TRIBE I. ASTR.EACEA. 
49 
6. Herpetolithds crassus {Dana). — Narrow oblong, very stout, (at 
margin and at middle 1|- to inches thick,) broadly rounded at each extremity, 
much convex, and below concave ; color umber, tentacles very short, bright 
green. Corallum with the lamellae much crowded, not radiate ; spines below 
stout, 
Plate 20, fig. 5, zoophyte expanded, natural size ; 5 a, profile of section of 
corallum ; 5 c, outline of a lamella ; 5 6, a marginal lamella. — Feejee Islands, 
— Exp. Exp. 
Genus IV.— HALOMITEA.— Dana. 
Free Fungidas, budding and explanate; polyps throughout 
scattered (each with a separate circle of large tentacles?). Co^ 
ralla convex, oririmes large, every where scattered; lamellae 
short and stout (not less than half an inch), coarsely dentate, 
radiate ; under surface echinate. 
Halomitra pile us [Lamarck,) Dana. — Very large, hemispherico-conical. 
Corallum to ii inches thick, lamellae stout, strongly inciso-dentate, usually 
I- to f of an inch long (nearly l.f at the margin) ; under surface stoutly and 
very crowdedly radiately echinate. 
Plate 21, fig. 2, cross section ; 2 a, outline of lamellae ; 2 h, another variety. 
— East Indies and Pacific. The Feejees. — Exp. Exp. 
Genus V.~ POLYPHYLLIA.— Quoy & Gaymakd. 
Free Fungidae, budding and explanate ; polyps equal and 
throughout scattered, rarely remotely seriate along the medial 
line, crowded, with mouth and tentacles every where interspersed. 
Coralla with very short lamellae (less than half an inch long), 
denticulate, scattered or imperfectly radiate ; oririmes scattered, 
sometimes indistinct. 
I. A medial interrupted series of oririmes. 
1. PoLYPHYLLiA TALPA {BlainvUle). — Narrow oblong, convex, below con- 
cave. Corallum f of an inch thick, oririmes quite distinct, often obliquely 
substellate, the medial seriate ; lamellas short, mostly about i of an inch, but 
the marginal f of an inch, long. 
Plate 21, fig. 5 a, lamellae as they radiate from one side of an oririme; 5 b, 
c, outline of lamellco ; 5 d, marginal lamella. — East Indies.— 
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