. The Danish Ingolf-expedition. Marine animals -- Arctic regions; Scientific expeditions; Arctic regions. 82 COPEPODA was found in the three segments of the exopodites in the three last pair of legs, but in the position of the jDores, especially in Re I—II, it is most like Ch. arviahis^ as these are placed on the anterior surface, well removed from the lateral margin. Occurrence. This species was taken by the S/S Thor at the following 3 stations viz: "/? 1904. vSt. 183. 6i°3o L. N. i7''o8 L. W. Yt. 1800 M. Wire i f?. 8/6 1905. St. 72. 57°52 L. N. 9°53 L. W. Yt. 1500 M. Wire 2 f ?. Vg 1905
. The Danish Ingolf-expedition. Marine animals -- Arctic regions; Scientific expeditions; Arctic regions. 82 COPEPODA was found in the three segments of the exopodites in the three last pair of legs, but in the position of the jDores, especially in Re I—II, it is most like Ch. arviahis^ as these are placed on the anterior surface, well removed from the lateral margin. Occurrence. This species was taken by the S/S Thor at the following 3 stations viz: "/? 1904. vSt. 183. 6i°3o L. N. i7''o8 L. W. Yt. 1800 M. Wire i f?. 8/6 1905. St. 72. 57°52 L. N. 9°53 L. W. Yt. 1500 M. Wire 2 f ?. Vg 1905. vSt. 167. 57°46 L. N. 9°55 Iv. W. Yt. 1500 M. Wire 2 f?. Remarks. This species, which on account of its small size, the prominent rostrum, and the curious arrangement of the secretory pores is well distinguished from Ch. armahis, is certainly new to science, as in the literature I have only found a single reference to a species of the Ch. armatus type of a size of xd^ mm. (viz. Farran 1905 p. 34). iff' v_ 18. Chiridius modestus n. sp. (I'l. II fig. 5; text-figs 19a—c). Description. f$. Size: Specimen from St. 183 measured 3-69 nnn.; anterior division 270 nun., urosome 0-99. The rostral spines are longer and more prominent tiian in 67/. armatus. but less so than in iiasutus (text-fig. 19 b). The outline of the head is anteriorly not fairly rounded as in Ch. armatus. but distinctly produced (text-fig. 19a). The frontal organ is prominent, and the distance between it and the base of the rostrum is .short / and straight, not slightly concave as in the two other species. The cephalothorax, which is 2*5 times as long as wide, is scarcely 3 times as long as the urosome. The genital somite, which has a receptaculum seminis of the usual structure, is about 1-3 times as long as the third somite, and 17 as long as the fourth (text-fig. 19 c); the furcal rami are i-6 as long as wide, and 1-4 as long as the aual somite, which is a little longer than the furca; the latter .somite
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Keywords: ., bookcentury1800, bookdecade1890, booksu, booksubjectarcticregions
