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of the cephalic and thoracic segments are pointed. The segments are produced dorsally in the 
middle line into triangular projections. The rostrum is large and prominent. The frontal margin is 
truncate. The genital segment is large and much produced posteriorly. The distal ends of the 
genital segment extend to about the middle of the furcal joints. The furcal joints are three times 
longer than broad. The outer margin of the joints is not furnished with a seta (Plate LXV, fig. 6). 
The antennules are composed of seven joints. The fifth and sixth joints are very small. 
The antennae, mandibles, maxillae and maxillipedes are similar to those of the previous 
species. 
The exopodite of the first pair of feet is slender. The first joint is distinctly longer than 
the second joint. The third joint is very short. It is armed with one stout and one slender 
curved claw. The endopodite is much shorter than the exopodite. The joints are of nearly 
equal length, but the first joint is wider than the second joint. The apex of the second joint 
is furnished with two pointed spines and two seta (Plate LXV, fig. 9). 
The second, third and fourth pairs of feet are similar to those of Peltdium purpureum. 
The fifth pair of feet is moderately stout. The second joint is furnished with two outer 
edge setae, two apical setae, and one inner edge seta (Plate LXV, fig. 10). 
Male unknown. 
This species can readily be separated from the other members of the genus by the 
comparatively slender furcal joints which have no median outer marginal seta, and by the 
arrangement of the setae on the fifth pair of feet. 
Occurrence. — One specimen was found in the surface plankton collected at Station 
213, Saleyer Island. 
3. Peltidium exiguum nov. sp. Plate LXV, figs. 11—15. 
Female — length .g8 mm. 
Seen from above, the body appears moderately broad and rather depressed. It is oblong 
ovate in outline. The greatest width is at the distal end of the cephalic segment and is equal 
to rather less than half the length of the entire animal. The distal ends of the cephalic and 
thoracic segments are pointed. The segments are produced dorsally in the median line into 
triangular projections. The rostrum is rather wide but it is not very prominent. The frontal 
margin is broadly rounded. The genital segment is large and broad. The pointed distal ends 
of the segment scarcely reach to the end of the anal segment. The furcal joints are moderately 
broad and fully twice as long as wide. The middle of the outer margin of the joints is furnished 
with a short seta (Plate LXV, fig. 11). 
The antennules are composed of six joints. The fifth joint is very small. 
The antennae, mandibles, maxillae and maxillipedes are similar to those of Peltidium 
entermedium. The terminal claw on the second joint of the second pair of maxillipedes is 
comparatively stout and is blunt pointed. 
The exopodite of the first pair of feet is moderately stout. The first and second joints 
are of nearly equal length. The third joint is very small and is furnished with three curved 
claws. The outer one is smaller than the others. The middle claw is comparatively stout. The 
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