24 



PROCEEDINGS OF THE NATIONAL MUSEUM 



Affinities. — This new species differs from CWiopora ovoidea in its 

 larger aperture (0.12 mm. and not 0.10 mm,), in its zoarium broader 

 than high, and, in section, in the zooecial walls, which are thicker 

 and of different structure. 



Occurrence. — Lower Cretaceous (Velangian): Sainte-Croix (Vaud)^ 

 Switzerland (common). 



Cotypes.— Cat. No. 69864, U.S.N.M. 



CERIOPORA AEQUIPEDIS. new species, 



Plate 22, figs. 9-11 



Description. — The zoarium is irregularly hemispherical, generally 

 broader than high, with the base equal to the zoarial width. The 



orifices are polygonal and the 

 tubes are very thick. 



Measurements. — Diameter of 

 aperture, 0.12 mm.; maximum 

 zoarial diameter, 9 mm.; maxi- 

 mum zoarial height, 5 mm. 



Structure. — In meridian sec- 

 tion the tubes are long, cylindri- 

 cal; the walls are moniliform, 

 with large vesicles. The zonal 

 lines are numerous, very close to- 

 gether, and are transformed par- 

 tially into basal lamellae. 



Affinities. — Ceriopor a aequi- 

 pedis differs from C. angustipedis, 

 in which the diameter of the aper- 

 tures is ide ntical, in the hemi- 



FiG. 8— Ceriopora aequipedis, new species. Merid- SphcriCal ZOarial lOrm, m the Un- 

 ian section, X 10. Lower Cretaceous (Valangian): narrOWed baSC, and, in SCCtioUS, 

 Sainte-Croix, Switzerland • ,i -f c . -i 



in the moniliiorm tubes. 

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

 Switzerland (rare). 



Cotypes.—CRt. No. 69865, U.S.N.M. 



CERIOPORA SOLIDA, new specie 



Plate 22, figs. 6-8 



Descriptions. — The zoarium is free, massive, convex, with a flat or 

 concave base apparently covered by many enveloping lamellae. The 

 tubes have little thickness; the apertures are large, polygonal. 



Measurements. — Diameter of apertures, 0.1(5 mm.; zoarial width^ 

 15 mm.; zoarial height, 9 mm. 



Structure. — In meridian sections the tubes are long, sinuous; the 

 diaphragms are concave and numerous; the zooecial walls are little 



