ORDER II 



CYCLOSTOMATA 



325 



Cryptoglena Marsson. Zoariuni adnate, tliick and unilaminar. Cretaceous. 



Ditaxia Hagw. {Polytaxia Haiuin). Zoarium erect, lamellar and frondose. 

 Cretaceous and Tertiary. 



Reticulipora d'Orb. (Retelea d'Orb.). Zoarium reticulated ; branches greatly- 

 compressed laterally. Cretaceous to Recent. 



Eeptomulticlausa, Multidausa d'Orl). Cretaceous. 



Terebellaria Lanix. Jurassic. Zonopora d'Orb. {Spiroclausa d'Orb.). Cretaceous, 



Suborder D. CERIOPORINA Hagenow (emend.). 



Von Hagenow in 1851 maintained the Cerioporina for Ceriopora and allied genera but 

 included a few other Cyclostoniata. Hannn in 1881 recognised the same name, limiting the 

 group, however, to the families Cerioporidae and Radioporidae. 

 The name is thus available for the post-Paleozoic Bryozoa 

 agreeing with the Trepostomata in having well - developed 

 immature and mature regions but differing in the amalgamated, 

 minutely porous structure of their walls. 



Family 14. Radioporidae Gregory. 



Zoccria simple or composite, discoid or massive, adhering 

 by more or less of the under surface. Zooecial apertures on 

 the upper surface, arranged in radial series separated hy 

 mesopores. , 



Discocavea d'Orb. (Fig. 456). Zoarium of simple 

 discoid groups, with apertures in radial uniserial lines. 

 Cretaceous to Eecent. 



Lichenopora Defrance (Figs. 457, 458) {Tecticavea and 

 Rculiocavea d'Orb.). Like Discocavea but apertures ar- 

 ranged in elliptical groups. Jurassic to Recent. 



Fio. 456. 



Discocavea pocillum d'Orb. Cre- 

 taceous ; France (after d'Orbigny). 



Fin. 457. 



Lichenopora(?)tu,huUfera(Roemei). 

 Oligocene ; Astrupp, Westphalia. 

 .4, Zoarium, i/l- -B, Cluster of 

 zo(ecial apertures, enlarged. 



Lidtcnopora stellata (Goldf.). Planer; Plauen, Saxony. A, 

 Zoarium, i/j. B, Same, enlai'ged. C, Vertical section of specimen 

 from Greeusand of Essen. 



Stellocavea d'Orb. {Garinifer Hamm). Zoaria discoidal, the upper surface 

 exhibiting the salient edges of numerous radially arranged plates, few of them 



