406 
DITAXIA. 
DITAXIA, von Hagenow, 1851. 
Synonyms. 
Ceriopora^ pars, Goldfuss, 1827. 
Seteropora, pars, de Blainville, 1834. 
Polytaxia, Hamm, 1881. 
? Semicrescis, d’Orbigny, 1853. 
Mesenteripora, pars, Ubaghs, 1879. 
Diagnosis. 
Clausiclse with an erect, lamellar, frondose zoarium. 
Type Species. 
Cerioporaanomalo;pora,^Q\i\i'\\.%%, 1827. Maastiichtian : Maastricht. 
Ditaxia anomalopora (Goldfuss), 1827. 
Synonymy. 
Ceriopora anomalopora, Goldfuss, 1827. Petref. Germ. vol. i. p. 33, pi. x. 
figs, he, d (jHon a, h). 
Morreu, 1829. Cor. foss. Belg. : Ann. Acc. Groning. 
1829, p. 38. 
Kloden, 1834. Verst. Brand, p. 263. 
Ton Hagenow, 1839. Mon. Biig. : N. Jabrb. 1839, 
p. 282. 
Seteropora 
de Blainville, 1830. Zoopli. : Diet. Sci. nat. vol. lx. 
p. 382. 
>> 
de Blainville, 1834. Man. Act. p. 417. 
"Winkler, 1864. Mus. Teyl. : Cat. Pal. livr. ii. p. 208. 
Ditaxia 
von Hagenow, 1851. Bry. Maastr. Hr. p. 49, pi. iv. 
fig. 9. 
>5 
d’Orbigny, 1853-4. Bry. Cret. p. 953, pi. 775, figs. 7-15. 
n 
Pergens, 1890. Revision, p. 337. 
Polytaxia 
Hamm, 1881. Bry. mastr. Ob. -Sen. p. 41. 
Mesenteripora 
Staring, 1860. Bod. Xederl. vol. ii. p. 402. 
>> 
Ubagbs, 1879. Geol. Pal. Limbourg, p. 223. 
Diagnosis. 
Zoarium with 
very prominent zoarial lamina. It grows in 
broad 
sheets 
or dichotomous fronds. Apertures irregularly 
scattered ; large and circular. Dactylethrae usually in single 
series, but in places collected into large groups. Delow, the 
zooecia become polygonal and closed. 
