272 
HADIOPORID.?:. 
Dimensions. 
Height of zoarium 
Diameter of zoarium . . . 
Number of sub-colonies 
Diameter of apertures . . . 
Type of 
Goldfuss. 
mm. 
10 
4 
6 
about •! 
D’Orbigny, 
pi. 747. 
mm. 
7-8 
4-5 
4-6 
•1--15 
Distribution. 
Cenomanian: Le Mans, Sarthe ; Essen; lie Madame, Cbarente-Inferieure. 
? Danian : Faxoe and Annetorp. 
? Senonian — Campanian : Zone of Belemnitella mucronata, Kdpinge ; beds 
with Aetinocamax mamillatus, Balsberg, Karlshamm, and 
Gropemollan. 
Affinities. 
D’Orbigny by mistake referred the horizon of Goldfuss’ clavata 
to the Senonian instead of to the Cenomanian; and he adopted 
the name clavula (probably from Michelin, though giving no 
reference to that author) for the Cenomanian species. The two 
specimens so well figured by d’Orbigny as D. clavula are no doubt 
the same as Goldfuss’ clavata ; but whether the C. clavula ofi 
Michelin is the same species is doubtful. 
MM. Pergens & Meunier identified some specimens with un- 
branched stems, 2-3 mm. in diameter, from the Danian of Faxoe, as 
this species; but as they consider that Domopora truncata (Flem.) ^ 
may also belong to the species, their record is not convincing. 
Hennig has described specimens of probably the same form from 
both the Danian and Senonian of Scania, and as the^ apertures 
are -06 mm. in diameter, or about half the average size of 
those in the typical form, the Danian and Senonian specimens are 
a distinct variety or species. 
The specimen from the Miocene of Djebel !N’asser- Allah in 
Southern Tunisia, identified as II , clavata by M. Canu and 
illustrated by some excellent photographs, appears to me quite 
distinct from the Bryozoon described by Goldfuss ; the Tunisian 
specimens show neither the zonal arrangement nor the vertical 
series of apertures of the Essen species. 
Busk, iii 1859, recorded the species from the Pliocene (the Suffolk 
Crag), as he thus identified a clavate Heteropora ; his generic 
^ See e.g. Domopora stellata^ Hincks, 1880. Brit. Mar. Polyz. p. 481, pi. Ixiii. 
figs. 10-14. 
