598 NORTH AMERICAN INDEX FOSSILS. 



XXVIIL Cardiaster Forbes. 

 Similar to Holaster, but anterior groove deeper and with angular 

 margin. Anal opening oval, placed in a depression in the truncate 

 posterior face. A more or less complete marginal fasciole present, 

 passing beneath the anal opening. Cretacic. 



42. C. cinctus Morton. (Fig. 193 1, ^-/j.) Cretacic. 



Test cordate. Anal opening oval, situated on the truncated pos- 

 terior face. 



Middle marl bed of New Jersey. 



XXIX. Epiaster d'Orbigny. {Macr aster Roemer.) 

 Test heart-shaped, longer than broad. Anterior ambulacrum 

 in a groove. Paired ambulacra petaloid dorsally, with elongate, 

 unequal pores. Interambulacra swollen dorsally. Mouth opening 



Fig. 1932. Epiaster ehgans, lower, lateral and upper views, X Yi- (Md. Survey.) 



transversely oval, swollen anteriorly and usually with projecting 

 lip. Anal opening longitudinal, situated above the lower posterior 

 margin. Comanchic. 



43. E. elegans (Shumard). (Fig. 1932.) Comanchic. 

 Large, flattened above and below. Anterior groove shallow. 



Posterior margin truncate. Apical disk small, compact. Anal 

 opening oval, on truncated posterior margin. 



Characteristic of Fort Worth limestone (Washita) of Texas. 



44. E. whitei Clark. (Fig. 1933, a-c.) Comanchic. 

 Small. Anal opening high on the posterior surface. 

 Washita of Texas. 



