CERIOPOKA. 
163 
D. 3144. A zoarium 'svith a thin section. Lower Greensand. Farringdon. 
J. Brown Coll. Section, %d. p. 162, Fig. 42. 
D. 7293. A young clavate form. Lower Greensand. Farringdon. CunningtonColl. 
10,237. A massive tuberous zoarium and fragment of the end of a branch. 
Lower Greensand. Farringdon. Mantell Coll. 
3. Ceriopora collis (d’Orbigny), 1854. 
Synonymy. 
ReptomuUicava collis, d’Orbigny, 1854. Bry. Cret. p. 1036, pi. 792, figs. 1-3. 
,, ,, Pergens, 1890. Rev. p. 386. 
non ,, ,, Vine, 1889. Polyz. Greensd. : Proc. Yorks. Geol. Soc. 
vol. xi. p. 258. 
,, ,, ,, Vine, 1890. Bry. Red Chalk: Quart. Journ. Geol. Soc. 
vol. xlvi. p. 481. 
,, ,, ,, syn.) Vine, 1891. Polyz. Red Chalk : Proc. Yorks. 
Geol. Soc. vol. xi. p. 382. 
,, ,, ,, Vine, 1892. Addit. Cret. Poiyz. : ibid. vol. xii. p. 152, 
pi. vi. figs. 10-12. 
,, ,, ,, Vine, 1893. Compl. Rep. : Rep. Brit. Assoc. 1892, p. 333. 
,, ,, ,, Gamble, 1896. Cat. Bry. Chatham, p. 4. 
Diagnosis. 
Zoarium incrusting either as a flat sheet or raised as a broad 
rounded tubercle. Surface even. 
Zocecia with very small apertures, which are circular and well 
spaced. 
Dimensions. 
Zooecial apertures in specimens from Farringdon, and as far as 
can be measured from d’Orbigny ’s drawings, about • 1 mm. in diameter. 
Distribution. 
British : 
Lower Greensand ; Farringdon. 
Foreign : 
Neocomian: Fontenoy and Saint- Sauveur, Yonne. 
Figures. 
PI. y. Fig. ba. A specimen attached to a Brachiopod ; nat. 
size. Fig. bh, part of the same; X 12 dia. Lower Greensand: 
Farringdon. D. 3027. 
Affinities. 
The nearest ally of this species is C. incrustans, Reuss,^ which 
has more crowded smaller apertures. 
D. 3027. A specimen attached to a Brachiopod. Lower Greensand. Farringdon. 
Figd. PL V. Figs. 5, 55. 
1 Von Reuss. Verst, bohm. Kr. p. 63, pi. xiv. fig. 8. 
