136 THE OCEANIC HYDROZOA. 



Genus Sarcoconus. 



A genus built up by Lesson (' Acalephes,' p. 477), out of the odds and ends of fragments 

 of Slephanomiadm, observed by Chamisso and Eysenhardt, and by Q,uoy and Gaimard. 



Genus Stephanomia. 



S. loevigata, described by Quoy and Gaimard in the 'Zoology of the Voyage of the 'Uranie,' ' 

 p. 585, and figured in pi. Ixxxvi, fig. 2, looks like a fragment of Stephanomia amphitridis. 

 Of the species described as Stephanomice in the ' Zoology of the Voyage of the Astrolabe,' 

 8. hdianthus and S. melo are Athoryhia ; S. /lippojjoda is a Hippopodius; S. triangularis is 

 an Agalma; S. imhricata, S. heptacantha, and S. tectum apparently belong to the same genus ; 

 S. foliacea is very like a true Stephanomia (mihi); S. alveolata is pretty clearly a Forskalia; 

 and iS'. cirrhosa would seem to be part either of a Halisfemma or of a Stephanomia. 



Genus Tetragonum. 



T. Belzoni, Quoy and Gaimard. ' Voy. de rUranie/ Zoologie, p. 579. 

 Probably the detached distal nectocalyx of an Abyla. 



