_ some Meduse from Japan. 619 
tentacles, which vary in number from fifty-two to eighty, 
proceed from the margin at different angles, the direction of 
the older proceeding in a direction more backwards and 
upwards tl.an the younger; the radial and interradial tentacles 
pass through well-marked peronial grooves, rooted over by 
peronia with closely apposed edges; in the younger tentacles 
the edges of the peronia do not meet, and in the youngest are 
not formed at all. 
In the Japanese specimens there are more otocysts than 
tentacles. In one quadrant of the margin I counted thirty 
otocysts te twenty tentacles. 
In their description (/oc. cit.) of G. Agassizii, Murbach and 
Shearer state that there are not so many otocysts as tentacles, 
but that there exists no definite regularity. In the twenty 
intervals between the tentacles of a quadrant I counted the 
number of otocysts as follows—2122112121212213 
10 2 1—~. e. 30 in all, mostly alternating as 2 and 1. 
Of the four known species of Gonionemus one, viz. 
G. Muibachii, Mayer, is found in the Atlantic (at Woods 
Holl, Mass.), the other three in the Pacific, G. vertens, 
A. Agassiz, occurring off British Columbia, G. Agassizii, 
Murbach and Shearer, off the Aleutian Islands and in the 
Inland Sea, and G. suvaensis, Agassiz and Mayer, off the 
Fiji Islands. 
DISCOMEDUS4. 
Aurelia aurita, Linn., var. japonica, Kishinouye. 
Aurelia japonica, Kishinouye (4. pp. 289-291, pl. vii.). 
Mr. Gordon Smith’s collection contains one specimen of 
this form, well-preserved, excepting that the arms have been 
damaged. 
I was unable to obtain the volume of the Zool. Mag., Tokyo, 
containing Kishinouye’s description of Aurelia japonica, and 
learned that it was out of print; but Prof. Ijima was so 
extremely kind as to send me written extracts giving the 
descriptions of this and other species of Meduse described 
in the first six volumes. Kishinouye’s description runs as 
follows :— 
“Species Diagnosis: Umbrella flat, a little vaulted, 4-5 
times as broad as high. Hight velar flaps of the umbrella- 
margin not protruding; divided by slight stallow incisions only, 
Mouth-arms a little shorter than the radius of the umbrella ; 
their margins much curled and their proximal halves with 
broad and strongly folded lobes. Umbrella radius four times 
the radius of the gonads. At every genital bay 3-5 canal- 
roots. Sixteen dendritically branching canals form a few 
meshes only. 
