40 
TRIBE I. ASTR^ACEA. 
13 cf, vertical section, enlarged ; 13 e, polyps injured, and part of the white 
cords and lamella extruded ; 13 /, the same extruded from the mouth. — East | 
Indies and Pacific Ocean. Feejee Islands. — Exp. Exp. 
2. Monticularia lobata {Lamarck). — Incrusting and prominently gib- . ^ 
gous or gibboso-lobate, with the lobes erect, f to 2 inches thick, and nearly ; j 
flat at top, Corallum light cellular; conelets crowded, unequal, compressed, 
especially so over the apex, where they are nearly 2 lines high ; lamellas sub- 
serrulate. 
East Indies. | 
3. Monticularia poltgonata [Lamarck). — Glomerato-lobate, subramose. | 
Corallum with the conelets crowded, compressed, unequal; lamellae serrulate. 
Japan. ’ I 
Genus X.— PHYLLASTK^A.— Dana. 
. \ 
Explanate AstrseidaB, foliaceous ; polyps prominent and open* ' 
ing upward. Coralla striated, scarcely echinulate ; calicles large 4 
and laterally attached to the folia. j| 
Phyllastrjea tubifex [Dana). — Foliaceous, erect, unifacial, often later- ' 
ally revolute and united by the vertical margins, thus forming large tubes ; j 
fuscous, disks bright-green, tentacles numerous. Corallum thin, margin fragile ; i 
surface vertically striate, striae coarse, unequal, and scabrous ; calicles very . ! 
prominent, i of an inch broad, opening upward ; lamellae few and stout, often 
distorted. | 
Plate 16, fig. 4, the zoophyte, natural size, with the polyps unexpanded ; ; ' 
4 a,- enlarged view of polyp, partly expanded; 4 6, cells and surface of coral- lii 
lum, natural size.— -Feejee Islands. — Exp. Exp. 
Genus XI. — MEEULINA. — Ehrenberg. 
■ 
Thin explanate or cumulato-ramose ; polyps very small, disks | 
usually budding seriately (as in the Meandrincp\ the disks and | 
ridges therefore linear, venosely furcate, or reticulate. Coralla t 
nearly solid ; lamellae quite small, oblique. | 
I. Explanate MeruliiuB. % 
1. Merulina ampliata {Lamarck,) Ehrenherf^. — Broad explanate, variously ||j 
undulate and with the margin lobed, unifacial. Corallum with the ridges * 
rounded, scarcely a line high, often reticulately coalescent and enclosing ob- e 
iique cells; lamellae even, serrulate. ft; 
