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ZOOPHYTES. 



SUBFAMILY I. XENIN^E. 

 Carnosce; polypis non retractilibus. 

 Carnose, and surface not harsh ; polyps not retractile. 



GENUS I. RHIZOXENIA. EHRENBERG. 



Alcyonida carnosce, polypis non retractilibus, per stolones filiformes gem- 

 mantibus. 



Carnose Alcyonidae ; polyps not retractile and budding by means of 

 creeping filiform shoots. 



This genus was instituted by Ehrenberg for the Zoantha thalas- 

 santhos, of Lesson, an imperfectly described species, and probably 

 a Cornularia, or near Quoy and Gaymard's Clavularice. Philippi 

 has instituted the genus Evagora, with the same characteristics, pro- 

 posing (we think unnecessarily) to substitute this name for Eliren- 

 berg's, on the ground of the uncertainty with regard to the characters 

 of Lesson's species. The name Rhizoxenia, is from |i a , a root, and 

 Xenia, the name of a following genus, allied to this in its polyps. 



1. RHIZOXENIA THALASSANTHA. (Lesson.) Ehrenberg. 



R. corpore claviformi, lonyitudinaliter striato, tentaculis Jiliformibus 

 pinnatis. 



Body claviform, longitudinally striate, tentacles filiform, pinnate. 



This species is referred to the genus Cornularia, by Blainville and 

 Milne Edwards, with the species of which it agrees nearly in habit. 

 It also resembles Quoy and Gaymard's Clavularia viridis. 



