Medusce of the Philippines and of Torres Straits. 185 



Cephea cephea var. ceerulea, non typical. 



Cephea caerulea, VANHOFFEN, 1902, Wissen. Ergeb. deutsch. Tiefsee Expedition, Valdivia, Bd. 3, 

 Lief. 1, p. 45, Taf. 4, Fign. 13, 14. MAYER, 1910, Medusae of the World, vol. 3, p. 657. 



One well-preserved specimen of this medusa was found by the Albatross at 

 Station D 5457, June 8, 1909, 5 miles off Legaspi Light, east coast of Luzon. 



The bell is flat, 109 mm. wide, with a low dome-like apex 34 mm. wide which 

 is completely covered with long, conical, wart-shaped protuberances. There 

 are 2 small ocular and 8 completely fused velar lappets in each octant, forming 

 mere exumbrella thickenings on the exumbrella side of the bell-wall, and 

 bridged over en the subumbrella side by a web of tissue. The arm-disk is 

 50 mm. wide and the mouth-arms are laterally flattened, 29 mm. wide in the 

 radial direction, and 44 mm. long. There are 3 to 6 slender filaments among 

 the mouths of each mouth-arm. These taper to pointed ends and the longest 

 are only 13 mm. long. There are no filaments upon the central parts of the 

 arm-disk, but there are some at the bases of the mouth-arms. The filaments 

 are thus much smaller and less numerous than in Vanhoffen's C. ceerulea from 

 the east coast of Africa. 



There are 8 rhopalar radial-canals which extend straight to the sense- 

 organs, and in addition there are from 5 to 7 inter-rhopalar canals in each 

 octant, which anastomose and lose their identity in a wide network of vessels 

 which send branches to the rhopalar canals. The subgenital porticus is 

 unitary. A color note states that the mouth-arms were pale hyaline blue and 

 raw umber in color. 



Cephea, sp. 



Five specimens of Cephea, too poorly preserved to be determined specifically, 

 were collected at the following stations: 



April 25, 1909, from Manila Bay, surface. 



April 29, 1909, from Manila Bay, behind the breakwater. 



D 5452, June 7, 1909, off Legaspi Island, east coast of Luzon. 



D 5453, June 7, 1909, off Legaspi Island, east coast of Luzon. 



D 5461, June 14, 1909, Carino Island, east coast of Luzon. 



Light (1914) records Cephea cephea from Manila Bay in January 1912. 



Genus COTYLORHIZA L. Agassiz, 1862. 



Cotylorhiza, AGASSIZ, L., 1862, Cont. Nat. Hist. U. S., vol. 4, p. 152. 



GENERIC CHARACTERS. 



Rhizostomata dichotoma with 8 simple, bifurcated mouth-arms, the terminal 

 branches of which branch pinnately. The 4 subgenital ostia are simple and 

 funnel-shaped, and there is a single subgenital porticus. The appendages 

 upon the mouth-arms are mounted upon pedunculated filaments. There are 

 8 marginal sense-organs and numerous radial-canals which anastomose lat- 

 erally without any definite ring-canal in the adult. The sense-clubs have no 

 ocelli and no exumbrella sensory pit. There is a unitary peripheral zone of 

 circular muscles and an inner zone of radial-muscles in the subumbrella. The 

 exumbrella is smooth and without an aboral " sucker-like " depression, but with 

 a prominent central dome without wart-shaped elevations upon it. 



Cotylorhiza pacific a. sp. nov. 



A single specimen of this interesting medusa was obtained at the launch 

 landing in Manila Bay, Luzon, Philippine Islands, on January 24, 1908. 

 Unfortunately it was cut into several pieces before being preserved and this 



