552 



MEDUSiE OF THE WORLD. 



crescent-shaped gonads, each with onh' one gastric filament. His Palephyra primigcnia 

 appears to be the half-grown medusa. There are only 2 gastric cirri in each interradius, and 

 the gonads and tentacles are said to be light-reddish, nearly colorless. It comes from the Red 

 Sea, near Tur. 



Palephyra pelagica. 



Zonephyra zonaria ()'oung medusa), Haeckel, 1880, Syst. 



der Medusen, p. 484, taf. 27, fign. 7, 8. 

 Zonephyra pelagica, Haeckel, Ibid., p. 485. 



Bell 12 mm. wide, 2 mm. high, with 

 a coronal furrow. Mouth-tube wide and 

 short, hardly one-third as long as bell- 

 diameter (contracted ?). 16 spatula- 

 shaped, pointed lappets, half as long as 

 bell-radius. 8 adradial tentacles not quite 

 half as long as bell-radius. 4 half-moon- 

 shaped interradial gonads with ends of 

 crescent pointing outward. Each gonad 

 consists of 3 swellings; the middle part 

 being hardlyhalf as largeas the two lateral 

 ones. 10 to 12 short, gastric cirri in each 

 interradius. Color (?) Coast of Japan. 

 Haeckel describes that which may be 

 a young stage of this medusa under the 

 name of Zonephyra zonaria. It is only 8 

 mm. wide. The mouth tube and tentacles 

 are longer than in P. pelagica, but this 

 may be due to conditions of contraction. 

 The median and terminal swellings of 

 each gonad are all of the same size. Found off the coast of China. Haeckel's Zonephyra 

 connectens (System der Medusen, p. 641), from the tropical Pacific is said to differ from those 

 described above in having each gonad composed of 2 swollen regions instead of 3 as in his 



Fig. 349. — **Zonephyra zonaria" after Haeckel, 

 in Das Syst. der Medusen. 



Fic. 350. — Palephyra " primigenia," after Haeckel in Das Syst. der Medusen. 

 Fir.. 351. — Palephyra indica, after Vanhoffcn, in Valdivia Expedition. 



