198 CERIOPORA. 



Description of Figure. PI. XI. Fig. 6. Part of massive, thick- 

 branched zoarium, X 16 dia. Inferior Oolite. Loc. ? B. 2286. 



Affinities. The figures of sections of this species clearly show 

 that it is a true Ceriopora. It has been previously regarded as 

 only a massive form of the species called Ceriopora corymbosa 

 (Lamx.), which has been here referred to the genus Ceriocava. 



The species differs from C. globosa, Mich., by its erect habit and 

 the absence of the tubercles around the apertures. 



Worn fragments cannot be absolutely separated from Ceriocava 

 corymbosa (Lamx.) by external characters ; but the examination of 

 microscopic sections at once enables them to be distinguished. As 

 a rule, the general aspect of the zoarium enables the two species 

 to be distinguished, as the branches of Ceriopora arlorescens are 

 more massive, lobed, and irregular. Those of Ceriocava corymlosa 

 are thinner and more regularly cylindrical. 



LIST OF SPECIMENS. 



B. 2286. Inferior Oolite. Cotteswolds. Figd. PL XI. Fig. 6. 

 B. 2287. Crickley Hill. 



D. 2163. Great Oolite. Bradford, Wilts. Brodie CoU. 

 B. 4888. Inferior Oolite. Leckhampton. Holl Coll. 

 D. 2252. Bathonian Calcaire a polypiers. Eanville. 



D 

 . 



D. 2235. Specimens and section. Bathonian Calcaire a polypiers. Eanville. 

 "? 60377. Bathonian Calcaire a polypiers. Ranville. 



INDETERMINABLE SPECIES AND RECORDS. 



1. Ceriopora clavata, Goldfuss, et auct. 



A Neuropora. 



2. Ceriopora compacta, Quenstedt, 1858. 



SYNONYMY : 



Ceriopora compacta, Quenstedt, 1858, Der Jura, p. 665, pi. Ixxxi. figs. 62-3. 

 ,, ,, Oppel, 1866, Zone Amm. Iransversarius : Geogn. Pal. Beitr. 



Bd. i. Ht. 2, p. 296. 



Distribution. Zone of Peltoceras limammatus : Bollart. Lower 

 Oxfordian Peltoceras transversarius : Oberbuchsiten, Switzerland. 

 Affinities. This is probably a Neuropora. 



