32 



PEOF. P. MAETIN DTJ^CAN'S REVISION OF THE 



indefinite group of Palaeozoic corals called the Eugosa, and espe- 

 cially with the Cyathaxonidse. Writing in 1850, MM. Milne- 

 Edwards and Jules Haime (see also Hist. Nat. des Corall. vol. iii. 

 p. 329) state that the little group of Cyathaxonidse recalls the 

 family Turbinolidse of the Aporose Madreporaria. The Cyathax- 

 onidse have, however, a septal fossula and a styliform columella. 

 The genus Polycoelia, King, = Calophyllum, is also simulated. It 

 is a Permian group. Nevertheless there are many points about 

 the genera Guynia, Duncania, and HaplopJiyllia which ally them 

 to the Aporose Madreporaria, amongst which they are here in- 

 cluded as an Alliance. 



Grenus Gutnia, Duncan, Madreporaria of Deep Sea, Trans. Zool. 

 Soc. vol. viii. pt. 5, p. 335 (1873), amended. 



The corallum is simple, attached, long and narrow. The wall 

 is thick and solid, and has a delicate epitheca and flat cOstse. The 

 septa are well developed, unequal, and extend from base to calice. 

 There are four systems of septa ; one septum may be longer and 

 larger than the others. The columella is essential, and may be 

 attached to the larger septa. Grrowth-rings occur. Occasionally 

 the hexameral arrangement of septa occurs, or it may happen in 

 the same corallum with the quadrate. 



Distributio7i. — Recent. Mediterranean and West-Indian seas. 



Grenus Duncania, FourtaUs, Zool. Results of Hasslar Eccped. 

 1874, p. M*. 



Corallum attached, cylindrical, covered with a thick wrinkled 

 epitheca, rising over the border of the calicle. Interseptal cham- 

 bers filling up solidly from the bottom ; septa showing no defi- 

 nite systems ; pali sometimes present ; a multiple-pillared 

 columella. 



Distribution. — Recent. West-Indian seas. 



The septa are 18, 20, 21 in number, and the tentacles are about 

 25 to 30 in number. The length of the species is 20-25 millim., 

 diameter 10-11 millim. 



Genus Haplophyllia, Rourtales, Bull. Mus. Comp. Zool. No. 7, 

 and Illustr. Cat. Harvard Coll. No. 4 ; Deep-Sea Corals, p. 51. 

 Corallum simple, fixed by a broad base covered with a thick 

 epithelium. Columella styliform, strong, very thick at the base. 



* Lindstrom, o^. cit. p. 13. 



