MADEIRA AND THE CANARY ISLANDS. 
151 
Fifth feet wanting in both sexes. Abdomen of male (fig. 4) 4- 
jointed, female 3-jointed, the basal joint of latter being somewhat 
heart-shaped, and having doubled circular genital apertures. 
The third abdominal 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. 
Claus, 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 sufficient 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. 
i) 
Family CTCLOPIDH1. 
OlTHONA CHALLEN GERTI, Brady . 
0. SPINIERONS, Boech. 
O. plumieera, 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 O. ylumifera give the species a very grace- 
ful appearance, and readily distinguish it from the others. 
Family HARPACTICIDiE. 
Longipedia coronata, Claus. 
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 very rare, we foun d 
widely distributed but not numerous. 
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