TRIBE I. ASTRJ3ACEA. 297 



Large, orbicular. Corallum with unequal lamellae, obsoletely denti- 

 culate ; below, remotely and unequally radiate, coarsely echinate, 

 spines often clustered, minute over a small space at the centre. 



Plate 19, fig. 4. 



The nearly entire lamellae, approximate this species to the agarici- 

 formis; but in the coarsely echinate remote radii of the under surface 

 it is very unlike that species, and approaches most nearly the echinata. 

 The large series of stout oblong spines below, are about one-third of 

 an inch apart, and between them are others much smaller and crowded. 

 The lateral surface of the lamellae is very finely vertically plicate. A 

 specimen examined by the author measured six inches in diameter, 

 and was an inch thick at centre, with the oririme a little above an 

 inch long. 



10. FUNGIA CONFERTIFOLIA. (Dana.} 



F. grandis, suborbicularis, convexa, subtus paulo concava, CoraUum 

 lamettis confertis, subcequalibus, undulatis, dentatis out subrepando- 

 dentatis, dentibus brevibus et subacutis; dentibus tentaculatis obsoletis ; 

 subtus siiperficie lamelk-radiatu, confertim et crasse echinata, spinis 

 oblongis, medio paucioribus. 



Large, suborbicular, convex, below a little concave. Corallum with 

 the lamellae crowded, subequal, undulate, dentate, or subrepando- 

 dentate; teeth short and subacute, tentacular teeth obsolete: below 

 somewhat lamello-radiate, rays crowded and coarsely echinate, about 

 the middle less crowded. 



Plate 19, fig. 5. 



Feejee Islands. Exp. Exp. 



The crowded, nearly even, undulate lamellae of this species at once 

 distinguish it from all the preceding; it resembles most the dentigera, 

 but has not the tentacular teeth of that species, and is not so finely 

 denticulate. About seventeen large lamellee may be counted in a 

 breadth of an inch. One large specimen in the collections is slightly 

 elliptical, and measures eleven inches by nine and a half, with a thick- 

 ness of one and a quarter inches at centre and three-quarters of an inch 



75 



