of the Fishery Board for Scotland. 
267 
inner margin of tho ovisacs is nearly straight, tlio outer margin forms a 
Hat but more or less regular curve ; they contain numerous, moderately 
largo ova, and, as a considerable number of the Copopods are females, we 
find, what in such circumstances might be expected, that the species is a 
comparatively common one, — we have obtained as many as sixteen 
specimens from a single cockle. 
The fact that this Lichomolgus has been obtained in cockles from the 
coast of Lancashire and from the Firth of Forth, and that most of the 
cockles examined were infested with the Copepod, seems to imply that it 
is a generally distributed species ; if this be so, it may then be of interest 
to inquire further, whether (a) the Lichomolgus is found at particular 
seasons or all the year round, (/;) as a semi-parasite or as commensal only, 
{c) if its presence has any connection with a healthy or unhealthy con- 
dition of the mollusc. Though Copepods, when present in more cr less 
abundance in fresh water, may, in some eases, be rightly considered as 
1 danger signals,' they are in themselves innoxious, and their presence, 
though sometimes in considerable numbers, in the cockles, may after all 
be no indication of hurtful conditions. 
Cyclopicera nigripes, Brady and Robertson. 
This handsome species has only recently been observed within the 
Forth area. It was obtained by washing a quantity of Zoophytes brought 
up in the trawl-net while working some miles east of May Island. This 
is readily distinguished from other species of Cyclopicera by its large size 
and by the dark colour of the foot-jaws and swimming feet. Dr Brady 
records its occurrence from several places of the North East Coast of 
England, Shetland (Norman), the Firth of Clyde, and from Lough Swilly, 
Ireland. I have taken it in Cromarty Firth and in East Loch Tarbert 
(Loch Fyne). 
Thysanoessa borealis (G. 0. Sars). 
This Schizopod has been taken in several parts of the Forth area. I 
am indebted to Rev. A. M. Norman for the name of the species. He also 
informs me that among a few Schizopoda sent to him, including the 
Thysanoessa, was what he considers to be a specimen of Nematocelis 
megalops (G. O. Sars.), but it wanted the long slender first pair of legs, 
which had become detached, and which form one of the chief distinctive 
characters of the species. The eyes of Thysanoessa and Nematocelis are 
distinctly constricted near the middle, so that they appear to consist of an 
under and upper eye, and this character enables them to be readily 
distinguished from Boreopliausia and Nyctijphanes. 
[Description of the Plates. 
