150 
DIKXER : TRIAS OF TIIK HIMALAYAS. 
A large development of Upper Triassic rocks was disclosed in the 
highlands of the Pishin district (Baluchistan) by E. Vredenburg in 
19U1.' Monotis salinaria Schloth. and Halorites sp. ind. aff. suhcatenato 
Mojs. point to a noric age. The shales including those species are 
probably homotaxial with the Monotis beds of Spiti and certainly not 
older than the middle noric (alaunic) substage. 
From the Himalayas of Nepal our knowledge of Triassic fossils is 
limited to a valve of Halohia comparable to H. Charleyana Mojs. 
and to the cast of a Ptychites belonging to the section rugiferi, both 
of them represented in Wallich's collections from Muktinath, on the 
upper part of the river Kali or Buria Gandak, and south of Lob 
Mantang. A description of those scanty materials has been given 
recently by F. R. Cowper Reed. - 
In Tonking the presence of the carnic stage has been established 
by Diener, who discovered Juvavites tonkmensis Dien., one of the 
species of the julic beds with Halohia comata in the Bambanag section, 
among the materials brought from the source of the Red river by 
French officers. ' A wide distribution of Triassic rocks has been recorded 
recently by Zeil, Lantenois, Camillon, Mansuy/ in the environs of 
Lang-son and Binn-Lieuh. The fossils, which have been described 
by H. Mansuy,^ indicate the presence of Lower, Middle and Upper 
Triassic horizons. 
The Trias of Tonking consists of shales, sandstones and limestones, 
which have been folded very strongly. Xenodiscus cf. lissarensis Dien. 
and Pseudomonotis Grieshaclii Bittn. are referable to the Lower Trias, 
perhaps to its lowest stage, the Otoceras beds. The occurrence of 
Inyoites cf. Oweni Hyatt et Smith and of an ammonite, which has 
1 E. Vredenburg : On the occurrence of a species of Halorites in the Trias of 
Baluchistan. Records, Geol. Svrv. of India, 1904, Vol. XXXI, p. 162. — C. Diener : 
Notes on an Upper Triassic fauna from the Pisliin district, Baluchistan, ibidem, 
1906, XXXIV, p. 12. 
2 F. R. Cowper Reed : Fossils from Nepal, G'eol. Magazine, Dec. V, New ser., 
Vol. V, 1908, p. 261. 
3 C. Diener : Note sur deux especes d' Ammonites triassi(iues du Tonkin, Bnll. 
Sac. Geol. de France, 3 ser., T. XXIV, p. 882. 
* G. Zeill, H. Lantenois, R. de Laniothe : Contribution a I't-tude geologique 
del'Indochine, Mem. Soc. Geol, IV ser., T.I., 1907, Mem. No. 4, p. 24- 
^ H. Mansuy : Contribution geologique a la carte de V Indochirif., Paleontologie. 
Hanoi 1908, pp. 62-73. 
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