166 CERIOCA.VA. 



Distribution. Inferior Oolite : Leckhampton. 



Description of Figures. PI. X. Fig. 6. Part of a zoarium 

 showing worn and unworn conditions, X 12 dia. Inferior Oolite: 

 Leckhampton. 51130. Fig. 14. Longitudinal section through 

 part of the same, X 1 2 dia. 



Affinities. This species is most nearly allied to Ceriocava 

 corymbosa (Lamx.). The differences can be clearly seen when 

 a longitudinal section is examined. The central axis has far 

 fewer zooecia, and these are not so tightly packed. It is not 

 easy to separate the specimens of the two species by the external 

 characters, but the regularity of the apertures in C. corymbosa 

 enables this to be done. A comparison of Fig. 13 and Fig. 14 

 shows the difference between the two species. 



SPECIMEN. 



51130. Specimen and section. Inferior Oolite. Leckhampton. Figd. PI. X. 

 Fig. 6 ; and Fig. 14, p. 165. 



Family FASCIGERID^l, D'Orbigny. 



SYNONYMY : 



Fascigerida, pars, D'Orbigny. 

 TheonoidcB, pars, Busk. 

 Cerioporidce, pars, Busk. 

 Cerioporina, pars, Hagenow. 

 Frondiporidce, Smith, Busk, MacGillivray. 

 Corymboporidce, Smith. 

 Fasciporidce, Pergens and Meunier. 



Diagnosis. Cyclostomata Tubulata in which the zooecia are 

 simple, open tubes. These arise from a small cupuliform or discoid 

 base (the Pelagia or Defrancia stage). The zocecia are mono- 

 morphic and greatly elongate. The zoarium consists of tufts, and 

 the apertures all occur at the ends of the tufts. 



Affinities. As its name implies, this family consists of Bryozoa 

 of which the zocecia are grouped in tufts. It differs from the 

 Osculiporidae by the fact that the apertures are always at the ends 

 of the tufts, instead of in clusters along them. It differs from 



