ORDER V 



EUECHINOIDEA SPATANGOIDEA 



247 



postero-lateral shorter than the others, with elongate, conjugated pores. 

 Periproct supra-marginal ; apical system eccentric in front. 

 Broad subanal fasciole. Abundant in Middle and Upper 

 Cretaceous ; less common in Eocene and Miocene. 



/;/ V'.SSMS, Klein (Brissomorpha, Laube) ; Meoma, Gray ; 

 Metalia, Gray. Tertiary and Recent. lihinobrissus, A. Ag. 

 Recent. 



Brissopsis, Ag. (Deakia, Pavay), (Fig. 402). Ami 

 unr<|ual, bare and large near the peristome. Anterior 

 .linl slightly sunken, with small pairs of close pores. Flo m 



Paired .////// sunken, the antero-lateral pair sub -petaloid, 

 equal to or larger than the postero-lateral, straight or L 

 curved. A subanal and peripetalous fasciole. Tertiary and Recent. 

 Sub-genus Cyclastcr, Cotteau. Antero-lateral ^i&jlivergent. Eocene. 



Brissopatagus, Cotteau. Allied to Brissopsis. Eocene. 



Spatiiii;tnti, Klein. Anterior Anil in a broad, deep groove, with distant 





Fio. 401. 

 , Goldf. White Chalk ; Meudon, near Paris. Natural size. 



pairs of small pores. Paired Ami petaloid, with broad, sunken poriferous 

 zones. Periproct large, supra-marginal, transverse. lAml 

 with large crenulate and perforate primary tubercles, and 

 fine granulation. Subanal fasciole only. Tertiary and 

 Recent. 



Maretia, Gray. Tertiary and Recent. 



Eupatagus, Ag. Anterior Ami in a shallow, abactinal 

 depression, narrow, and with small, distant pairs of pores. 

 The paired Ami petaloid dorsally, long, wide, closed ; por- 

 iferous zones broad, more or less sunken ; pores dissimilar. 

 lyrifera, Peripetalous and subanal fasciole. Tertiary and recent. 



rnla^ed (alSrLovenr"' Sub-genus Macropneustes, Ag. (Peripneustes, Cott.), (Fig. 402 bis). 

 Test large, thick, cordiform. Petals elongate or broad, grooved or 



semi -Hush, open or imperfectly closed. Poriferous zones of equal width with the inter- 

 poriferous. Eocene and Recent. 



Gualtieria, Desor. Eocene. Echinocardium, Gray ; Breynia, Desor ; Lovenia, 

 Ag. and Desor. Tertiary and Recent. 

 I 



