1897.] FKOM THE S.W. PACIFIC OCEAN. 951 



the same size, very deep, angular, and tbin-walled, but generally 

 between the verrucse and low down in the colony they are round, 

 about "8 min. in diameter. The cojnenchyma is well developed, 

 and near the base of the colony generally separates the calices by 

 about half their diameter ; the surface is covered by low spines, 

 which may form striations between the calices. The stereoplasm 

 is usually little developed. Commonly 12 septa and a small 

 cohimella can be distinguished, but the primary are often very 

 distinct spiny lamellaB, one directive prolonged to meet a small, 

 prominent columella, or both septa and columella may be indis- 

 tinct. The living colony is colourless, pink or green. 



Funafuti; outer reef. Eotuma; outer reef and 2 fathoms. 

 Lifu, Loyalty Islands, 



I have retained the name of P. grandis for this species to avoid 

 a synonym, as I have no doubt that it is the same species as Dana 

 described under this name. The colonies grow in the fissures of 

 the outer reef in great abundance, and, where their branches 

 reach and project above low tide, they tend to be thickened, 

 flattened above, and bare. There is a good series between 

 F. elongnta of Dana and F. grandis, and some smaller specimens 

 resemble closely F. elegans of Dana, so that I have been compelled 

 to unite these species ; in the description of /-'. eydouxi there do 

 not seem to be any characters which would serve to separate it 

 either. The same specimen is often in places very diverse in its 

 growth and in the arrangement of its septa and columella, so that 



1 do not think the differentiation of varieties advisable. I have 

 referred to the same species a small incmsting clump 7 cms. 

 broad by 3 cms. high, found in the breakers at Eotuma ; its 

 verrucse and cells are similar to the type, and it seems to be the 

 much stunted commencement of a colony. 



The specimen nearest to P. elongata (Plate LVII. fig. 3) is a 

 branch 21 cms. long by 3-4 cms. broad ; its septa and columella 

 are very distinct. It was growing out from under the overhanging 

 edge of a fissure in the reef, and has its side towards the rock 

 almost bare of verrucre, which, however, cover the opposite side 

 very evenly. There are two small branches coming off, which 

 subdivide into numerous smaller branchlets, giving them quite a 

 bushy appearance. Their verrucse are larger than in the main 

 branch ; their calices, however, are of the same size and have a 

 distinct star and columella, but the ccenenchyma between them is 

 generally more developed. 



20. POCILLOPOEA GLOMEEATA, n. sp. (Plate LVI. fig. 1.) 



Corallum a low, glomerate, slightly hemispherical, semi-incrusting 

 mass, with a few lobe-like, somewhat compressed branches up to 



2 cms. in length, 10-15 mms. thick. The apices and sides of the 

 branches are generally bare, but some are sparingly covered by 

 low, round, much appressed verrucse. Calices of the verruca 

 1-1-2 mms. in diameter, round and rather deep, of the apices of 

 the branches about -8 mm., usually angular and thin-walled, and 



