DIASTOPOEA. 
-131 
1. Diastopora escharoides, IMiclielin, 184.5. 
STX0>"nrr. 
Diastopoi'a escharoides, 1845. Icon. Zooph. p. 218, pi. liii. fig. 18. 
,, ,, d’Orbigny, 1850. Prod. Pal. vol. ii. p. 176. 
,, ,, d’Orbigny, 1851. Bry. Cret. pi. 636, figs. 3-5. 
,, ,, d’Orbigny, 1854. Ihid. p. 828. 
,, ,, Pergens, 1890. Revision, p. 336. 
non Entnlophorn Jistulata, d’Orbigny, 1851. Bry. Cret. pi. 619, figs. 13-15. 
Eiastopora tubuhis, d’Orbigny, 1851. Bry. Cret. pi. 641, figs, 9, 10. 
,, ,, d’Orbigny, 1853-4. Ibid. p. 829, pi. 758, fig. 13. 
? ,, ,, Staring, 1860. Bod. Xederl. vol. ii. p. 402. 
,, tubulosa, pars, Pergens, 1890. Revision, p. 333. 
,, pustulosa, pars, Hamm, 1881. Bry. mastr. Ober-Sen. p. 25. 
Diagnosis. 
Zoarium unilaminar, in wide, open, irregular tubes. Reverse 
face covered by wnnkled epi theca. 
Zooecia sboii; and rather stout ; apertures in somewhat regular 
series, and often iiTegularly quincuncial in arrangement. 
Peristomes low. 
Dimensions. 
D’Orbigny’s specimens 
{f de Pergens). 
Distance of apertures in same longitudinal series ... -04--06 mm.^ 
Diameter of zooecia -24 ,, 
Diameter of apertures ... ... ’12 ,, 
Distribution. 
England : 
Upper Greensand : Warminster. 
Foreign : 
Senonian — Maastricbtian : Meudon ; Fecamp; Sainte-Colombe ; Ciply; 
Roy an. 
Santonian : Pecine, Pons, Perignac. 
Coniacian: Tours, Joue, Luynes, etc. 
Turonian : Vendome, Les Roches, etc., Cher - et - Loir ; Merpins, 
Charente. 
Cenomanian ; Le Mans, Sarthe. 
Affinities. 
This ‘ species ’ is probably the Cretaceous form of JDiastopora 
lamouroux% Edw.,^ fi’om which it differs by having less raised 
peristomes, which are more regularly distributed. 
^ This figure is probably a misprint for *4 and -6 mm. 
^ M. Edwards. Mem. Cris. : Ann. Sci. nat., Zool., ser. 2, vol. ii. p. 225, 
pi. XV. fig. 2. 
