16 
TRIBE I, ASTR.EACEA. 
rarely cylindrical, and f of an inch thick, generally laminato-compressed, 
sometimes 6 inches broad and 5 to 9 lines thick ; exterior smooth or in some 
parts finely striate and sometimes surface a little undulate, margin fragile ; 
lamellse crowded, very broad, entire, not exsert. 
Plate 6, fig. 4, part of a corallum, natural size; 4a, vertical section, show- 
ing the narrow bottom ; 4 b, transverse section, showing the cellular texture 
of the interior. — East Indies. — E-rp, Exp, 
13. EuPHYLLfA siNUOSA (Dana ). — Very large, hemispherical; disks com- 
pound, linear, and long meandering. Corallum similar to that of the mean- 
drina, but the sinuous cells longer, 4^ an inch broad, and the lamellae few and 
mostly ^ of an inch distant, entire, not exsert. 
14. Euphyllia cultrifera {Dana). — Large, convex, disks compound, 
linear, meandering. Corallum, with the cell f of an inch broad, some- 
times 5 inches long ; exterior nearly smooth or sparingly plicate, and faintly 
striate ; lamellae long exsert (sometimes f of an inch), and often ^ an inch 
broad. 
Plate 9, fig. 8 a, 8 6, showing the form of the lamellae. — East Indies. — Dr. 
A. Gould. 
Genus IL— CTENOPHYLLIA.— Dana. 
Animals explanato-glomerate ; disks seriately budding, and 
Pence linear and sinuous. Coralla substipitate, convex; cells 
trenclilike and meandering; lamellae very stout, few, subequal, 
entire or nearly so. 
1. Ctenophyllia pectinata {Lamarck,) Dana . — Corallum with the ridges 
sulcate, 5 to 6 lines wide; gyri sinuous, 6 to 7 lines broad, lamellae rounded, 
fossae 3 to 4 lines deep ; inferior surface smooth, except within ^ of an inch 
of the margin, where it is rugose and remotely striate. 
Plate 14, fig. 13, outline of the lamellae and trench. — West Indies. 
2. Ctenophyllia quadrata (Z)ana).— Corallum usually with sulcate sub- 
quadrate ridges, 3 to 4 lines broad ; gyri 4 to 5 lines broad, fossae 3 lines deep, 
septum often 1 line thick ; lower surface for i inch crimpled and striate. 
Plate 14, fig. 14, outline of the lamellae and trenches. — West Indies. 
3. Ctenophyllia pachyphylla {Ehrenberg.) Dana . — Corallum with the 
ridges entire. Gothic, rarely obsoletely sulcate, 5 to 6 lines wide ; gyri 5 to 8 
lines broad ; lamellae stout ; septum thin. 
Plate 14, fig. 15, outline of lamellae and trench. — West Indies. 
