98 BEBENICEA. 



Diastopora ventricosa, Vine, 1884, 4th Rep. Foss. Polyz. : ibid. 1883, p. 187. 

 ,, Vine, 1887, Jur. Polyz. Northptn. : Journ. Northptn. Nat. 



Hist. Field Club, vol. iv. p. 205, pi. i. figs. 6-8. 

 Berenicea oolitica, Vine, 1881, op. cit. p. 386, pi. xix. figs. 11-14. 

 Diastopora ,, Vine, 1882, op. cit. p. 245, figs. 4-7. 



,, ,, Walford, 1883, Relation Northptn. Sd. : Quart. Journ. 



Geol. Soc. vol. xxxix. p. 239. 

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



1882, p. 264. 



,, ,, Vine, 1884, 4th Rep. Foss. Polyz. : ibid. 1883, p. 187. 



,, ,, Vine, 1887, op. cit. p. 205, pi. i. figs. 3-5. 



,, Wilson and Crick, 1S89, Lias Tilton: Geol Mag. dec. 3, 



vol. vi. p. 342. 



DIAGNOSIS : 



Zoarium discoid : a thin sheet. 



Zocecia not visible throughout their whole length. Long ; 

 cylindrical. 



Peristomes well raised ; crowded at the margins ; more distant 

 in the middle ; irregularly arranged. 



Gonocysts large, pyriform ; closed sacs, which bulge out above 

 the general level of the zoarium; disposed somewhat irregularly. 



Formula. p, c, I, r = 1, 0, 2, di. 



Description of Figures. PL IV. Fig. 1. Part of a zoarium 

 with gonocyst, growing on root of Apiocrinus, X 6 dia. 

 Bradford Clay : Bradford, Wilts. J. Sharp Coll. 51342. (With 

 whole zoarium, nat. size.) 



PL IV. Fig. 2. Zoarium with gonocysts, encrusting Ostrea, sp., 

 X 7 dia. Cornbrash : Thrapston. Vine Coll. D. 919. 



PL IV. Fig. 3. Zoarium without gonocysts, on Nucleolites 

 orlicularis (Phil.), X 11 dia. Vine Coll. D. 920. 



DISTRIBUTION. 



ENGLAND : 



Oxford Clay : St. Ives, on Gryphea dilatata (Cambridge Museum). 



Cornbrash: Bedford. 



Bradford Clay : Bradford. 



Great Oolite : Blisworth. 



Inferior Oolite : Coombe Hill (fide Walford). 



Mid. Lias : Ilminster. 



Marlstone : Tilton, Leicestershire (fide Wilson and Crick). 



FOREIGN : 

 Sequanian Weisser Jura, : Lochen, Wiirtemberg. 



