208 BULLETIN 100, UNITED STATES NATIONAL MUSEUM. 



and is about as long as the bell-radius. There is also a spatula- 

 shaped appendage at the crotch of bifurcation of each mouth-arm. 

 These are somewhat stouter than the central appendages, about half 

 as long as the bell-radius, and their entoderm is bluish. There are 

 numerous, minute, spatulate appendages among the mouth-arms. 



The general color of the bell of the medusa is olive-brown. There 

 are 22 large, triangular white spots with forked outer ends near the 

 bell-margin in the radii of the sense-organs, and also (3X22) 66 

 short white streaks near the margin in the radii of the velar lappets. 

 There are 22 interradial, dull bluish streaks in the subumbrella alter- 

 nating with the rhopalia in position. 



This variety is distinguished by its bifurcated mouth-arms. Its 

 nearest ally appears to be Oassiopea andromeda, var. acycloblia 

 Schultze, from Amboina, but it differs in its color pattern, in the ab- 

 sence of a central dome, and in its simple bifurcated mouth-arms, 

 those of the Amboina medusa branching dichotomously. 



Oassiopea and<romeda is the common species of the Indian Ocean, 

 Red Sea, and Malay Archipelago, and Kellar records its having 

 wandered into the Suez Canal. It gives rise to numerous local 

 varieties. 



There are evidently a number of other varieties of Cassiopea in the 

 Philippines, for Light x describes Cassiopea polypoides, var. culion- 

 ensis, C. polypoides?, and C. medusa, new species. The last named 

 is distinguished by its very large mouth-arm appendages, which in 

 a medusa whose bell is 260 mm. in diameter are 110 mm. long and 

 7.5 mm. in diameter, being cylindrical near the base and flattened at 

 their outer ends. C. medusa is described from Culion Bay, Culion, 

 Philippine Islands. 



Genus CEPHEA Peron and Lesueur, 1809. 



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

 p. 360.— Mayer, 1910, Medusae of the World, vol. 3, p. 651. 



Generic Characters. — Ehizostomata dichotoma in which the eight 

 mouth-arms fork once dichotomously and each fork gives rise to 

 short dichotomous or dendritic branches. Solid, wart-shaped tuber- 

 cles at the center of the exumbrella. The central stomach gives rise 

 to eight rhopalar and numerous inter-rhopalar radial-canals, all of 

 which connect with a network of anastomsing vessels in a wide zone 

 near the margin. Rhopala without ocelli and without sensory pits 

 on the exumbrella. There is no definite ring-canal. Development 

 unknown. 



1 1914, Philippine Journal of Science, vol. 9, p. 201. 



