P. M. DUNCAN ON THE UPPER-GREENSAND 
co 
bo 
Family OCULINID A. 
BARYHELIA RETICULATA, sp. nov. (Pl. VIII. fig. 1.) 
The corallum is massive, short, and irregularly ramose. The 
calices are few in number, are placed without any definite order, 
and are irregularly separate; some are sunken in the coenenchyma, 
and others are on short conical eminences; they are deep, with 
solid walls, and there are six large septa, and a rudimentary one 
exists between some of the larger. There is no columella, and 
there are no pali. The surface of the coenenchyma is microscopi- 
cally reticulated, and the meshes are small and irregular, but very 
distinct, the ridges being thin and short. There are no coste. The 
diameter of the calices is from 54, to +5 inch. 
Loc. Haldon Greensand. In the collection of W. Vicary, Esq., 
F.G.S., Exeter. 
MADREPORARIA PERFORATA. 
Family FUNGIDA. 
Subfamily Lopnosurin”, Edw. & H. 
THAMNASTR@A BELGICA, Edw. & H. 
_ This species has not been satisfactorily diagnosed by MM. Milne- 
Edwards and Jules Haime; but the forms under consideration from 
Haldon, which appear to be stunted specimens of it, show the fol- 
lowing characters :—The corallum is in the form of a gibbous, thin, 
incrusting lamina. Calices very small, less than 3, inch in dia- 
meter, shallow, with a papillary columella. Septa broadly dentate 
above, stout, subequal, the primaries being the longest. The costa’ 
are bifurcations of the septa. 
In the collection of W. Vicary, Esq., F.G.S., Exeter. 
THAMNASTR#A Ramsayi, sp. nov. (Pl. VIII. fig. 6.) 
The corallum is convex above; the calices are small (less than 
5 inch in diameter), often crowded, and now and then forming 
short series. The columella is large and trabecular, with a few 
papille. The septa, twenty-four in number, are slender, unequal, 
some not reaching the columella, and the coste are more numerous 
than the septa. 
Loc. Haldon Greensand. In the collection of W. Vicary, Esq., 
F.G.S., Exeter. 
ORosERIS HALDONENSIS, sp. nov. (Pl. VIII. figs. 9 & 10.) 
The corallum is large, not very thick ; it incrusts and has a sub- 
plane surface. The calices are in small series separated by well- 
developed short collines, or isolated and in linear groups and 
separated by a colline. The calices are irregular in shape, rather 
