32 ELLISELLAD^E. 



well-marked lateral impression, with a powdery surface. Polype- 

 cells convex, compressed, rather far apart on the sides of the com- 

 pressed branches, with a central circular impression. Axis calca- 

 reous, articulated ; joints elongate, translucent, cylindrical, strongly 

 angularly longitudinally grooved ; internodes very short, contracted ; 

 branches from the internodes. 



" The coral articulated ; the long joints or nodes are solid, com- 

 posed of spicules tightly packed together, and are fluted. The inter- 

 nodes are small, and composed of a mass of loosely compacted 

 spicules ; the structure of the spicules of the central substance is 

 straight ; some of them are almost fac-similes of those figured in 

 Kolliker's Icon. t. xix. f. 38-39." P. Wright, Feb. 9, 1869. 



125. Wrightella chrysanthos. B.M. 



Coral furcately branched ; branches divergent, compressed. Bark 

 white. Tentacles yellow. Axis white. 



Hob. Seychelles (Dr. Perceval Wright}. 



126. Wrightella coccinea. B.M. 



Coral branched ; branches divergent, compressed. Bark and axis 

 bright scarlet ; surface of bark retractile. 

 Hob. Seychelles (Dr. P. Wright} ; Ceram. 



54. HELIANIA. 



Coral arboreous, dichotomously branched ; branchlets subsecund, 

 ascending, divaricate ; lower branches sometimes inosculating. Bark 

 granular, hard, even. Cells produced, subcylindrical, short, rather 

 incurved, placed in two, three, or four alternating series on the sides 

 of the branchlets, and scattered rather irregularly on the branches. 

 Axis hard, continuous, grey brown, calcareous. 

 Heliania, Gray, P. Z. S. 1859, p. 480. 



127. Heliania spinescens. B.M. 



Coral rather fan-like, more or less twisted ; branches, especially 

 the lower, conical, acute, spine-like, sometimes inosculating ; upper 

 branches subsecund. 



Heliania spinescens, Gray, P. Z. S. 1859,' p. 481. 



Hob. Philippines (Cuming). 



55. PHENILIA. 



Coral tree-like ; branches short, subquadrangular, divaricating, 

 sometimes coalescing, forming an irregular netted frond ; branchlets 

 subclavate, some free. Bark granular ; lateral groove distinct, 

 scarcely sunken. Cells large, sunken, in two or three irregular rows on 

 each side of the branches. Axis solid, hard, calcareous, horn -coloured. 

 Phenilia, Gray, P. Z. S. 1859, p. 482. 



