OF WESTERN SIND. 7 



IV. Description of the Fossil Echinoidea from the Strata below the Trap in Sind. 



The Teansition Cketaceous Series. 



List of Species described. 



From the strata below the Trap containing Litharcea epithecata and Cardita 



JBeaumonti. 



Order ECHINOIDEA ENDOCYCLICA. 



Family CIDABIBJE. 

 Genus Cibaeis, Klein, 1734. 

 Cidaris lacryimJa., Duncan 8( Bladen. 



Order ECHINOIDEA EXOCTCLICA. 



Suborder ATELOSTOMATA. 



Family GASSIDULIDM. 



Genus novu/m Plesiolampas. 

 Plesiolampas elongata, Duncan <Sf Sladen. 



Genus EoHlNANTHcrs, Breynius, 1732. 

 Echinanthus pumilus, Duncan £{ Sladen. 



Family SPATANOIDJE. 



Genus Linthia, Merian, 1853. 

 Linthia Sindensis, Duncan Sf Sladen. 



The fossil Echinoidea collected by the Geological Survey of India from the beds 

 beneath the Trap and underlying the Nummulitic series were obtained from below 

 Jakhmari peak in the Laki range west of Amri and from Barki nala north of Eanikot, 

 also in the Laki range. 



None of the Echinoidea described by MM. d'Archiac and Jules Haime were 

 found in these strata below the Trap. 



Order ECHINOIDEA ENDOCYCLICA. 



Family CIBARIByE. 

 Genus CIDAEIS, Klein, 1734. 



Test circular, more or less depressed above and below. 



Ambulacral areas narrow, flexuous. Poriferous zones composed of simple pairs of 

 pores, non-conjugate, the dissepiment usually developing a more or less prominent 

 granuliform swelling. Interporiferous spaces narrow, bearing granules only. 



