OBSERVATIONS ON HOTARU-IKA WATASENIA SCINTILI-ANS. 83 
at the posterior end of this ramus, and piercing through the matrix of the 
gland it finally opens to the posterior end of the inner face of the lobe. The 
inner face of the lobes are divided into numerous fine lamellae and secret 
some albuminous substance (PI. II, fig. ii). 
Judging from the above facts, it seems that the eggs when mature, are 
finally discharged between the lobes of the nidamental gland, whence they are 
covered with albuminous substance secreted from the lamellae thereon. 
Then they are dispelled through the siphon. 
6. Number of Ovarian Eggs of the Female- 
The number of the mature eggs was reckoned from the females which 
were directly obtained from the net, on the ground that otherwise the speci- 
mens might have sustained some harsh treatment and so have lost some of 
their eggs. By this count, it was found that the number of mature eggs 
varies in the different individuals, and the largest number is about 1200. 
The actual numbers of the mature eggs of 25 females caught at the same 
time, together with the numbers of spermatophores fixed by the male on both 
sides of the nape of these females, are shown in the following table : 
^"^^^Cliaracters 
Specimens\^ 
Mantle-length 
Approximate 
number of 
eggs 
Number of spermatophores 
m m. 
left 
right 
I 
684 
7 
6 
2 
67.6 
960 
7 
7 
3 
67.0 
950 
7 
7 
4 
67.0 
950 
5 
4 
5 
65-5 
1,200 
5 
7 
6 
65.5 
850 
5 
6 
7 
65.0 
1,080 
6 
7 
8 
64.0 
1,050 
8 
8 
9 
63.0 
1,100 
I 
6 
10 
63.0 
850 
6 
8 
1 1 
63.0 
600 
7 
3 
