164 
CERIOPORID^. 
4. Ceriopora confusa (de Loriol), 1868. 
Syi^ontmt. 
Geriocava confusa^ de Loriol, 1868. Mon. Valang. Arzier: Pal. Suisse, ser. 4, 
pt. ii. p. 66, pi. vi. figs. 10, 12. 
Ceriopora dumosa^ de Loriol & Gillieron, 1869. Mon. Urg. inf. Landeron : Mem. 
Soc. helvet. Sci. nat. vol. xxiii. p. 42, pi. iii. figs. 3, 4. 
Diagnosis. 
Zoarium massive and tuberous, or spreading as a broad sheet, 
giving off short, thick, blunt processes or branches. 
Zooecia large ; apertures of medium size, circular to oval, 
about *2 mm. or slightly less in diameter, and about thirty to 
thirty-five per sq. mm. 
Dimensions. 
De Loriol’ s 
type 
of confusa. 
De Loriol’s 
t}T)e 
of dumosa. 
Flat-based 
var. 
B.M. 
D. 3020. 
PI. Y. Fig. 9, 
and Fig. 43, 
p. 165. 
mm. 
mm. 
mm. 
Diameter of zoarium 
20 
21 
48x52 
Diameter of processes 
2-3 
2-3 
7x9 
Diameter of apertures 
— 
— 
•2--16 
Number of apertures per sq.mm. ... 
3o 
30 
27 
Figures. 
PI. Y. Fig. 9. A specimen of the typical, broad-based form ; 
nat. size. Lower Greensand : Shanklin. Westlake Coll. - D. 3020. 
Fig. 43, p. 165. Part of a vertical section across part of the 
specimen figured as PI. Y. Fig. 9, showing both transverse and 
longitudinal sections of the zooecia; X 12 dia. Lower Green- 
sand : Shanklin. D. 3020. 
Distribution. 
British : 
Lower Greensand : Shanklin, Isle of Wight. 
Foreign : 
Lower tJrgovian : Landeron, Switzerland. 
Affinities. 
Among older species of Ceriopora^ this C. confusa is allied to 
C. arduennensis (d’Orb.), which has a massive zoarium and crowded 
apertures ; but it has a variolate surface, and the zoarium is 
