OIlDKll V 



EUECHINOIDEA SPATAXGOIDA 



Cretaceous. Studeria, Duncan. Tertiary and Recent. Phyllobrissus, Cotteau. 

 Jura and Cretaceous. 



Cltf/H'Hx, Klein. Test large, low, nearly flat actinally. Ami wide, prtaloiM, 

 not closing dm-sally, narrow at the ambitus and actinally. Pairs of pores in 



' imms, Cott. Kiniiiieridgian ; Toniijt-sltcrj:, near H.-iimvcr. .1, /;, Dorsal and ventral 



trsi, f/4 natural size. C, Apical system, enlarged. /), Ainbulacral plate, magnified. 



the petaloid parts with the inner pore small and circular, the outer transversely 

 elongate, and in a long groove. Periproct high up, usually in a groove along 

 the median line of the posterior lAmb. Upper Jura. 



PyguruSj Ag. (Fig. 388). Test large, angular, rounded, or cordiform in 

 marginal contour; depressed or rather tall and sub -conical dorsally. Amb 



Echinolampns Kleini, Goldf. 



Oligocene ; Doberg, near Biinde. 



flush dorsally, unequal, long ; the petaloid parts contracting but not closing 

 marginally, and expanding again actinally, where the Amb are grooved. Peri- 

 proct infra-marginal, pyriform or ovoid, in a special area or rostrum close to 

 the posterior edge of the test. Upper Jura and Cretaceous. 



Echinolampas, Gray (Fig. 389). Test variable in size and shape, more or 

 less ovoid or circular at the tumid marginal outline ; tall and conical or 

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