200 Dr. J. W. Gregory — A Revision 



Distribution. — England: Inferior Oolite — Cornbrash. 

 Foreign: Bajocian, Germany; Bathonian, France. 



2. HapJocecia irregularis, sp. n. 



Diagnosis. — Zoarium composed of small cylindrical stems, 

 which dichotomize irregularly and usually at short intervals. 



Zooecia usually hexagonal, but occasionally heptagonal or 

 pentagonal, often irregular, irregularly quincuncial in arrange- 

 ment. Apertures large, circular, or, when worn, transversely 

 elongate. Front wall coarsely punctate. 



Distribution. — British : Great Oolite, Ancliff, near Bath ; 

 Lincolnshire Limestone, Stamford, Foreign : Bathonian, 

 Normandy. 



Affinities. — This species is separated from the former one 

 by the irregularly quincuncial arrangement of the zooecia. 



Genus 4. Ceriocava. 



Diagnosis. — Entalophoridse in which the zoarium consists 

 of thick massive stems, each of which is composed of a large 

 number of zooecia. The zooecia are funnel-shaped. The 

 apertures crowded. The peristomes flush. The axis of the 

 zoarium consists of fine zooecia, densely packed. Tlie outer 

 zone consists of zooecia which are usually reflexed and of 

 much greater diameter. 



Type species : Ceriocava corymbosa (Lamouroux), 1821. 



1. Ceriocava corymbosa (Lamouroux), 1821. 



Millepora corymhosa, Lamouroux, 1821, Expos, meth. p. 87, pi. Ixxxiii. 



iigs. 8, 9. 

 Non Ceriopora corymbosa, Michelin, 1846, Icon. Zooph. p. 246, pi. Ivii. 



%. 9. 

 Ceriocava coryinhosa, d'Orbigny, 1852, Pal. fran9., Terr. cret. t. v. 



p. 1016. 

 Heterojyora cory7nbosa, Haime, 1854, Bry. Jur., M4m. Soc. gt5ol. France, 



ser. 2, t. V. p. 212. 

 Certopo7-a Neptuni, d'Orbigny, 1849, op. cit. p. 324. 

 Ceriocava Neptuni, d'Orbigny, 1852, op. cit. p. 1016. 

 Ceriopora conifera (non Lamx.), Michelin, 1846, op. cit. p. 245, pi. Ivii. 



tig. 8. 

 Ceriopora dumetosa, Michelin, 1846, op. cit. p. 245, pi. Ivii. fig. 7. 

 Cava dumetosa, d'Orbigny, 1852, op. cit. t. v. p. 1019. 

 Cava piistulosa, Michelin, 1846, op. cit. p. 245, pi. Ivii. fig. 6. 

 Monticulipora pustulosa, d'Orbigny, 1849, Prod. Pal. t. i. p. 323. 

 Nodicava pustulosa, d'Orbigny, 1852, op. cit. t. v. p. 1014. 

 Hetero2}ora pustulosa, pars, Brauns, 1879, Bry. mittl. Jura, Metz, Zeit. 



deut. geol. Ges. Bd. xxxi. p. 336. 



