150 SPIROPORA. 



Entalopliora abbreviata, D'Orbigny, 1849, Prod. Pal. t. i. p. 318. 



,, ,, D'Orbigny, 1852, Pal. franc;. Terr. cret. t. v. p. 779. 



Pictet, 1857, Traite Pal. ed. 2, t. iv. p. 134. 

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



ser. 2, t. v. p. 195. 

 ,, ,, E. E. Deslongchamps, 1865, Jur. inf. Norm. : Mem. 



Soc. linn. Norm. t. xiv. p. 151. 

 ,, ,, Vine, 1883, 3rd Kep. Foss. Polyz. : Eep. Brit. Assoc. 



1882, p. 265. 

 ,, deslongchampsi, Ferry, 1862, Bajoc. Ma9on : Mem. Soc. linn. Norm. 



t. xii. p. 13. 

 ,, ,, Waagen, 1868, Zone Amm. sowerbyi: Geogn. Pal. 



Beitr. Bd. i. Ht. 3, p. 642. 



Pustulopora arborea, "Waagen, 1868, ibid. p. 640, pi. xxxii. fig. 8. 

 Spiropora ,, Friren, 1893, Bry. ool. inf. Metz: Bull. Soc. Hist. nat. 

 Metz, ser. 2, t. vi. p. 54. 



DIAGNOSIS : 



Zoarium tufted ; branches thick and short. 



Zocecia short. Peristomes well raised; quincuncially arranged, 

 the series being oblique and close together. 



DISTRIBUTION. 



Bathonian: Eanville, Calvados. 



Bajocian : near Ma9on, Saone-et-Loire ; Gingen, "Wiirtemberg ; 

 Plappeville, near Met/. 



Affinities. This species is not represented in the British Museum, 

 and I accept it on the evidence of Michelin's figure. It is allied 

 to S. ccespitosa, Lamx., by the arrangement of the peristomes, but 

 differs owing to the massiveness of its stems. It may be easily 

 distinguished from S. elegans, Lamx., and S. annulosa, Mich., as 

 the peristomes are not arranged in regular horizontal series. 



This species is represented in the Cretaceous by Spiropora 

 Irevissima (D'Orb.), 1 which may be a synonym. 



Ferry's S. deslongchampsi is shown by the description to have 

 the same characters as this species, having thick stems (3 mm. in 

 dia.), crowded rows of well-raised peristomes, and branching in 

 the same manner. 



Pal. fran9. Terr. cret. t. v. p. 794, pi. DCXXV. figs. 5-10. 



