ORDER i CYCLOSTOMATA 261 



D'Orbigny, Haime, and others, restrict Stomatopora to the uniserial forms and classify 



c 



A ... . . I hicb. Utica Group; Cincinnati, <>. 



Zocecia,W/i. /:. >'. !njl"t". Hall. Loraine Group ; Cincinnati, 6/j. 0,8. 

 , fronton, Xii-h. Same locality. Portion of large zoarium, 

 '-' ! (after Ulrich). 



Fi... 413. 



pom ili'-l,i,ti,,n'i, Lamx. 

 sp. Great Oolite ; Kanvillf, 

 Calvadus. A, Zoarium, */! #, 

 same, enlarged. 



tin- multiserial as Proboscina, Andouin. Should the latter genus have to be withdrawn, 

 Ulrich would place the multiserial species with Berenicea. 



Berenicea, Lam. (Diastopora, Busk non Lam.), (Fig. 414). Zoaria forming thin, 

 discoid, flabellate, or irregular crusts upon foreign bodies. Zooecia arranged in 

 irregularly alternating lines. Rare in Ordovician, very abundant in Jura and 

 Cretaceous, less frequent in Tertiary and Recent. 



Discosparsa, d'Orb. Differs from Berenicea in having obconical or cup-shaped 

 zoaria, attached by centre of the base only. Cretaceous. 



Diastopora, Lam. (Mesenteripora, Blv.), (Fig. 415). Like Berenicea, except that the 



414. 



''iinm, Lamx. Great Oulit ; 

 Hanville, (.'alvados. .1, Vmuiu' i'X]>;m>i>i;i, 

 Vl- B, Same, enlarged (after Haime). 



Fio. 415. 



Unri'i, Ijunx. sp. Great Oolite ; 

 Ranvillc, Calvadus. .1, Frajrim-iit of zoarium, Vl- 

 l;, Enlarged portion of same. 



zoarium rises into broad, simple, or convoluted leaves, composed of two layers of 

 u riu grown back to back. Very abundant in the Jura, less common in Cretaceous 

 and Tertiary. 



Bidiastopora, d'Orb. Like Diastopora, but the zoaria forming only narrow, parallel- 

 edged branches. Cretaceous. 



Diastoporina, Ulrich, Ordovician ; Hederella and Hernodia, Hall, Devonian ; and 

 Reptaria, Rolle, Devonian. 



