64 



MEDUSAE OF THE WORLD. 



10, 1901. It is distinguished from all other American species of Sarsia by its medusiform 

 gonads borne upon the manubrium (text-fig. 26). It is not known whether medusae are set 

 free from the manubrium of the parent medusa. 



Sarsia flammea Hartlaub. 



Sarsia eximia (in part), HAECKEL, 1879, Syst. der Medusen, p. 17. 



Sarsia fammea, LINKO, 1905, Zool. Anzeiger, Bd. 28, p. 212. HARTLAUB, 1907, Nordisches Plankton, Nr. 12, p. 12, figs. 4-6. 

 (literature); 1903, Zool. Centralblatt, p. 22. 



Bell high oval, 12 mm. high, 7 mm. wide, walls quite uniform and of moderate thickness. 

 4 tentacles, with well-developed, simple basal bulbs without ocelli. Tentacle tips slightly 

 enlarged, club-like. Nematocysts over distal halves of tentacles arranged in prominent, broken 

 rings. 4 slender, straight radial-canals. Manubrium thick, conical, spindle-shaped; only 

 two-thirds as long as the depth of the bell-cavity. No axial-canal above the stomach. Gonad 

 ring-like, encircling the manubrium from base to near the mouth. Stomach and tentacle- 

 bulbs light fiery-red or orange. 



From the Arctic Ocean. 



FIG. 26. Sarsia hargitii, after Hargitt, in Bull. TJ. S. Bureau of Fisheries. 



FIG. 27. Sarsia flammea, after Hartlaub, in Nordisches Plankton. Showing arrangement of nemato- 

 cyst clusters on tentacles. 



Separated from Sarsia eximia and S. brachygaster by its lack of ocelli, and from S. 

 brachygaster also by its smaller size. The best description is that of Hartlaub, 1907. Hydroid 

 unknown. It is possible that this may be the medusa of the parasitic hydroid called 

 Hydnchthys mirus Fewkes. 



Genus SARSIA, Subgenus STAURIDIOSARSIA nov. subgen. 

 Stauridium, HARTLAUB, 1895, Zeit. fiir wissen. Zool., Bd. 61, p. 142; 1907, Nordisches Plankton, Nr. 12, p. 52. 



CHARACTERS OF THE SUBGENUS. 



Medusa similar to Sarsia, but the hydroid is Stauridia, not Syncoryne. 



The name Stauridia should not be applied to these medusae, for it was first used by 

 Dujardin, 1843, to describe a hydroid which gives rise to a Cladonema medusa. It may be 

 well to apply the new generic name Stauridiosarsia to hydroids which resemble Stauridia, 

 but produce Sarsia-\\ke medusae. 



