34 



PEOF. P. MAETIN DUNOAN'S EEVISION OF THE 



Grenus CcEifOCTATHrs, MM. Milne-JEdwards ^ Jules Haime, 

 Ann. des Sci. Nat. 3' ser. t. ix. p. 299 (1848). 



Colony busli-sliaped, more or less ramified ; corallites long, 

 conico-cylindrical ; calices circular, deep. Columella small, and 

 consists of a few twisted processes. Pali in one crown. Wall 

 thick and smooth, or granular or costulate. 



Distribution. — Fossil. Oligocene, Miocene, Pliocene : Europe. — 

 Mecent. Mediterranean. 



Grenus GEMMrLATEOCHiJS, Duncan, Madrep. of Deep Sea^ Trans. 

 Zool. Sac. vol. X. pt. 5, p. 243 (1878), amended. 



Colony small and bush-shaped. Parent conico-cylindrical, with 

 a broad adherent base. Calice deep ; columella rudimentary. 

 Septa stout, not reaching far inwards. Costas hidden by a well- 

 develoj^ed epitheca. Buds ascend in growth, and join others by 

 their epitheca. 



Distrihution. — 'Recent. I^orthern shores of the Mediterranean, 

 littoral. 



3. Subfam. Turl}inolidv(B rcgtantes. 



The corallites of the colony grow from an expansion of the 

 basal structures of the parent or assemblage. There is no endo- 

 theca, and the septa are plain. 



The forms thus differentiated represent the Astrangiacese o£ 

 MM. Milne-Edwards and Jules Haime of their group AstrseacesD. 



Genus Polycyathus, Duncan, Droc. Zool. Soc, 1876, p. 433, 

 amended. 



Colony of close or rather distant corallites, cylindro-conical in 

 shape. Calicular margin wavy or angular. Septa irregular, 

 exsert. Pali before the secondaries and tertiaries larger than the 

 ends of the small septa, bilobed or not. Columella deeply seated, 

 small, papillary or spinulose. Costee subequal, granular. Epi- 

 theca well developed. 



Distrihution. — Recent. South Atlantic, St. Helena. 



Subgenus Agelecyathus, (genus) Duncan., Froc. Zool. Soc. 

 1876, p. 434. 



There is no epitheca. The costse are well developed. The 

 colony incrusts, or the stoloniferous expansions are large. 

 Distribution. — Recent. St. Helena and Persian Gulf. 

 This subgenus is taken from the genus Agelecyatlms^ nobis. 



