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 niultifid segments, or may grow in hemi- 

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

 C}lindrical, or may be reteporiform.) Tlie 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. folincea, Lamouroux. 



1. Diastopoj'a foliacea^ Lamouroux, 1821. 



Dj'astopora fuliacea (pars), Lamouroux, 1821, Expos. m(5th. p. 42, 



pi. Ixxiii. fig's. 1, 2 (non fifrs. 8, 4). 

 JEschara foliacea,'BrQnn, 1835, Leth. Geogn. Bd. i. p. 241. 

 JEleafoh'acea, Brauns, 1879, Bry. mitt. Jura, Metz, Zeit. deut. geol. 



Ges. Bd. xxxi. p. 318, pi. vi. 

 Berenicea fuliacea, Vine, 1880, Review Diastoporidas, Quart. Journ. 



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

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

 Bidiastopora Eiidesia, d'Orbigu}', 1849, Prod. Pal. t. i. p. 317. 

 Mesenteripora Eudesia, d'Orbigny, 1852, Pal. frany., Terr. cr^t. t. v. 



p. 808. 

 Berenicea Eudesiana, Vine, 1880, Eeview Diastoporidse, Quart. Journ. 



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

 Bidiastojmra mmmdrina, d'Urbigny, 1849, Prod. Pal. t. i. p. 289. 

 Diastopora mettevsis, Haime, 1854, Bry. Jur., Mem. Soc. g^ol. France, 



s6r. 2, t, V. p. 190, pi. viii. tig. 10. 

 Bidiastnpora macropora, d'Orbigny, 1852, Pal. fran^., Terr. cr^t. t. v. 



p. 799. 

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

 Diastopora petaloides, Waagen, Zone Amm. Sowerhyi, 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. 



Zocecia 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. 



Gonoecia simple closed zooecia. 



Formula. — 2 3/r i 0. 



Distribution. — British : Inferior Oolite — Cornbrash. 

 Foreign : Bajocian, Germany ; Bathonian, France. 



