HYDROIDS OF EASTERN CANADA 



157 



Clytia edwardsi (Nutting). 



Trophosome. Stem usually with few or many 

 irregularly arranged branches, 3 cm. high; pedicels 

 long and slender, annulated proximally and distally; 

 hydrotheca deeply campanulate with 10-14 deeply-cut, 

 slender teeth, rounded at the tip. 



Gonosome. Gonangium oblong or oval, corru- 

 gated; pedicel short, annulated. 



No. 39. 

 Clytia edwardsi. 



Clytia johnstoni (Alder). 



Trophosome. . Stem unbranched or with a single 

 branch, annulated proximally and distally; hydrotheca 

 broadly campanulate, depth and width nearly equal; 

 margin with 12-16 teeth, slightly rounded or sharper. 



Gonosome. Gonangium on the stem or stolon, oval 

 or oblong, truncate, corrugated; pedicel short, annu- 

 lated. 



No. 40. 

 Clytia johtistoni. 



Clytia noliformis (McCrady). 



Trophosome. Stem unbranched, short, stout, exten- 

 sively annulated, sometimes throughout he whole length; 

 hydrotheca broadly campanulate, as wide as or wider than 

 deep; teeth 10-12, rounded at the tip. 



Gonosome. Gonangium on the stolon, almost sessile, 

 broadly oval, distal end with a short neck below the rim. 



No. 41. 

 Clytia noliforviis. 



Genus Eucopella. 



Trophosome. Stem unbranched; hydrotheca with very thick wall and entire 

 margin. 



Gonosome. Gonophores producing large medusoid structures of elongated dome- 

 shape, without mouth or digestive cavity. 



Eucopella caliculata (Hincks). 



Trophosome. Stem unbranched, varying in length, 

 slightly wavy or annulated, with a distinct double 

 annulation below the hydrotheca; hydrotheca with very 

 thick wall and entire margin. 



Gonosome. Gonangium large, irregularly obovate, 

 the distal end somewhat rounded or truncate, almost 

 sessile on the stolon; two medusoids in the gonangium 

 at the one time, a large one occupying the greater por- 

 tion of the space and a much smaller one below; these 

 are elongated oval in shape. 



^r*^?^ 



No. 42. 

 Eucopella caliculata. 



