202 Papers from the Department of Marine Biology. 
flattened, hollow, basal bulbs which are not flanked by cirri. The basal bulbs 
extend upward over the exumbrella in the manner described by Browne for 
Eutima curva. There are about 64 short, blunt excretory papille upon the bell- 
margin and about one-quarter of these are flanked by one or occasionally two 
short coiled cirri. A dense black pigment collects in these excretory papille 
but is discharged if the medusa be left for several days in an aquarium without 
food. There are 8 adradial lithocysts, each with 7 to 9 spherical concretions. 
The gelatinous peduncle is about 1.25 times as long as the bell-diameter, and 
is conical above, and slender, 4-sided, and prismatic below. The stomach is 
about one-fifth as long as the peduncle, and there are 4 recurved and com- 
plexly crumpled lips. The 8 gonads are developed upon those parts of the 
radial-canals which lie over the subumbrella and the peduncle, but appear to 
reach maturity only over the peduncle. The gonads, stomach, and tentacle 
bulbs are dull milky in color, all other parts being transparent. 
The nearest ally of this medusa is Hutima elephas of the North Sea and 
Tropical Atlantic, but in this form there are no cirri upon the bell-margin. It 
is also closely related to Hutima mira, but the laterally flattened tentacle bulbs 
which extend part way up the sides of the exumbrella appear to distinguish it 
from this common Atlantic Hutima. 
Genus RHOPALONEMA Gegenbaur, 1856. 
Rhopalonema (in part), GEGENBAUR, 1856, Zeit. fiir Wissen. Zool., Bd. 8, p. 245. 
GENERIC CHARACTERS. 
Trachymeduse with 8 well-developed tentacles in the radii of the 8 radial- 
canals, and with 8 or more club-shaped or cirrus-like tentacles. All tentacles 
arise from the bell-margin in a single row. The 8 gonads are developed upon 
the 8 radial-canals. 4 lips. Stomach without a peduncle. Lithocyst clubs 
in inclosed cavities on the bell-margin. 
Rhopalonema velatum Gegenbaur. 
(Plate 2, Fig. 4.) 
Rhopalonema velatum, GEGENBAUR, 1856, Zeit. fiir Wissen. Zool., Bd. 8, p. 251, figs. 1-5.—Mayur, 
1910, Medusz of the World, vol. 2, p. 378, figs. 214-219. 
Specimens of this widely distributed medusa were found off the Murray 
Islands, Queensland, Australia, in September and October 1913. The bell 
was nearly hemispherical, thin-walled, and about 8 mm. in diameter. There 
were 16 tentacles and 16 lithocysts following the tentacles in clockwise rotation 
around the edge of the bell. The linear gonads occupied the middle thirds of 
the 8 radial-canals. The manubrium had 4 lips, and the velum was well 
developed. The entodermal lamella of the bell was bottle green, all other 
parts being colorless. 
