180 BRITISH COPEPODA. 
caudal seements very short; principal tail-setez nearly 
equal to the length of the body; outer setze about half 
as long. The eye consists of one central and two lateral 
lenses, and is of a ruby-red colour; the integument is 
marked by distant circular punctures or impressions, 
more especially near the edges of the carapace. Ovi- 
sac large, circular, and single. The colour of the 
animal is a clear yellowish brown or olive; there is 
usually, but not always, a brilliant ruby patch extend- 
ing nearly across the body behind the first segment, 
and the glandular organs are less distinctly tinged 
with the same colour. Length of the female g¢th of 
an imch (98 mm.), of the male 7,th of am) ingen 
(64 mm.). 
This species occurs often abundantly on the fronds 
of Laminarie ; on the coasts of Northumberland and 
Durham, wherever L. saccharina grows, it may be 
found plentifully; also in Shetland (fev. A. WM. 
Norman), Ventry Bay (fev. H. C. Davison), Clifden 
Bay, and the Scilly Islands. No doubt this list might 
easily be much extended. 
The brilliant colouring and considerable size of the - 
species render it a very showy and attractive object, 
and it is surprising that, as it occurs so commonly on 
the British shores, it should not yet have been noticed 
elsewhere in Hurope except by M. Boeck, in Norway. 
In this respect it is a match for Cythere albomaculata 
amone'st the Ostracoda, an excessively common British 
form, which has, as yet, not been recognised on the 
continent of Hurope. Mr. Norman (loc. cit.) has 
proposed a new genus for the reception of this 
