BY R. VON LENDENFELD, PH.D. 267 



long and narrow, 1-J times as long as the manubrium, about 3 

 times as long as the radius of the Umbrella ; its membranous 

 border is twice as broad as the thin cylindrical middle-rip, at its base. 



Colour : Variable, generally pale rose or violet. Mouth-arms 

 more violet. Gonads more purple. Nettle-warts violet. 



Size : Breadth of Umbrella, 50 mm. Height of Umbrella, 

 33 mm. Ontogenesis unknown. 



Locality : Tropic zone of the Pacific Ocean, from Australia to 

 Peru. Peron, Eschscholtz, Lesson, von Mertens, Couthouy, etc. 



Species : Pelagia papillata. 



Haeckel, System der Medusen. Seite, 509. 



Umbrella slightly vaulted. Orbicular 3 times as broad as high. 

 Exumbrella thickly set, with high conic nettle-warts. Marginal 

 flaps twice as broad as high, deeply crenated, nearly double 

 flapped. Manubidum very long and narrow ; 8 times as long as 

 broad, twice as long as the radius of the Umbrella. Mouth-arms 

 short and narrow, a little shorter than the manubrium, scarcely as 

 long as the breadth of the Umbrella. Its membrane boi'der narrow, 

 nearly smooth, at the base narrower than the thin middle ribs. 



Size : Breadth of Umbrella, 40 mm. Height of Umbrella, 

 1 4 mm. Ontogenesis unknown. 



Locality : Indian Ocean. Schnehagen. 



Species. Pelagia discoidea. 



Haeckel, System der Medusen. Seite, 510. 



Pelagia discoida. Eschscholtz, 1829. System der Acalephen, 

 p. 76, Taf. VII., fig. 1. 



Placois discoidea. L. Agassiz, 1862. Monogr. Acal. Contrib. 

 IV., p. 125, 165. 



Umbrella quite flat, orbicular, 4 times as broad as high. 

 Exumbrella smooth, without pi-qjecting nettle-warts. Marginal- 

 flaps very flat, deeply crenated. Manubrium very short. Mouth- 

 arms very long and narrow, 3 times as long as the radius of the 

 Umbrella. Its membrane border broad, very much folded and 

 curved, at its base several times bix>ader than the very thin 

 cylindrical middle rib. 



