Reviews — Brief Notices. 89 



10. Fossil Mammals from the Crimea. — In a memoir entitled 

 Mammiferes fosnles de Sebastopol (Mem. Comite Geologique, n.s., 

 livr. 87, Petrograd 1914) A. Borrissiak describes a mammalian 

 fauna of Middle Sarmatian age which in many respects is very 

 similar to the widely distributed fauna of the Pikermi type. The 

 most important new genus is Achtiaria, which is a member of the 

 Giraffidse and not very remote in structure from Samotherium and 

 Okapi: the dentition and some limb-bones are described. The author 

 also gives an account of new species of Tragoceros and Aceratherium 

 and of a new variety of Hipparion gracile. 



11. Indian Geological Terminology. — This is a list of terms used 

 by writers on Indian geology, now arranged in alphabetical order 

 by Holland & Tipper in the Memoirs of the Geological Survey of 

 India (vol. xliii, pt. i, 1913). It is modelled on the well-known 

 American publications of similar nature, and gives the general history 

 of the word and the present fixation of its meaning, if that meaning 

 has changed since the introduction of the term itself. 



12. In the Memoirs of the Geological Survey of India (vol. xli, pt. ii, 

 pp. 148-245, 1914) Dr. L. Leigh Fermor contributes an interesting 

 account of the geology and coal resources of Korea State, Central 

 Provinces. The geological formations represented are: 1, Deccan 

 Trap ; 2, Gondwana, {a) Supra-Barakars, (b) Barakars, (c) Talchirs ; 

 3, Archaean. The geology corresponds generally with the physical 

 division into three plateaux. The lowest, that of Patna and 

 Khargaon, is largely composed of rocks of the Talchir formation. 

 On it rest two outliers of the Barakar rocks, comprising the Kurasia 

 and Koneagarh Coal-fields, and these are outliers of the second or 

 Sanhat plateau. The third or Deogarh plateau corresponds with the 

 Supra-Barakar rocks. 



13. In the Records of the Geological Survey of India (vol. xliv, 

 pt. i, pp. 41-51, 1914), Dr. W. A. K. Christie describes a carbonaceous 

 aerolite which fell near Chabra, in the Native State of Tonk, 

 Pajputana, on January 22, 1911. The Tonk meteorite, as it is 

 called, is chiefly interesting on account of its highly carbonaceous 

 character, the chemical analysis showing it to contain no less than 

 2*70 per cent of carbon ; the composition of the carbonaceous matter 

 is uncertain. Under the microscope the stone appeared as a structure- 

 less, irregularly cracked mass, and, though no chrondritic structure 

 was apparent, it should be classed as K (coaly chrondrite) in Brezina's 

 classification. 



14. Mining Districts of the Dillon Quadrangle, Montana, and 



adjacent Areas. By Alexander N. "Winchell. United States 



Geological Survey, Bulletin 574. pp. 191, with 16 figures and 



8 plates. Washington, 1914. 



The region carefully described in this' memoir lies just south of 



Butte, and measures about 49 miles wide east to west and 60 miles 



long. Gold placer-mining dates back as far as 1852 and was 



wonderfully productive; by the present day the diggings have been 



worked out, but the life of placer-mining has been prolonged by 



dredging operations. At the same time the deep mines have proved 



