Medusce of the Philippines and of Torres Straits. 181 



A perfect specimen, found by the Albatross on March 8, 1908, at Station 

 D 5175, in the Sulu Sea, southeast of Cagayanes Islands, Philippine Islands, 

 had a bell 75 mm. wide, palps 46 long, central stomach 35 wide, contracted 

 tentacles 65 long, and with 25 to 30 finger-shaped projections upon each gonad. 



One large imperfect specimen about 97 mm. in diameter is from Station 

 D5291, July 23, 1908, depth of 173 fathoms, about 2.2 miles off Escarceo 

 Light, Southern Luzon. Only 3 gonads are left. These have between 14 to 

 26 papillae. 



Eight other specimens, of medium size are from Station D 5386, March 9, 

 1909. Depth 287 fathoms, about 25.3 miles off Arena Point, Ragay Gulf, 

 Luzon. 



One imperfect specimen is from Station D 5532, August 13, 1909, from 

 between Masbate and Leyte. Bell about 73 mm. wide and with 26 to 29 

 finger-shaped processes on the gonads. 



One perfect specimen is from Station D 5456, June 7, 1909, East coast of 

 Luzon, about 6.7 miles off Legaspi Light. 



Genus DISCOMEDUSA Claus, 1877. 



Discomedusa, CLAUS, 1877, Denkschrif t, Wien Acad., Bd. 38, p. 42. 

 Ulmar is -\-Umbrosa, HAECKEL, 1880, Syst. der Medusen, p. 545. 

 Umbrosa, MAAS, 1908, Expedition Antarctique Francaise, Meduses, p. 9. 



GENERIC CHARACTERS. 



Ulmaridse with 24 (3X8) tentacles, 32 (4X8) lappets, and 8 sense-organs. 

 The tentacles arise from the clefts between the marginal lappets. There are 

 8 simple, unbranched, adradial canals, 8 branched, perradial, and interradial 

 canals, and a marginal ring-canal. 



Discomedusa philippina Mayer. 



Discomedusa philippina, MAYER, 1910, Medusa? of the World, vol. 3, p. 607, fig. 388. 



This medusa bears a close resemblance to Parumbrosa polylobata Kishinouye 

 (1910, Journal College of Science, Tokyo, Japan, vol. 27, Art. 9, p. 19, plate 

 4, figs. 20-23) ; but in Kishinouye's medusa the marginal lobes are still further 

 divided, being 64 instead of 32 as in D. philippina. Moreover, the canal- 

 system appears to be less complex 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. 



Genus AURELLIA Peron and Lesueur, 1809. 



Aurellia, PERON ET LESUEUR, 1809, Annal. du Mus. Hist. Nat., Paris, tome 14, p. 357. 

 Aurelia, LAMARCK, 1817, Syst. Anim. sans Vertebres, tome 2, p. 512. 

 Aurellia, MAYER, 1910, Medusa of the World, vol. 3, p. 619. 



GENERIC CHARACTERS. 



SemcEostomata with a simple central mouth-opening which is surrounded by 

 4 well-developed, perradially situated, unbranched mouth-arms or palps. 

 8 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 4 interradial gonads and 4 well-developed 

 subgenital pits. 



