. The Danish Ingolf-expedition. Marine animals -- Arctic regions; Scientific expeditions; Arctic regions. 232 COPBPODA The Jirsi pair of legs is like that of the preceding species; the Se of the Re I extends some- what beyond the end of the Re II. The endopodite has on its posterior surface 3 + 2 spines; the exopodite has 5 spines at the base of Se Re I, 6 spines at the base of Si Re II, and near the inner margin of Re III three groups consisting of 4. 3 and 3 spines. The endopodite of the second pair of legs has a long j^ointed Se in the Re I; on the posterior surface of Ri I a group of 5 fai
. The Danish Ingolf-expedition. Marine animals -- Arctic regions; Scientific expeditions; Arctic regions. 232 COPBPODA The Jirsi pair of legs is like that of the preceding species; the Se of the Re I extends some- what beyond the end of the Re II. The endopodite has on its posterior surface 3 + 2 spines; the exopodite has 5 spines at the base of Se Re I, 6 spines at the base of Si Re II, and near the inner margin of Re III three groups consisting of 4. 3 and 3 spines. The endopodite of the second pair of legs has a long j^ointed Se in the Re I; on the posterior surface of Ri I a group of 5 fairly strong spines is found, and in Ri II two outer rows of 6 spines and an inner one of 8 weaker spines. The terminal seta, which is like that of the preceding species, is as long as the third outer segment; on the posterior surface of the third basipodite and the exopodite groups of rather short spines are found; the number of glandular pores is like that of O. niagtuts. The armature of the posterior surface of the fliird pair of legs is like that of tlie preceding species; the endopodite has 5 long spines in Ri I, a curved row of 7 long spines and an inner group of about 20 setae in Ri II, and in Ri III groups of 5 strong and 12 short .spines; the exopodite has a number of short spines and bristles. The third outer segment is, as shown in text-fig. 73 b, curiously short, probably due to ac- cident; a similar abnormal structure has been described by Wolfenden in the fourth pair of legs of the male of C. chcli/er (1911 p. 283). T\\q foitr/ii pair of legs has the armature somewhat less developed, but the third outer segment was formed in a similar way. The terminal segments of the third and fourth pairs of legs were only examined on the left side, as thev were wantine on the right side. The Ji/fh pair of legs (text-figs 74 c—e) con- sists of three segments, which are almost com- pletely smooth on the anterior surface, but post- eriorly at least in distal half of the se
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Keywords: ., bookcentury1800, bookdecade1890, booksu, booksubjectarcticregions
