156 



DEPARTMENT OF THE NAVAL SERVICE 



Campanularia verticillata (Linn'ceus) . 



Trophosome. Main stem fascicled throughout, 

 ending like a stump; main branches also fascicled; 

 hydranths arranged in irregular whorls, with long 

 pedicels, annulated or wavy throughout, hydrotheca 

 rather large, not much deeper than wide; margin with 

 12-14 blunt teeth. 



Goiiosome. Gonangia sessile on the main stem, 

 fusiform with bottle neck; surface smooth; ova large. 



No. 36. 

 Camj)anularia verticillata. 



Campanularia voluhilis (Linna?us). 



Trophosome. Stem unbranched; stolon smooth or twisted; 

 pedicel slender, spirally twisted or annulated; hydrotheca small, 

 narrow and deep, tubular; margin with about 10 rounded, often 

 very low teeth. 



Gonosome. Gonangium flask-shaped, with long narrow 

 neck, borne on the stolon; pedicel short, annulated. 



Genus Clytia. 



No. 37. 

 Campanularia voluhilis. 



Trophosome. Stem unbranched or irregularly branched. . 



Gonosome. Gonophores producing free medusse which are somewhat spherical, 

 with four tentacles at the time of liberation. 



KEY TO SPECIES. 



Stem usually much branched. 

 & Gonangium corrugated. 



Stem usually unbranched. 



c Hydrotheca cylindrical, margin with sharp teeth. 

 cc Hydrotheca campanulate, teeth blunt or rounded. 

 d Gonangium smooth. 

 dd Gonangium corrugated. 



C. edivardsi. 



C. cylindrica. 



C. noliformis. 

 C. johnstoni. 



Clytia cylindrica Agassiz. 



Trophosome. Stem unbranched; the slender pedi- 

 cel annulated proximally and distally; hydrotheca 

 cylindrical, twice as deep as wide, suddenly constricted 

 at the base where the diaphragm appears inside; teeth 

 10-12, sharp pointed and deeply cut. 



Gonosome:^. Gonangium from the stolon or pedicel, 

 oblong, or obovate, smooth; pedicel short, with one or 

 two annulations. ( 



No. 38. 

 Clytia cylindrica. 



