152 Dr. J. W. Gregory — A Revision 



Genus Diastopora, Lamouroux, 1821 (emended). 



Diagnosis. — Tubuliporidse in which the zoarium is erect 

 and foliaceous. (The zoarium consists of simple fronds or 

 may be split up into multifid segments, or may grow in hemi- 

 spherical masses by the crumpling of the fronds, or may be 

 cylindrical, or may be reteporiform.) The zoarium is uni- 

 laminate or bilaminate. The zooecia are tubular. The peri- 

 stomes are flush or raised only a small proportion of the length 

 of the zooecia. The ocecia are closed, slightly enlarged zooecia. 



Type species: D. foliacea, Lamouroux. 



1. Diastopora foliacea, Lamouroux, 1821. 



Diastopora foliacea (pars), Lamouroux, 1821, Expos. nie"th. p. 42, 



pi. lxxiii. figs. 1, 2 (nou figs. 3, 4). 

 Eschar a foliacea, Bronn, 1835, Leth. Geogn. Bd. i. p. 241. 

 Elea foliacea, Brauns, 1879, Bry. mitt. Jura, Metz, Zeit. deut. geol. 



Ges. Bd. xxxi. p. 313, pi. vi. 

 Berenicea foliacea, Vine, 1880, Review Diastoporidse, Quart. Journ. 



Geol. Soc. vol. xxxvi. p. 357. 

 Diastopora Eudesiana, M. -Edwards, 1838, op. cit. p. 225, pi. xiv. fig. 1. 

 Bidiastopora Endesia, d'Orbigny, 1849, Prod. Pal. t. i. p. 317. 

 Mesenteripora Eudesia, d'Orbigny, 1852, Pal. franc., Terr. cr6t. t. v. 



p. 808. 

 Berenicea Eudesiana, Vine, 1880, Review Diastoporidae, Quart. Journ. 



Geol. Soc. vol. xxxvi. p. 357. 

 Bidiastopora rnceandrina, d'Orbigny, 1849, Prod. Pal. t. i. p. 289. 

 Diastopora mettensis, Haime, 1854, Bry. Jur., M6m. Soc. ge\>l. Erance, 



s6r. 2, t. v. p. 190, pi. viii. fig. 10. 

 Bidiastopora macropora, d'Orbignv, 1852, Pal. franc., Terr. cre"t. t. v. 



p. 799. 

 Diastopora macropora, Haime, 1854, op. cit. p. 191. 

 Diastopora petaloides, Waagen, Zone Amm. Sowerbyi, Geogn. Pal. 



Beitr. Bd. i. Heft 3, p. 645. 



Diagnosis. — Zoarium loose and open, the fronds being 

 generally broad, thin, and only slightly contorted; bi- 

 laminate. 



Zooecia visible throughout, the zooecia being long and 

 the apertures distant from one another and irregular in 

 arrangement ; the zooecia are regularly cylindrical. 



Peristomes well raised, giving a rough aspect to the 

 zoarium. 



Goncecia simple closed zooecia. 



Formula.— -2 3/rtO. 



Distribution. — British : Inferior Oolite — Cornbrash. 

 Foreign : Bajocian, Germany ; Bathonian, France. 



