TRIBE I. ASTR^ACEA. 295 



from one to one and a half lines in length, and are often irregularly 

 incised, and mostly with narrow acute intervals. A specimen from 

 Singapore, in the Expedition collections, is six and three quarters inches 

 across, with a thickness of half an inch at the margin, and one inch 

 at the centre, and the larger radii below, one-third to half an inch 

 apart: another, seen by the author, was seven inches in diameter, with 

 a concavity below, one and a half inches deep. 



The specimen represented by fig. 9, Plate 18, giving the animal, 

 has some peculiarities distinguishing it from those of the East Indies 

 (fig. 8), but yet, is probably identical with them; only a study of the 

 animals can determine the fact. It is neatly circular and flat, with 

 the lamellae more deeply inciso-dentate (about one-eighth of an inch); 

 and the dentation is as coarse where the lamellae first rise to the 

 surface, as afterwards; moreover, they rise more abruptly. Besides, 

 the lamellae are less unequal, and the corallurn has not so open an ap- 

 pearance. Below, the large echinate radiating lamellae are not so dis- 

 tant, and contrast less strongly with the surface between. The speci- 

 men measures five and three-fourths inches across, and two-thirds of 

 an inch in thickness. 



Madrepora echinata, Esper, Pflanz. i. tab. Madrepora echinata, Pallas, Zooph. 284. 

 2, fig. 1, a characteristic figure, showing 

 the under surface. 



8. FUNGIA REPANDA. (Dana.) 



F. grandis, suborbicularis, convexa aut planiuscula ; umbrina, tentaculis 

 albidis, minutis. Corallum lamellis crassis, non confertis, dentatis, 

 dentibus brevibus (non oblongis), scepe repandis; subtus super fide con- 

 fertim radiata et crassc papillosa, papillis crassis, rotundatis, et medio 

 non seriatis, confertis et minoribus. 



Large, suborbiculate, convex, and sometimes nearly flat ; umber-co- 

 loured, tentacles whitish, minute. Corallum with stout lamellae, 

 dentate, teeth short and not oblong nor crowded, often repand-den- 

 tate ; below crowdedly radiate and coarsely papillose, papillae stout 

 and rounded, and about the middle not seriate, crowded and smaller. 



Plate 19, fig. 1, animal expanded; 1 a, profile of section, showing 

 outline of lamellae ; 2, outline of a specimen from the Sooloo Sea; 3, a 

 large specimen from the Feejees. 



