436 POLYPI. VAGINATI. 



Gen. 43. ADEONA, Lam. 



Almost stony, caulescent, frondescent or fan-shaped ; stem sub- 

 articulated, with the joints obscurely granulated, and with fo- 

 liaceous expansions covered with cells on both sides ; cells 

 very small, crowded in a series or in quincunx order, and the 

 osculi round. 



A. foliifera, Lam. Stem subramose, leafy, the leaves lacinio-pal- 

 mate, with the lobes oblong, subacute, unequal. Inhabits seas of 

 New Holland Lam. ii. 179. 



Gen. 44. ESCHAR A, Lam. Millepora, Lin. 

 Almost stony, not flexible, with flattened lamelliform expan- 

 sions, thin, fragile, very porous interiorly, entire or divided ; 

 cells of the polypi disposed in quincunx order on both sides. 



The substance of the mass in this genus, though less of a stony hardness than the 

 Milleporae, are yet sufficiently distinct from the genus Flustra, the species of which 

 are distinctly flexible, and have cells of a very different form. Pallas, however, 

 comprehended them among the Flustrce. 



JZ.foliacea, Lam. Lamellar, conglomerated; laminae numerous, flex- 

 uose, and coalescing; pores very small, rounded, and separate. 

 Inhabits European seas Ellis, Cor. pi. 30, No. 3, fig. a, A, B, C. 



E. cervicornis, Lam. Much branched, subcompressed, branches 

 narrow ; pores prominent, nearly tubular. Inhabits Mediterra- 

 nean sea. Ellis, Zooph. 134. 



Gen. 45. CELLEPORA, Lam. Millepora, Ellis. 

 Almost stony, porous interiorly, extended in a raised and leafy 

 crust; expansions flattened, lobed or branching, subconvo- 

 lute, not flexible, celluliferous on the external surface ; cells 

 urceolate, submembranous, gibbous, slightly projecting, conti- 

 guous, confused, with the mouth constricted. 



The polypiferous crust in this genus is flexible when recent and in the water, but 

 when dried is fragile. The Celleporas incrust the different marine bodies upon which 

 they are found ; but some form elevated leafy and sinuous expansions. 



C. pumicosa, Lam. Incrusting marine bodies, with the expansions 

 convolute, tubular, or branching ; the external surface crowded 

 with irregular, ventricose, and scabrous cells. Inhabits European 

 seas. Ellis, Coral, pi. 27, No. 4, fig./, F. 



C. spongites, Lin. Base incrusting stones, &c. ; expansions tubu- 

 lar, turbinated, irregular, variously divided, and coalescent ; cells 

 in a series, gibbous in the middle, the mouths suborbicular. In- 

 habits Mediterranean sea. Ellis, Zooph. pi. 41, fig. 3. 



Gen. 46. DISCOPORA, Lam. Cellepora, Lin. 

 Subcrustaceous, flattened, extended in a waved, discoid, stony 

 plate, with the upper surface cellular ; cells numerous, small, 

 short, contiguous, regularly disposed in subquincunx rows, 

 with the openings not constricted. 



D. verrucosa, Lam. Crustaceous, lamelliform, suborbicular^ waved : 



