TRIBE I. ASTR^EACEA. 161 



transverse rubro-vittato ; tentaculis numerosis, attenuatis, diaphanis, 

 apice carneis. CoraUum extus leve, concentrice subplicatum; cella pro- 

 funda, oblongo-eUiptica, apertura ad eztremitates bene rotundatd ; 

 lamettis integris, regularibus, inczqualibus, truncatis, non exsertis. 



Not budding, free, cuneiform, in outline inverted deltoid, with the 

 summit arcuate, and truncate at base ; flesh-coloured and greenish- 

 yellow ; mouth very long, disk transversely banded with red, ten- 

 tacles numerous, attenuate, diaphanous, with flesh-coloured tips. 

 Corallum smooth without, very faintly concentrically plicate; cell 

 deep, oblong-elliptic, with the aperture regularly rounded at each 

 end ; lamellae entire and regular, unequal, truncate, not exsert. 



Plate 6, fig. 1 o, animal unexpanded, showing the partly-opened 

 oblong mouth, with the vertically-plaited inner surface of the lips ; 

 1 b, animal expanded ; 1 c, one of the tentacles; 1 d, profile section of 

 corallum ; 1 e, a small specimen, with side processes. 



Coral reefs, Singapore, East Indies, in two to three fathoms water. 

 Exp. Exp. 



This species is distinguished from the rubra by its very symmetri- 

 cal outline ; it is about one and a quarter inches by five lines in 

 breadth at top, and the sides converge downward evenly to an edge 

 at bottom half an inch long, this edge having been produced by a 

 fracture of the pedicel when young. 



The lamellaB have a straight margin, and three smaller lamella 

 alternate with a larger. The exterior is smooth without vertical 

 striaB. At bottom, the cell is a mere line. 



This very common species has evidently been confounded with the Turbinolia rubra 

 of Quoy and Gaymard, which was named Caryophyllia compressa, by Blainville ; also, 

 with the Turbinolia compressa of Lamarck, which is a fossil species, more oblong-trian- 

 gular, and tapering below nearly to a point. (See Lamouroux, Exp. Meth. des Polyp. 

 51, pi. 74, figs. 22, 23.) The Turbinolia cuneata is distinguished from this species by 

 nearly the same characters as the compressa. (See Turlrinolia cuneata,, Gold fuss, Petref. 

 53, pi. 15, fig. 9, a, b, and Flabellum cuneatum, Michelin, Icon. Zooph., 45, pi. 9, 

 fig. 13.) 



4. EUPHYLLIA RUBRA. (Q. $ G.) Dana. 

 E. simplicissima, affixa, subcuneiformis, infra paulo distorta, superne 



41 



