ORDER II 



CYCLOSTOMATA 



319 



Stomatopora Bronn {Alecto Lamx. non Leach) (Fig. 438). Zoaria delicate, adnate, 

 dicliotomously brandling. ZocEcia sub-tubular or elongate-ovate, arranged in a single 



Fio. 43S. 



Stomatopora diclwtoma (Lamx.). 

 GreatOolite; Ranville, Calvados. 

 A, Zoariuiu, Vl- }J, same, en- 

 larged. 



A, Corynotrypa Mkatula (James). Utica Group ; Cincinnati, Ohio. 

 Zooecia, iB/i. B, C. injlata (Hall). Lorraine Group ; Cincinnati, 6/1. 

 C, Probosciwi f random Nich. Lorraine Group ; Cincinnati, Oliio. Portion 

 of a large zoarium, 12/j (after Ulrich). 



series ; apertures sub-terminal, usually smaller tban the width of the cell. Ordovician, 

 Jura, Cretaceous, Tertiary and Recent. 



Corynotrypa Bassler {Stomatopora in part, auct.) (Fig. 439, A, B). Zoarium 

 unilinear, adnate, with short to elongate, clavate zoa3cia. Ordovician to Devonian. 



Prohoscvna Audouin (Fig. 439, G). Like Stomatopora but zoa'cia arranged in two 

 or more series. Ordovician, Mesozoic to Recent. 



Berenicca Lamx. {Diastopora Busk, non Lamx.) (Fig. 440). Zoaria forming thin, 

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

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

 Jura and Cretaceous, less frequent in Tertiary and Recent. 



Fig. 440. 



Bemiicea dlluviana Lamx. Great Oolite ; 

 Ranville, Calvados. A, Young expansion, 

 1/1. B, same, enlarged (after Haime). 



Fig. 441. 



Diastopora foUacca (Lamx.). Great Oolite ; 

 Ranville, Calvados. A, Fragment of zoarium, 

 1/1. B, Enlarged portion of same. 



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

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



Filispar sa d'Oih. Zoarium ramose, branches compressed dorso-frontally; apertures 

 irregularly disposed. Cretaceous to Recent. 



Diastopora Lamx. {Mesenteripora Blv.) (Fig. 441). Like Berenicea, except that 

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



