. Fig. 55. S. armatus. Mastigopus, 12 mm. Sergestes edwardsi Kroyer Hansen, 1922, p. 185, Mastigopus. Illig, 1927, p. 324, Mastigopus and Acanthosoma 2. Material. This species was not taken at Bermuda. The following descriptions are from specimens taken at Discovery Stations 701, 702, 703, 704, 705, 706, 708, from 14° 39' N, 25° 57' W to 10° 26' S, 34° 57' W. Description. Elaphocaris (Fig. 56 a, b). An Elaphocaris in stage 2 taken at Station 704 probably belongs to this species. It very closely resembles S. vigilax. Length i -00 mm. Rostrum broken. Rostrum with two median ventral and four pair


. Fig. 55. S. armatus. Mastigopus, 12 mm. Sergestes edwardsi Kroyer Hansen, 1922, p. 185, Mastigopus. Illig, 1927, p. 324, Mastigopus and Acanthosoma 2. Material. This species was not taken at Bermuda. The following descriptions are from specimens taken at Discovery Stations 701, 702, 703, 704, 705, 706, 708, from 14° 39' N, 25° 57' W to 10° 26' S, 34° 57' W. Description. Elaphocaris (Fig. 56 a, b). An Elaphocaris in stage 2 taken at Station 704 probably belongs to this species. It very closely resembles S. vigilax. Length i -00 mm. Rostrum broken. Rostrum with two median ventral and four pairs of lateral spines at base. Lateral process with ten spines including the main terminal spine. Posterior process with two pairs of lateral spines. Telson arms about twice as long as wide. Dorsal organ rather large. Eye short, the greatest width nearly equal to the length, without papilla. Labral spine not very long. Acanthosoma i (Fig. 56 d-f). Length 2-o-2-4i mm. Rostrum 075-0-85 mm. Rostrum shorter than antennule. Supraorbital spine longer than eye. Two lateral spines large, with small spinules. Posterior dorsal spine very long, bent forwards and


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