10 BRITISH FOSSIL CORALS 
5. ‘TROCHOSMILIA (C@LOSMILIA) GRANULATA, Duncan. PI. IV, figs. 1—4; Pl. VI, fig. 9. 
The corailum is tall and slightly curved, and 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 calicular 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 cost, and transversely by wavy 
or chevroned ornamentation. 
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. 
In a section the inner margin of the larger septa is wavy. 
‘The endotheca is scanty. 
Height, lgrds inch. Length of calice, sths inch; breadth, 3rds inch. 
Locality. Norwich, and Chalk of south of England. In the British Museum 
(Dixon Collection). 
6. Trocnosmitia (C@Losminia) cyLinpRIcA, Duncan. Pl. V, figs. 1—8. 
The corallum is tall, cylindrical, and very slightly bent. The calicular opening is 
smaller in diameter than the rest of the corallum. 
The costee are nearly equal, broad, slightly rounded, and are separated by shallow, 
narrow, and undulating intercostal grooves. ‘The costa are profusely ornamented with 
transverse ridges, straight, curved, or angular, and with large granules. 
The calicular edge is very thin, and the broad convex costa are continuous with 
slender, unequal septa. 
There are four cycles of septa. The primary are exsert, and the lamine of the higher 
orders are very small. 
There is no columella, the larger septa are united by a few short attachments from 
their inner margins. 
The endotheca is scanty. 
Height, several inches. Breadth of the calice, ths inch. 
Locality. Norwich, Upper Chalk. In the Collection of the Rev. T. Wiltshire, F.G.S. 
