TERTIARY CORALS. 57 
Famity—CARVYOPHYLLIACE. 
Tribe—TRocHOCYATHACES. 
Genus—TROCHOCYATHUS. 
1. Trocnocyataus Austent, Duncan. Pl. IX, figs. 15—17. 
The corallum is rather tall, slightly curved and compressed; it is rounded at the 
base, and its sides are marked with slightly prominent but not spined or crested costz. 
The calice is elliptical, much compressed, and slightly angular at its extremities ; its 
long axis is on a lower plane than the short axis, and its margins are raised into 
several angular processes, on account of the primary and secondary septa being less exsert 
than the tertiary. 
The fossa is moderately deep; and the columella is long, and not very visible. The 
septa are thin, rather close, and very subspinose laterally. 
The septa are in six systems, and there are four perfect cycles. The septa are 
unequal, and are not very exsert: the primary and secondary septa are on a lower 
level than the others, and correspond to the largest and most prominent costz. 
There are small pali before the primary, secondary, and tertiary septa. 
The costz are distinct from the base, and granular ; the primary and secondary are 
the largest, and all are broader than the septa. Height of corallum, 2ths inch. Great 
diameter of calice, {ths inch. Small diameter of calice, ths inch. 
This species belongs to the striated Trochocyathi ;\ and its tall and curved form, with 
its four cycles of septa, bring it in close relation with Zrochocyathus elongatus, Edwards 
and Haime.” The angular calicular margin is wanting in this last species, whose coral- 
lum is moreover slightly twisted. 
It is very evident that the new species is the representative of Zrochocyathus elongatus. 
Trochocyathus elongatus is found at Quartier-du-Vit, near Castellane (Basses Alpes), in an 
Eocene formation, and Zrochocyathus Austeni was discovered at Bracklesham. 
In the collection of Frederick Edwards, Esq., F.G.S. 
2. Trocuocraruus insienis, Duncan. PI. X, figs. 1—4. 
The corallum is tall, compressed, slightly curved inferiorly, and it has a large calice and 
a sharp base. 
The calice is ovoid, and its axes are on the same plane. 
1 ‘Hist. Nat. des Corall., vol. ii, p. 27. 2 «Ann. des Sc. Nat.,’ 3rd ser., vol. ix, p. 305, 1848. 
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