198 Froceedings of the Royal Physical Society. 
dages on each side of its really beautiful parent. Of the 
parentage of these eggs there is no doubt ; but beyond that 
all else about them to me is dark. I also regret I must leave 
those figured at 6 and 7 (sketch exhibited) in the position of 
those " whom many fathers share," from not being able to 
affiliate them. The one figured at 6 occurred to me both at 
Fowey, in Cornwall, and at Peterhead, in Aberdeenshire. At 
the expense, I fear, of being tiresome, I cannot resist the 
opportunity of adding, that in the course of my turning up the 
stones between tide-marks, after the nests of Lamellaria ten- 
taculata, in March 1852, at Wick, I observed bluish masses 
of jelly-like matter, in which light yellowish spots showed 
through the transparent envelope. At first I took them for 
masses of ova of shell, or Nudibranchs; but on examining 
one carefully, I observed that at each end of the elongated 
mass there was a hole, and I fancied I could see something 
move in it. On passing my knife under it, a small dark, olive- 
green, iridescent worm, eel-like, glided out. This I secured, 
and found it to be one of the Nemertes, probably N. gracilis^ 
so abundant under stones, where black, decomposing vegetable 
matter is mingled with sand. From year to year ever since I 
have noticed these jelly-like masses, with the attendant worms. 
Last night (3d May 1860), I found five or six nests of them 
under one stone, and as they were farther advanced than 
those I first found, instead of the Nemertes being in the centre 
of the mass, they lay either close alongside of it, or partly 
across it, thus showing attachment to its nest. I have often 
transferred these worms and nests to my aquaria, but have 
never been able to get the eggs to hatch. As they are gene- 
rally on large stones, I am obliged to use force to get a piece 
sufficiently small for my purpose ; this, added to not being 
able to associate them with proper material, and in the posi- 
tion they occupy in their native element, will account for 
failure. The ova are arranged in two rows, as may be seen 
through the glairy mass, and in trefoil-like spots. These 
masses are from two to three inches in length, and about one- 
fourth of an inch across, and high. They are very tough and 
elastic. 
Dr T. Strethill Wright stated that he had, in company 
