TRIBE II. CARYOPHYLLACEA. 427 



Polyps united to their summits, bright greenish-yellow; disks mar- 

 gined with 16 crenatures, and as many tentacles; tentacles hyaline, 

 and in a single series; internal lamella 32 in number. 



Red Sea. Ehrenberg. 



flavo-virulis, Ehrenberg, G. xiii., The Alcyoniitm titberculosum, of Esper 



sp. 1 ; Ehrenberg suggests that this spe- (Pflanz., iii. 68, tab. 23), resembles this 



cies may prove identical with the Jlava, as well as the following species. It was 



which is imperfectly described by Lcsueur. received by him from the Indian Ocean. 



9. PALYTHOA ARGUS. (H. $ Ehrenberg.) 



P. flavo-fusca, scape subglobosa ; polypis contractis 610'" latis ; discis 

 margine 20-crenatis, tentaculis 40, paliide fuscis, in serie duplici, 

 majoribus internis, obtusis, davatis ; lamellis internis 32. 



Brownish-yellow, often subglobose ; polyps, when contracted, 6 to 10 

 lines broad; disks with 20 crenatures to the margin; tentacles 40, 

 pale brown, in two series, the internal larger, obtuse, clavate ; vis- 

 ceral lamella 32 in number. 



Red Sea. Ehrenberg. 



Pali/lhoa urgus, Ehrenberg, G. xiii., sp. 3. 



10. PALYTHOA C^ESIA. (Dana.) 



P. convexa, umbrina; polypis contractis 4-6'" latis ; discis umbrinis, 

 sed medio ccesiis aut paliide violaceis, extus margine crenulatis ; tenta- 

 culis valde numerosis in serie duplici umbrinis. 



Convex ; colour umber ; polyps, when contracted, 4 to 6 lines broad ; 

 disks umber-coloured, except the centre, which is pale grayish- 

 violet; outer margin of the disks crenulate ; tentacles very nume- 

 rous, in two series, umber-coloured. 



Plate 30, fig. 3, and 3 a to 3 h. 



Feejee Islands. Exp. Exp. 



This species has been particularly described on pages 40-42. 

 Corticifcru aggregata (?), Lesson, Coquille, Zooph., pi. 8, fig. 3; island of Bolabo'a. 



