TRIBE III. MADREPORACEA. 461 



apice valde proliferis scepe acervatis, et subretusis. CoraUum caliculo 

 apicali latissimo (li-2'"), vix exserto, lateralibus confertis, appresso- 

 tubiformibus, 1-1^'" longis, extus subkvibus, apice obliquis, labio in- 

 crassato, apertura elliptica, stelld bene conspicud, duabus lamdlis infra 

 fere conniventibus. 



Broad cespitose, a littlaconvex, exterior branches nearly prostrate, and 

 somewhat flattened below ; above, branchlets 2 inches high, 5 to 8 

 lines thick, very proliferous, often acervate at apex, and subretuse. 

 CoraUum with the apical calicles very broad (1 to 2 lines), scarcely 

 exsert; the lateral crowded, appressed-tubiform, 1-1J lines long, 

 exterior rather smooth ; oblique at apex ; lip thick, aperture ellip- 

 tical ; star very distinct, two of the lamellfe nearly meeting below. 



Plate 34, fig. 43, branchlet, natural size. 



Singapore, East Indies. Exp. Exp. 



This species is low spreading cespitose, with the extremities of the 

 branchlets often proliferous and much enlarged, or terminating in two, 

 three, or more broad apical calicles. The apical calicles are scarcely 

 at all exsert, and contain a cell hardly one-fourth the diameter ; the 

 texture appears spongy. The lateral calicles are much smaller than 

 in the valida, and are distinctly striated. 



29. MADREPORA VALIDA. (Dana.) 



M. cespitosa, ramulis subdigitiformibus, irregularibus, 2J" longis, et 

 6-8'" crassis, ruditer proliferis, polypis maximis. CoraUum caliculis 

 lateralibus incequalibus, appresso-tubiformibus, crassimis et maximis, 

 2-4'" longis, et 1'" latis, extus kvibus ; stelld paulum conspicud, duabus 

 lamellis infra conniventibus. 



Cespitose, branchlets subdigitiform, very uneven, 2J inches long and 

 6 to 8 lines thick, rudely proliferous, polyps quite large. CoraUum 

 having the lateral calicles unequal, appressed-tubiform, very stout, 

 and large, 2 to 4 lines long, and 1 line broad, exterior smooth; star 

 rather distinct, two of the lamella? meeting below. 



Plate 35, fig. 1, corallum, natural size. 



116 



