HETEKOPORA. 
191 
Figures. 
PL Y. Fig. 7<7. A zoarium from the side; nat. size. Fig. 
part of the surface of the same specimen ; X 10 dia. Lower 
Greensand : Farringdon. Cunnington Coll. D. 7292. 
PI. Y. Fig. 8. A zoarium with short thick branches ; nat. size. 
Lower Greensand : Loc. ? South of England. Old Coll. B. 118. 
Fig. 50. A section, X 13 dia., across part of the zoarium 
shown on PL Y. Fig. 8. Lower Greensand : Loc. ? South of 
England. Old Coll. B. 118. 
Affinities. 
The unfortunate necessity for the removal of the name michelini 
to the species for which von Reuss’s name of coalescens was more 
appropriate, requires the introduction of a new name for the 
specimens that d’Orbigny figured in 1854 as MuUicrescis michelini. 
This species has thick, irregular, massive branches, which differ 
markedly from the often anastomosing branches of the zoarium, 
which was used by d’Orbigny as the type of his Ceriopora 
michelini. 
There is no evidence for the multilamellar structure of the 
zoarium, so it should remain in Heteropora. 
Fig. 50. — Heteropora keepingi. Section; x 13. B. 118. 
LIST OF SPECIMENS. 
B. 118. A zoarium with short thick branches and thin section cut from it. 
Lower Greensand. Loc. ? Judging from the nature of the matrix 
(which is a dark-green, coarsCj glauconitic sandstone) it probably 
came from the Isle of Wight. Figd. PL Y. Fig. 8, and Fig. 50. 
D. 7292. A long branched zoarium. Lower Greensand. Farringdon. 
Cunnington Coll. Figd. PL Y. Fig. 7. 
D. 7169. Four zoaria. Lower Greensand. Coxwell, near Farringdon. F. Ellis 
Coll. Received in exchange with R. F. Damon, 1901. 
