322 MOLLUSCOIDEA— BRYOZOA phylum v 



Acti%iopora d'Oib. (Pavotubigera, etc., d'Orb.) (Figs. 448, 449). Zoariuiii an 



Pig. 44S. 



Actinopora liiadema (Goldfu.ss). 

 etaceous ; Mi 

 Profile of same. 



Upper 



B, 



C, Upper surface, enlarged. 



FiQ. 449. 



Actinopora disticha (Hag.). 

 Upper Cretaceous ; Prance. 

 Upper surface, ^li. 



Theonoa, Lamx. {Tilesia Lamx. 



aclnate disk witli apertures opening on ridges radiating from a central depression. 

 Cretaceous to Recent. 



Multitubigera d'Orb. Zoariuni compound, the elements structurally resembling 

 confluent Actinoporae. Cretaceous. 



Phyllofrancia Marsson) (Fig. 450). Zoarium 

 massive or frondose ; surface 

 crossed by broad ridges bear- 

 ing the apertures. Jurassic 

 to Tertiary. 



Patenaria, Locularia 

 Hamm ; Betenoa Gregory. 

 Cretaceous. 



Family 8. Osculiporidae 

 Marsson, 



Fio. 450. 

 M. Edw. Crag ; 



Theonoa {?)(> aiirantlmn 

 broken open in a vertical plane, Vi- 

 surface. 



Sussex. .4, Zoariuni 

 li, Enlarged portion of ujiper 



Zoarium ramose, cylindri- 

 cal or adnate ; zomcia simple, 

 long, in bundles with the 

 apertures opening in clusters 

 on the surface or sides of the 

 zoarium. 



Filifascigera d'Orlj. (Fig. 

 451). Zoarium of simple or 

 Ijranched, 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 zofficial apertures open- 

 ins on all sides. Cretaceous 

 to Recent. 



Osculipora d'Orb. (Fig. 

 452). Ramose, with clusters 

 of zocecia opening alternately on the sides of the obverse face of the branches. 

 Cretaceous. 



Fig. 451. 



Filifasciijera mcgaera 

 Lonsd. Upper Cretace- 

 ous ; Vincentown, N.J. 

 Specimen seen from above 



and from the side 

 (after Ulrich). 



12 



Fig. 452. 



OsciiUpura tnin- 

 rata Hagw. Up- 

 per Cretaceous ; 

 Maestricht, Hol- 

 land. Fragment 

 Vi, and enlarged 

 (after Ulrich). 



Fig. 4oa. 



Trxincat ala re pens 

 Hagw. Upper Cretace- 

 ous ; Maestricht. Lower 

 and upper sides of zoa- 

 rium, enlarged (after 

 Hagenow). 



