1897.] PBOM THE S.W. PACIFIC OCEAK. 945 



The stereoplasm is well developed in the cells, causing the corallum 

 to be very dense and heavy. 



Eotuma ; outer reef. 



The one specimen shows a fusion between the branches 3'o cms. 

 below their summits, the branches arising from this being roughly 

 circular, 8-12 mms. in diameter. The other specimen, which is 

 only about 3 cms. high, seems to represent a young colony, the 

 grouth of which has been checked by the apices of its branches 

 reaching the low-tide level of the pit in the reef in which it 

 probably grew, as they are somewhat flattened, and the lateral 

 verrucse are much elongated. 



9. PociiLOPOEA LACEBA, YerriU. 



Pocillojjora lacera, VerrUl, Proc. Essex Inst. vol. vi. p. 100. 



A clump about 9 cms. in diameter by 5 cms. high was obtained, 

 which agrees closely with Verrill's short description. The verrucse 

 are few, narrow and elongate, and pass gradually into the 

 branchlets, which are from 5-10 mms. long. Lateral calices round 

 and shallow, -7 mm. in diameter, distant about half their diameter 

 from one another ; terminal calices 1 mm. in diameter, somewhat 

 angular in shape, thin-walled and deej). Septa 12 thin spiniform 

 lamellae ; columella a large round low spinulous projection. 

 Corallum dense; ca3nenchyma covered with low, somewhat 

 branched spines, which form distinct striations between the 

 calices. 



Eotuma ; outer reef. 



10. PociLLOPOEA CLATARiA (Ehrenberg). (Plate LVII. fig. 1.) 



PociUojjora clavaria, Ehrenberg, Die Corallenthiere des Eothen 

 Meeres, p. 128. 



I have referred a small clump 11 cms. in diameter by 5 eras, 

 high to this species. The colony consists of rather short branches, 

 which dichotomize regularly, and arise from a broad incrusting 

 base ; the branches, where they are given off, are about 13 mms. 

 in diameter, and are somewhat incrassate at their apices. The 

 brandies are covered with very obtuse verrucse about 3 mms. broad 

 at their bases by about 2-.5 mms. high ; on the sides of the branches 

 they are much appressed. In places between the terminal verrucse 

 of the branches the calices are angular and thin-walled, but on 

 the verrucse they are round, about 1 mm. in diameter, and relatively 

 thick-walled, the coenenchyma being generally well developed and 

 granular. The septa are very variable, in some calices being 

 indistinguishable, but in others represented by spinulous lamellae; 

 the two directive septa cannot generally be identified. Columella 

 small, distinct, and spinulous. 



Funafuti ; outer reef. 



11. PociLLOPOEA OBTtrsATA, n. sp. (Plate LVI. fig. 2.) 

 Corallum forming a low, broadly hemispherical mass, consisting 



