. Copepoda. Calanoida; Copepoda. COPEPODA 8l Remarks. In spite of the small differences enumerated in the description, I do not doubt that this species is identical with that described by Sars from Norway, and with that which Wo If end en has described under the name of Pseudactidius from the Fceroe channel. According to my investigations the size of the specimens varied from 3-6 to 4-4 mm., the biggest being those from northern regions; Farran's (1905) specimens measured 3-3—3*5 mm., and even 2*65; these small specimens possibly belong to another species. 17. Chiridius nasutus n. sp. (PL II f
. Copepoda. Calanoida; Copepoda. COPEPODA 8l Remarks. In spite of the small differences enumerated in the description, I do not doubt that this species is identical with that described by Sars from Norway, and with that which Wo If end en has described under the name of Pseudactidius from the Fceroe channel. According to my investigations the size of the specimens varied from 3-6 to 4-4 mm., the biggest being those from northern regions; Farran's (1905) specimens measured 3-3—3*5 mm., and even 2*65; these small specimens possibly belong to another species. 17. Chiridius nasutus n. sp. (PL II fig. 4 a; text-figs 18a*— e). 1905. pars? Chiridius armatus Boeck. Farran. Description. i% Size: Specimen from St. 167 2"88 mm.; anterior division 2*19 mm.; urosome 0-69. The shape of the body is in the main like that of the preceding species, but somewhat more slender (text-fig. 18 a). The insertion of the antennulae is apparently better removed from the tip and the rostral spines, which are somewhat longer b c and basally swollen, and directed more forwards (text-figs 18 b—c). The anterior division is just three times as long as the abdomen. The genital somite (text-fig. 18 d), which has a receptaculum seminis like that of Ch. armatus, is about 1-5 as long as the third and 17 as long as the fourth somite; the furcal rami are 17 as long as wide and 17 as long as the anal somite; the last segment is about half as long as the third one. The antennulae, which extend some- what beyond the end of cephalothorax, but scarcely to the end of the abdominal somite, have the segments 24 and 25 well defined; the measurements differ only in minor details, as the segment 20 is a little longer Text-fig. 18. Ch. nasutus n. sp. than 8~o, as the segment 18 is a little longer than a" Head |n dorsal view x 16. b. Rostrum from below X 150. J' => c. Head in lateral view X 60. d. Genital somite etc. X 60. 21, and as the segment 23 is scarcely I*i as long as e. Pes IV dext. in anteri
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Keywords: ., bookauthorhansenhj, bookcentury1900, bookdecade1910, bookyear1915
