
Describes the physiography of the quadrangle and the character and 
occurrence of the Cretaceous, Neocene, and Pleistocene strata. Dis- 
cusses the geologic history of the region and describes the occurrence 
of underground waters. Includes geologic and topographic maps and 
a sheet of columnar sections. 
358 Hille (F.). The western Ontario gold fields and their genesis. 
Federated Can. Mg. Inst., Jour., vol. ii, pp. 73-92, 3 tigs., 1897, 
Discusses the origin of the gold ores. 
359 Hillebrand (W. F.). Distribution and quantitative occurrence of 
vanadium and molybdenum in rocks of the United States. 
Am. Jour. Sci., 4th ser., vol. vi, pp. 209-216; Review, Am. Geol., vol. 
xxii,p.380(£p.), 1898. 
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360 Hills (R. 0.). Ore deposits of Camp Floyd district, Tooele County 
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See Bibliography and Index for 1896, No. 318. 
361 The Costillo meteorite. 
Colo. Sci. Soc, Proc, vol. v, pp. 121-122, 1 pi., 1898. 
See Bibliography and Index for 1896, No. 319. 
362 Hitchcock (0. H.). The Hudson River lobe of the Lauren tide ice 
sheet. 
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363 The southern lobe of the Laurentide ice sheet. 
Brit. Assoc. Adv. Sci., Rept. 1897, pp. 653-654, 1898. 
Contains a brief discussion of the extent of the ice sheet in northern 
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364 Hoffmann (G. Christian). Report of the section of chemistry and 
mineralogy. 
Canada Geol. Surv., new ser., vol. ix, Rept. R, 53 pp., 1898. 
Includes descriptions of occurrence of various minerals and chemical 
analyses of rocks. 
365 On a remarkable occurrence of xenotime. 
Am. Jour. Sci., 4th ser., vol. v, p. 235 (£ p.), 1898. 
Describes the characters of the mineral. 
366 Baddeckite, a new variety of muscovite. 
Am. Jour. Sci., 4th ser., vol. vi, pp. 274-275, 1898. 
Describes its occurrence in Nova Scotia and its chemical analysis. 
367 Hollick (Arthur). Notes on Block Island [Rhode Island], 
N. Y. Acad. Sci., Annals, vol. xi, pp. 55-72, pis. ii-ix, 1898. 
Includes notes on the geology and paleontology of the island. 
