TRIBE I. ASTR^ACEA. 
53 
ii breadth, with the margin acute and usually sinuous. Corallum with the sur- 
j face even and not carinate ; lamellaB lax ; oririmes often 1| lines long. 
! Plate 22, fig. 7, a single leaf of the corallum, natural size. — East Indies. 
!j Sooloo Sea. — Exp. Exp. 
IV. Bifacial, folia planulate. 
11. Pavonia frondifera {Lamarck). — Subhemispherical ; folia bifacial, 
lobed ; lobes 1 to 3 inches broad (usually li inches), and hnes thick, flat 
and not crispate ; rounded at apex, often vertically coalescent and intersecting 
one another ; margin acute, thin. Corallum with the surface vertically cari- 
nate ; lamellae crowded, oririmes scarcely a line long, rarely seriate. 
The “ Austral Seas,” Peron ^ Lesueur . — The Feejees and Singapore, Exp. 
Exp. 
I 12. Pavonia decussata {Dana). — Subhemispherical, folia bifacial, rather 
i thin, broadly lobed to 4 inches), planulate and erect, often transversely coa- 
j lescent or intersecting one another (decussately aggregated): color umber, 
I polyps with the tentacles obsolete, bright green. Corallum rather fragile, with 
! the surface obsoletely carinate ; lamellse lax ; oririmes H lines long, subseriate. 
Plate 22, fig. 4, corallum, natural size ; 4 a, animals, enlarged ; 4 h, section 
of a plate. — Feejee Islands. — Exp. Exp. 
I 13. Pavonia lata {Dana ). — Very large, folia a foot broad, planulate or 
slightly undulate ; margin thin and sparingly lobed, i to f of an inch thick at 
base. Corallum with the margin fragile and surface not at all carinate ; 
lamellae lax ; oririmes a line and a half long, and rarely in transverse series. 
Plate 23, fig. I, outline view of corallum; la, part of the surface, natural 
size. — Feejee Islands. — Exp. Exp. 
14. Pavonia crassa {Dana ). — Very large, folia 6 to 9 inches broad, very 
stout, nearly flat or somewhat undulate or curved, few-lobed, erect and decus- 
sately aggregated, margin usually acute. Corallum firm, margin not fragile, 
surface not carinate ; lamellae crowded ; oririmes scarcely oblong, sometimes 
subseriate. 
Plate 23, fig. 2, corallum, natural size; 2a, surface of same, magnified; 
also, plate 24, 1, 1 a, another variety. — Feejee Islands and Singapore. — Exp. 
Exp. 
III. Glomerate. 
15. Pavonia siderea {Ellis ^ Solander,) Dana . — Sub globose. Corallum 
with the oririmes 3 to 4 lines distant, interstices scarcely elevated ; lamellae 
denticulate. 
West Indies ? 
16. Pavonia latistella {Dana). — Incrusting, nearly flat. Corallum with 
the oririmes nearly ^ an inch distant, interstices flat ; lamellae entire, undulate. 
Port Carteret, New Ireland . — Quoy ^ Gaymard. 
