KLEDONE. 561 
proximal region of the arms and the mouth. ‘he dorsal- 
most pair of arms was loosely thrown back over the head, 
and while the ventralmost was pressed against the ventral 
posterior part of the body, the lateral pairs were thrust 
into the mantle cavity, and appeared to press vigorously 
against the visceral mass. ‘Then the arms were all 
twisted about in the water in an extraordinary spiral 
manner. After these preliminary indications of great 
excitement, and preparation for spawning, the Hledone 
seemed to settle down, the small circumoral suckers were 
approximated and extended so as to form a closed chamber 
over the region of the mouth. ‘hen the siphon was 
inserted into this chamber, and a number of eggs passed 
in. Next the circumoral suckers began to press 
the very sticky glutinous substance which accompanied 
the ova against the glass. 
The proximal part of the bunch of eggs, together 
with the adhesive disc, could now be seen, but the distal 
part of the bunch was still hidden by the bases of the 
arms. Next the suckers in this region moved the eggs 
about and appeared to arrange them in their final con- 
dition as described above. When first spawned the eggs 
have no definite central cord, but appear to be held 
together merely by the glutinous mass which accompanies 
them. Then the two ventral arms press the bunch firmly 
against the glass, and seem to test the firmness of the 
adhesion. The whole process, after the H/edone comes to 
rest before spawning, occupies from fifteen to twenty 
minutes. 
Eledone very rarely spawns when in captivity— 
possibly as a result of living under artificial conditions. 
_Hence the fact that it is never kept in aquaria throughout 
the winter may possibly be explained as the result of 
becoming egg-bound, as well as of too low a temperature. 
