206 PAPERS FROM THE DEPARTMENT OF MARINE BIOLOGY. 



The other specimen (see plate 92, figs. 2, 2a) has more compressed branches 

 and the calices, especially on one side, are more excavated. On both kinds of coral- 

 lum near the base of the living tissue the calices are superficial; the columellar 

 tubercle, 8 pali, and the septal denticles are distinct; and an echinulate-striate 

 reticulum may be developed between the calices. It seems to me that the Porites 

 described by Bernard from Cocos-Keeling {op. cit., p. 196, plate 30, fig. 1) may 

 belong to this species. 



Habitat, etc., Cocos-Keeling Islands. — Dr. Wood Jones contributes the follow- 

 ing notes: 



"Fragments from the deeper portions of the lagoon. Not very abundant. In the 

 inlets to the lagoon all sorts of debased branching and amorphous forms are to be found. Its 

 color is grayish, sometimes with a greenish tinge. When dead it turns black. There is 

 about this coral a peculiar smooth sliminess which is very distinct. It becomes extremely 

 moist and sticky when dead and it stinks horribly not only when dead but even when 

 exposed to sun and air by low tides." 



Distribution. — From Cocos-Keeling to Fiji Islands. 



Subclass ALCYONARIA Milne Edwards and Haime. 



Family TUBIPORIDjE Milne Edwards and Haime. 



Genus TUBIPORA Linnanis. 



Tubipora musica Linnaeus. 



1857. Tubipora musica Milne Edwards and Haime, Hist. nat. Corall., vol. I, p. 132. 



I am referring a series of specimens, collected by Dr. Mayer, to this species 

 because the usual diameter of the corallites is 1.5 mm. The number to 1 centi- 

 meter is 5 to 6, rarely 4. The species may be T. purpurea, which has corallites 

 nearly 2 mm. in diameter. 



Obtained from stations at Murray Island, southeast reef, line I, 400, 600, 800, 

 1,000, and 1,600 feet from shore. 



Class HYDROZOA. 



Order HYDROCORALLINiE Moseley. 1 



Family MZLLEPORID^; L. Agassiz. 



Genus MTLLEPORA Linnaeus. 



Hickson may be correct in his conclusion, which he expressed as follows: 



"It appears to me that these investigations present very strong reasons for believing 



that there is only one species of Millepora. That one species must, on the ground of priority, 



be called Millepora alcicornis." 2 



But it is at least convenient, if not systematically sound, to recognize by 



distinctive names the different aspects presented by colonies. In the names here 



applied I have followed Dana and Klunzinger, without any attempt to go farther 



into questions of synonymy. 



Millepora dichotoma Forskal. 



Plate 93, figure I, specimen from Cocos-Keeling Islands. 



1879. Millepora dichotoma Klunzinger, Korall. Roth. Meer., pt. 3, p. 86. 



1910. Millepora (of the type named alcicornis) Wood Jones, Coral and Atolls, p. 103, text-fig. 35. 



The following are Dr. Wood Jones's notes: 



"The characteristics of this form are (1) its color is almost always yellow, with the 

 apices of the branches white, (2) when dead it bleaches pure white, (3) its stings are very 

 severe, (4) it lives on the landward margin of the barrier." 



'Although these are not corals, notes on them are included because of their importance as reef-builders. 

 'Proc. Zool. Soc. London for 1898, p. 256, 1898. 



