TRIBE III. MADREPORACEA. 
105 
ramose, branchlets subacute; surface smooth. Corallum having the cells 
rather large, and very numerous. 
West Indies. — M. moniliformis, D., a Millepora in disjointed pieces incrust- 
ing axes of Gorgoniae, W. Indies. ^ 
2. Millepora ramosa {Pallas). — Lax, ramose, branches every way divar- 
icate and long flexuous, nearly terete, ^ to i an inch thick, remotely coales- 
cent, attenuated above, and subacute at apex. Corallum having the cells 
quite minute and scattered. 
3. Millepora pumila {Dana). — Small (1 to 2 inches), cespitose, slenderly 
palmato-ramose, branches about one and a half lines broad ; branchlets mostly 
straight and simple, truncate, slender, many i an inch long, others very short. 
Plate 52, fig. 4, corallum, natural size.— The harbor of Carthagena, east 
coast of South America. — T. R. Peale. 
4. Millepora tortuosa {Dana). — Cespitose, much and slenderly ramose, 
branches compressed, mostly subdigitate, often crowdedly intricate and tortu- 
ous, sometimes in a single plane and reticulately coalescent; branchlets flexu- 
ous, li to 2 lines broad, compressed, obtuse, not acuminate. Corallum with 
the ceils very minute. 
Plate 52, figs. 3, 3 a, different varieties, natural size ; 3 h, extremity of 
branch, shov/ing the minute cells.— Feejee Islands. — Rxp. Exp. 
II. Lamellate or glomerate, never ramose nor digitato-lohate. 
5. Millepora plicata {Esper). — Large, neatly lamellate, erect, thin, above 
for several inches from the margin ^ of an inch, and at apex acute ; inciso- 
lobate, sometimes coalescent ; lateral surface minutely rugose, and vertically 
carinate. 
West Indies (Surinam). 
6. Millepora complanata {Lamarck). — Very broad lamellate, smooth; 
fronds erect, surface plane, apex somewhat subdivided, subplicate, round- 
truncate. 
West Indies. — Lamarck. 
7. Millepora squarrosa (LamarcA:).— Sublamellate, fronds erect, verru- 
cose at base ; sides vertically lameiliferous, lamellae subremote. 
Var. incrassata, pi. 53, f. 1, Raraka I., Paumotus. 
8. Millepora platyphylla {Ehrenberg). — Spreading at base, lamellate 
fronds erect, very broad, 10 inches high, sides lameiliferous and coalescent 
(and hence zoophytes reticulate with intervals 4 to 6 inches broad), acute at 
summit; surface smooth, obsoletely tuberculous, tubercles hemispherical, 
nearly equal. 
Red Sea, Ehrenberg.— Feejees, Exp. Exp.—PMe 52, fig. 5. 
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