. Discovery reports. Discovery (Ship); Scientific expeditions; Ocean; Antarctica; Falkland Islands. 34 DISCOVERY REPORTS S. robustus Form A Discovery Stations 99, 100, 102, 276, 715. Stage I. Length 4-45 mm. Rostrum 1-55 mm. General form as in S. robustus, but carapace with three pairs of marginal spines. Telson with lateral spines in front of fork. Arms of telson with a series of five or six spines on the inner margin. Eye apparently without papilla. Setose margin of uropod about ih times as long as bare part. /. Fig. 26. 5'. robustus A. a, Acanthosoma 2; b, S. robustus B. Acanthosoma i. Stag
. Discovery reports. Discovery (Ship); Scientific expeditions; Ocean; Antarctica; Falkland Islands. 34 DISCOVERY REPORTS S. robustus Form A Discovery Stations 99, 100, 102, 276, 715. Stage I. Length 4-45 mm. Rostrum 1-55 mm. General form as in S. robustus, but carapace with three pairs of marginal spines. Telson with lateral spines in front of fork. Arms of telson with a series of five or six spines on the inner margin. Eye apparently without papilla. Setose margin of uropod about ih times as long as bare part. /. Fig. 26. 5'. robustus A. a, Acanthosoma 2; b, S. robustus B. Acanthosoma i. Stage 2 (Fig. 26 a). Length 5-9 mm. Rostrum 175 mm. Pleopods with small rudiment of endopod on 2-5. Setose part of uropod about equal to bare part. Mastigopus. The Mastigopus is scarcely distinguishable from S. robushis. The telson is shown in Fig. 27. S. robustus Form B Discovery Stations 708, 711. Acanthosoma i (Fig. 26 b). Length 3-2 mm. Rostrum 1-2 mm. Basal spine of rostrum minute. Carapace a little longer than wide (3-6: 3-0) with two pairs of lateral spines, of which the posterior one is a mere point. Supraorbital and posterior dorsal spines very short. Lateral spines of somites 1-3 very much shorter. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Institute of Oceanographic Sciences (Great Britain); National Institute of Oceanography of Great Britain; Great Britain. Colonial Office. Discovery Committee. London ; New York : Cambridge University Press
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