620 On some Meduse from Japan. 
“Colour: Transparent and white, the gonads only are 
slightly rose-coloured. 
“ Size: Diameter of the umbrella 150 millim. Height 30- 
35 millim.” 
The present specimen is 105 millim. broad and 30 millim. 
thick ; the arrangement of its gastrovascular canals is exactly 
similar to that of the normal typical A. aurita found in the 
Atlantic ; three canals proceed from each genital sinus, viz. a 
trichotomously branched interradial and two simple adradial, 
the three secondary branches of the interradial originating from 
a common point on the edge of the sinus; possibly a variation 
in the breadth of the common centre of origin of these branches 
leads Kishinouye to give 3-5 as the number of canals origi- 
nating from the edge of the sinus. 
The orifices of the subgenital pits are oval, and 5 x 4 millim. 
in diameter ; the cavities to which they lead stand out more 
clearly than in the typical A. aurita. 
In having broad and folded lobes on the proximal halves of 
the mouth-arms, var. japonica differs from the typical A.aurita, 
but therein resembles A. aurita, var. cruciata, Haeckel, the 
typical form being “nicht gelappt,” and the var. cruciata 
“oelappt” (3. pp. 553, 644). The radius of the umbrella is 
three times that of the gonads. 
If, as Vanhdéffen (10. p. 43) and Maas (6. p. 26) assume, 
Aurelia colpota, Brandt, is only a variety of Aurelia aurita, 
then the distribution of Aurelia aurita extends over the 
Atlantic, Indian, and Pacific Oceans. 
Nine species of Aurelia are described in Haeckel’s ‘ System,’ 
viz. A. aurita, Linn.; cruciata, Haeckel; colpota, Brandt ; 
flavidula, Péron and Lesueur; marginalis, L. Agassiz ; 
hyalina, Brandt; labéata, Chamisso and Hysenhardt; clausa, 
Lesson; and limbata, Brandt. 
The following five have since been described :-— 
A. dubia, Vanhoffen (9. p. 20). Persian Gulf. 
A. habanensis, Mayer (7. p. 69, pl. xxiv. figs. 3, 4; pl. xxvi. 
fig. 86). Tortugas and Havana. 
A. japonica, Kishinouye (4. pp. 289-291, pl. vii.). Inland 
Sea, Japan. 
A. vitiana, Agassiz and Mayer (1. p. 171, pl. x. fig. 35). 
Fiji Islands. 
A, cerulea, Lendenfeld (5. p. 280). Port Jackson, N.S.W. 
Of these five, A. vitiana is, according to Maas (6. p. 26), 
synonymous with Aurelia aurita, var. colpota, Brandt. A. 
dubia, habanensis, and japonica may also be regarded as 
varieties of Aurelia aurita. A. ewrulea belongs to Haeckel’s 
subgenus Aureclissa, including A. limbata, labiata, and clausa. 
