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Extr. Proceeds. Amer. Philos. Soc., Vol. XXXII. 
Scott, W. B.—Protoptychus hatcherii, a new Rodent = = Uinta Eocene. 
Extr. Dioki Phila. Acad. Nat. Sci., 1895. From the 
SHIPLEY, S. R.—Gold, Silver and Monor. Extr. iier Tui 1895. From 
the author. 
Stiles, C. W.—Notes on Parasites 32, 33, 34, 38 and 39. Extr. Veterinary 
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Hassali. Extr. Journ. Comp. Med. & Veterinary Arch., 1894-1895. From the 
author. 
Waite, C. A.—The Bear River Fauna and its Characteristic Fauna. Bull. 
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General Notes. 
PETROGRA PHY.’ | 
The Eruptives and Tuffs of Tetschen.—Two interesting arti- 
cles on the area of crystalline rocks east of Tetschen on the Elbe, have 
appeared simultaneously. The first, by Hibsch, is a description of 
the Tetschen’ sheet of the map of the Bohemian Mittlegebirges, and the 
second by Graber,’ is on the fragments and bombs occurring in the 
tephrite tuffs of the region. 
The voleanic rocks of the district are interbedded basalts, tuffites, 
tuffs and tephrites, of which the fragmental rocks are in greatest abun- 
dance. Augitites also occur as sheets, and camptonites as dykes in 
upper Cretaceous marls. The older igneous rocks are granitites and 
diabases that are associated with clay slates, probably of Cambrian age. 
Analyses of each of these rocks are given but the rocks are not de- 
scribed in detail. The greater portion of the author’s article deals 
with the volcanic rocks. The tuffs are composed of basaltic and teph- 
ritic fragments of the coarseness of sand in some cases, and in others of 
1 Edited by Dr. W. S. Bayley, Colby University, Waterville, Me. 
2 Min. u. Petrog. Mitth,, XV, 1895, p. 201. 
*Ib., p. 291. 
