SUBORDER ALCYONARIA. 



AULOPORA TENUIS. (Dana.} 



A. rubra ; corallo filiformi, reticulato, pkrumque '" lato, cellis orbicu- 

 latis, non prominulis. 



Red; tubular corallum filiform, reticulate, mostly J of a line broad; 

 cells circular, not prominent. 



Plate 59, figure 5, corallum, natural size. 



The Paumotu Archipelago. Exp. Exp. 



This species looks like an open network of red thread. The cells 

 are situated at the intersections, and there the corallum is slightly en- 

 larged and inflated; (see farther p. 66.) It occurs upon the dead 

 portions of a large Millepora obtained at Raraka Island, by J. P. 

 Couthouy. 



GENUS II. TELESTO. LAMOUROUX. 



Tubiporidce acrogence, segregato-ramosce ; polypis retractilibus ; tubulis 

 semicalcareis. 



Acrogenous, segregato-ramose ; polyps retractile; tubes sernicalca- 

 reous. 



The species of Telesto branch more or less arborescently, and, as 

 each branch is a simple tube, they are all slender. The polyp-flowers 

 tip the branches, and on contraction the tentacles are withdrawn 

 within the extremity. 



This genus was instituted by Lamouroux, and placed near the 

 Tubularise. Blainville suggested its affinity to the Tubipora, after 

 examining Lamouroux's species, and finding eight strise about the 

 summits, indicating an Alcyonoid character. Lamarck, in the first 

 edition of his treatise, united the species with the genus Synoicum of 

 Phipps, which was afterwards found to belong with the Ascidize. 



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