264 MOLLUSCOIDEA—BRYOZOA SUB-KINGDOM V 
anastomosing. Zocecial apertures on one side only ; branches otherwise without pores. 
Cretaceous to Recent. 
Unicytis, VOrb. Like the preceding, except that the non-elevated portions of the 
surface of the branches are occupied by interstitial cells. Cretaceous. 

Fic. 423. 
Fia. 422. Fasciculipora incrassata, V’Orb. Upper 
Cretaceous ; Meudon, near Paris. Ter- 
Theonoa aurantium, M. Edw. Crag; Sussex. A, Zoarium broken minal fragment, nat. size and enlarged 
open in a vertical plane, 1/;. B, Enlarged portion of upper surface. (after d’Orbigny). 
Osculipora, VOrb. (Fig. 424). Differs from Frondipora in having the apertures in two 
alternating rows of more or less strongly project- 
ing clusters. Cretaceous. 
Truncatula, Hagw. (Fig. 425). Distinguished 
from Osculipora by having one face only covered 
with epitheca, the other (convex side) exhibit- 
ing numerous longitudinally arranged interstitial 
cells. Cretaceous, 
Desmeopora, Lonsd. (Semicytis, d’Orb.) ; Dis- 
cofascigera, VOrb. Cretaceous. 
Cyrtopora, Hagw. Sub-cylindrical stems 

Fig. 424. with prominent clusters of four or more zocecial 
Ganiara tie Fic. 425. apertures scattered over the entire surface. In- 
catu, Hagw. Up- Truncatula repens, terspaces smooth. Cretaceous to Recent. 
per Cretaceous ; Hagw. Upper Cretace- 
Maestricht, Hol- ous ; Maestricht. Lower Plethopora, Hagw. Clusters larger than in the 
land. Fragment, and upper sides of preceding, and the depressed interspaces occupied 
1/; and enlarged zoariun, enlarged (after - 
(after Ulrich). Hagenow). ‘ by small cells. Cretaceous. 
Family 7. Lichenoporidae. 
Zoaria simple or composite, discoid or massive, adhering by more or less of the under 
surface.  Zowcial apertures on the upper surface, arranged in radial series. Jura to 
Recent. 
Discocytis, VOrb. (Pelagia, Mich. non Lam. ; Bicavea, Radiocavea, VOrb.), (Figs. 426, 
427). Zoaria cup-shaped, obconical, or discoid, often pedunculate, poriferous on the under 
and outer sides. The concave upper side with a decidedly radial structure ; zocecial 
apertures scarcely distinguishable from pores on the sides of the zoarium. Cretaceous. 
Apsendesia, Lam. (Pelagia, Lam.; Defrancea, Bronn ; Radiofascigera, ete., VOrb. ; 
? Buskia, Reuss), (Figs. 428, 429). Zoaria simple or composite, discoid or lamelliform, 
attached by a peduncle or by the whole under surface. Interstitial cells wanting. 
Jura to Recent. 
Lichenopora, Defr. (Discocavea, Radiocavea, ete., VOrb. ; Stellipora, Hagw. non Hall; 

