952 ON COEALS FROM THE S.W. PACIFIC OCEAN. [DeC. 14, 



of the base between the branches, where they are very crowded, 

 about '4 mm. Coenenchyma well developed, the calices at the 

 base of the branches being about their own diameter distant from 

 one another ; its surface is sparingly covered with low pointed 

 spines. The stereoplasm is little developed, and the cells can be 

 traced deep into the corallum. Septa 12, of which the primary 

 are more distinct, and meet the broad, low, somewhat rough and 

 spinulous columella. 



Funafuti ; outer reef. 



The larger specimen, on which this species is founded, is about 

 8 cms. in diameter by 4 cms. high, and is quite distinct from all 

 the other living species ; it seeras to form a connecting link to 

 P. madreporacea of Lamarck, a fossil species from the Miocene 

 formation of Turin. 



II. Grenus Seriatopoea, Lamarck. 



Seriatopora, Lamarck, Hist. Anim. sans Vert. ii. p. 282. 

 Seriatopora, Duncan, Eev. Madrep., Jour. Linn. Soc, Zool. 

 vol. xviii. p. 47. 



1. Seriatopoea pacifica, Briiggemann. 



Seriutopora p)acifica, Briiggemann, Ann. & Mag. Nat. Hist, 

 xix. 1877, p. 418. 



A small specimen resembles very closely the type specimen of 

 this species. Its branches are, however, rather more divaricate, 

 probably owing to their greater part having been killed by 

 incrusting nullipores. 



Rotuma ; boat-channel. 



NOTE. 



Since this paper was written examples of three more species 

 of Seriatopora have come to hand, viz. : — 



1. Seriatopora lineata (Linnaeus). 



Millipora lineata, Linnaeus, Syst. Nat. ed. xii. 1766, p. 1283. 



Seriatopora lineata, Klunziiiger, Die Korallthiere d. Eot. 

 Meeies, Th. ii. p. 71. 



The specimen of this species is a large branch, which appears to 

 have been broken off from a clump, and then to have gone on 

 growing as it lay, supported by its branchlets, on the sea-bottom ; 

 the broken end has been covered over by the budding of the 

 corallites round it, and two small branches have grown out, so 

 that the fracture is ainiotit completely obliterated. 



Sandal Bay, Lifu, Loyalty Islands ; 30-40 fathoms. 



2. Seriatopora confeeta, Quelch. 



Seriatopora covferta, Quelch, Challenger Eeport on Eeef-Corals, 

 p. 63, pi. ii. tig. 1. 



Funafuti ; 20 fathoms. A fragment. 



