40 



PEOF. P. MAETIN DrNCAX's EETISION OP THE 



Genus Efhelia, Milne-JEdwards Sf Jules Haime, Hist. Nat, 

 des Corall, vol. ii. p. 124 (1857), amended. 



Colony dendroid; gemmation distichous and at right angles 

 with the margins of the parent calice. Corallites subturbinate. 

 Septa entire where free. Columella rudimentary. Costse sub- 

 equal and project near the calice. Surface granular. Often one 

 bud aborts. 



Distribution, — Fossil. Jurassic : Europe. 



Genus AcEOHELiA, Milne-Edwards ^ Jules Haime, Hist. Nat. 

 des Corall. vol. ii. p. 115 (1857). 

 Colony dendroid. Calices with extremely exsert septa, entire, 

 lanceolate in shape, and they unite by their inner margins at the 

 bottom of the calicular fossa. Columella and pali absent. Costae 

 in the neighbourhood of the calices only. Gemmation regularly 

 spiral in direction. 



Distribution. — Becent. Fiji. 



Genus Asteohelta, Milne-Fdwards Sf Jules Haime, Comptes 

 Bendus de VAcad. des Sci. t. xxix. p. 68 (1849), amended. 



Colony sub dendroid, with more or less coalescing branches 

 or incrusting, Calices unequal, not projecting much, moderately 

 deep. Columella rudimentary, very small, parietal. No pali. 

 Septa dentated, Costse extending down but slightly. Gemma- 

 tion irregular. Coenenchyma granular, thin. Bases of corallites 

 not increasing much in density during growth. 



Distribution. — Fossil. Miocene: Europe, North America. 



There is no doubt that the genus DendroJielia of Etallon 

 ('Lethsea Bruntrutana,' p. 358, 1860) is unsatisfactory. Milne- 

 Edwards and Jules Haime considered the typical species of 

 Etallon to be a doubtful member of the genus Stylina. The 

 balance of evidence is in favour of the species Dendrolielia 

 coalescens, Etall., being one of the Oculinidae. But Etallon is 

 very much in error when he compares the genus with the modern 

 Acrohelia, to which it has only a remote family likeness. 



Etallon considers the genus DendroJielia to include some 

 species of IIelicoenia=Stylina ; but it must be remembered that 

 the species of the genera just noticed are represented by much- 

 worn or considerably altered specimens. 



