SOYPHOMEDUSAE COLLECTED BY STEAMER ' ' ALBATROSS." 199 

 ATOLLA BAIRDII forma VALDIVIAE Vanhoffen. 



Atolla valdiviae Vanhoffen, 1902, Wissen. Ergeb. deutsch. Tiefsee Expedi- 

 tion, Dampfer Valdivia, vol. 3, Lief. 1, p. 13, pi. 1, fig. 3 ; pi. 6, figs. 41-46.— 

 Maas, 1903, Schphomedusen der Siooga Expedition, Monog. 11, p. 17, pi. 1, 

 figs. 3, 4 ; pi. 3, fig. 23 ; pi. 12, fig. 108.— Mayeb, 1910, Medusae of the World, 

 vol. 3, p. 565, fig. 358. 



This form is very closely related to A. bairdii, but the central disk 

 is only half as wide as the medusa, and the four septal nodes are 

 wider than in A. bairdii. 



The Albatross obtained three specimens (Cat. No. 27927, U.S.N.M.) 

 of this medusa in the Philippine Island on April 10, 1908, at dredging 

 station No. 5202, in Gogod Bay, depth 502 fathoms, bottom green 

 mud. The characters and dimensions of these specimens are given 

 by Mayer. 1 



Genus PELAGIA Peron and Lesueur, 1809. 



Pelagia Pebon and Lesueub, 1809, Annal. du Mus. Hist. Nat. Paris, vol. 14, 

 p. 349.— Mayeb, 1910, Medusae of the World, vol. 3, p. 570. 



Generic Characters. — Semaeostomata of the family Pelagidae, in 

 which the central stomach gives rise to 16 completely separated radi- 

 ating pouches, 8 in the radii of the tentacles and 8 in the radii of the 

 sense-organs. There are 8 adradial tentacles, 8 rhopalia, and 16 

 partially cleft marginal lappets. Each of the 16 stomach pouches 

 is cleft at its distal end, where it enters the marginal lappets. There 

 is no ring-canal. 



PELAGIA PANOPYRA Peron and Lesueur. 



Medusa panopyra Peron and Lesueub 1807, Voyage aux terres Australes, 



pi. 31, fig. 2. 

 Pelagia panopyra Mayer, 1910, Medusae of the World, vol. 3, p. 575. 



This widely distributed tropical Pacific species is distinguished by 

 its small, low, rounded exumbrella warts, which are elliptical in out- 

 line and have a longitudinal furrow with cross-foldings. The bell 

 becomes about 50 mm. wide, and the esophagus is about as long as the 

 bell-diameter, the mouth-arms being somewhat longer. In common 

 with other species of Pelagia, the color is highly variable, but the bell 

 is usually rose-colored or violet, and the nettling-warts are violet. 

 The gonads are usually purple and the mouth-arms violet. 



There are 21 specimens of this medusa in the collection of the 

 Albatross from the Philippines; 10 (Cat. No. 28719, U.S.N.M. are 

 from Station 5422, March 30, 1909, from a tow made at a depth of 

 15 feet below the surface, about 10 miles off Lusaran Point Light, 

 between Panay and Guimaras; the largest specimen is 33 mm. wide 

 and with large gonads, while another 28 mm. wide has only small 

 gonads. Eleven young specimens (Cat. No. 28716, U.S.N.M.) were 



1 Medusae of the World, vol. 3, p. 565. 



