146 SPIROPORA. 



has assigned a great range of variation to his species ; if all his 

 synonyms are to be included within one species, it varied far more 

 than did its Jurassic representative. Marsson goes further than 

 D'Orbigny, and reduces S. antiqua to a synonym of S. verticillata. 

 The greater thinness of the tufts seems to characterize the Cre- 

 taceous specimens, and may enable this series to be kept distinct. 

 Otherwise they must be included within S. elegans. 



LIST OF SPECIMENS. 



60173. Great Oolite. Near Bath. Etberidge Coll. Figd. PI. VIII. Fig. 4. 

 TD. 1936. ,, Richmond boring, 1205 ft. Presented by Prof. J. W. 



Judd, C.B., F.R.S. Small fragment, probably of this species. 

 60223. Bathonian Calcaire a polypiers. Ranville. Tesson Coll. 



B. 4516. (Six fragments.) Bathonian. ,, ,, 



60227. (Illustrates variations in distances of peristomal circles.) Bathonian. 



Ranville. Tesson Coll. 



46785, 60226. Bathonian. Ranville. Tesson Coll. 

 B. 179. ,, ,, Presented by B. Bright, Esq. 



D. 2095. Loc.? 



2. Spiropora ammlosa (Michelin), 1847. 



SYNONYMY : 



Cricopora annulosa, Michelin, 1847, Icon. Zooph. p. 339, pi. Ivi. fig. 3. 

 ,, ,, M'Coy, 1848, New Mesoz. Rad. : Ann. Mag. Nat. Hist. 



ser. 2, vol. ii. p. 419. 



,, M'Coy, 1854, Contrib. Brit. Pal. p. 66. 



Spiropora ,, Gregory, 1896, Rev. pt. v. : Ann. Mag. Nat. Hist. ser. 6, 



vol. xvii. p. 197. 



Cricopora verticillata, non Goldf., Michelin, 1846, op. cit. p. 236, pi. Ivi. fig. 3. 

 , non Goldf., Bronn, 1848, Nomencl. p. 348. 

 ,, ,, non Goldf., Bronn, 1849, Enum. p. 140. 



? non Goldf., Reuss, 1847, Foss. Polyp. Wien. Tert. : 



Naturw. Abh. Bd. ii. p. 40. 



LaterotuUgera ,, D'Orbigny, 1852, Pal. fran9- Terr. cret. t. v. p. 715. 

 Cricopora subverticillata, D'Orbigny, 1849, Prod. Pal. t. i. p. 318. 

 ,, tessonis, Michelin, 1846, Icon. Zooph. p. 236, pi. Ivi. fig. 6. 

 ,, ,, M'Coy, 1848, New Mesoz. Rad.: Ann. Mag. Nat. Hist. 



ser. 2, vol. ii. p. 419. 



,, Bronn, 1848, Nomencl. p. 348. 



,, ,, Bronn, 1849, Enum. p. 140. 



,, Buvignier, 1852, Stat. geol. dep. Meuse, p. 224. 



