of the Fishery Board for Scotland, 
307 
Habitat. — Attached to the eye of a sprat (?) in one of the Leith 
dry docks. One day in August la.st year, my son (John Scott) ob- 
served in one of the Leith dry docks (one of the two belonging to 
the Leith Dock Commission), from which the water was being pumped 
out, a parasite adhering to the eye of a young herring or sprat — 
one of a small shoal that had entered the dock while the gates were 
open — which, from his description, appears to belong to this species. 
*The parasite,' he says, 'had a long slender body, and long ovisacs.' 
The eye to which the parasite was attached appeared to be blind, for 
on one occasion he reached out his hand so close to the fish as almost 
to touch it. As he was about to lay hold of the fish it happened to 
turn so as to see his hand, and instantly darted off. A considerable 
number of the fish were left dead after the water was pumped out of 
the dock, but he failed to find among them the one with the parasite 
— it had probably been carried out with the water (as many of the 
other fish were) that had been pumped from the dock. Lerneonema 
spratta seems to be very rare in the Forth, although I have 
examined hundreds of sprats, I have failed to observe a single specimen 
of the parasite. So far as my son can remember, the body of the 
parasite he saw was of a greenish colour. He and others saw the fish 
with the parasite attached swimming about for a considerable time 
before the water was all pumped out of the dock, but ultimately lost' 
sight of it. 
Lerneocbrad^. 
Lemma hranchialis^ Linne.. 
1767. Lerncea hrancMalis, ' Systema Naturae,' edit. 12th. 
1850. Lemma hrancMalis, Baird, loc. cit., p. 344, pi. xxxv. fig. 12. 
Habitat. — Attached to the gills of the cod, haddock, and whiting. 
Frequent on such fish taken by us in the Forth, mostly on fish in 
poor condition, sometimes so many are adhering to the gills, that the 
gill-covers are kept from closing because of them. 
The parasitic Copepoda are an interesting group, and doubtless play an 
important part in the economy of nature. Dr Baird's work, which I have 
mainly followed in the preceding notes, is the only monograph we have 
on the British species, though several records have since been published 
through scientific societies and otherwise. 
OSTBACODA. 
Cytherid^. 
Cythere gibbosa, Brady and Kobertson. 
1869. Cythere gibbosa, Brady and Bobertson, ' Ann. and Mag. 
!N'at. Hist.,' ser. iv., vol. iii. p. 368, pi. xxi. figs. 1-3. 
1889. Cythere gibbosa, Brady and Norman, ' Mon. M. and F.-W. 
Ostrao. of the N. Atlantic and K-W. Europe,' p. 136, pi. 
xiv. figs. 30, 31. 
Habitat. — Brackish pools at the mouth of the Cocklemill Burn, Largo 
Bay; obtained July 12, 1890; frequent. This is very much a brackish- 
water species. It has been recorded from localities more or less purely 
marine. It would be interesting to know if specimens from such locali- 
ties were living ; those now recorded were so. 
