220 Christmas Island. 



a fourth incomplete orders of septa. The corallites do not exhibit 

 any tendency towards a serial arrangement, and the calices are 

 polygonal. 



The species must be compared with two living species, whose 

 characters are as follows : — 



Dia. of Xo. of 



corallites. septa. Columella. Calices. 



australensis, Ed. & H. 10 mm, 36-38 rudimentary oblong; sometimes 



in short series. 

 magnifica, 'Ely. ... 10 ,, 34 well developed polygonal. 



A transverse section of the Christmas Island coral is figured as 

 Pig. 4, and it appears to be a typical form of P. magnifica. Two 

 well-preserved specimens of the same species were collected by 

 !Mr. Andrews from the existing reefs. The fossil was found in the 

 limestones of the sea cliif, at the mouth of Sidney's Dale. 



Von Reuss ^ has described as P. duhia an allied species from the 

 Javan Miocene. 



AnisocoBnia murrayi, sp.n. 



Diagnosis. — Corallum massive. Corallites large, about 15 mm. 

 in diameter, and closelj' united. Septa in five orders : those 

 belonging to the different orders are of proportional lengths. 

 The primary and secondary septa have internally thickened 

 palifoi-m lobes ; the primary septa, in fact, appear clavate. 



Distribution. — Orbitoidal Limestone of the central nucleus of the 

 island, from fallen blocks from high cliff (400 feet) at south end 

 of Flj-ing Fish Cove (IN'o. 964). 



Figure. — PI. XIX, Pig. 7. Part of a transverse section, X 2 dia. 



Affinities. — This interesting coral is represented by one specimen 

 in a compact and apparently structureless limestone. The coral is, 

 however, well shown in thin sections. Its nearest ally is the 

 Miocene Anisoccenia crassisepta, Peuss,- from which it differs by 

 having the corallites more than twice the size ; von Eeuss gives 

 their diameter as 7 mm. 



Anisoccenia favoides, sp.n. 



Diagnosis. — Corallum massive, with the corallites small and 

 elongate; they vaiy in width from. 2-3 mm. and in length from 

 3-7 mm. The corallites are closely united hy a dense wall. 

 Septa very short and thick, with well-marked dark lamina. The 



1 A. E. von Reuss, Foss. Kor. Java : Xovara Raise, Geol. Th., 1867, vol. ii, 

 p. 167, pi. i, fig. 3. 

 .XA. E. vonJieuss:; ibid., p. 16G, pi. i, fig. 2. 



