324 ,DR. G. J. HINDE. 



the boring it is fairly common and some specimens are in their position of growth. 

 It is also present in the Lagoon Boring. Only one species, C. dcedcdea, Ell. and Sol., 

 has been determined. According to J. S. Gardiner,* the genus is very abundant on 

 the lagoon shoals and also at a depth of 7 fathoms on the outer reefs at Funafuti, 

 and three species are recorded. 



Genus Astr^a, Lam. 



This genus extends throughout the Main Boring, but it is of rare occurrence until 

 reaching a depth of 845 feet ; from this to the bottom of the boring it is common. 

 Two species have been recognised, A. denticulata, Ell. and Soll., and A. lohata, 

 M.-Ed. and H., both of which are now living in the lagoon and outer reefs of 

 Funafuti. 



Genus Goniastr^ea, M.-Ed. and H. 

 A specimen of the genus occurs at the depth of 210 feet in the Main Boring, no 

 other forms have been noticed till reaching 765 feet ; from this to nearly the bottom 

 of the boring it is present at intervals. Two species have been determined, one 

 G. solida, Blainv., the other is closely allied to (jr, eximia, Dana. No living forms 

 have been recorded at Funafuti. 



Genus PRroNASTR.EA, M.-Ed. and H. 



A cast ot a specimen referred with doubt to this genus has been met with in the 

 Main Boring at 531 feet, below this the genus is represented sparsely at long intervals 

 do\\ n to 1025 feet. Some forms apjiroach closely to P. magnified, Blainv, 

 J. S. GARDiNERt has determined a living species at Funafuti. 



Genus Orbicella, Dana. 



'J'his i^eniis is found rarely in the Main Borintj; l)etween 82-9 1 4 feet ; below this to 

 the bottom of the boring it occurs frequently. It is also not micommon in the First 

 and Second Borings. O. heliopora, Lam. and 0. pleiade,s, Ell. and Sol. have 

 been determined; other forms are allied to O. acropora, Linn., O. avion, Dana, and 

 0. fun af at en sis, Gard. J. S. Gardiner^ has described seven species now living on 

 the leeward reef and in the lagoon at Funafuti. 



Genus Hydnophora, M.-Ed. and H. 



Oasts of three examples of the genus have been met with in the Main Boring 

 between (542 and 921 feet. One belongs to H. microcona, Lam., which has also been 

 recognised by J. S. Gardiner§ in the lagoon shoals at Funafuti. 



* 'Zool. Soc. Proc.,' 1899, pp. 740-744. 

 t Ibid., p. 760. 

 I Ibid., pp. 752-757. 

 Ibid., p. 744. 



