98 
TRIBE III.— MADREPORACEA. 
I 1 
Subfamily L— ALVEOPORIN^. | 
Favositidae, forming spongy calcareous secretions ; cells angu- j 
lar, contiguous, internally slenderly ecliinulate. j 
Genus I. — ALYEOPORA. — Blainville, [; 
Glomerate or furcato-ramose ; coralla spongy ; cells contigm - | 
ous, with, the sides very thin, and thickly pierced with holes ; ' | 
transverse septa remote. ^ 
1. Alveopora retepora (Ellis,) Blainvilk.—GlomerSito-glohose, Coral- ' 
lum with the cells angular, and having an erect margin, scabrous with minute 
teeth. Is 
2. Alveopora dedalea (Forskal,) Blainville. — Lobato-glomerate ; ex- ! 
panded polyps, brownish-umber, or ash-colored, tentacles filiform ; when con- 
tracted, greenish-bronze. Corallum spongy and tender ; cells a line in diam- | 
eter, rarely wider, septa spinulous above, and the surface of the corallum, i;, 
therefore, throughout hispid. f ' 
Red Sea. — Forskal, Savigny, and Ehrenberg. IC 
3. Alveopora spongiosa (Dana). — Large, lobato-glomerate, alive for 10 
to 12 inches. Corallum spongy and very tender; cells a line in diameter, |. 
scarcely as deep as broad, filiferous within; at apex much smaller; parietes | 
filamento-cribrate, porules narrow-oblong. ^ 
Plate 48, fig. 3, corallum, reduced two diameters ; 3 a, part of same, natural '| ; 
size ; 3 6, cells of surface, enlarged ; 3 c, vertical section of a cell ; 3 d, verti- f 
cal section of corallum, enlarged. — Feejee Islands. — EJ.rp. Exjp. | 
4. Alveopora rubra (Qiioy Gaymard). — Furcato-ramose, branchlets 4 
long, erect ; polyps red, with short and stout tentacles. Corallum with spinous | 
cells, sex-dentate within. 
Port Carteret, New Ireland. — Qiioy Gaymard. | 
5. Alveopora fenestrata (Lamarck,) Dana. — Furcato-ramose; branches 
stout, subgibbous, very obtuse. Corallum having the cells deep, subangular, | 
filiferous within ; parietes fenestrate. t 
“ Austral Seas.” — Peron 8^ Lesueur. | 
Subfamily II.— FAVOSITINJE. |‘ 
Cells of the corallum at the summits at least contiguous and 
angular ; lamellae entire, often very narrow or obsolete. | 
