596 REVIEWS 



Geological Relations and Some Fossils of South Georgia. By J. W. 



Gregory. Trans. Roy. Soc. Edin., L, 1915, pp. 817-22, pis. 2. 



The outcropping rocks are described as consisting of a metamorphic 



series of probable Ordovician or Silurian age and a series of marine 



Mesozoic rocks associated with volcanic tuffs. There is no evidence 



of Cenozoic volcanic activity, and the igneous rocks are not of distinctly 



Andean types. Suess believed that the Andes extended in a great 



horseshoe curve through South Georgia to the South Orkneys and 



Graham Land. 



H. R. B. 



The Jaw of the Piltdown Man. By Gerret S. Miller, Jr. Smith. 

 Misc. Coll., LXV, No. 12, 1915. Pp. 31, pis. 5. 



In 191 2 the right half of an apelike jaw, a portion of a human brain 

 case, and other human bone fragments were found in a gravel pit at 

 Piltdown, Sussex, England, associated with an interglacial (early 

 Third ?) fauna. Assuming that these remains represented parts of one 

 individual, Woodward established the genus Eoanthropus, characterized 

 by the combination in one skull of a human brain case and an ape- 

 like jaw. 



Miller now compares casts of these fragments with specimens of 

 Pongidae and Hominidae in the National Museum and finds that the 

 brain case shows fundamental characters not known except in the genus 

 Homo, while the other fragments show equally diagnostic features 

 hitherto unknown except among members of the genus Pan (chim- 

 panzees). For the Pleistocene species represented by Woodward's 

 Eoanthropus, Miller proposes the name Pan vetus. 



H. R. B. 



The Shinumo Quadrangle, Grand Canyon District, Arizona. By 



L. F. Noble. U.S. Geol. Surv., Bull. No. 549, 1914. Pp. 



100, pis. 18, fig. 1. 



This bulletin presents the results of a detailed study of the western 



part of the Kaibab division of the Grand Canyon. The section includes 



rocks of Archean, Algonkian, Cambrian, Mississippian, and Pennsyl- 



vanian age. The lower or Unkar group of the Grand Canyon Series 



(Algonkian), in particular, is treated in considerable detail. The map 



which accompanies the bulletin represents the first detailed mapping 



done in the Grand Canyon region. 



H. R. B. 



