536 MR. J. STANLEY G.UIDINEH ON FUNGID [June 21, 



generally thick, and often nnich fused together, bluntly and evenly 

 spiuulose at the free edges, more or less vertically ridged and 

 perforate. Gemmation anywhere over the septa. 



The species in the genus naturally fall into two divisions, 

 branching and massive. The former generally have very superficial 

 calices ; septa few, with a small number of large spines on the 

 free edges ; synapticula In'oad and reaching almost to the surface, 

 giving a rather sandy appearance to the corallum. Tlie massive 

 forms have deeper calices separated by colliues ; numerous septa 

 with a large number of small spines on the free edges. 



I. Branching forms. 



1. PsAMMOGOEA OBTtJSANGULA Lamarck. 



Pavonia ohtusanr/ula, Lamarck, Hist, des Auim. sans Vert. t. ii. 

 p. 240 (1816). 



Psammocora obtusangula, Dana, Zooph. p. 345. 



Psamniocora obtusaixjula, Edwards and Haime, Cor. iii. p. 220, 

 pi. E 3. fig. 3. 



There is one small dried specimen besides numerous spirit- 

 specimens of this species, which closely resemble Milne-Ed wards's 

 description and figure (3 h). In many of the calices there are 

 only eight septa, in some four thick and four thin, the latter 

 projectiug furthest into the calices. Colour of the living colony 

 green. 



Eotuma. 



2. Psammocora contigita Esper. 



Madrepora contiyua, Esper, Die Pflanz., Eorts. Th. i. p. 81, 

 tab. xlvi. (1797). 



Psammocora plicata, Dana, Zooph. p. 346, pi. xxv. fig. 2. 



Psammocora contigua, Edwards and Haime, Cor. iii. p. 220. 



There are two specimens of this species, which very closely 

 resemble Dana's figures and description. The colour of the living 

 colony was a light olive-brown. 



Funafuti ; lagoon reef. 



3. Psammocora gosagra Klunzinger. 



Psammocora gonagra, Klunzinger, Die Korall. des Eoth. Meeres, 

 p. 81, Taf. ix. fig. 1. 



I have referred three fragments to tin's species, which seem to 

 difiler from P. ohiusangida mainly in their less distinct calices, 

 more abundant synapticula and trabeculse, and thinner septa. 



Wakaya, Fiji ; outer reef. 



II. Massive forms. 



4. Psammocora haimiana EdvAards and Haime. (Plate XLA^. 

 fig. 1.) 



Psammocora haimiana,'Ed\\avds and Haime, Mouogr. des Pori tides, 

 p. 68, and Cor. iii. p. 221. 



