190 PROF. P. MABTIlSr BUNCAN's KEVISIOlSr 01" THE 



Genus Alveopoka, Quoy Sf Oaimard, Voy. de V Astrolabe, Zooph. 

 p. 394 (1834). 



Colony lobed, conyex, foliaceous or dendroid. Corallites united 

 by very largely fenestrated trabecular walls. Calices polygonal, 

 deep, usually unequal. Septa as simple series of distant spini- 

 form trabeculae, wbicb may ramify near tbe axial space, and form 

 a false columella or not. Epitheca basal or pellicular. 



Distribution. — Fossil. Oligocene : Java. Miocene : West In- 

 dies, Europe. — Recent. Eed Sea, Pacific, Indian Ocean. 



In some specimens oi Alveopora viridis, Q,u.oj (A. spongiosa, 

 Dana), tbere are tabulae ; but there are twelve tentacles, which 

 are short and cylindrical. They have been placed in the following 

 subgenus. 



Subgenus Fatositipoea, Saville Kent, Ann. Sf Mag. Nat. Hist. 

 ser. 4, vol. vi. (1870), p. 386, pis. 17, 18. 



The corallum resembles that of Alveopora, and has tabulae. 



Distribution.— Fossil. Palaeozoic : America. — Becent. Locality 

 unknown. 



This type belongs to the Alveopora-viridis group, and can 

 hardly be separated from Alveopora generically. It had better 

 include the tabulate Alveoporce for the future, which are never- 

 theless true Perforata. 



The genus Koninclcia, Ed. & H. Hist. Nat. des Corall. vol. iii. 

 p. 263, is one of the Alveopora-Favositipora group, and is ill- 

 defined. It is from the White Chalk of Eoyan. 



Grenus Somphophoea, Lindstrom, Bichthofen' s China, 

 vol. iv. p. 51 (1883). 



Colony with deep polygonal calices. Wall thick, indistinctly 

 fenestrate with large spaces. Six septa, rather distant, having 

 pointed dentations, not uniting together nor reaching the centre 

 of the calice. Dissepiments (tabulate) irregularly distant one 

 from another. 



Distribution.— Fossil. Silurian: China. 



Lindstrom, with his usual perspicuity, places this genus in the 

 neighbourhood oi Alveopora and Favositipora. 



G-enus DiCHOR^aiA, T. Woods, Froc. Linn. Soc. New South Wales, 

 vol. iii. (1879), p. 96. 

 Colony turbinate, pedunculate, broadly attached. Calices 



