130 GEOLOaY. 



western Pennsylvania, and Western New York, by [Prof.] J. P. 

 Lesley. 2nd Geol. Survey of Pennsylvania. Pp. 132, map, and 

 illustrations. 8vo. 



Chapman, Prof. E. J. On the Leading Geological Areas of Canada. 

 Canad. Journ. pp. 92-121. 



Continuation of a paper noticed in the Geological Recoed for 1875, 

 p. 115. Deals with the principal geological areas in the provinces of' 

 Quebec, New Brunswick, and Nova Scotia, giving a condensed account 

 of the more important geological features of each. H. A. N. 



An Outline of the Geology of Canada. Pp. 106, maps, and 



6 plates (fossils). 8vo. Toronto. 



Cox, Prof. E. T. Seventh Annual Report of the Geological Survey of 

 Indiana, made during the year 1875. Pp. 601, 2 pis., 4 maps in 

 pocket. 8vo. Indianapolis. 

 Yigo County consists of Carboniferous rocks, and Huntington County 

 of Niagara Beds, both more or less concealed by Quaternary deposits. 

 Prof. L. Lesquereux describes and (except the third) figures 5 new 

 Coal-Measure plants — Paleojphycus Milleri, P. gracilis, P. divaricatus, 

 Asteropfiycus Goxii, and Conostichus ornatus (the last from Illinois). 

 Prof. W. W. Borden describes Jennings and Ripley Counties as com- 

 posed of U. and L. Silurian, with Devonian in the first. The Quaternary 

 deposits are of the Glacial, Champlain, and Recent epochs. Dr. M. N. 

 Elrod and Dr. E. S. Mclntire describe Orange County as wholly Carbo- 

 niferous and Quaternary. Prof. John CoUett describes Yanderburg, 

 Owen, Montgomery, and parts of Clay and Putnam Counties. Beside 

 superficial deposits there are Devonian rocks in Montgomery Co. only. 

 Carboniferous in all, and Triassic in Yanderburg Co. only. Sections, 

 lists of fossils, and analyses of coals, limestones, and mineral waters 

 are given abundantly throughout. "W. H. D. 



Creveau, Jules. Paux blocs erratiques de la Plata. [False Erratic 



Blocks of La Plata.] Bidl. JSoc. Qeol. France, 3 ser. t. iv. pp. 304- 



308, plate vii. 



The blocks, which occur in the Pampas and were pronounced to be 



of Glacial origin, are shown to be rounded rocks, more or less in place, 



and to partake of the nature of tors. G. A. L. 



Crosby, W. 0. Report on the Geological Map of Massachusetts. 



Pp. b2. 8vo. Boston. 

 Description of rocks coloured on the map. (See j9os^. Maps.) Account 

 of the geology of the Nashua Yalley, by L. S. Burbank, pp. 43-52. 



Ball, W. H. Harbors of Alaska and the Tides and Currents in their 

 vicinity. United States Coast Survey Report for 1875, Appendix 



The Shumagu Islands, S. of the Alaska Peninsula, are composed of 



