192 
HETEEOPORID^. 
3. Heteropora clavata, Kade, 1852. 
Synonymy. 
Heteropora clavata, Kade, 1852. Los. Verst. Schanzenb. p. 32. 
,, ,, Gregory, 1909. Kew Cret. Bry. : Geol. Mag. dec. v. vol. vi. 
p. 64. 
Diagnosis. 
Zoarium piriform, with a short stem, which expands regularly 
upward into a pear-shaped mass. Transverse section irregularly 
elliptical; flattened on the side. Most of the surface is 
smooth, but the type-specimen is irregularly pitted. 
Zooecia large, irregularly scattered. Mesopores large, a circle 
of five to seven around each aperture ; and the circles of 
mesopores are confluent, so that but one mesopore or line of 
mesopores occurs between adjacent zooecia. 
Fig. 51. — Heteropora clavata. a. Zoarium ; 
X 10. D. 7294. 
Dimensions. 
Height of zoarium 
Diameter of zoarium . 
Diameter at the base . 
Diameter of apertures . 
Diameter of mesopores 
X 2. h. Part of the surface ; 
mm. 
18x 10 
5x4 
•2 
•06--1 
Distribution. 
British : 
Lower Greensand: Farringdon (Workhouse Pit), Berkshire. 
Foreign : 
Remanie in Drift : Schanzenberg, near Meseritz. 
