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TRIBE III. MADREPORACEA. 
Genus YI—CATENIPOEA. j 
Favositidae with the buds acrogenous and aggregated laterally 
in a single series ; the corallum, therefore, consisting of vertical 
laminae, often intersecting one another, and containing a single i 
series of cells ; transverse septa numerous. 
Subfamily III.— HELIOPORINJE. 
Favositidae, with scattered polyps ; cells of the corallum cir- 
cular, not contiguous, rays very narrow. 
Genus YII. — HELIOPOEA.— Blainville. 
Glomerate or ramose. Corallum with the cells quite small ^ | 
and unequal, remote, interstices minutely cellular and internallyl 
fine tubular. 
Heliopora CiERULEA ( Pallcis ,) Blainvilk . — Glomerato-laminate, laminae 
erect, variously lobed or digitate, lobes sometimes very short; summits H to 
2 lines thick, at base often over f of an inch ; internal color blue. 
East Indies. Balabac Passage, north of Borneo. — Eocp. Exp. 
Genus YIII.— HELIOLITES.— Guettard. 
Glomerate ; cells of the corallum rather large, distant ; inter- 
stices cellular throughout, and not tubular. | 
Genus IX.— MILLEPOEA. 
Incrusting, glomerate, laminate or ramose, with the branches 
never terete ; polyps scattered. Coralla with the cells very mi- 
nute and unequal, not contiguous, rays obsolete, interstices 
scarcely porous. 
1. Ramose, often lamellate, and ramoso-lobate above. 
1. Mili.epora alcicornis (Pallas). — Large, sublamellate, incrusting at 
base, fronds stout, multifid, laciniato-palmate, and often much subdivided or 
