322 MOLLUSCOIDEA— BRYOZOA phylum v 



Actino'pora d'Orb, (Pavotuhigera, etc., d'Orb.) (Figs. 448, 449). Zoariiiin an 



Fig. 448. 



Actinopora diadema (Goldfuss). Upper 

 Cretaceous ; Maestricht. A, Zoarium, ^|■^. B, 

 Profile of same. C, Upper surface, enlarged. 



Fig. 449. 



Actinopora disticha (Hag.). 

 Upper Cretaceous ; France. 

 Upper surface, 8/j. 



Theonoa (?)i>aurantiuni M. Edw. 

 broken open in a vertical plane, Vi- 

 surface. 



adnate disk with apertiires opeiiing on ridges radiating from a central depression. 

 Cretaceous to Recent. 



MuUituhigera d'Orb. Zoarium Compound, tlie eleraents structurally resembling 

 confluent Actinoporae. Cretaceous. 



llieonoa Lamx. {Tilesia Lanix. ; Phyllofrancia Marsson) (Fig. 450). Zoarium 



massive or frondose ; surface 

 crossed by broad ridges bear- 

 ing the apertures. Jurassic 

 to Tertiary. 



Patenaria, Locularia 

 Hamm ; Retenoa Gregory. 

 Cretaceous. 



Family 8. Osculiporidae 

 Marsson. 



Zoarium ramose, cylindri- 

 Crag; Sussex. A, Zoariurn cal or adnate : zooßcia Simple, 



B, Enlarged portion of upper , ■ j. ji -n \i. 



^^ long, m bundles with the 

 apertures opening in Clusters 

 on the surface or sides of the 

 zoarium.. 



Filifascigera d'Orb, (Fig. 

 451). Zoarium of simple or 

 ])ranclied, creeping stolons. 

 Cretaceous and Tertiary. 



Lopholepis Hagw. Zoar- 

 ium a broad incrusting 

 sheet. Cretaceous. 



Cyrtopora Hagw. Semi- 

 cylindrical stems with pro- 

 minent Clusters of four or 

 more zooecial apertures open- 

 ing on all sides. Cretaceous 

 to Recent. 



Osculipora d'Orb. (Fig. 



452). Ramose, with Clusters 



obverse face of the branches. 



Fig. 451. 



Filifascigera megaera 

 Lonsd. Upper Cretace- 

 ous ; Vincentown, N.J. 

 Specimen seen from above 

 and from the side, i2/j 

 (after Ulrich). 



of zooecia opening 

 Cretaceous. 



Fig. 45-2 



Osculipora trun- 

 cata Hagw. Up- 

 per Cretaceous ; 

 Maestricht, Hol- 

 land. Fragment 

 i/i, and enlarged 

 (after Ulrich). 



Fig. 4öb, 



Truncatula repens 

 Hagw. Upper Cretace- 

 ous ; Maestricht. Lower 

 and Upper sides of zoa- 

 rium, enlarged (after 

 Hagenow). 



alternately on the sides of the 



