SEMAEOSTOME.E — DRYMONEMA. 



6o;? 



Genus DRYMONEMA Haeckel, i88o. 



Drymonema, Hakckfl, 1880, Sitzungsber. Jena. GcscU. fur Med. unj Naturw., Jahrg. 1880, Feb. 20; 1880, Syst. dcr Medusen, 

 p. 633; 1881, Report on Deep-sea Medusae, Challenger Expedition, Zool., vol. 4, p. 124.— Muller, F., 1883, Zool 

 Anzciger, Jahrg. 6, p. 220. 



The type species is Dryitioncma Jnlmatma Haeckel, 1880, ot the Mediterranean. The 

 same species was renamed D. "victoria" by Haeckel in 1881. D. gorgo is a closely related 

 form from the coast of Brazil. 



GENERIC CHARACTERS. 



Cyaneidae with 8 marginal sense-organs. The tentacles are not grouped in separated 

 clusters, but arise dift'usel\ in a wide annulus from the subumbrella. The central stomach 

 gives rise to 16 radial pouches (8 ocular and 8 interocular) which branch dichotomously, but 

 do not anastomose. No ring-canal. Marginal lappets numerous. Development unknown. 



Fig. 384. — Drymonema '*victoriu,^^ after Haeckel, in Deep-sea Medusa* of the Challenger Expedition. 



This genus is distinguished from Cvmu-ii and Desmotinnn by the fact that its tentacles arise 

 not in 8 separate clusters, but from a wide annular zone in the subumbrella. Moreover, the 16 

 dichotomousl\- branched radial-canals, numerous velar lappets, and the radial furrows of the 

 exumbrella are all distinctive of Drymonema. 



Drymonema dalmatina Haeckel. 



Drymonema ilaIniatina,}iAZCKtL, 1880, Syst.der Medusen, p. 6.^2= D .victoria, 1 88 1, Report Deep-sea Medusje Challenger Exped., 



Zool., vol. 4, p. 125, plates 30, 31. — Graeffe, 1884, .-Xrbeit. Zool. Inst. Wien, Bd. 5, p. 342. 

 Drymonema cordelio, Antipa, 1892, Jena. Zeitsch. fur Naturwissen, Bd. 27, p. 339, taf. 9, fign. 1-3. 



Haeckel, 1880, had four small specimens of this medusa from the Dalmatian coast, 

 Mediterranean. They ranged from 120 to 160 mm. in width and had only 64 radial furrows 



