liiDIAN TRIAS Sic PROVlfJCE, 
153 
Rotti is tlic classical locality in the Malay Airli ipelago, fi'oiii which 
the first Triassic fossils were described in 1892 by Rothj)letz. He 
distinguished a lower limestone and marl of carnic and a younger 
reddish-yellow limestone of noric age. This classification has been 
proved to ba entirely correct, although a revision of the fossils by Renz' 
and Wanner '■ has led to some alterations in the determination of the 
species. 
The leading fossils of the lower or carnic horizon are Daonella Wich- 
manni Rothpl. and D. styriaca Mojs. In the upper or noric horizon 
Pseudomonotis ocholicn var. densistriata Tell, predominates. Halobia cf. 
Hoernesi Mojs., H. cf. norica Mojs., H. cf. lineata Muenst. point also 
to a probably noric age, but have not been found associated with the 
casts of Pseudo»ionotis ocJiotica, according to Rothpletz. 
In Sumatra W. Voltz ' has acquainted us with a rich development 
of the carnic stage near the source of the Kwalu river. The Triassic 
beds consist of a yellow clay, about 600 feet in thickness, which is over- 
laid conformably by a series of sandstones, the average thickness of which 
amounts to 1,600 feet. In the sandstones thin bands of grey clay are 
intercalated irregularly. They contain casts of bivalves and numerous 
plant remains. This development has been compared with the coal- 
bearing Trias in the Afghan province of Herat by F. Noetling. 
The yellow shaly clay at the base of the Kwalu sandstone has yielded 
Daonella styriaca Mojs. and D. cassiana Mojs. From tiie grey clav 
intercalated with, the sandstone one species of Daonella and four of 
Halobia have been quoted by Voltz. All of them are new species, with 
the exception of a Halobia: which is probably identical with the Alpine 
H. Charlyana Mojs. From this fauna the carnic age of the entire 
series is evident. 
From Kendai, in south-eastern Borneo, crumbling shales, rich in 
casts of Monotis salinaria Schloth., have been quoted by F. Vogel.' 
1 C Renz : Timor und Rotti in Noetling, Asiatiscke Trias, ). c, p. 211, ■ — Ueber 
Halobia und Daonella aiis Grieclicnland nehst asiatisclien Vergleichstuecken, 
Neues Jahrb. f. Min. etc., 1906, I, p. 37- 
~ T. Wanner : Triaspetiefakten der Molukken und des TimoiarcJiipeLs, in G. 
Boehm, (^eologische M'tteilungen aus deni Indo-austral. Archipel, Neues Jahrh. 
j. Min. etc., Beilagebd. XXIV, 1907. 
^ W. Voltz : Beitrsege zur geol. Kenntni.s.s von Nord Sumatra, Zeitschr. Deutsch, 
Geol. Ges., LI, pp. 1-61. 
F. Vogel : Beitr»ge zur Kenntnis der mesozoischen Formationen in Borneu, 
Sammlgn, d. Geol. Reichsmuseums in Leiden, ser. I, Bd. VII, 1902, p. 217. 
( ) 
