TRIBE II. — CARYOPHYLLACEA, 
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Genus VI.— AEACHNOPHYLLUM.^Dana. 
Aggregate Cyatliopliyllidge, having the cells faintly radiate 
(the rays often obsolete towards the margin) ; texture of the 
corallum for the most part cellular ; of the radiating lamelleej 
very minutely cellular, — Plate 26^ fig, 5. 
Genus VII.— CYSTIOPHYLLUM.— Lonsdale. 
Quite simple or ramose Cyathophyllidae. Corallum not ra- 
diate, or rarely with distinct rays about the central area ; texture 
of the sides and usually of the whole corallum spumoso-cellular, 
II. THE TRANSVERSE SEPTA OBLIQUE UPWARD AND RUNNING TOGETHER INTO THE AXIS, 
Genus YIII.— CLISIOPHYLLUM.— Dana. 
Quite simple, ramose or aggregato-glomerate. Corallum hav- 
ing the cells radiate, the middle within consisting of septa and 
cellules converging upward, but without a distinct axis ; texture 
exterior to this middle portion cellular.— Plate 26, fig. 6, 7. 
Genus IX. — MICHELIXIA. — Koninck. 
Aggregate Cyathophyllidae. Corallum with excavate cells; 
the whole interior with oblique irregular septa, converging to- 
wards an axial line ; axis none. 
Genus X.— COLUMN APIA.— Goldfuss. 
Glomerate ; polyps laterally in contact, and consequently pris- 
matic. Corallum having the cells radiate, the middle within 
consisting of oblique septa and cellules converging upward into 
an axis ; texture exterior to this middle portion, cellular,— Plate 
26, figs, 9, 10. 
