Ig12.] R.B. SEymMour-SEWELL,: Surface-Living Copepoda. 367 
@ Length 1°38 mm. 
The last thoracic segment terminates in a short spine. 
The abdomen is contained 2} times in the length of the cephalo- 
thorax. ‘The Ist segment viewed from above is symmetrical and 
somewhat efobular in shape, ventrally there is a well-marked 
genital swelling. The 2nd segment is produced ventrally in the 
middle line in a short spine, its length is about half that of the 
genital segment. 
The furcal joints are about twice as long as broad; they are 
slightly asymmetrical, that on the right: side being broader than 
the left. 
The ist antennae consist of 23 joints. The proportional 
lengths of the joints are as follows :— 
I. 2.3. 4. 5. 6.7.8 9. 10, 11. 12. 13. 14. 15. 16, 17. 18. 19. 20. 21. 22. 23. 
TON ZL Fels TOm1 3a 7S e Coke.) L4e TOs) 1 Om 25. 200-30.) 290,34. 25. 182, 12-520.) 24, 
In the male the proportional lengths of the joints of the 
left antenna are :— 
I. 2. 3. 4. 5. 6. 7.8.9. 10, II. 12. 13. 14. 15. 16. 17. 18. 19. 20. 21. 22. 23. 
LOM2T 7 eat Se L7ies LO On On Que Oe L320, ZO. 27 27m B00 92 37 24 LOneInS pel Onn 2 Te 
The 2nd segment of the 2nd maxilla bears three spines and 
the proximal spine of the 3rd segment is longer and much stouter 
than the distal. 
The 1st leg resembles that of the male in having a single 
jointed endopodite and in the absence of any hair on the basio- 
podite. 
The terminal spine on the exopodite of the 3rd Jeg is, as in 
the male, two-thirds the length of the last segment. 
In the 5th legs the terminal segments are almost sym- 
metrical, are slightly curved inwards and bear on their inner margin 
two setae. The outer border carries three spines, the first about 
the middle of its length and the other two close together near the 
tip, which ends in a single stout spine. These external spines on 
the left side are blunt and pigmented, and on the right are sharp 
and devoid of pigment. 
3. Candacia catula (Giesbrecht). 
This species appears to be very rare in this region, only a 
single male specimen was obtained in locality O and one female 
in locality P. 
4. Candacia discaudata, A. Scott. 
Occurrence: Localities B, D, E, F, J, K, L, M, N, O, P. 
A considerable number of specimens, both males and females, 
were obtained, especially in localities F, 1, M. They were all 
quite typical, agreeing exactly with the description given by Scott 
(Siboga Expedition. Copepoda, pt. I, p. 157, pl. xvii, figs. 1o—20, 
1909). 
