190 



PROF. P. MARTIN DUNCANS \s REVISION OF THE 



Genus Alyeopora, Quoy <Sf Gaimard, Voy. de V Astrolabe, Zooph. 

 p. 394^ (1834). 



Colony lobed, convex, 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, which may ramify near the axial space, and form 

 a false columella or not. Epitheca basal or pellicular. 



Distrihuiion. — Fossil. Oligocene : Java. Miocene : "West In- 

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



In some specimens of Alveo^ora viridis, Quoy (vl. spongiosa, 

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

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

 subgenus. 



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

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



The corallum resembles that of Alveopom, and has tabulae. 



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

 unknown. 



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

 hardly be separated from Alveopora generically. It had better 

 include the tabulate Alveoporw for tlie future, which are never- 

 theless true Perforata. 



The genus KonincTcia, 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. 



Genus Somphophora, 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. 



Genus Di chorda, T. Woods, Proc. Linn. Soc. New South Wales, 

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

 Colony turbinate, pedunculate, broadly attached. Calices 



