TRIBE III. MADREPORACEA. 499 



scattered cells, and long tubular appressed calicles. This last-men- 

 tioned character distinguishes the species from the patiniformis of 

 Esper, and also from the following. The specimen in the collections 

 measures sixteen inches by twelve in breadth, and six inches in height. 



12. MANOPORA GRANDIFOLIA. (Dana.) 



M. tenui-foliacea (!"' crassa},fere erecta, lata et subflabellata, margine 

 pauci-lobata; extus 5-6" animata ; tentaculis complanatis, brevibus, 

 lutescentibus, disco pallide cinereo, lineis 12 albis radiatim notato. Co- 

 rallum fragile, spinuloso-asperum et expansae affine; cettis minutis 

 (J'") ; scepe sub-obvallatis ; subtus, caliculis brevissimis, confertis, mar- 

 gine acutis. 



Thin, foliaceous (l lines thick), nearly erect, broad, and subflabellate ; 

 margin sparingly lobed ; exterior alive for five or six inches from 

 the edge ; tentacles flattened, short, yellowish ; disk pale ash-colour, 

 and marked with 12 white radiating lines. Corallum fragile, spinu- 

 loso-asperate, and resembling that of the expansa; cells minute ( of 

 a line), often imperfectly obvallate ; outer surface covered crowdedly 

 with very short obsolescent calicles, having acute margins. 



Plate 45, fig. 1, natural size; 1 a, the animal enlarged; 1 a', the 

 natural size of the same ; 1 b, upper and under surface of the corallum, 

 natural size ; 1 c, upper surface, magnified ; 1 d, part of a transverse 

 section of the corallum, magnified twelve diameters. 



Singapore, East Indies. Exp. Exp. 



The folia grow nearly erect, in clusters, and somewhat convoluted. 

 In this respect, and in the cells of the exterior surface, the species 

 differ decidedly from the expansa, although hardly distinguishable in 

 the character of the upper surface. The polyps are quite different in 

 form as well as colour. One of the specimens is fifteen inches high, 

 and nine broad ; it is very thin and fragile throughout, and thus dif- 

 fers from the patiniformis of Esper. 



