REPOPtT ON THE ATX'YONARIA. Iv 



13. Menacella, Gray, Aun. and Mag. Nat. Hist., ser. 4, vol. v. p. 406 ; emend. 

 Eidley, Ann. and Mag, Nat. Hist., ser. 5, vol. x. p. 191, 1882. 



The colony is in habit like the preceding. The spicules are simple warty spindles 

 with many tuberculated warts. 



14. Heterogorgia, Verrill, Amer. Journ. Sci. and Arts, vol. xlv. p. 413, 1868. 



The colony is branched. The ccenenchyma is thin, with a smooth or finely granular 

 surface. The small spicules occur as rough, warty, short spindles, clubs, double-clubs, 

 double-stars, crosses or irregular forms. The polyp calyces are rounded warts witii a 

 marginal fringe of long sharp spindles projecting around the oral region. 



15. Astrogorgia, Verrill, Amer. Journ. Sci. and Arts, vol. xlv. p. 413, 1868. 



The colony is branched, with irregularly distributed projecting polyp calyces, on 

 which the spicules occur in eight longitudinal rows. There is a well-marked tentacular 

 operculum. The spicules are small spindles with double and simple clubs. 



16. Behryce, Philippi, Archiv f. Naturgesch., Bd. i. p. 35, 1842; Kolliker, Icones histio- 



logicae, pt. ii. p. 137 ; v. Koch, Fauna und Flora d. Golfes v. Neapel., xv. 

 1887, p. 54. 



The colony is branched, with a very thin ccenenchyma, and relatively high, sub- 

 cylindrical calyces, which are alternately arranged on the axis. The spicules of the 

 ccenenchyma form externally a layer of scales which exhibit more or less dentate or 

 irregular margins, one or more, longer or shorter, warty processes being given ofi" from 

 each centre. Beneath these, there is a layer of warty ii-regular spindles including tri- 

 and hexradiate forms. Spicules of the same shapes are found in the pol}q) calj'ces. 



17. Acamijtogorgia, n. gen. 



Perisceles, Wright and Studer, Archiv f. Naturgesch., Jahrg. liii. Bd. i. p. 57 (name already in 

 use for a Coleopteron). 



The colony is branched, with tubular, cylindrical, .short polyp calyces, which are 

 usually given off alternately from each side of the axis. The spicules arc foliaccous 

 clubs, the folia project beyond the ccenenchyma, but the triradiate bases are embedded 

 in the ccenenchyma. In most cases bidentate folia, at right angles to one another, 

 originate from a tripartite base. Besides these there are also warty curved spindles and 

 clubs. The tentacular opercula are well developed. 



