. The Danish Ingolf-Expedition. Scientific expeditions; Arctic Ocean. COPEPODA 95 Description. f$. Size of specimen from Thor St. 183 4-05 mm.; anterior division 3-13 mm., iirosome 0-92 mm. Sars' specimens measured 4-8 mm., Wolfeiiden's specimens 4-65 mm. and Far- ran's specimens measured 3'9—4*5. The shape of the body is practically as figured by Sars, except for the distinctly longer lateral spines of the thorax, which are directed downwards and backwards. The rostrum is not undivided as stated by Sars, but is, as shown in fig. 7 a (PI. 11), distinctly bifurcate terminally. On each side of t
. The Danish Ingolf-Expedition. Scientific expeditions; Arctic Ocean. COPEPODA 95 Description. f$. Size of specimen from Thor St. 183 4-05 mm.; anterior division 3-13 mm., iirosome 0-92 mm. Sars' specimens measured 4-8 mm., Wolfeiiden's specimens 4-65 mm. and Far- ran's specimens measured 3'9—4*5. The shape of the body is practically as figured by Sars, except for the distinctly longer lateral spines of the thorax, which are directed downwards and backwards. The rostrum is not undivided as stated by Sars, but is, as shown in fig. 7 a (PI. 11), distinctly bifurcate terminally. On each side of the vulva a somewhat triangular plate was found, and a short receptaculum seminis was observed (fig. 7 b); the structure of the genital apparatus was rather complicated, but was not examined in the details; figs 7 b—c will give an impres- sion of its structure. The furcal rami are 1-4 as long as wide, and a little shorter than the anal somite. The antennulac do not reach to the end of the anal somite, but only somewhat beyond the end of the geni- tal somite. The segment 2 is 11 as long as 8059, which is scarcely I'l as long as segment 13, and i-2 shorter than segment 20; segment 19 is a little longer than 20 and 22 which are of almost equal length, and longer than segment 2. The appendages differ from those of G. tcnuupinus by the presence of a Sp. in segment 13. The antouiac have the Re about I'S as long as Ri, but are scarcelv ^ ^-• . n j- >. >* «,,„ •J " ' - Text-fig. 24. Giiiaiiis brevispimis O. O. oars. different in other respects. The maxil- a. f9. Head from the left with parasite attached to uiasilla X 18. b. f9. Pes I sin. in ant. view X 80. c. Pes II sin. Ri in ant. view X 80. d. fd". hdae differ from those of G. temiispimts Rostrum x 57. e. id- Abdomen x 33- f- fd". X 9- g- Y9. (StageV) X 33. by Ivi 3, which only bears 4 setae in h. Y9. Abdomen lateral view X 33- i- yP- Pes II Ri in ant. view X 80. addition to the sensory lobe, and by
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectscienti, bookyear1915
