132 
DIASTOPOEA.. 
B. tuhulus is placed by Pergens as one of the synonyms of 
B. tubulosa, but its affinities seem rather with this species. Vine * 
records a Biastopora tuhulan, Entalophora form,” which suggests 
that he regarded this species as due to the hollowing out of an 
axial space in an Entalophora. 
LIST OF speci:mexs. 
British. 
D. 3075. A large irregular zoariura, ramifying through a lump of sand, with 
a fragment of the same, mounted on slide. Upper Greensand. 
? "Warminster. Toulmin Smith Coll. 
D. 3176. Two well - preserved fragments, with worn peristomes. Upper 
Greensand. Warminster. J. Brown Coll. 
Foreigx. 
D. 3706. Three fragments of zoaria. Cenomanian : Craie chloritee. 
Le Mans, Sarthe. Jesson Coll. 
D. 3707. Two fragments (on slide). Cenomanian: Craie chloritee. Le Mans, 
Sarthe. Jesson Coll. 
2. Diastopora compressa (Goldfuss), 1827. 
Stnoxymt. 
Ceriopora compressa, Goldfuss, 1827. Petref. Germ. p. 37, pi. xi. fig. 4. 
> > 
yy 
de Blainville, 1834. Man. Act. p. 414. 
Pohjtrema 
yy 
d’Orbigny, 1850. Prod. Pal. vol. ii. p. 279. 
Ditaxia 
yy 
von Hagenow, 1850. In Geinitz, Quadersandst. p. 24 
>> 
y y 
von Hagenow, 1851. Bry. Maastr. Kr. p. 50, pi. i 
fig. 10. 
Mesenteripora 
yy 
d’Orbigny, 1853-4. Bry. Cret. p. 811, pi. 75 
figs. 10-13. 
yy 
yy 
Staring, 1860. Bod. Nederl. vol. ii. p. 402. 
yy 
yy 
Winkler, 1864. Mus. Teyl. : Cat. Syst. Pal. InT. i 
p. 212. 
y y 
yy 
Hamm, 1881. Bry. mastr. Ob. -Sen. p. 25. 
y y 
y y 
Marsson, 1887. Bry. Riig. : Pal. Abh. vol. iv. p. 16. 
yy 
y y 
Pergens, 1890. Revision, pp. 368, 369. 
,, neocomiensis, d’Orbigny, 1853-4. Bry. Cret. p. 808, pi. 756, 
figs. 7-&. 
,, meandrina, Canu, 1897. Bry. Jan. : Bull. Soc. geol. Fr. ser. 3, 
vol. XXV. p. 153. 
,, ,, Canu, 1898. Bry. Cal. : ibid. p. 747. 
Dixgxosis. 
Zoarium of broad, thick, bilaminar fronds, slightly lobed at the 
margins ; the fronds are flat or slightly crumpled. 
1 Vine. Compl. Rep. : Rep. Brit. Assoc. 1892, p. 330. 
