330 ZOOPHYTES. 



scope the lamellae appear very thin, with the lateral surface granu- 

 lous. 



The texture of the corallum is more porous than in most of the 

 Pavonise, and at the margin it is consequently rather fragile. The 

 thickness is generally about one-eighth of an inch, though two to three 

 lines below. The less crowded lamellae, large oblong oririmes, and 

 scarcely carinate surface, distinguish this species from the frondifera. 



13. PAVONIA LATA. (Dana.} 



P. maxima, foliis pedattbus, planulatis out paulo undulatis, margine 

 tenuibus et parce lobatis, basi |-f " crassis. Corallum margine fra- 

 gile, superficie non minime carinatum ; lamettis laxis ; oririmis sesqui- 

 linearibus et raw seriatis. 



Very large, folia a foot broad, planulate or slightly undulate ; margin 

 thin and sparingly lobed, to f of an inch thick at base. Coral- 

 lum with the margin fragile and surface not at all carinate ; lamellee 

 lax; oririmes a line and a half long, and rarely in transverse series. 



Plate 23, fig. 1, outline view of corallum ; 1 a, part of the surface, 

 natural size. 



Feejee Islands. Exp. Exp. 



A frond of this species, in the Expedition collections, measures fif- 

 teen inches broad and ten inches high ; the margin is divided into a 

 few low broad lobes. On one side there is a smaller curved plate 

 attached nearly at right angles with the surface. Two inches from 

 the upper margin the frond is about one-third of an inch thick. As 

 the intermediate lamellee are much smaller than the others, the stars 

 have a very open appearance, as in the decussata, and even more 

 strikingly so. This species has much larger oririmes, more lax 

 lamellae, and a thinner and a more fragile corallum, than the crassa ; 

 and besides its larger size, it differs from the decussata also in its 

 coarser, stouter, and more open lamellae, and a broader oririme, with 

 a stony bottom distinctly in view. 



