SCYPHOMEDUSAE COLLECTED BY STEAMEK " ALBATROSS." 229 



terminate each in a naked knob. Among characters of minor im- 

 portance the subgenital ostia are usually wider than the perradial 

 disk-columns. The circular muscles of the subumbrella are prac- 

 tically entire. The sense clubs have each an occellus and a well- 

 developed exumbrella pit with radiating furrows. This genus is dis- 

 tinguished from the closely allied Thysanostoma only by the naked, 

 club-shaped extremities of its mouth-arms. 



LORIFERA LORIFERA, var. PACIFICA (Schultze). 



Himanostoma loriferum, var. paciflca Schultze, L. S., 1897, Abhandlung, 



Senckenberg, Naturf. Gesell., vol. 24, Heft 2, p. 153, pi. 15, figs. 1, la, 6 ; 



1898, Denkschr. Med. Nat. Gesell. Jena, vol. 8, p. 446, pi. 34, fig. 9 (young 



medusa). 



Lorifera lorifera, var. paciflca Mayek, 1910, Medusae of the World, vol. 3, 



p. 695. 



A single half-grown specimen of this medusa, Cat. No. 28709, 



U.S.N.M., was found at Port Palapag, Luzon, by the United States 



Fisheries Bureau steamer Albatross on June 2, 1909, being captured 



through the use of dynamite. Its bell is 98 mm. wide, exumbrella 



finely granular, flatter than a hemisphere. The bell margin is badly 



damaged but there appear to be six to eight cleft or subdivided velar 



lappets in each octant. Their general contours are rounded, and 



interlobular clefts extend radially a short distance up the exumbrella 



surface. 



The eight rhopalia have each an ocellus, but no exumbrella pit. 

 Perradial diameter of arm disk, 55 mm.; width of subgenial ostia, 

 34 mm. ; width of perradial columns of arm disk, 12 mm. ; subgenital 

 porticus wide and unitary ; naked upper arm, 20 mm. long ; length of 

 the abaxial side of the mouth-bearing part of each arm, 35 mm.; 

 length of the terminal naked axial filament of each arm at least 

 40 mm., but all are broken at their ends. 



There is a thick felting of short filaments upon the arm disk. 

 The circular muscles are unitary, being only partially interrupted 

 in the eight principal radii. 



The eight radial canals are each about 3.5 mm. wide, and in addi- 

 tion there are about 8X10 slender radial canals, all of which anasto- 

 mose with one another and with the eight chief radial canals, form- 

 ing a wide network in the subumbrella. 



In formalin the eight chief radial canals are violet. 

 Schultze describes this medusa from Ternate and from Amboina, 

 Malay Archipelago. 



