100 THE FOSSIL EOHINOIDEA OF WESTEEN SIND. 



Upper Chalk of the south of Hindostan and those of the deposits above the Cretaceous 

 in Sind. Yet there is a slight Cretaceous facies in the Eanikot Echinoid fauna ; but 

 the palseontological break is still vast. From our present knowledge, then, the Eanikot 

 series is the lowest in the Nummulitic group, and its fauna is a very special one. The 

 series is older than the Kach, Egyptian, and Southern Alpine groups of Echinoid- 

 bearing strata ; and these are more on the horizon of the succeeding Khirthar series. 



Position of the Fossil Echinoidea. 



The species which were described in the first part of this Monograph, pages 7-20, 

 were collected in strata containing Cardita Beaumonti and the Corals described in the 

 ' Palseontologia Indica,' ser. xiv. 1880. 



A trap covers the Cardita-Bemmonti strata; and hence the specimens have been 

 occasionally stated to have come " from beneath the Trap." But it appears that a second 

 trap (and possibly a third) exists in relation to these strata (see ' Memoirs of the 

 Geological Survey of India,' vol. xvii. pt. 1, " The Geology of Western Sind," by 

 W. T. Blanford, F.E.S., pages 129-134). 



The fact that a great depth of strata, not of marine origin, overlies the Cardita- 

 Beaumonti series, which in turn are overlain by the fossiliferous strata of the Eanikot 

 series, suffices to distinguish the age and position of the two sets of Echinoidea. 



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