BEITISH PAL^OGENE BETOZOA. 251 



Species 1. Meniscopoea bigibbeka^. 



Syn. EscJiara brongniarti, Lonsdale, 1850 (non M.-Edw.)^ in Dixon, Geol. Suss. pp. 161, 162, 

 pi. i. fig. 9. 



Diagnosis. Zoarium erect, bilaminar ; forming large flat foliaceous expansions. 



Zooecia regularly quincuncial in arrangement. Surface plain. Shape pyriform. 

 Aperture large, semicircular, but with the lower margin somewhat curved outward. 

 The main part of the front wall is a raised triangular area ; at the upper part are two 

 prominent humps. The zooecia are separated by depressed furrows ; a line of large 

 round punctures occurs along the margin. 



Avicularia : one large marginal pair beside the lower corners of the aperture ; man- 

 dible pointing outwards. 



Distribution. Bracklesham Beds, Huntingbridge. 



T^pe. Brit. Mus. No. 49732. Edwards Coll. 



Figures. PI. XXXI. fig. 8. Part of the type from Huntingbridge. Fig. 9. Fragment 

 with gonoecium. 



Affinities of the Species. As this species was identified by Lonsdale with M.-Edwards's 

 Eschara Irongniarti it is necessary to compare the two : the fact that the English 

 species has the aperture wider than long, has two humps and a raised triangular 

 area of front wall, is quite sufiicient to distinguish them. M.-Edwards's figure [No. 2, 

 p. 335, pi. xi. fig. 9] leaves the generic position of his species quite uncertain ; but even 

 should it prove to be a Meniscopora, which is not probable, there need be no confusion 

 between the species. 



This species has a certain resemblance in general aspect to the Eschara fenestrata, 

 Eeuss [No. 1 1, p. 290, pi. xxxii. fig. 5], which Waters [No. I2, pp. 18, 19] regards as 

 a synonym of Lepralia hisulca (Eeuss) [No. 1 1, pp. 270, 271, pi. xxxii. fig. 10]; but 

 the latter has external ooecia. 



Family CELLEPOEID^. 



Genus Coneschakellina, D'Orbigny, 1851. 



[D'Orbigny, No 2, pp. 446, 447.] 

 Syn. Batopora, Eeuss ; Fedora, Jullien. 



Diagnosis. A genus of Celleporidse with a small, conical, hemispherical, or spherical 

 free zoarium ; uni- or multi-laminate. The zooecia are holostomatous ; the aperture is 

 usually on the highest part of the front wall, and is generally orbicular or clithridiate. 

 Ocecia large and globose ; comparatively rare. 



Distribution. Eecent. S. Atlantic, Australia. — i<bssiZ. Eocene: England. Oligocene; 

 Germany, Austria, Italy. Miocene : Austria, 



' /. e. two-humped, referring to the prominences on the front wall. 



VOL. siii. — PART VI. No. 5. — Jime, 1893. 2 o 



