288 
RADIOPORID^. 
E. hulbosa. They were both recorded from the same locality, 
Le Mans ; the two chief differences, the hemispherical form of 
lahyrintJiica contrasted with the cake-shaped form of hulhosa, and 
the more prominent pitting of lahyritithica, are probably both only 
individual differences. 
This specimen clearly shows that the C. lahyrinthica of Michelin 
is the same as the Radiopora lulhosa of d’Orbigny ; the zoarium 
consists of groups of mesopores, around which are bands of 
apertures of mature zooecia, and they are in many cases clearly 
radial in plan. 
60,366. A zoarium. The overgrowth of the upper part of the zoarium gives 
it a laminated appearance. The surface is marked by scattered 
depressions. Cenomanian — Gres Vert. Le Mans. Tesson Coll. 
4. Radiopora tuberculata, d’Orbigny, 1850. 
Synonymy. 
Padiopora tuberculata, d’Orbigny, 1850. Prod. Pal. vol. ii. p. 176. 
non ,, ,, Thomas «& Peron, 1893. Descr. Invert, foss. terr. cret. 
sud Tunisie, p. 342, pi. xxx. tigs. 7-13. 
Domopora ,, d’Orbigny, 1851. Bry. Cret. pi. 648, figs. 1-4. 
Semimulticavea tuberculata, d’Orbigny, 1853. Ibid. p. 980. 
? ,, {Madiopora) tuberculata, Keeping, 1883. Neoc. Foss. Upware, 
p. 138. 
Lichenopora tuberculata, Pergens, 1890. Rev. p. 383. 
Diagnosis. 
Zoarium massive and irregular, with large, blunt, irregularly 
scattered tubercles. Apertures in widely distant radial lines, 
with from four to six apertures in a line. 
Dimensions. 
D’Orbigny’s type. B.M. D. 3159. 
mm. V mm. 
Diameter of zoarium ... 21 x 31 ... 17 x 23 
Diameter of zocecial groups 3-5 . . . 3-5 
Diameter of aperture ... - — ... *15-* 2 
Figures. 
PI. lY. Fig. 8a. The surface of the zoarium ; nat. size. Fig. 85, 
part of the upper surface, where, owing to the tubercular elevations, 
the radial arrangement of the apertures is somewhat ill -developed; 
X 8 dia. Cambridge Greensand : Cambridge. D. 3159. 
