﻿76 MADEEPORARIA. 



"reater part of the coral rises into almost spherical masses divided into lobes which are again 

 further divided into smaller lobules, very much like the peculiar specialisation of M. lolndata. 

 Indeed, I was inclined to unite them on account of the close similarity existing between this 

 portion of specimen 6 and the whole corallum of that type (see below). 



a, b. Maiuitius. (Types.) 



56. Montipora flammans. (PI. XX., in the centre oi 3L dance.) 



Desmiption. — Corallum a thin (3 to 4 mm.) encrusting sheet with free edge (2 mm. thick), 

 supported by cpitheca. Successive layers cover one another. 



Calicles very minute. The pinhole-like calicular apertm-es appear to be rather less than 

 0*25 mm. in diameter, and average about 1 mm. apart. They are sharply circumscribed by 

 the flakes of the reticulum Avhich are cut out in the form of the aperture with its twelve 

 septa. The si.\ primaries (two directives well developed) are more pronounced than the 

 secondaries. 



The CQjnenchyma consists of a flaky reticulum, which in part lies quite flat, having the 

 appearance of a patchy wliite membrane in which the calicular apertures are sharply cut out. 

 In the more vigorously growing portions, the reticidum rises up like branching flames from 

 the interstitial spaces, giving a general appearance closely similar to that described for the 

 explanate portions of M. lanugirtosa. 



I was in some doubt whether this should be separated from M. lanuginosa, which it 

 somewhat resembles. Close examination of the calicles, however, made it necessary to 

 describe them apart. Further, while the woolly surface is superficially alike in both, there is 

 no tendency to form such pronounced papillae in this type as in M. lanuginosa. 



The single specimen in the collection has been grown over by the vigorous expanding 

 growth of Montipora danw. In the figure of that type (PI. XX.) a small portion of M.fiamraans 

 can be seen rising up in the centre and intertwining with the larger coral as if struggling for 

 the mastery. The greater part of it is concealed imder the latter. Examination of this 

 hidden portion shows several previous growths, so that the stock was an old and important 

 one before the larger coral settled upon it. 



a. Port Darwin, Great Barrier Eeef ' Coll. Saville-Kent. (Type.) 



(■v^-ith M. dan a;). 



57. Montipora lobulata. (PI. XIV. ; PI. XVI. fig. 1 ; PI. XXXIII. fig. 1). 



Description. — CoraUum may form a compact convex mound of large rounded lobes, 

 irregularly fused, but with deep cavities between, or a straggling, shapeless, lobate mass. The 

 surface of the large roimded lobes is divided into secondary smaller lobes separated by smooth 



