ABSTRACTS: ZOOGEJOGRAPHY 533 



vision consists of andesite flows resting in places on the eroded edges 

 of the rhyoUtes. The uppermost subdivision consists of subangular 

 conglomerate overlain by basalt. 



The principal ore bodies consist of pyrite and chalcopyrite in a gangue 

 of pyroxene, garnet, and epidote. They are replacement deposits 

 of limestone developed along fault zones and are of the contact-meta- 

 morphic type. The primary ore is essentially unenriched by later 

 sulphides. The average tenor of the ore mined has ranged from 2 . 75 

 to 6 per cent of copper. A. K. 



ANTHROPOLOGY. — The Maya Indians of southern Yucatan and 

 northern British Honduras. Thomas W. F. Gann. Bull. Amer. 

 Ethnol. 64. Pp. 146, pis. 28, text figs. 84. 1918. 



The Maya Indians will always be noteworthy as those who attained 

 the highest cultural development in America, or at least in North 

 America. A study of the living representatives of that race or of 

 their antiquities is therefore doubly welcome and in the present bulle- 

 tin we have both; Part i being devoted to the "Customs, Ceremonies, 

 and Mode of Life" of the modern Maya and Part 2 to "Mound Ex- 

 cavation in the Eastern Maya Area." The former, covering 36 pages, 

 considers the habitat, personal characteristics — including the material 

 culture — and the social characteristics^including religion; the latter 

 contains a short description of the ancient inhabitants of the region as 

 revealed by studies of the mounds and objects found in them, but the 

 larger part of the section, and of the work itself, 84 pages, is devoted 

 to the archeological remains themselves. J. R. Swanton. 



« 



ZOOGEOGRAPHY.— Lt> zone investigations in Wyoming. MerriTT 

 Gary. N. Amer. Fauna 42: 1-95, pis. 15, figs. 17. 1918. 



This bulletin embodies the results of many years' exploration in Wy- 

 oming by the author and other members of the Biological Survey. 

 These investigations serve to emphasize the diversified character of the 

 physiography of Wyoming. Its chief characteristics are its many 

 mountain ranges, vast, open rolling plains, and deep-cut valleys due 

 to the numerous streams. The cHmate of the State is mainly arid, 

 the rainfall from 10 to 20 inches, with warm summers and cold win- 

 ters. As a consequence of these physiographic conditions the life 

 2ones of the State show remarkable diversity. Of the seven trans- 



