136 
DIASTOrORA. 
Char. — Zoarinm of dichotomous fronds with hi<,^h peristomes regularly arranged. 
Distrib. — Senonian — Maastrichtian : Ciply. 
4. foliacea (d’Orbigny), 1853 {non Lamx., 1821). 
Syx. Multisparsa foliacea, d’Orbigny, 1853-4. Br}'. Cret. p. 870, pi. 760, 
tigs. 10-20. 
Mesenteripnra ,, Pergens, 1890. Revision, p. 369. 
Char. — Multilamellar ; in broad lobed fronds. Peristomes somewhat prominent. 
Somewhat regular in distribution. 
Distrib. — Turonian : Rousseliere, Moutier, Charente. 
Aff. — T o be consistent with the adoj>tion of ReptomnUisparsa, the 
genus JIuItisparsa should be retained for this species ; but 
species of Diaatopora are so much less numerous than those of 
Jierenicea that little would be gained by the adoi)tion of this 
course. Should JlnWfiparsa not be retuined, and Mesenteripora 
be abandoned, this ‘ sj)ecies ’ must be I'cnamed. 
6. ? guilhardina (Leymerie), 1851. 
Syn. Eschara guilhardina, Leymerie, 18-51. Type PvTen. par. a Craie : Mem. 
Soc. gcol. France, ser. 2, vol. iv. p. 192, pi. ix. 
fig. 10. 
Char. — Zoarium of thick, bilamiuar, irregular fronds. Apertures large, 
regularly arranged, very crowded. 
Distrib. — Senonian — Maastrichtian : La Gesse, Colline de la Barade, Gensac, 
Tuc, etc., Haute-Garonue, in Calcaire a Orbitolites. 
6. laxipora (d’Orbigny), 1853. 
Syn. Mesentenpora laxipora, d’Orbigny, 1853-4. Bry. Cret. p. 812, pi. 756, 
tigs. 14-17. 
,, ,, Pergens, 1890. Revision, p. 369. 
Char. — Zoarium thin, hilaminar. Apertures small, widely scattered ; somewhat 
regularly arranged. 
Distrib. — Senonian — Maastrichtian : Royan, Charente-Inferieure. 
Coniacian ; Tours, Indre-et- Loire. 
Turonian ; Yillavard, Lavardiu, Troot, and Souge, Loir-et-Cher. 
7. lineata, Gabb & Horn, 1862. 
Syn. Biastopora lineata, Gabb &: Horn, 1862. Foss. Polyz. X. Amer. : Journ. 
Acad. Xat. Sci. Phil. ser. 2, vol. v. p. 172, pi. xxi. 
fig. 62 . 
Char. — Zoarium unilaminar, tubular. Peristomes low, subquiiicuncial in 
arrangement. 
Di.strib. — Turonian: Timber Creek and MuUica Hill, New Jersey. 
