52 



BLANFOKD : GEOLOGY OF WESTERN SIND. 



the upper portion of the group, but the occasional interstratifications of 

 shales and clays often contain fragments of plants, 

 and some ill-marked impressions, probably due 

 to fucoids, have been found in the sandstones themselves. There ap- 

 pears a probability that these sandstones may be of fluviatile, and not 

 of mariue origin. 



In the limestones towards the base of the Nari group, many marine 

 fossils have been obtained, the following being some of the more 



important : — 



Gastebopoda. 



Natica patula. 



Terebellum obtusuvi, 

 Cypraa nasuta. 

 Vohitajuffosa. 

 Y. dentata. 

 Triton davidsoni. 



Corbula harpa. 

 Venus granosa. 

 Cardium triforme. 



JV. sigaretina. 

 Siliquaria granti. 

 Solarium affine. 

 Troclius cumulans, 

 JPhasianella oweni. 



Lamellibeanchiata. 



Pecten labadyei. 

 Ostrea flabellula. 



ECHINODEEMATA. 



Schizaster beloutchistanensis. 

 Eupatagtis rostratus. 

 Echinolampas, sp. 



Trochocyathus burnesi. 



Nummulites garansensis. 

 N. sublcevigata. 



Clypeaster profundus, 

 Ccdopleurus forbesi. 

 Cidaris verneuilli. 



Anthozoa. 



Montlivaultia vignei, 



FOEAMIJSTIFEEA. 



Orbitoides papyracea.- 



Although some species pass from the Khirthar, and even from the 

 Eanikot group, into the Nari beds, the fauna is chiefly distinct, and indi- 

 cates a higher horizon. The most marked change is perhaps in the Fora* 



( 52 ) 



