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TRIBE III. MADREPORACEA. 
Plate 33, fig. 6, fragment of corallum, natural size.— Ceylon, East Indies.— 
Rev. G. A. Aphthorp. 
7. Madrepora cytherea {Dana). — Vasiform, pedicellate; frond very 
broad, 1 to 2 inches thick ; branches reticulately coalescent ; below compla- 
nate, without branchlets ; above branchlets crowded, i to 1 inch long, often 
very short and acervato-proliferous. Corallum having the calicles labellate ; 
lip long and scarcely at ail flattened ; the apical calicle long cylindrical ; 2 to 
2^ lines long and f of a line broad. 
Plate 32, figs. 3 a, 3 6, fragments of corallum, natural size ; 3 a, weathered 
specimen. — Tahiti, Society Islands. — Exp. Exp. 
8. Madrepora spicifera {Dana). — Vase-shaped, fronds very broad, i to 
fl inches thick ; below closely reticulate and complanate ; above with nearly 
simple branchlets, *1 to 1 inch long, 2 lines in thickness, subacute. Corallum 
having the calicles of the branchlets imbricate, labellate ; lip somewhat flat- 
tened, truncate ; star indistinct. 
Plate 33, fig. 4, specimen from the Feejees, natural size; 4a, fragment of [ 
same; 4&, and 5, fragments of specimens from Singapore: plate 31, figs. 6a, 
6, c, calicle of Feejee variety, enlarged. — Singapore and the Feejee Islands. ] 
—Exp. Exp. 
5. Madrepora hyacinthus {Dana). — Vasiform, pedicellate, frond 1 to 
inches thick, branches sparingly coalescent ; below, branchlets crowded 
and spreading, 1 to inch long, often proliferous ; above, branchlets slender 
of an inch thick), nearly simple, sometimes proliferous, ^ to f of an inch 
long. Corallum having the calicles tubo-labellate, not fragile, 1 to lines 
long, lip not at all flattened ; cells open, with an indistinct star, apical calicle 
cylindrical, prominent. 
Plate 32, fig. 2, fragment of corallum, natural size, showing the character 
of the upper and under surface. — Feejee Islands. — Exp. Exp. 
10. Madrepora surculosa {Dana). — Short and stout pedicellate, broad, 
and slightly concave, flat or a little convex ; frond 11 to 2 inches thick, branches 
coalescing ; below, flattened, and with no spreading branchlets ; above, branch- 
lets crowded, erect, spike-shape, tapering, and nearly acute, 1 to 2 inches long, 
often a little angular, proliferous at apex. Branchlets of the corallum with 
crowded calicles, 1 to li lines long, scarcely labellate, elongated lip not flat- 
tened, the subapical calicles becoming very small, the apical cylindrical, and 
f of a line broad ; star indistinct, 
Plate 32, fig. 4, corallum (small specimen), natural size; 4a, branchlet, 
ditto ; fig. 5, probably the same, from Tahiti. — Society and Feejee Islands, 
and East Indies. — Exp. Exp. 
