Meduse of the Philippines and of Torres Straits. 183 
Genus CASSIOPEA Péron and Lesueur, 1809. 
Cassiopea, PRON ET LesunuR, 1809, Annal. du Mus. Hist. Nat. Paris, tome 14, genre 24, p. 356. 
GENERIC CHARACTERS. 
Rhizostomata pinnata with 8 (4 pairs of) adradial, complexly branched 
mouth-arms, the lower or ventral surfaces of which bear numerous mouth- 
openings and vesicles. There are 4 gonads and 4 separate subgenital cavities. 
There are more than 8 marginal sense-organs and twice as many radial-canals 
as sense-organs. The radial-canals are placed in communication one with 
another by means of an anastomosing network of vessels. A well-defined 
ring-canal may or may not be present, but is commonly absent. 
Cassiopea andromeda var. baduensis, nov. var. 
Medusa andromeda, ForsK&u, 1775, Descript. que in Itinere Orientali Observavit, Haunie, p. 
107, tab. 31. 
Cassiopea andromeda, EscuscHo.7z, 1829, Syst. der Acalephen, p. 43. 
A specimen of this medusa is from Endeavour Strait between Australia and 
New Guinea, and was found by the Albatross on December 23, 1908. The 
bell is 101 mm. in diameter, flat without an aboral depression, and with 18 
Vie. 3.—Cassiopea andromeda var. baduensis. Aboral view of half of the exumbreila 
on the left. Oral view of 4 of the mouth-arms on the right. 
rhopalia. There are 4 to 8 usually 6 lappets between successive rhopalia. 
The arm-disk is octagonal, 36 mm. wide, and the 8 mouth-arms are each 34 mm. 
long and definitely bifurcated, the forks being 16 mm. long, thus nearly half 
as long as the total length of the mouth-arms. There are no appendages 
among the mouth-arms, but these may have been lost. The color has wholly 
faded in formalin. 
Another specimen of this medusa was found at Badu Island, Torres Straits, 
Australia, within a few miles of Endeavour Strait, by the Expedition of the 
Carnegie Institution of Washington, on November 5, 1913, and was studied 
alive. 
