180 BRITISH COPEPODA. 



caudal segments very short ; principal tail- setae nearly 

 equal to the length of the body ; outer setse 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 -^-th of 

 an inch (*98 mm.), of the male -^th of an inch 

 (*64 mm.). 



This species occurs often abundantly on the fronds 

 of Laminarice ; on the coasts of Northumberland and 

 Durham, wherever L. saccharina grows, it may be 

 found plentifully; also in Shetland (Rev. A. M. 

 Norman), Yentry Bay (Rev. E. 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 Europe except by M. Boeck, in Norway. 

 In this respect it is a match for Cythere albomaculata 

 amongst the Ostracoda, an excessively common British 

 form, which has, as yet, not been recognised on the 

 continent of Europe. Mr. Norman (loc. cit.) has 

 proposed a new genus for the reception of this 



