398 Journal of the Asiatic Society of Bengal. [November,1913. 
Pleurotomaria afi. durga, Waag. 
Murchisonia, sp. 
This fauna is one in which Indian and Sumatran types are 
mixed and it is probably of the same age as that from Zwah- 
ga-byn hill. 
It is in every degree probable that similar limestones of 
anthracolithic age extend to the far south through the Malay 
Peninsula, and that the caves of that area are in identical 
formations ! 
In the state of Pahang (F. M. S.), an extensive calcareous 
series consisting chiefly of limestones exists. It has been termed 
the Raub Series by J. B. Serivenor who writes *:— 
The big limestone hills form a picturesque feature in 
the landscape wherever they occur, similar to those on 
the west of the Main Range. Gunong Sinyum, with its 
The caves found in the hills are as beautiful as caves 
elsewhere in limestone country, but present no special 
feature.’ 
other structures have been reported, as well as some fairly 
good remains of Cephalopoda which C. C. Crick believes belong 
to the genera Orthoceras 
Cyrioceras 
Gyroceras 
and Solenocheilus, 
rom Lubok Sukum imperfect casts and impressions have 
been obtained which Messrs. Newton and Crick think may be 
| Caves in the Malay Peninsula. Brit. Assoc. Repts.,1898, p- 571. 
. pe ee The Geology and Mining Industries of Ulu 
Pp 
