Yol. 52.] 



A DELIMITATION OF THE CENOMANIAN. 



159 



Sponges. 



Elasmostoma consobrinum , 



sp 



Trematocystia d' Orbignyi, Hinde 



„ siphonoides, Mich. 



Nematinion calyculatum 



sp. 



Hydrozoa. 



Porosphcera, sp 



? Genus (concentric layers) 

 ? Genus (tubular) 



ACTINOZOA. 



Micrabada coronula, Goldf. 

 Thamnastrma, sp 



EcHINODERMATA. 



Caratomus rostratus, Ag 



Catopygus columbarius, Lam 



Cidaris vesiculosa, Goldf. (test) 



sp. (spines) 



Codiopsis doma, Desm 



Cottaldia Benettice, Kcenig 



Discoidea cylindrica, Lam 



„ Favrina 



„ subucula, Klein 



Echinobrissus lacunosus, Goldf. 



Echinoconus castaneus, Brongn 



Echinocyphits difficilis, Ag 



Glyphocyphus radlatus, Hceningbaus 



Goniophorus lunulatus, Ag 



Hemiasier Morrisii, Forbes 



Holaster, sp 



Holaster Icevis, Deluc 



,, „ var. carinatus, Ag 



„ suborbicularis, Brongn 



„ suborbicidaris, Wright 



„ subglobosus, Leske 



Holectypus bistriatus, Wright 



Pseudodiadema Benettice, Forbes 



„ Brongniarti (?), Ag. . . 



„ Michelini, Ag 



„ ornatum, Goldf. 



,, variolar e, Brongn. 



Pygurus lampas, De la Beche 



Pyrina Icevis, Ag 



„ Desmoulinsii, D'Arcb 



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