140 GEOLOGY, 



Quatrefages, Prof. A. de. [Shell-beds of Brazil.] Bull. Soc. Oeogr, 



Paris, 6 ser. t, xi. p. 673. 

 A mass of these deposits containing a human skeleton has been given 

 to the Paris Museum. 



Raymond, R. W. The Spathic Iron Ores of the Hudson River. 

 Trans. Amer. Inst. Min. Eag. vol. iv. pp. 339-343. 



Draws attention to some developments recently made on the E. bank 

 of the Hudson River in the mining of these ores. The rocks under- 

 lying the ore are slates, those above being either shale or limestone ; 

 weathered specimens assume the appearance of red hematite, though 

 the interior is unaltered. These developments suggest that carbonates 

 of iron may be found elsewhere in the older formations. Gives an 

 analysis, and reports of blast-furnace managers. R. B. N. 



Richter, — , and — Hiibner. Berg- u. hiittenmannische Mitthei- 



lungen iiber Mexiko und einen Theil von Siidamerika. [Mines 



and Smelting-works of Mexico and Parts of S. America.] Zeitsch. 



Berg-, Hiltt. Salinenw. vol. xxiv. pp. 54-72, 223-234, 487-502. 



Sketches of the physical and geological character of the principal 



gold and silver producing districts of Mexico, and Central and S. 



America, with statistics of the production of the mines. Part i. refers 



to Mexico, part ii. to Columbia, Ecuador, Peru, and Chili. H. B. 



Rigby, Dr. Papers on Elorida. Cincinnati. 

 Contains geological notes. 



St. John, 0. Notes on the Geology of North-eastern New Mexico. 

 Bidl. U. S. Geol. Surv. Territories, vol. ii. pp. 279-308, pis. 42-49. 



The upper basin of the Canadian River is occupied by Cretaceous 

 shales (series no. 4 of U. Missouri), passing to N.W., N., and E., under 

 Lignitic (Eocene) beds, which extend to the W. and N. watersheds. 

 To the S. and S.W. are metamorphic rocks ; and at one point U. Car- 

 boniferous beds occur. Basaltic rocks traverse and overlie all the fore- 

 going, metamorphosing them in places. The craters are visible ; and 

 saline springs remain. Sections are given of the Lignitic, which is 

 conformable to the Cretaceous : the dip is N.E., 14 feet in a mile. Gold 

 is obtained by washing and lode-mining in the S.W. of the district. 

 The superficial deposits are described. W. H. D. 



Schmidt, Dr. Adolf. Blei- und Zinck-Erz Lagerstatten in Siidwest- 

 Missouri. [Lead and Zinc Ore-deposits in S.W. Missouri.] Hei- 

 delberg. 



Selwyn, A. R. C. Geological Survey of Canada. Report of Progress 



for 1874-75. Pp. 319. 8vo. 

 Contains the following Reports : — 

 Summary Report of Geological Investigations, pp. 1-23. 

 On the Country west of Lakes Manitoba and Wiunipegosis, with 

 notes on the Geology of Lake Winnipeg. By Robert Bell. Pp. 24- 



