590 



MEDUSA OF THE WORLD. 



rhopalar pouches are 1. 5 times as wide as the 8 tentacular pouches, but at the bell-margin 

 only half as wide. 



This medusa is clearly derived from Dactylometra longicirra of Japan. D. lactea of 

 America tends to attain to the Kuragea condition, but all of the octants do not usually develop 



equally (see text-fig. 369). 



Genus SANDERIA Gbtte, 1886. 



Sanderia, GOETTE, 1886, Sitzungsber. Akad. Wisscn. Berlin, Jahrg. 1886, p. 835. VANHOFFEN, 1902, Wissen. Ergeb. deutsch. 



Tiefsee Expedition, Dampfer, Valdtvta, Bd. 3, Lfg. i, p. 37. 

 Xeopelagia (an aberration), KISHINOUYE, 1910, Journal College Sci. Tokyo, vol. 27, art. 9, p. 14. 



The type species is Sanderia malayensis Goette, of the tropical Indian Ocean and Malay 

 Archipelago. 



GENERIC CHARACTERS. 



Pelagidae with 16 marginal sense-organs, 16 tentacles, and 32 cleft marginal lappets. 

 4 lips, 4 interradial gonads, and 32 peripheral stomach-pouches in the radii of the tentacles 

 and sense-organs. No marginal ring-canal. 



Sanderia malayensis Goette. 



Sanderia malayensis, GOETTE, 1886, Sitzungsber. Akad. Wissen. Berlin, Jahrg. 1886, p. 835. VANHOFFEN, 1902, Wissen. Ergeb. 



deutsch. Tiefsee Expedition, Dampfer Valdivia, Bd. 3, Lfg. I, p. 38, taf. 3, fig. 12; taf. 8, fign. 69-74. 

 Ncopclagia eximia, KISHINOUYE, 1910, Journal College of Sci. Tokyo, vol. 27, art. 9, p. 14, plate 3, fig. 15, text-fig. I. 



Bell flat, 90 mm. wide, large, rounded nettling-warts at the center of the exumbrella but 

 diminishing in size outwardly so as to be absent at the bell-margin. 16 marginal sense-organs 



FIG. 375. Sanderia malayensis, after Vanhbffen, in Valdivin Expedition. 



alternating with 16 long, ribbon-like tentacles, 32 cleft lappets. A long, tubular oesophagus is 

 bounded on the 4 perradial corners by long, complexly folded lips. The 4 interradial, heart- 

 shaped, genital ostia are each bordered externally by about 24 to 30 finger-shaped papillae. The 

 central stomach gives rise to 32 peripheral pouches in the radii of the sense-organs and tentacles. 

 These are completely separated one from another by straight, radiating septa which converge 

 slightly near the bell-margin in the rhopolar radii. There is no marginal ring-canal. The gen- 

 eral color is yellow with the aboral center of the bell dusted over with reddish flecks which 

 extend outward, spoke-like, in the radii of the sense-organs and tentacles. The mouth-parts 

 are also covered with reddish spots. 



