. The Danish Ingolf-Expedition. Scientific expeditions; Arctic Ocean. COPEPODA 213 and slender spines (text-fig. 67 a). The fifth tlioracic somite is well distinguished in front, and the regularly rounded lateral corners are scarcely produced. The abdomen is one third as long as the anterior division; the comparative length of the abdominal somites and the fnrca is 18, 67, 53, 48, 10 and 18. The antennulae extend at least to the end of the third abdominal somite; the shape is similar to that of ^". magmis, but the proximal part is straighter, the restrictions at the base of the basal segm
. The Danish Ingolf-Expedition. Scientific expeditions; Arctic Ocean. COPEPODA 213 and slender spines (text-fig. 67 a). The fifth tlioracic somite is well distinguished in front, and the regularly rounded lateral corners are scarcely produced. The abdomen is one third as long as the anterior division; the comparative length of the abdominal somites and the fnrca is 18, 67, 53, 48, 10 and 18. The antennulae extend at least to the end of the third abdominal somite; the shape is similar to that of ^". magmis, but the proximal part is straighter, the restrictions at the base of the basal segments are less pronounced, and the angle between segments 14 and 15 in less marked. Segments 83 9 are almost completely fused with 10—12, segments 20 and 21 and 24—25 are completely fused. The appendages are scarcely different from those of S. viagnns\ the segment 20 does not possess any setae. The segments 8'>ii2 are i-i as long as segments 23—25, not, as in 6". ywa^w?/^ and related species, much (1-5) .shorter, and segment 22 is 1-2 shorter than segment 19. The antenna are scarcely different from those of adult females, and the mandibulac are very much like, but the manducatory parts are less powerful, and the third basipodite is comparatively wider, with two short setae inwards, and a more distally placed knob representing a third one. The \a I of the inaxillulae is fairly well developed, and has at least 12 rather short and soft setae; in Li III only 4 setae were observed, but in other respects scarcely any difference was observed. The ii/axilluc have the sensory appendages, especialh- the amalliform ones, slightly developed; the maxillipeds are like those of S. magnus. The natatory legs are scarcely different from those of the female. The Jiftli pair of legs extends almost to the end of the abdomen, and shows great similarity to that of S. magnus. The right endopodite, which extends somewhat be>ond the end of the first outer segment, is styliform, with the
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectscienti, bookyear1915
