84 
TRIBE III. MADREPORACEA. 
lateral crowded and equal, 1^ lines long, appressed and subimbricate, rostrato- 
nariform, very minutely striated ; star very distinct, two of the lamellae a little 
the most prominent, and meeting below. I 
Plate 34, fig. 3, branchlets of corallum, natural size ; 3 a, calicle, natural 
size; plate 31, figs. 8a, 8b, different views of calicle, enlarged. — East Indies, 
Singapore. — Exp. Exp. 
25. Madrepora echidnjea {Lamarck,) Dana. — Broad cespitose (?), branch- 
lets proliferous and irregular, about 3 or 4 lines thick ; near the triticum in 
habit, but more slender. Corallum with the apical calicle much elongate ; 
the lateral close appressed, unequal, tubular, obtusely rostrate, often 3 to 4 
lines long, exterior smooth ; aperture minute, nearly circular ; star very dis- i 
tinct, two of the lamellsB nearly meeting below. | 
Plate 35, fig. 3, branch, natural size; 3a, calicle, natural size; plate 31, | J 
figs. 9 a, 9 6, different views of calicle, enlarged.— The East Indies. Sooloo j ^ 
Sea. — Exp. Exp. I ii 
26. Madrepora plantaginea {Lamarck). — Very broad cespitose, slightly | 1 
convex; branches horizontal, and coalescing into a flattened lamina nearly I i 
entire, naked below, and interrupted by an occasional break ; above, branch- | 
lets spiciform, 4 to 6 lines thick, and 2 to 2i inches long, and often proliferous | | 
and irregular. Corallum having the apical calicles a little prominent, and | 
broad (1 to H lines); the lateral, tubiforra, appressed, very unequal, often 2 ! 
lines long, and f of a line broad ; stout, with an obtuse lip, exterior very finely | 
striate, smooth ; aperture scarcely elliptical ; star quite distinct, two of the la- 
mellee most prominent, and nearly meeting below. 
The East Indies, and Singapore, Exp. Exp. — Ceylon, Rev. G. A. Apthorp. 
27. Madrepora cerealis {Lamarck ). — Broad cespitose, somewhat con- 
vex ; above, branchlets numerous, erect, spiciform, 3 to 4 lines thick, and 2 
inches long, proliferous, and not terete. Corallum having the apical calicles 
a little prominent, small (scarcely four-fifths of a line) ; the lateral, appressed 
subtubiform, unequal, 1 to 1| lines long, subrostrate, exterior smooth, aperture 
elliptical, star very short or imperfectly distinct ; two of the lamellae a little 
prominent. 
Plate 35, fig. 2, part of corallum, natural size; 2a, branchlets, ditto. — The 
Sooloo Sea, East Indies. — Exp. Exp. 
28. Madrepora acervata {Dana ). — Broad cespitose, a little convex, ex- 
terior branches nearly prostrate, and somewhat flattened below ; above, branch- 
lets 2 inches high, 5 to 8 lines thick, very proliferous, often acervate at apex, 
and subretuse. Corallum with the apical calicles very broad (H to 2 lines), 
scarcely exsert; the lateral crowded, appressed-tubiform, 1-li lines long, ex- 
terior rather smooth ; oblique at apex; lip thick, aperture elliptical; star very 
distinct, two of the lamellae nearly meeting below. 
