94 P. M. DUNCAN ON THE UPPER-GREENSAND 
TrocHosrrts Morrist, sp. noy. (Pl. VILL. figs. 13-15.) 
The corallum is conical and short; the broad, circular, widely 
open, shallow calice is much broader than the length of the whole. 
The septa are numerous, close, granular laterally ‘and superficially, 
and unite in groups ; the largest reach the axial space and correspond 
externally with coste. The smaller septa occasionally fuse into the 
sides of the larger, besides simply joining them. ‘The axial space is 
long and deep, the columella is minutely papillary and sel and 
the sy napticulie cue scarce but distinct. Length of corallum 55, inch ; 
breadth of calice +4 inch. 
Loc. Haldon. i the collection of W. Vicary, Esq., F.G.S., Exeter. 
ALCYONARIA TABULATA. 
Hautropora c@RvuLEA, Grimm. (PI. VIII. figs. 16-18.) 
The corallum is massive and in thick laminz, which are either 
flat or gibbous on the surface. 
Coenenchyma largely developed, and intertubular projections very 
small. Larger tubes wide apart, irregular, circular in outline, and 
with from 12 to 18 very slightly projecting septa. Tabule bent 
downwards. 
There is a small variety of the species with a rounded surface and 
smaller tubes. 
Loc. Haldon Gr eensand, — In the coliection of W. Vicary, Esq., 
F.G.8., Exeter. 
Remarks on the Species. 
The Trochosmilian belongs to a group which may be said to be 
characteristic of the Hippurite Chalk and Craie tuffeau. 
Baryhelia is a remarkable genus of the Oculinidz without colu- 
mella, pali, and coste. Its species hitherto described have great 
calices, and they have been found in the Craie tuffeau. The new 
form has only generic alliances with them. 
Haldonia is a new genus, and may be said to be a Cyathophora 
with pali; but the costs are not continuous. The species is a very 
beautiful form, and conforms to the type of the age. 
Stelloria is a genus restricted to the Craie tuffeau of Le Mans, 
Tle d’Aix, Gosau, and Piesting, in Europe; but it is closely allied 
to the Calorie of the Red Sea and Pacific and of the West-Indian 
Miocene. A Stelloria, not without its affinities to the Haldon form, 
is described by Stoliczka from the Turonian of South India. The 
new species is very common ; and although its specimens do not grow 
into very large forms, yet the presence of small forms is very signi- 
ficant so far as external conditions are concerned. 
The species of Thamnastrea are stunted forms ; they incrust other 
substances ; and one of them has the peculiarity (which is common to 
several Haldon species of different genera) of haying more costae 
than septa from the latter branching. 
The species of Actinacis are very interesting; they are perforate 
