Discovery reports (1937) Discovery reports discoveryreports14inst Year: 1937 20 DISCOVERY REPORTS Table V. Occurrence of Second Nauplius Station Date Depth m. Number Length mm. Remarks 54° 546 558 WS480 WS 483 WS484 WS486 19. xii. 30 20. xii. 30 29. xii. 30 16. xi. 29 21. xi. 29 21. xi. 29 21. xi. 29 250-100 250-100 200-100 500-200 500-250 750-500 500-250 I I I I I I I 070 0-68 0-65 0-65 0-63 0-66 0-69 Female with enlarged ovaries in net A damaged specimen The outline of the body in dorsal aspect is roughly oval (Fig. zb), truncated at the posterior end and tending to be pointed, rather than
Discovery reports (1937) Discovery reports discoveryreports14inst Year: 1937 20 DISCOVERY REPORTS Table V. Occurrence of Second Nauplius Station Date Depth m. Number Length mm. Remarks 54° 546 558 WS480 WS 483 WS484 WS486 19. xii. 30 20. xii. 30 29. xii. 30 16. xi. 29 21. xi. 29 21. xi. 29 21. xi. 29 250-100 250-100 200-100 500-200 500-250 750-500 500-250 I I I I I I I 070 0-68 0-65 0-65 0-63 0-66 0-69 Female with enlarged ovaries in net A damaged specimen The outline of the body in dorsal aspect is roughly oval (Fig. zb), truncated at the posterior end and tending to be pointed, rather than rounded, at the anterior end. At each postero-lateral corner of the body there are two spines, a longer inner one about one-quarter to one-third of the length of the body, and a shorter outer one about one- tenth of the length of the first-mentioned spine. Three pairs of appendages are de- veloped (Fig. za). The antennules are uniramous with two terminal setae; the antennae Fig. 2. Second Nauplius ( x 46). a, lateral aspect; b, dorsal aspect. are biramous, having six terminal setae on the inner ramus and three terminal and one lateral on the outer. Posterior to the antennae are the biramous mandibles, each ramus having three setae distally. METANAUPLIUS In appearance the Metanauplius is very robust and of great size in comparison with other euphausian Metanauplii found in the same region. The average lengths of the larvae from different stations are given in Table VI. A hundred Metanauplii from St. 647, 750-500 and 1000-750 m. respectively, were measured and give normal length
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