SUBORDER ALCYONARIA. 605 



narrow. The papillae in the upper view of a tentacle, are separated 

 by an extremely narrow line, so that those of the two sides almost 

 meet at base ; they are long and slender, the length being full eight 

 times the diameter. 



Xenia itmMlata, Savigny, Egyp., polypes, figured from a preserved specimen from 

 pi. 1, fig. 3. the Red Sea, may be this species or the 



, Lamk., ii. 626, No. 1. following. 



, Ehronb., G. xx., sp. 1. Xenia cferulea, Lamour., Exp. Meth., 69. 



The Xenia umlxllata of Schweigger (Beo- , Blainville, Man., 523. 



bacht. taf., 5., fig. 48, andHandb., 411), 



2. XENIA FUSCESCENS. (H. 4- Ehrenberg.) 

 X. polypisfuscescentibus, tentaculorum papillis utrinque 4-seriatis. 



Polyps brownish, papillre in 4 series on each side of the tentacles. 

 Red Sea. Ehrenberg. 



Xenia fusccscens, Ehrenb., G. xx., sp. 2 ; Xenia fuscescens, Lamk., 2d. ed., ii. 626. 

 " An prioris varietas, quam habitu exacte 

 refert." 



3. XENIA C^ERULEA. (H. 4- Ehrenberg.) 



X. minor, gracilior, Icete cceruka, tentaculorum papillis paucioribus ; 

 stipite breviore, basi pollicari. 



Small and more delicate than the preceding, blue ; papilla? of the 

 tentacles fewer ; trunk shorter, an inch thick at base. 



Red Sea. Ehrenberg. 



Xcttia ccerulea, Ehrenb., G. xx., sp. 3. Xenia carulea, Lamk., 2d ed., ii. 627. 



NOTE. Figures 3, 3 a, and 3 b, plate 57, represent a species from the Feejees, which 

 may be Ehrenberg's cceruka. It is a young group, though the polyps, as in other cases, 

 are adults. The star is hardly half an inch broad ; the tentacles slender ; the papillte 

 in two or three series, and short, their length being about twice their breadth, and not 

 exceeding the width of the intervening midrib of the tentacle as seen in an upper view. 

 The colour is a pale rose. It has shorter and stouter papilla; than the elongata. 



152 



