REPORT ON THE ALCYONARIA. xiii 



9. Coelogorgia, Milne-EcUvards. 



10. Cyathopodium, Verrill. 



11. Scleranthelia, Studer. 



12. Anthopodiuin, Verrill. 



13. Sympodium, Ehrenberg. 



14. Erythropodium, Kolliker. 



15. Callipodium, Verrill. 



16. Pseudogorgia, Kolliker. 



1. Cornulana, Lamarck, Hist. Nat. Anim. sans Vertebres, t. ii. p. 3, 1816, ed. 2, 

 p. 127; Milne-Edwards, Hist. Nat. des Coralliaires, t. i. p. 105. 



The colony consists of a number of free polyps, united, however, to one another 

 by root-like stolons, which latter creep over various foreign bodies. Spicules are not 

 met with, but a horny substance gives some rigidity to the polyp tubes. 



2. Rhizoxenia, Ehrenberg, Corallenth. d. rothen Meeres, p. 55, 1834; Milne- 

 Edwards, Hist. Nat. des Coralliaires, t. i. p. 107; Dana, U.S. Explor. Exped. 

 Zooph., p. 606. 



Evagora, Phillipi, Archiv f. Naturgesch., Jahrg. viii. p. 36,, 1842. 



In this genus the colony resembles that of Cornularia, but the polyps are well 

 furnished with spicules ; the polyps are not retractile. 



3. Clavularia, Quoy and Gaimard, cf. Blainville, Diet. d. Sci. Nat., t. x. p. 499, 

 1830; and Voyage de I'Astrolabe, t. iv. p. 260 ; Studer, Monatsber. d. .k. 

 preuss. Akad. d. Wiss. Berlin, 1878, p. 632. 



The species of this genus resemble much those of Cornulana, but are easily dis- 

 tinguished from them by the presence of spicules, while the polyps being retractile can 

 thus be separated from those of Rhizoxenia. 



4. Sarcodictyon , Forbes, in Johnston's Hist, of Brit. Zooph., ed. 2, 1847, vol. i. p. 

 179; Herdman, Proc. Roy. Phys. Soc. Edin., vol. viii. p. 31. 



The colony presents the appearance of a narrow band, the stolon, which is adherent 

 and bears at intervals the retractile polyps. The stolon is flattened, tape-like, sometimes 

 anastomosing ; the polyps are mostly but not always in single series. The spicules are 

 spiny spindles and irregular stellate and disc-like forms. 



(ZOOL. CHALL. KXP, — PART LXIV. — 1889.) _ SsS C 



