TRIBE III. MADREPORACEA. 
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little laciniate, an inch thick. Corallum below, short caliculate, calicles na» 
riform ; above, calicles cylindrical, with an oblique apex, very unequal, many 
2 lines long and broad, others round nariform, and others obsolete; star 
distinct. 
Plate 31, fig. 11a, view of cell, enlarged; 11 &, c, d, e, different calicles, 
natural size. — West Indies, where it is a very common species. 
2. Madrepora alces (Dana). — Stout foliate, fronds deeply digitate lobed ; 
lobes narrow, oblong, or ligulate, often 2 feet long, 2 to 4 inches wide, and i 
to H inches thick. Corallum below, with short crowded calicles ; above, cali- 
cles tubiform, unequal, 2 to 2| lines long, and f of a line broad, erect, never 
nariform, many obsolete ; star distinct, two lamellse nearly uniting below. 
Plate 31, fig. 12a, view of cell, enlarged; 12 6, c, e, different calicles, 
natural size. — East Indies. — E’xp. Exp. 
3. Madrepora flabellum {Lamarck). — Spreading foliate, fronds rather 
stout, convoluted at base, the margin consisting of incipient branchlets scarcely 
I- of an inch thick. Corallum below, with short crowded calicles ; above, cali- 
cles slender tubiform, often 1^- lines long and i to f of a line broad, never na- 
riform, sometimes acervate in lines, many immersed cells ; star scarcely dis- 
tinguishable. 
Plate 31, fig. 13a, view of cell, enlarged; 13 6, c, c^e, different calicles, 
natural size. — West Indies. 
4. Marrepora cyclopea {Dana). — Very broad foliate, and ponderous, 
fronds spreading, lobed, 3 to 6 inches thick, and 6 feet or more broad, with 
large, rounded, remotely scattered knobs (2 to 3 inches thick). Corallum 
above, having the calicles crowded. 
Wake’s Island, Pacific Ocean. — Exp. Exp. 
5. Madrepora conigera {Dana). — Broad foliate, fronds stout, lobed at 
margin, and sometimes deeply subdigitate ; above, covered with short and 
stout subacute cones ; below, surface plane. Corallum below having very 
short calicles ; above, calicles much crowded, labellate, lip elongate, nearly 
erect, and almost flat; star obsolete, two of the lamellee scarcely broader. 
Plate 32, fig. 1, part of corallum in outline, natural size; 1 o, one of the in- 
cipient branchlets, ditto. — Singapore. — Exp. Exp. 
6. Madrepora efflorescens {Dana). — Vasiform(?), branches coalescing 
into a solid plate 4 to | of an inch thick, which is reticulate only near the mar- 
gin, and ribbed with the coalescing branches ; below flat ; above, having very 
short crowded branchlets, the marginal an inch long and i of an inch in 
diameter, but those of the middle of the frond not terete, a fourth of an inch 
long, acervate and proliferous. Corallum below with short calicles ; above, 
the calicles of the branchlets labellate, lip long und erect, the apical calicle 
cylindrical, a line long and i a line broad. 
