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exopodite is composed of two joints. The first joint is elongate and narrow. The second joint 
is short and dilated. The apex of the joint is furnished with a pad of hairs and a spine. The 
endopodite is one-jointed, and is in the form of a sickle-shaped spine, which-extends to the 
end of the exopodite. The distal half of the inner margin of the endopodite is finely serrate 
(plate XOXIS fies 14): 
Occurrence, — Four females and one male were found in the plankton collected 
with the HrENsEN vertical net at Station 148, 1000 metres to the surface. 
The fifth pair of the male of GirsBrecut’s species is not unlike the figure given in this 
report, but when a comparison is made, it is seen to be distinct. The base of the exopodite 
of the right foot is only slightly produced internally, and the endopodite of the left foot is 
very broad and strong. It is not sickle-shaped as in Macandrewella joanae. 
This genus and species is dedicated to the memory of my mother, whose encouragement 
did much to help me over many difficulties encountered in the study of the Copepoda. 
Genus Scottocalanus G. O. Sars, 1905 (). 
This genus was established by Sars in 1905 for a Scolectthrix-like form with a peculiar 
median crest and a very strong bifurcate rostrum. The structure of the fifth feet of the two 
sexes was also made a character of the genus. 
The typical species of the genus was first obtained by my father in the plankton col- 
lected in the Gulf of Guinea. It was described in the report ‘On Entomostraca from the Gulf of 
Guinea’ as Scolecithrix securztfrons. Both male and female were described, but is has since been 
shewn by Canu and Farran, that the form regarded as the male really belongs to another 
species. GIESBRECHT in 1895 described a closely allied species as Scolecethrix persecans. A good 
deal of confusion appears to have arisen in the identification of the two forms during the past 
few years, and an attempt is made to put these species on their true basis in the present report. 
Female. The head is completely fused with the first thoracic segment, and possesses a 
well defined chitinised crest on the forehead. The fourth and fifth thoracic segments are com- 
pletely fused. The rostrum is bifurcate and highly chitinised. Each ramus bears an apical spine 
and there is a distinct articulation between the spine and the basal portion. The abdomen is 
composed of four segments. The antennules are twenty-four-jointed. The antennae, mandibles, 
maxillae and mazxillipedes are somewhat similar to those of Scolecethricella, except that the 
apical lobe of the first maxilliped is furnished with a moderately stout and slightly curved 
claw. There are two types of sensory organs. Some are long and rounded at the apex. Others 
are shorter with distinctly swollen heads. The four pairs of swimming feet are similar to those 
of Scolecethricella, but the surface of the joints is only sparsely furnished with spines. The fifth 
pair is composed of one free joint attached to a basal part. The apex of the free joint bears 
one long curved spine, and one very short spine. The small spine is situated on the apex of 
the joint. The long spine is outside the small one and its position is usually subapical. 
Male. In general appearance it resembles the female. The abdomen is composed of five 
joints, and the genital segment is asymmetrical. The antennules are composed of nineteen to 
twenty joints. The antennae, mandibles, maxillae and maxillipedes are similar to those of the 
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