998 MR. J. STANLEY GARDINER ON [DeC. 13, 



S. 2Ml'mata, but the corallites generally have their upper edges 

 projecting and acute. 



6. Sttlophora rtjgosa, n. sp. (Plate LXII. fig. 3.) 



Corallum consisting of more or less rounded branches, which at 

 their summits break up into a number of somewhat compressed 

 lobes. The branches have a diameter of about 2-2 cm. about 5 cm. 

 below their apices, while the lobes above are 2 to 3 cm. high, up 

 to 3 cm. broad by about 1 cm. thick. 



On the sides of the branches the upper edges of the calices are 

 exceedingly well developed, forming very acute prominent lips 

 about I'l mm. long. The coenenchyma is everywhere well 

 developed except between the terminal calices of the branches ; its 

 surface is covered by low blunt granular spines, which may be 

 very elongated on the edges of the lips of the calices. The calices 

 are very deep, about 1-2 mm. in diameter, and on the sides of the 

 brauehes usually 3 in 5 mm. 



The primary septa of the terminal calices of the branches are 

 usually very thin and smooth, fusing below with the thin promi- 

 nent styliform columella. In the side calices the primary septa are 

 thicker and rougher, but do not generally project far, nor can the 

 columella usually be distinguished. There are no distinct secondary 

 and tertiary septa projecting into the calices, but their positions 

 are indicated by larger and smaller flattened spinulous projec- 

 tions between the prominent upper edges of the primary septa, 

 giving to the lower calices of the stems the appearance as of a 

 raised edge. 



Funafuti ; outer reef. Eotuma ; outer reef. Two specimens. 



There are considerable differences between the two type speci- 

 mens. The lips of the calices are more elongated and broader in 

 the Funafuti specimen, while the calices themselves are more 

 crowded and sliglitly larger ; the whole corallum, too, is much less 

 heavy. These differences are, hovi^ever, I think, due to its more 

 vigorous and healthy growth. The corallum of the Funafuti 

 specimen is almost free from boring organisms, while it is in the 

 Eotuman colony bored through and through by Glione and annelids. 



The fractured surface of the Funafuti specimen shows very 

 well the mode of growth. The separate polyp-tubes can be seen 

 running at first almost vertically in the centre of the corallum, but 

 later turning abruptly outwards, after which they do not increase 

 in size. Fresh polyp-tubes can be seen to be budded off at their 

 sides, and have from the first almost the size of the adult polyp. 

 The tabulae are very well-marked and occur in the tubes at regular 

 intervals of about -5 mm. 



7. Sttlophora pistillata Esper. 



Stylophora pistillata, Esper, Pflanz. t. i. p. 73, Madr. pi. 60 

 (1767). 



Stylophora pistillnta, Klunzinger, Die Korallthiere des Rothen 

 Meex^es, Th. ii. p. 62, pi. vii, fig. 3, pi. viii. fig, 2. 



