SEMIMULTICAVEA. 
243 
4. multistella, d’Oibigny, 1851. 
Syx. Radiopora multistella, d’Orbigny, 1851. Bry. Cret. pi. 649, figs. 5-7. 
Semimulticavea ,, d’Orbigny, 1853. Ibid. p. 981. 
Lichenopora {Semimulticavea) multistella, Pergens, 1890. Rev. p. 383. 
Char. — Zoarium a flat incrustation or expansion formed of many zocecial groups. 
The radial rows of apertures in each group are few in number (about eight) ; 
they are thick and highly raised, but each contains only a short row of three 
or four apertures. 
Distrib. — Cenomanian : Le Mans, France. 
6. pustulosa, d’Orbigny, 1850. 
Syx. Radiopora pustulosa, d’Orbigny, 1850. Prod. Pal. vol. ii. p. 176. 
,, ,, d’Orbigny, 1851, 1854. Bry. Cret. p. 994, pi. 649, 
figs. 1-4. 
,, ,, Bucaille, 1890. Bry. Cret. Seine- Inf. : Bull. Soc. 
Sci. nat. Rouen, vol. xxv. p. 508. 
non ,, ,, Vine, 1884. Cret. Lich. : Quart. Journ. Geol. Soc. 
vol. xl. p. 850, fig. 1, p. 851, and p. 852. 
non ,, ,, Vine, 1884. Fourth Report : Rep. Brit. Assoc. 1883, 
p. 170. 
Lichenopora {Radiopora) pustulosa, Pergens, 1890. Rev. p, 383. 
Char. — Zoarium a broad comparatively thin expansion of numerous zooecial 
groups. Each group has a large central depression in which the apertures 
are irregularly arranged ; from this area diverge radial rows of apertures ; 
there are about twenty-two to twenty-four radial rows, with from four to 
seven apertures in each. 
Distrib. — Cenomanian : Havre and lie Madame, France. 
6. reticulata, Hamm, 1881. 
Syx. Semimulticavea reticulata, Hamm, 1881. Bry. mastr. Ob. -Sen. i., Cycl. 
p. 41. 
Char. — Zoarium creeping. The single zooecial groups agree with those of 
Domopora reticulata. Hag. These stellate groups are not independent, but are 
developed in connection with one another. 
Distrib. — Senonian — Maastrichtian : Geulhem, Belgium. 
7. variabilis (Hennig), 1894. 
Syx. Keteroporella variabilis, Hennig, 1894. Bry. Sver. Krit. ii., Cycl.: 
Lunds Univ. Arsskrift, vol. xxx., Acta Physiogr. 
No. viii. p. 25, pi. ii. fig. 28. 
Char. — A small irregular zoarium which in the type-specimen is 5 mm. long by 
a little less than 2 mm. wide. It consists of three sub-colonies in a row. 
There are three or four apertures in each radial series. Apertures -06 in 
diameter. 
O 
Distrib. — Senonian — Campanian — Zone of Belemnit ella mucronata — Alms Sand- 
stone : Ahus, Sweden. 
