138 
DIASTOPORA. 
Char. — Zoarium of broad, open, irregular tubes ; closely allied to B. iubulus, 
but svith more crowded zooecia. 
Distrir. — Senonian — Campanian — Zone of Micraster glyphm : Montbre, near 
Eeims. 
13. ? royana (d’Orbigny), 1851. 
Syn. Bidiastopora royana, d’Orbigny, 1851. Bry. Cret. pi. 627, figs. 1-4. 
,, ,, Pergens k Meunier, 1886. Bry. gar. Faxe: Ann. 
Soc. mal. Beige, vol. xxi. p. 206. 
Char. — Compressed dichotomous branches, with small zooecia on the broad 
surfaces and much larger zooecia along the edges. 
Distrib. — Danian : Faxoe. 
Senonian — Maastrichtian : Boyan. 
Aff. — T he characters of the lateral zooecia render the genenc 
position doubtful. 
14. ? scobina (Leymerie), 1851. 
Syn. Adeone scobina, Leymerie, 1851. Type Pyren. par. a Craie: Mem. Soc. 
geol. France, ser. 2, vol. iv. p. 191, pi. ii. fig. 6. 
Char. — Zoarium of dichotomous, parallel -sided, bilaminar fronds. Apertures 
distant, arranged in a regular quincunx. 
Distrib. — Senonian — Maastrichtian; Gensac, Haute- Garonne, in Calcaire a 
Orbitohtes. 
15. ? subreniformis, Marsson, 1887. 
Syn. Biastopora subreniformis, Marsson, 1887. Bry. Biig. : Pal. Abh. vol. iv. 
p. IK, pi. i. fig. 2. 
Char. — An erect, unilaminar, reniform zoarium, rising from a short narrow stem ; 
reflexed on the upper margin. Apertures distant over most of the zoarium, 
but crowded at the margin. 
Distrib. — Senonian — Mucronatenkreide : Eiigen. 
16. tubulosa, d’Orbigny, 1850. 
Syn. Biastopora tubulosa, d’Orbigny, 1850. Prod Pal. vol. ii. p. 86. 
,, ,, d’Orbigny, 1851. Bry. Cret. pi. 635, figs. 1-3. 
,, ,, d’Orbigny, 1854. Ibid. p. 827. 
,, ,, pars, Pergens, 1890. Eevision, p. 333. 
,, ,, Pergens, 1893. Bry. St. Pat. : Bull. Soc. beige 
Geol. vol. vi., Proc. verb. p. 204. 
,, megapora, d’Orbigny, 1850. Prod. Pal. vol. ii. p. 86. 
,, ,, d’Orbigny, 1851. Bry. Cret. pi. 635, figs. 4, b: 
Berenicea ,, d’Orbigny, 1854. Ibid. p. 863. 
Char. — Zoarium tubular, rising from a broad basal expansion. Peristomes 
very high. 
