. Fig. 24. S. robustus. Mastigopus telson. a, stage i; b, stage 2; c, stage 4 ? 11 mm. moulted from form like e\ d, stage 5 ? 12 mm.; e, stage 3, 6 mm.; /, stage 4, 10 mm.; g, h, moult and post-moult, 18 mm.; i, moult to stage 4 (/). Sergestes prehensilis Bate Syn. S. gloriosus Stebbing (Gordon, 1935, J. Linn. Soc. xxxix, p. 314.) lilig, 1927, fig. 125, Acanthosoma 2. Material. Discovery Station 282 (i°ii'S,5°38'E). One specimen of Acanthosoma 2. Description. Acanthosoma 2 (Fig. 25 a-c). Length 3-61 mm. Rostrum 1-42 mm. Carapace a little longer than wide. Supraorbital spine shorter than eye; f
. Fig. 24. S. robustus. Mastigopus telson. a, stage i; b, stage 2; c, stage 4 ? 11 mm. moulted from form like e\ d, stage 5 ? 12 mm.; e, stage 3, 6 mm.; /, stage 4, 10 mm.; g, h, moult and post-moult, 18 mm.; i, moult to stage 4 (/). Sergestes prehensilis Bate Syn. S. gloriosus Stebbing (Gordon, 1935, J. Linn. Soc. xxxix, p. 314.) lilig, 1927, fig. 125, Acanthosoma 2. Material. Discovery Station 282 (i°ii'S,5°38'E). One specimen of Acanthosoma 2. Description. Acanthosoma 2 (Fig. 25 a-c). Length 3-61 mm. Rostrum 1-42 mm. Carapace a little longer than wide. Supraorbital spine shorter than eye; four pairs of marginal spines, of which the third is the longest; dorsal spine present. Dorsal organ small. Abdomen with dorsal spines on all somites, those of somites i and 2 not markedly smaller than the rest. Lateral spines very long, that of somite 5 as long as somite 6. Telson more than 2^ times as long as wide, with arms of distal fork slender, slightly divergent, with three inner and two outer spines. Lateral spines of telson far in front of fork. Eye less than one-sixth length of body; eyeball nearly round, its diameter about one- third length of eye. Papilla present on stalk. Antennal scale slender, with long apical spine; flagellum twice as long as scale. Mandible with very small rudiment of palp.
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Keywords: ., bookcentury1900, booksubjectocean, booksubjectscientificexpediti
