MEANDRINA. POLYPI. 431 



per surface rough with elevated pyramidal stellae ; stars coni- 

 cal, with a solid central axis, simple or dilated, around which 

 the radiating laminae adhere. 



M. folium, Lam. Flattened, foliaceous, lobed, subconcave ; cones 

 unequal, smaller in the disc, dilated and compressed on the mar- 

 gin ; under surface radiated. Inhabits Indian seas. Lam. ii. 250. 

 There are several fossil species of this genus. 



Gen. 22. MEANDRINA, Lam. Madrepora, Lin. 

 Fixed, stony, forming a simple convex or hemispherical mass ; 

 surface convex, occupied by compartments more or less hol- 

 low, sinuous, and furnished on each side with transverse pa- 

 rallel plates which adhere to the raised crests. 



M. labyrintkica, Lam. Hemispherical ; whorls long, tortuous, with 

 the base dilated ; eminences simple, subacute. Inhabits Ame- 

 rican seas. Ellis, Zooph. pi. 46, fig. 3, 4. Plate 8, Jig. 10. 



M. N cerebriformis, Lam. Subspherical j whorls tortuous, elongated; 

 lamellae dilated at the base and denticulated ; eminences trunca- 

 ted, sub-bicarinated. American seas. Shaw, Nat. Mis.iv. pi. 118. 



Gen. 23. AGARICIA, Lam. Madrepora, Pall. 

 Fixed, stony, with flattened subfoliaceous expansions, and one 

 surface furnished with furrows or stelliferous wrinkles ; stars 

 lamellar, sessile, often imperfect and indistinct. 



A. ampliata, Lam. Foliations fan-shaped, longitudinally rugose ; 

 rugae carinated, laniellose, serrated, rough ; stars in small num- 

 ber, and imperfect, Indian seas Ellis, Zooph. pi. 41, fig. 1, 2. 



Gen. 24. PAVONIA, Lam. Madrepora, Lin. 

 Fixed, stony, frondescent, with flattened subfoliaceous lobes, 

 straight or ascending, having the two surfaces furnished with 

 grooves or stelliferous wrinkles ; stars lamellar, sessile, more 

 or less imperfect. 



P. agaricites, Lam. Fronds short, thick, semi-rotund, diffuse ; wrin- 

 kles stelliferous, acute, transverse flexuose. Inhabits American 

 seas Ellis, Zooph. pi. 63. 



2. Stars terminal. 



Gen. 25. FUNGIA, Lam. Madrepora, Lin. 

 Stony, free, simple, orbicular or oblong, convex and lamellar 

 above, with an oblong hollow in the centre ; concave and un- 

 even below; one lamellar subproliferous star on the upper 

 surface, with the laminae dentated or spinous laterally. 



F. agariciformis, Lam. (M. fungiles, Lin.) Orbicular, scabrous 

 below ; stars convex, lamellae unequal, denticulated, the greater 

 number radiated longitudinally. Inhabits Red and Indian Seas. 

 Ellis, Zooph. pi. 28, fig. 5, 6. 



