50 
TRIBE I. ASTRiEACEA. 
2. PoLTPHYLLiA LEPTOPHTLLA {Ehretiberg), — Narrow oblong, above con- 
vex, and below concave, extremities rounded. Corallum f of an inch thick, 
oririmes very distinct and deep, often substellate, the medial seriate ; lamellae 
quite short (1^ to 2 lines), much prominent, very slenderly denticulate 
fragile, the marginal, 2 to 3 lines long. 
Plate 20, fig. 6a, form of the corallum; 66, c, outline of lamells. ^ ; 
3. PoLYPHYLLiA siGMOiDEs {Ehreuberg). — Narrow oblong, curving slightly^[| 
like the letter S, attenuate towards both extremities. Corallum with the la- 
mellae subsolitary, thinner and shorter than in the talpa; medial oririmes j 
seriate. 
4. PoLYPHYLLiA PELVIS {Quoy ^ Gaymavd). — Somewhat oblong, convex, 
below concave ; tentacles brownish-red, white at tip. Corallum thin, fragile ; 
lamellae unequal, denticulate, granulous ; in large specimens the medial ori- 
rimes subseriate. 
Port Carteret, New Holland, and also Vanikoro. — Quoy ^ Gaymard, 
II. Oririmes very conspicuous, no medial series. 
5. PoLYPHYLLiA FUNGiA [Dana). — Circular, convex, and below concave; 
polyps throughout scattered. Corallum rather stout (4 to 6 lines thick) ; ori- 
rimes deep, 1 to li lines broad ; lamellae not radiate, very prominent and thin, ^ 
inciso-denticulate, 3 to 5 lines long, and those of the margin 6 to 12 lines; - 
below crowdedly and throughout radiately echinulate. 
III. Oririmes indistinct, no medial series. 
6. PoLYPHYLLiA piLEiFORMis (Dana). — Very large, nearly hemispherical 
or cap-shape, at top very broadly rounded ; young specimens broad dish-shape. : 
Corallum thin (i of an inch), fragile; lamellae everywhere solitary, 2 to 3 - 
lines long; no distinct oririmes in any part. 
Plate 21, fig. 4, lamellae, natural size. — Feejee Islands. — Exp. Exp. 
7. PoLYPHYLLiA GALERiFORMis [Dana). — P. conico-hemisplierical, cap- 
shape, with the top narrow ; young specimens inverted neat cup-shape, hemi- 
spherical. Corallum quite thin (i of an inch), and fragile; lamellae every 
where solitary ; 1| to 2 lines long ; no distinct oririmes in any part. 
Plate 21, fig. 3, zoophyte expanded ; 3a, lamellae, natural size; 36, same, 
enlarged. — Feejee Islands. — Exp. Exp. 
Genus VI.— ZOOPILUS.— Dana. 
Free Fungidae, budding and explanate ; polyps every where 
scattered, mouths radiately seriate. Coralla with the larger la- 
