1912.]| R. B. SEYMOUR-SEWELL: Surjace-Living Copepoda. 357 
by Wolfenden in the Maldive and Laccadive Archipelagoes ; that 
is to say, they have no teeth on the external margin of the last seg- 
ments of the 2nd or ard legs, and_ in addition, the fine denticula- 
tion on the proximal segment of the basipodite of the 5th legs and 
the spines on the margin of the Ist and 2nd abdominal segments, 
which are met with in U. darwint, are absent in these specimens. 
I agree with Wolfenden in thinking that these are Danse 
the female Undinula caroli. No males were obtained. 
5- Undinula caroli (Giesbrecht) var. plumulosus, nov. 
Two specimens showing the plumose variation of the furcal 
setae were found in locality K. 
Genus Eucalanus, Dana. 
I. Eucalanus attenuatus (Dana). 
A few specimens only were taken in localities O, P. They all 
differed slightly from the description given by Giesbrecht, in 
possessing a more pointed forehead. In this respect they much 
more nearly resembled Eucalanus elongatus. 
2. Eucalanus crassus, Giesbrecht. 
@ccutreuce*Eocalities D>. b, M, O, PO, 
A considerable variation in colouration was found to be 
present ; in a few specimens the pigmentation was well marked and 
closely resembled the figure in Giesbrecht, the setae on the 
exopodite of the mandible being bright crimson ; in the majority, 
however, all trace of pigmentation was absent. 
The females were covered ali over the posterior part of the 
cephalo-thorax and the Ist abdominal segment with short close-set 
hairs. In the males, however, this was not the case. 
In one male specimen the 5th leg was found to terminate in 
two apical hairs, the distal end of the last segment being slightly 
bifid, and a specimen of a female was found in which a rudimen- 
tary 5th left leg was present; in structure this extra leg closely 
resembled that normally present in the male, though slightly 
smaller in size. 
3. Eucalanus monachus, Giesbrecht. 
Occurrence | Tocalitics. 4 Geer. O- Pb: 
This species was comparatively rare especially in locality H. 
in which only three specimens were obtained. 
4. Eucalanus pileatus, Giesbrecht. 
Occurrences Localities: j,i -M, P, ©: 
This species also was not common, except in locality J 
where it formed 6% of the whole catch. 
