PART I. 
SCYPHOMEDUSA OF THE PHILIPPINE ISLANDS. 
DESCRIPTION OF SPECIES. 
Through the kindness of Dr. Hugh M. Smith, then Deputy Commis- 
sioner, now Commissioner, of Fisheries of the United States, the author 
was permitted to describe and figure some of the Albatross-Philippine 
scyphomeduse in volume III of “‘ Medusz of the World,” published by 
the Carnegie Institution of Washington in 1910. These are referred 
to, but are not here redescribed, unless some new facts have come to 
light since the date of the original description. 
Genus CARYBDEA Peéron and Lesueur, 1809. 
Carybdea, Péron ET LesuxrurR, 1809, Ann. Mus. Hist. Nat., Paris, tome 14, p. 332.—Mayer, 
1910, Medusz of the World, vol. 3, p. 506. 
GENERIC CHARACTERS. 
Carybdeide with 4 simple, interradial tentacles and pedalia. Velarium 
supported by 4 bracket-like frenule. Velar canals present. Stomach small 
and 4-sided. 
Carybdea rastonii Haacke. 
Carybdea rastonii, Haacke, 1887, Jena. Zeitsch. fir Naturwissen. Bd. 20, p. 591, Taf. 35, Fign. 
1-15.—Mayer, 1910, Medusz of the World, vol. 3, p. 508. 
There are two specimens of this medusa in the Albatross collection from the 
Philippines. They are apparently mature and their dimensions in millimeters 
are as follows: 
Locality and date. 
Taal Anchorage, 
Balayan Bay, 
Luzon, surface, 
Subig Bay, 
Luzon, surface, 
Jan. 6, ; Feb. 20, 1909. 
Height of bell 
Width of bell 
Length of pedalia 
Width of pedalia at base 
Width of pedalia at widest part 
Height of sensory niche above velar margin... 
Length of flexible shafts of tentacles 
This is the commonest Cubomedusa of the tropical Pacific, being widely 
distributed from South Australia to the Hawaiian Islands. It can be recog- 
nized by its prismatic, 4-sided bell, the pedalia being about one-fourth to one- 
third as long as the bell-height, flat and spatula-shaped and about three-fifths 
as wide as long. The sense-clubs have each 2 large median eyes and 4 small 
lateral ocelli. There are 4 short, branched, non-anastomosing velar canals 
in each quadrant of the velarium, 16 in all. Four very small branched tufts of 
gastric cirri. This medusa is very closely allied to Carybdea marsupialis of the 
Mediterranean, but is distinguished by having only 16 instead of 24 to 30 
velar canals, and by its somewhat more slender pedalia. In both forms the 
170 
