TERTIARY CORALS. 49 
In the Museum of Practical Geology, London, and in the collection of Frederick 
Edwards, Esq., F.G.S. 
Lobopsammia cariosa is a common fossil at Brockenhurst, and the specimens differ in 
the stoutness of the corallum and distinctness of the coste. There is a so-called species, 
L. dilatata, Roemer, from Latdorf ;? but it is not worthy of more than the title of a variety 
of our widely diffused form. The same may be determined with respect to L. Parisiensis, 
Michelin, sp. 
Section—MADREPORARIA PERFORATA. 
Famity—PORITIDES. 
Sub-fanily—PORITIN AB. 
Genus—LitHaR@a. 
Liraara#a Brockunnursti, Duncan. Plate VII, figs. 17, 18. 
The corallum is massive, irregular in shape, and has an uneven upper surface. The 
corallites are close, and are very rarely separated by much reticulate cellular structure ; 
they are rather short, and vary in their diameter in different parts of the corallum. The 
walls are well marked. 
The calices are shallow, close, and generally quadrangular. The margins are formed 
by trabecular tissue, and the septa are irregular, unequal, wavy, and are often enlarged at 
the inner end ; their lamin are much perforated; they are in six systems, and there are 
three cycles, the primary being the largest ; the others are often very small. The lamin 
are faintly dentate laterally. 
‘The columella is slightly developed, and appears to be formed by processes from the 
septal ends. Diameter of the calices jths inch. 
Locality. Brockenhurst. In the collection of Frederick Edwards, Esq., F.GS. 
‘The scanty coenenchyma, the shallow and quadrangular calices, the three cycles of 
unusually perforate septa, the ill-developed columella, and the shape of the corallum, dis- 
tinguish this species from Litharea Websteri and the Litharee of the French Tertiaries. 
The genus ranges from the Maestricht Chalk to the Faluns at Dax. 
' Roemer in Dunker’s ‘ Palzeontographica,’ 1862—1864. 
2 In the Lower Oligocene. 
