. The Danish Ingolf-expedition. Marine animals -- Arctic regions; Scientific expeditions; Arctic regions. 156 COPEPODA r^ U- The lamina labialis does not show auy features of interest (fig. 2 d); the area in front of it is most hke that of Chiridms\ it consists of a lateral, somewhat convex, row of fairly long setae and two median, well separated, groups, as shown in fig. Behind the lamina and between the labial lobes, which were not studied in detail, no setae were observed. Ycf (St. V). Size of specimen from St. 183 was 9 mm.; anterior division 6-5 mm.; urosome 2-5 mm. The shape of the body
. The Danish Ingolf-expedition. Marine animals -- Arctic regions; Scientific expeditions; Arctic regions. 156 COPEPODA r^ U- The lamina labialis does not show auy features of interest (fig. 2 d); the area in front of it is most hke that of Chiridms\ it consists of a lateral, somewhat convex, row of fairly long setae and two median, well separated, groups, as shown in fig. Behind the lamina and between the labial lobes, which were not studied in detail, no setae were observed. Ycf (St. V). Size of specimen from St. 183 was 9 mm.; anterior division 6-5 mm.; urosome 2-5 mm. The shape of the body is in main respects like that of the females, but the lateral corner of the thorax has a small tooth; of the four abdominal somites the second is longer than the third, which is as long as the first. The measurements of the antennulae are somewhat different; the segments 17 and 19, which are of equal length, are 1-24 as long as 24-^^25, and 2-5 as long as segment 14. The other appendages do not seem to show differences of any importance; the Re of the maxillulae pos- sess, as usual in this stage, only 10 setae. The pes V of the male is somewhat like that of Eiichcpte\ the Ri, which is almost twice as long on the right side as on the left side, is distally rounded without any spines; the Re, which are of almost equal length, are continued into a rather strong spine (St), and have on each side one or two Se, as well as 2 or 3 Si. The structure of the pes V is distinctly diffe- rent from Scott's fig. 26 of the corres- ponding pair of legs in , as well as from Brady's fig. 5 of Euchate gi^as. Y (St. III). Specimen from Thor St. 183: 5-58 mm.; anterior division 4-5; urosome i-o8. The rostrum and the frontal parts are like those of the adult females; the lateral corners are neither jDroduccd nor pointed; the first as well as the fifth thoracic tergites are well marked out. The abdomen consists of two somites, of which the terminal one is almost twice as long as the basal one.
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Keywords: ., bookcentury1800, bookdecade1890, booksu, booksubjectarcticregions
