86 REPORT—1868. 
two species from the Castelgomberto district. The genus became extinct 
in the Miocene age. 
The smaller Heliastreans and Astreeans appear to represent these genera 
in the recent coral-faune. 
It may be assumed, from our knowledge of the habits of the representatives 
of the Eocene species in the existing seas, that the bulk of the fauna lived 
on oozy sea-bottoms, at a depth of from 10 to 100 fathoms. Such a sea (as 
regards its depth, bottom, and magnitude, but not as regards its temperature) 
as has been dredged off Unst, or the Southern China Sea, where there are no 
reefs, might resemble that which contained the old Z'urbinolie, Trochocyathi, 
Paracyathi, Oculine, Stephanophyllie, Balanophyllie, Dendrophyllie, and 
Stereopsammue. 
The genera Stylocenia, Astroceena, Dendracis, Porites, Iitharea, and Awo- 
pora were probably located on small reefs, or in shallower water than the 
others. The fauna, as a whole, is insignificant, and bears a very feeble re- 
lation to the magnificent Eocene Coral-fauna of Castelgomberto, the South of 
France, and Sindh. These were the coral-tracts of the period, and were full 
of great reefs, whose corals are represented now-a-days by large and quickly 
growing species. 
The immense break between the Upper Chalk and the British coralliferous 
Eocene deposits is proved by the total difference of their coral-faune. 
The scanty relationship between the British Eocene and Lower Oligocene 
coral-faune has already been noticed. Part of the British Eocene coral-fauna 
is represented by species now living in tke British, Spanish, and Mediter- 
ranean seas, and the rest by species in the Pacific and East-Indian oceans. 
The slight affinity between the British Eocene and the recent West-Indian 
coral-faune is therefore worthy of notice. 
Fossil Oorals from the Upper and Lower White Chalk of Great Britain. 
The following authors have written upon this subject :—-MM. Milne-Ed- 
wards and Jules Haime, op. cit. Lonsdale in Dixon’s ‘Geology of Sussex.’ 
‘Parkinson, ‘Organic Remains of a Former World.’ Mantell, ‘Geology of 
Sussex,’ and Trans. Geol. Soc. 2nd ser. vol. iii. Fleming, ‘ British Animals,’ 
1828. Phillips’s ‘ Illustrations of the Geology of Yorkshire,’ pt. 1, 1829. 8S. 
Woodward, ‘Synopt. Tab. Brit. Org. Remains,’ 1830. R. C. Taylor in Mag. 
Nat. Hist. vol. iii. p. 271 (1830). 
MM. Milne-Edwards and Jules Haime noticed and described nine species 
from these formations. One of these species had been previously described 
by Mantell, and another by Reuss; but seven species were added to our 
British fauna through the industry of the great French zoophytologists. 
During the last ‘few months I have thoroughly examined the specimens 
offered to me, and those which had been studied by MM. Milne-Edwards and 
Jules Haime, Lonsdale, and Mantell. I can add ten new species to the list of 
the corals from the White Chalk, and five good varieties of formerly known 
species. It is necessary also to admit a species of Mr. Lonsdale’s, and to 
uppress one of MM. Milne-Edwards and Jules Haime. 
Corals from the Upper and Lower White Chalk. 
1. Caryophyllia cylindracea, Reuss, sp.* 4, Onchotrochus serpentinus, Duncan f. 
2. Lonsdalei, Duncant. 5. Trochosmilia laxa, Ed. § H., sp. and 
3. Tennanti, ’ Duncant. varieties 1, 2, 3 t. 
* Synonym Cyathina levigata. T Species not hitherto described. 
¢ Varieties or subspecies not hitherto described. 
