. The Danish Ingolf-Expedition. Scientific expeditions; Arctic Ocean. COPEPODA 1,1 36. Euchirella bitumida n. sp. (PI. V figs 9aâg; PI. VIII figs 4aâe; text-fig. 34.) Description, f?. Size of specimen from Thor St. 82 6-6 mm.; anterior division 5-4; nrosome 1-2. Another specimen measured about 7 ram. The head is produced into a prominent rounded hehnet-shaped crista (PI. VIII fig. 4 a), like that of E. galeata, which is well marked off behind, and not continued into a dorsal keel; below the crest the margin falls steeply towards the prominent but rather short rostrum. The body is rather slende
. The Danish Ingolf-Expedition. Scientific expeditions; Arctic Ocean. COPEPODA 1,1 36. Euchirella bitumida n. sp. (PI. V figs 9aâg; PI. VIII figs 4aâe; text-fig. 34.) Description, f?. Size of specimen from Thor St. 82 6-6 mm.; anterior division 5-4; nrosome 1-2. Another specimen measured about 7 ram. The head is produced into a prominent rounded hehnet-shaped crista (PI. VIII fig. 4 a), like that of E. galeata, which is well marked off behind, and not continued into a dorsal keel; below the crest the margin falls steeply towards the prominent but rather short rostrum. The body is rather slender, with the head and the first thoracic tergites coalesced; the fifth tergite is not distinctly marked out, and the lateral corners are rounded (figs gaâb). The anterior division is 4-5 as long as the abdomen. The genital somite has in dorsal view a better marked convexity on the right than on the left side, and possesses, slightly in front of middle on each side, a rounded protuberance, bigger on the right side and with a shallow impression between tlie two; the genital somite is in lateral view rather cha- racteristic, partly on account of the ventral outline which is suddenly produced in front and falls rather smoothly behind; in ventral view it appears rather simple (fig. 9 c). The caudal rami are about as long as wide; the terminal setae, which are somewhat longer than the interior one, are of almost equal length and a little shorter than the abdomen. The antennulae, which almost extend to the end of the abdomen, have the appendages completely like those of E. messinensis^ and the measurements almost alike, except segment 17, which is the longest segment, a little longer than segment 19. The antennae (PI. VIII fig. 4a) have the endopodite one third as long as the exopodite; the endopodite has 6 setae of equal length in the Le and 6 in the Li, of which the two inner are rather short. The 7naxillulae differ from those of E. niessinetisis by the ^ ^ ,â ^ Text-fig. 34. rel
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectscienti, bookyear1915
