. The Danish Ingolf-Expedition. Scientific expeditions; Arctic Ocean. COPEPODA 125 The abdomen, which is -^ as long as the anterior division, has the furcal rami about as long as the fourth somite, and about as long as wide. The genital somite, which is as deep as wide, is somewhat wider than long; in dorsal view it is distinctly asymmetrical and more convex on the left than on the right side; on the left side, near the hinder margin, we observe a lamellous process with broad base, and directed backwards and somewhat outwards; behind this, as seen in fig. 4a, another less prominent elevation w
. The Danish Ingolf-Expedition. Scientific expeditions; Arctic Ocean. COPEPODA 125 The abdomen, which is -^ as long as the anterior division, has the furcal rami about as long as the fourth somite, and about as long as wide. The genital somite, which is as deep as wide, is somewhat wider than long; in dorsal view it is distinctly asymmetrical and more convex on the left than on the right side; on the left side, near the hinder margin, we observe a lamellous process with broad base, and directed backwards and somewhat outwards; behind this, as seen in fig. 4a, another less prominent elevation was observed. The genital area is well produced in front, and the median prominent crista, which is prominent in Giesbrecht's fig. 21 (Taf. 36) oi E. venusta, was not seen. The triangular teeth along the hinder margin of abdominal somites 10^2, 3 and 4 are only poorly developed. The antennulae reach the end of the body, their appendages are scarcely different from those of E. messhiciisis, and the measurements are very much alike. The endopodite of the antennae is about half as long as the exopodite, and its second segment has 9 setae in Li and 9 in Le. The Re I, which has a well developed conical process without any seta, is fairly well separated from Re 2 (PI. VIII fig. 3). The Diaxillulae differ from those of Euc. viessinensis by the presence of a less powerfuU Sa in Ri I. The viaxillac have the outer margin rather suddenly produced as in E. rostrafa, but are in other respects scarcely different from E. viessinensis^ the maxillipeds differ from those of the latter species by the almost straight exterior margin of the third basipodite. The glandular pore in the outer margin of Re III of pes I is more removed from base, in other respects the first pair of legs is like E. vies- sinensis. The Se of Ri I of pes II is more prominent than in E. viessine?isis (cf. text-fig. 31a); the ac- cessory tooth of the Se Ri I is indistinct in pes III, and completely wanting in pes IV. As in E.
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectscienti, bookyear1915
