MADEIRA AND THE CATfARY ISLANDS. 



151 



Fifth feet wanting in both sexes. Abdomen of male (fig. 4) 4- 

 joiiited, female 3-jointed, the basal joint of latter being somewhat 

 heart-shaped, and having doubled circular genital apertures. 

 The third abdotninal joint is divided longitudinally, the inter- 

 vening span being filled with hyaline membrane. Caudal ter- 

 minations in female divergent, in male less so; both terminated 

 by four plumous setae on each side. Colour reddish brown. 



Males and females were both plentiful, and taken by surface 

 tow-net at all the places visited. Indeed this species seemed to 

 be more widespread than any other. 



Clans, in his memoir 'Die freilebenden Copepoden ' &c., gives 

 a figure (pi. xxxii. fig. 17) of a form which is evidently this species, 

 although the anterior antennae are not correctly represented. 

 He has informed me in a letter that the material at his disposal 

 was not sufiicient to enable him to describe the species. I have 

 therefore much pleasure in naming this form, which is so 

 abundant at the Canary Islands, after the distinguished natu- 

 ralist who first discovered it. 



Family CYCLOPID^. 



OlTHONA CHALLENGERIT, Brady. 



O. SPINIFRONS, Boeck. 

 O. PLUMIFERA, Dana. 

 O. SETiGER, Dana. 



All four species of this delicately organized genus were found 

 fairly plentifully and generally distributed. The long feathery 

 red-coloured plumes of 0. plicniifera ^{yq the species a very grace- 

 ful appearance, and realily distiuguish it from the others. 



Family HARPACTICID^. 



LONGIPEDIA COROXATA, CklUS. 



Setella GRACILIS, Dana. 



Various specimens of this species collected differed consider- 

 ably from each other in colour and form, but not sufficiently to be 

 considered specific. 



Euterpe gracilis, Claus. 



This minute species, hitherto considered veJ^y rare, we found 

 widely distributed bnt not numerous. 



13* 



