ON TH= BRITISH FOSSIL CORALS. 91 
Trochosmilia (Ceelosmilia) cornucopie, Duncan. 
The corallum is strongly curved in the plane of the smaller axis, and it is 
compressed superiorly, and is finely pedunculate. The growth-rings and 
swellings are moderately developed. The cost are subequal above and 
eristate, and unequal inferiorly. The septa are numerous and very unequal. 
There are five cycles of septa, and six systems. The primary septa are very 
exsert, and the secondary ones less so. The septa of the fifth cycle are very 
small. The calice is elliptical and the fossa very deep, the larger septa join- 
ing those opposite at its bottom. There are traces of epitheca. 
Height 1 inch. Breadth of calice 4 inch. Length of calice 1 inch. Depth 
of fossa 2 inch. 
Locality. Trimmingham, Upper Chalk. 
In the collection of the Rev. T. Wiltshire, F.G.S. &c. 
Trochosmilia (Celosmilia) Wiltshiri, Duncan. 
The corallum is tall, finely pedicellate, and is not compressed. The growth- 
rings are distinct. The coste are very distinct and unequal, and they reach 
from base to calice. The smaller intermediate cost are ornamented with 
chevrons and horizontal lines. The larger coste have a secondary crest upon 
their free surface. The septa are unequal, slender, and not crowded. The 
calice is circular. There are five cycles of septa, but the fifth is incomplete 
in some systems. The primary septa are large, slightly exsert, and extend 
far inwards, The calicular margin is very thin, and the fossa is deep. 
Height 12 inch. Diameter of calice 2 inch. 
Locality. Norwich, Upper Chalk. 
In the collection of the Rev. T. Wiltshire, F.G.S, &e. 
Trochosmilia (Celosmilia) Woodwardi, Duncan. 
The corallum is tall, cornute, slightly pedicellate and narrow. The growth- 
markings are distinct. The coste are distinct from base to calice. Two 
large subcristiform and very distinct coste bound three intermediate small 
and more or less moniliform cost. Sets of these costs occur around the 
corallum. The septa are crowded, wavy, and unequal; many unite late- 
rally, and the largest reach far into the axial space. The calice is cireular, 
and the wall is very thin. 
Height 2 inches. Breadth of calice 4 inch, 
Locality. Chalk of South of England. 
In the British Museum, Dixon Collection. 
Trochosmilia (Ceelosmilia) granulata, Duncan. 
The corallum is tall and slightly curved ; it has a long pedicel with a very 
distinct base. The corallum is slightly compressed, and bulges here and there. 
The coste are well marked, distant, subequal, and intensely granular. The 
larger coste are more distinct inferiorly and midway than close to the cali- 
cular margin ; they are cristiform in some places, notched by chevron-shaped 
ornamentation in others, and occasionally sharply pointed or absent. The 
spaces between the larger coste are wide, faintly convex, and are marked 
longitudinally by small coste, and transversely by wavy or chevroned orna- 
mentation. The whole external surface of the corallum is very granular. 
The calicular wall is very thin, and the calice is elliptical. There are three 
perfect cycles of septa, and some orders of the fourth cycle in some of the 
systems. The septa are wide apart, slightly exsert, unequal, and slender ; 
they do not reach far inwards at once, but dip downwards with a gentle curve. 
Tn a section the inner margin of the lower septa is wavy. The endotheca is 
scanty. 
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