REPORT ON THE ALCYONARIA. 185 



Family IV. Coralliid^. 



Corallids, Gray, Proc. Zool. Soc. Lond., 1857, p. 286. 

 Corallirice, Milne-Edwards, Hist. Nat. des Coralliaires, t. i. p. 201. 

 Coralliidx, Ridley, Proc. Zool. Soc. Lond., 1882, p. 221. 



Following Eidley we include the two genera Corallium, Lamk., and Pleurocor allium, 

 Gray, in this famUy. We refer to his memoir {loc. cit.) for a detailed account of the 

 various species. 



Genus Corallium, Lamarck. 



Madrepora (pars), Linneus, Syst. Naturse, ed. x. p. 797, 17.57. 

 Isis {pars), Linneus, Syst. Naturte, ed. xii. p. 1288. 

 Corallium, Lamarck, Mem. Mus. Hist. Nat., t. i p. 407, 181. 5. 

 „ Lamouroux, Hist, des Polypes flex., p. 443, 1816. 



Corallium rubrum, Lamarck. 



Madrepora rubra, Linn., Syst. Nat, ed. x. p. 797, 1757. 

 Isis nohilis, Linn., Syst. Nat., ed. xii. p. 12S8. 



Corallium rubrum, Lamarck, Mdm. Mus. Hist. Nat., t. i. p. 407, 1815. 

 „ nobile (Pallas), Ridley, Proc. Zool. Soc. Lond., 1882, p. 221. 



Although no specimens of the precious Coral of commerce were found among the 

 specimens submitted to us ; yet we read in the Narrative of the Cruise,^ that " Eed, or 

 precious Coral occurs at St. lago and also at St. Vincent, the fishery being carried on by 



Italians, &c Professor Thomson and IVIr. Murray dredged over the ground in 



the steam pinnace during the whole of the 8th August and were very successful. The 

 Coral occurs in from 80 to 120 fathoms, and is dragged for by rough nets and swabs; 

 a duty of a dollar j^er kilogramme is paid to the Government." 



Studer also records obtaining specimens of Red Coral from the fishermen at Porto 

 Praya, which he determined to belong to this species. 



Genus Pleurocor allium. Gray, emend. Ridley. 



Pleurocorallium, Gray, Proc. Zool. Soc. Lond., 18G7, p. 126; Cat. Lithojjhytes, &c., p. 23. 

 Pleurocorallium, Gray (emend.), Ridley, Proc. Zool. Soc. Lond., 1882, p. 231. 



Colony with stem and branches, these latter with lateral piuu;i3. The axis oval on 

 transverse section, white or partly red and white. The coenenchyma with spicules of two 

 kinds — double clubs and many-rayed double stars. Polyps with shallow verrucse, those 

 of the stem and main branches confined to the anterior surfaces. 



' Narr. Chall. Exp., vol. i. p. 191. 

 (zool. chall. EXP. — PART LXIV. — 1888.) Sss 24 



