156 SPIROPOEA. 



Description of Figure. PL IX. Fig. 1. Part of a branch, 

 X 8 dia. Inferior Oolite. Loc. ? Presented by F. Harford, 

 Esq. B. 3829. 



^Affinities . This species may be readily distinguished from any 

 Jurassic species by the Idmoniiform arrangement of the peristomes. 

 It is the type species of Bisidmonea of D'Orbigny, and this may be 

 worthy of recognition as a subgenus. But there is only the one 

 species, and the Idmoniiform arrangement of the apertures is not 

 constant throughout the whole zoarium in the Museum specimens. 



LIST OF SPECIMENS. 



B. 3829. Inferior Oolite. Loc. ? Presented by F. Harford, Esq. Figd. 



PL IX. Fig. 1. 



60212-3. Bathonian Calcaire a polypiers. Eanville. Tesson Coll. 

 B. 210. Pres. by B. Bright, Esq. 



D. 2097. Tesson Coll. 



SPECIES INDETERMINABLE OR NOT REPRESENTED 

 IN COLLECTION. 



1. Spiropora diadema. 



Syn. Cricopora diadema, Huxley and Etheridge, 1865, Cat. Foss. M.P.G. 

 p. 223. 



Distribution. Inferior Oolite : England. 



2. Spiropora liassica, Tate, 1875. 



Syn. Spiropora liassica, Tate, 1875 : Geol. Mag. new ser. dec. 2, vol. ii. 



p. 205, fig. 1. 

 ,, ,, Vine, 1883, 3rd Rep. Foss. Polyz. : Rep. Brit. 



Assoc. 1882, p. 260. 



Entalophora ,, Vine, 1884, 4th Eep. Foss. Polyz. : Rep. Brit. 

 Assoc. 1883, p. 188. 



Distribution. Lias : England. 



3. Spiropora sarthacensis (D'Orbigny). 



Syn. Entalophora sarthacensis, D'Orbigny, 1849, Prod. Pal. t. i. p. 289. 

 Clausa ,, D'Orbigny, 1852, Pal. fran9. Terr. cret. 



t. v. p. 894. 

 ,, ,, Pictet, 1857, Traite Pal. ed. 2, t. iv. 



p. 140. 

 Spiropora ,, Haime, 1854, Bry. jurass. : Mem. Soc. 



geol. France, ser. 2, t. v. p. 198. 



t Entalophora bajocina, D'Orbigny, 1849, op. cit. i. i. p. 289. 

 ? ,, ,, D'Orbigny, 1852, op. cit. t. v. p. 779. 



