128 BULLETIN : 
pi pd pd pd pd pd konn 
d o — — 0 — n 8 O 
Co do — CQ rto S SPR On 0 O tto 
ow 
With 
wm Co b 
— co 
Be oe — P. 
nw 
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bo CoN O c5 
MUSEUM OF COMPARATIVE ZOOLOGY. 
PRN ROR OWRF BRK WWOW SO 
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nes 
PR TR PE RoR PO 
— 
| 
4 females. 
8 “ 
3 specimens. 
2 females. 
1 “ 
1 e 
1 [11] 
1 male. 
1 female 
1 «€ 
1 of 
1 “ 
1 male. 
1 female. 
1 [1j 
1 [11 
"ive Radial Canals, or Four and Five with Fork. 
1 female. 
2 females and 1 male. 
1 4€ 
1 male. 
1 female. 
1 “ 
T “ 
1 male. 
1 LI] 
1 female. 
1 
1 male. 
4 females and 1 male. 
“ 
3 females and 1 male. 
The variations in the shape of the genitals from a circular to an ellip- 
tical outline to lobate, foliate, or elongate shape (Plate VIII. Fig. 21) is 
usually connected with the growing together of the genitals of adjoin- | 
ing radial canals (Plate VIII. Fig. 18) or with their separation into two 
distinct bodies when the radial canals fork (Plate III. Figs. I, 5). 
Tt will be seen that in Eucope, as has been observed in Aurelia, the 
tendency in the numerical variation of the genitals is greatest in the 
direction of an increase rather than a diminution in their number. 
similar tendency is also noticed in the numerical variation of the radial 
canals of the otoliths. 
A. 
