CORAL FAUNA OF HALDON, DEVONSHIRE. SI 
Discussron. 
Rey. J. F. Braxe asked whether any Upper Greensand species 
was regarded by Prof. Duncan as continuous; and whether there 
were not communications between the smaller and larger zooid 
tubes in the recent Heliopora. 
The Cuarrman said that the age of the Haldon beds had to be 
decided very much by the coral fauna, as there were few greater 
stratigraphical unconformities in the British Isles. It was difficult, 
from the silicified character of the rock, to make out some of the 
characters of the corals. As regards the molluscan fauna, these 
beds have about equal claims to be called Neocomian, Gault, and 
Upper Greensand. ‘he evidence of the corals, therefore, was of 
great value; they seemed to show a deeper-sea condition than did 
the Mollusca. Nothing at Lyme Regis or along the south coast 
paralleled the Haldon deposits; they appeared to be on a higher 
horizon than the Gault beds of Black Ven. Hence the paper was 
of great value and importance, and of peculiar interest, for the cor- 
relation which it suggested with other European areas. It was a 
worthy addition to the work which the author had previously done 
in the publications of the Palzeontographical Society. 
Prof. Duncan said that he did regard the species as continuous, 
and gaye examples of continuous species, and stated that the struc- 
ture of the hard parts resembled that of the recent specimens. 
Species might have migrated from localities-which became unfavour- 
able to those which were more favourable, as subsidence and up- 
heayval progressively took place in different localities. 
Q.J.G.8. No. 137. H 
