184 
The Irish Natvralist. August -September, 
orange-tipped papillae (fi^iured m the Monograph) is by no 
means so common there as forms suffused all over the body 
with orange tints of varying intensity. Another frequent 
colour form is one freckled or mettled with brown or the 
body, the papillae, and the rhinophores, this colour being 
associated on the back with spots and blotches of deep 
orange. The orange tips to the papillae are almost always 
present, yet two specimens, cream-coloured in the body., 
were found to have pure white papillae with colourless tips. 
Monstrosities were noticed in three individuals. All of 
these bore one or two forked papillae, and one a further 
monstrosity in the shape of a forked oral tentacle. The 
forked papillae were in all cases due to the fusing of two 
adjacent papillae, as was evident from the presence of 
double hepatic lobes, parallel below and diverging into 
the terminal forks. 
The species continues to spawn at intervals for several 
days. One individual isolated on the 6th July, 1913, laid 
5 distinct egg coils by the T4th July : another isolated on 
the 22nd of the same month laid 4 coils within 24 hours. 
The colour of the eggs varied from pure white to cream, 
and in one instance to a very pale pink. On the 17th July, 
1913, I had an opportunity of watching from start to finish, 
the operation of spawning as carried on by a full-grown 
specimen floating foot upward in a glass dish . The emission 
of the ribbon was not continuous, but intermittent, by a 
series of muscular efforts, each marked by a twitch or jerk 
of the animal's head. The coil reached the water surface 
through a deep sinus in the flexible foot margin, the body 
being throughout bent into a crescent shape. The whole 
operation occupied 30 minutes, and the egg ribbon when 
finally laid and left floating on the water surface was dis- 
posed in a coil and a half which, opened out, had a length 
of II mm. The successive stages of egg deposition were 
jclearly marked in regular trillings or indent a tioi:^s of the 
mucous envelope of the coil, a feature which is apparent 
also in Galvina exigua and less ckarly in Doto coronata. 
I observed egg deposition in one instance to take place in 
from 15 to 20 hours after pairing. 
