. The Danish Ingolf-expedition. Marine animals -- Arctic regions; Scientific expeditions; Arctic regions. i6 COPEPODA ill pes IV no secretory jDore corresponding to Se i Re III was seen and in Re II ^ III pes V only a single pore is found at the base of Se 3. The labrum shows in lateral view complete similarity to Sars' figure pi. I but has the anterior process less prominent than in most f-? examined by me. Y. (St. IV). Size: Varying from 2 (63° 43 L. N. 0-26 h. E.), (v8 + o-6) = 2-4. (South West of Iceland), 2-6 (Davis Strait), 2-S mm. (64° 56 L. N. 36' 19 L. W.) to 2-9 mm. (Jan Mayen). Gran
. The Danish Ingolf-expedition. Marine animals -- Arctic regions; Scientific expeditions; Arctic regions. i6 COPEPODA ill pes IV no secretory jDore corresponding to Se i Re III was seen and in Re II ^ III pes V only a single pore is found at the base of Se 3. The labrum shows in lateral view complete similarity to Sars' figure pi. I but has the anterior process less prominent than in most f-? examined by me. Y. (St. IV). Size: Varying from 2 (63° 43 L. N. 0-26 h. E.), (v8 + o-6) = 2-4. (South West of Iceland), 2-6 (Davis Strait), 2-S mm. (64° 56 L. N. 36' 19 L. W.) to 2-9 mm. (Jan Mayen). Gran's specimens (-=- urosome) varied from 14—1-83 and specimens from due d' Orleans from 2—35 mm. This stage is easily distinguished by 3 abdominal somites, of which the third one is the longest, being 1,3 as long as the second one, and 26 as long as the first one. The number of setae in the furca is scarcely different. Tlie antennulae (with 25 segments) and mouth-appendages (including. Textfigure 3. Ca/. finmarchicus G. ( 85. b. Abdomen from the left. X 85. c. Pes II dcxt. Re in post, ^^ew. X no- d. Pes III sin. in anterior \Hiew. X no. e Pes IV sin. in anterior view. X no. f. Pes V sin. in lateral view. X 150 the labrum, exteriorly as well as in oral view) except the Le of the maxillnlae, which only possess 9 setae, are scarcely different from i^. Pes I has the Ri II -III fused and an indistinct articular mem- brane between Ri I and II; the Re II—III are also fused but in other respects this appendage is scarcely different. Pes II—III have the same segments fused, the vSe Ri II is missing, but Ri has 10 setae as usual; the Re II c^ III have only 5 Si. The pes IV differs from the preceding pair by 8 setae only of Ri (textfig. 2 b). The pes V is more clumsy than in stage V with midivided Ri with 6 setae and undivided Re with 4 Si and 3 Se. The inner margin of basipodite II has 3 teeth (textfig. 2 c). Secretory pores are in pes II—IV wanting in Re III, corresponding to
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