Geology and Mineralogy. 159 



Partsehii, Harpes ungula, and others ; and there are as many from 

 expressed by M,'< ..', ,',., ,, _ „ 1 • ' tl _, ' , i il,< i ,t 1\ 



was subjected to the same general influences i'l pecics ur 



has describe. ! lias Ion- work d in 



Australian Geology. 



11. On the S,;eu;t;<> mountain* <,f Ditro, and the Trarhyti,; 

 ITargitta, near'jBMosch in Eastern Tr<r,,s> /Ira,, hi, tritl, ohsi-rra- 

 tio,,* on the {nrih-roos Dhtriets <>f Vor';,y„,to,{- <u„; Xayyag, 

 by Prof. G. vosr Rath. 55 pp. 8vo. Bonn, 1876.— The Syenitic 

 mountain-, ot Dm,,, d.s.uWd \>\ li.rf \ «ni U.ith. tUend from 

 GyergyoSzt. Miklos to Szarhegy and Ditro. having i em; h oi 



i ■■. ... 



rock consists ot , _,u to jrreenis -my n phcli ( t I vhite 



orthoclase and oligoclase, black hornblende with some l.iotne, 

 zircon, sphene, magnetite, and pyrite, and is either coarse or fine 

 grained. i In ela lit( is i, -rains ml isi i I iss s two 



thirds of an inch through. The miaseyte graduates into the 

 liti vie. or a rod _ »ul sol Una- in 



in addition to the ingredients A the mias- 

 eyte. The orthoclase of the ditroyte gave Prof, vom Rath the 

 oxygen ratio 1-018 : 3 : 11 438; and the blue sodahte was lound 



Si 38-66, Si 32-61, Ca 0-95, K 104, Na 13-28, Na 3-93, fl 2-36, CI 6-08. 

 In these mountains there is also a reddish quart/less syenyte-like 

 rock, consisting of a r .:><* biotite and horn- 



blende with some yellow sphene. 



Prof vom Rath describes in this paper also the trachytic rocks 

 of the vicinity and their relati. as, \ 



- ' ■"■■■ • ''• ■■ - " ■ 



e,l Xadj-ak). In the YOrospataK. region as 



. the gold-bearing rocks are: (!) the ( ar, ,.th,an 

 'andstone referred to the Eocene containing beds ot argillyte and 

 laving vertical ore-bearing veins ; (:>) U ldston -porphyry, which 

 md large dihexah' f a " p-rphyrkic sand- 



'tone newer than the Carpathian, which is iccompamed by a 

 irystalline slate, and sometimes becomes a breccia, and is inter- 

 acted by numerous small veins ,,; quart/ and pyrite. _ 



»" of Western Cornwall; 3. A 



