60 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 6t 



RADIOFASCIGERA RAMOSA D'Orbigny, 1853 



Plate 6, fig. 10 



1853. Radiofasdgera ramosa D'Orbigny, Pal^ontologie francaise, Terrain Cre- 

 tac^, vol. 5, p. 682, pi. 783, figs. 17-19. 



The ovicell is a small capsule with limited outlines, absolutely 

 analogous in form and position with that of Actinopora and Multi- 

 tuhigera. It belongs, therefore, in the group Cytisidae but the 

 dimensions are smaller. The oeciostome, rarely visible, seems to be 

 a very minute perforation more or less terminal. 



According to D'Orbigny, the zoarium is formed of subcolonies of 

 Actinopora grouped in cylindrical branches. In reality the colonies 

 are more often claviform and never branched. The subcolonies are 

 rarely orbicular, but are generally incomplete and fiabelliform 

 (Pavotuhigera) . 



In transverse sections the tubes are polygonal, with adjacent 

 walls. In longitudinal sections the tubes are cylindrical, with dor- 

 sal gemmation. It is difficult to decipher the subcolonies exteriorily 

 visible. 



D'Orbigny's figures are clearly diagrammatic. The zoaria are 

 very irregular and become almost massive when they become greatly 

 enlarged at their extremity. The multiserial fascicles are a great 

 deal shorter than in Actinopora stellata Koch and Dunker, 1847, and 

 Multitubigera cam.piclieana D'Orbigny, 1853. For these various rea- 

 sons we believe that the genus Radiofasdgera D'Orbigny, 1853, can 

 be maintained at least provisionally. 



Occurrence. — Lower Cretaceous (Valangian) : Sainte-Croix (Vaud), 

 Switzerland. 



Plesiotypes.—Qsii. No. 69908, U.S.N.M. 



Genus MULTIFASCIGERA D'Orbigny, 1853 



1853. Multifascigera D'Orbigny, Pal6ontoIogie frangaise, Terrain Cretace, vol. 

 5, p. 687. 



Theonoidae composed of superposed lamellae, each formed of sub- 

 colonies in the Actinopora and Lopholepis growth stages. 



Genotype. — Multifascigera campicJieana D'Orbigny, 1853. Cre- 

 taceous. 



MULTIFASCIGERA CAMPICHEANA D'Orbigny, 1853 



Plate 6, fig. 9 



1853. Multifascigera campicheana D'Orbigny, Pal^ontologie frangaise, Terrain 

 Cr6tac6, vol. 5, p. 688, pi. 762, figs. 7. 9. 



This species is very remarkable in its structure and the size that 

 it attains — 6 centimeters in diameter. The zoarium is formed of 



