204 BULLETIN 100, UNITED STATES NATIONAL MUSEUM. 



art. 9, p. 19, pi. 4, figs. 20-23) ; but in Kishinouye's medusa the mar- 

 ginal lobes are still further divided, being 64 instead of 32 as in 

 D. philippina. Moreover, the canal system appears to be less com- 

 plex in its branching in P. polylobata, so that it seems probable that 

 the two are distinct species, not mere growth-stages one of the other. 

 Should this view prove erroneous, however, the medusa should be 

 called Parumbrosa polylobata Kishinouye. 



Six specimens were collected by Fisheries steamer Albatross, sta- 

 tion 5213, Masbate Island, Philippine Islands, April 20, 1908. (Cat. 

 No. 27948, U.S.N.M. Type.) 



Genus AURELLIA Peron and Lesueur, 1809. 



Aurellia Peron and Lesueur, 1809, Annal. du Mus. Hist. Nat., Paris, vol. 14, 



p. 357. 

 Aurelia Lamarck, 1817, Syst. Aniin. sans Vertebres, vol. 2. p. 512. 

 Aurellia Mayer, 1910, Medusae of the World, vol. 3, p. 619. 



Generic Characters. — Semaeostomata with a simple central mouth- 

 opening, which is surrounded by four well-developed, perradially 

 situated, unbranched mouth-arms or palps. Eight marginal sense- 

 organs. The tentacles are small and alternate with an equal number 

 of short lappets. Both tentacles and lappets arise from the sides of 

 the exumbrella a short distance above bell-margin. The bell-margin 

 is divided into 8 or 16 broad velar lobes. The central stomach gives 

 rise to a number of branched, radiating canals which anastomose and 

 are connected by a marginal ring-canal. There are four interradial 

 gonads and four well-developed subgenital pits. 



AURELLIA AURITA (Linnaeus). 



Medusa aurita Linnaeus, 1758, Systema Naturae, ed. 10, vol. 1, p. 660. 

 Aurellia flavidula Peron and Lesueur, 1809, Annal. du Mus. Hist. Nat., 



Paris, vol. 14, p. 369. 

 Aurellia aurita Lamarck, 1S17, Hist. Anim. sans Vert., vol. 2, p. 513. — 



Mayer, 1910, Medusae of the World, vol. 3, p. 623. 



Some 13 specimens of this universally distributed medusa were 

 found by the Albatross among the Philippine Islands. Of these, 11 

 half -grown specimens (Cat. No. 28718, U.S.N.M.) are from station 

 D 5663, December 28, 1909, in Macassar Strait, depth 11 fathoms, 

 about 1.7 miles off Kapoposang Island, 7h. 20m. p. m., while 2 larger 

 but still immature are from Station D 5662, December 21, 1909, Flores 

 Sea, near Tana Keke Island, 5h. 40m. to 6h. 12m. a. m. There are 

 only 8 notches in the bell margin corresponding to the 8 rhopalia, 

 instead of 16 notches, 8 rhopalar and 8 inter-rhopalar as in Aurellia 

 labiata. 



Aurellia aurita is found in all seas from the Polar regions to the 

 Tropics. In the Tropics it lives very close to its heat death-temper- 



