. Discovery reports. Discovery (Ship); Scientific expeditions; Ocean; Antarctica; Falkland Islands. 50 DISCOVERY REPORTS Mastigopus ca. 5 mm. More than five times length of body. The kink in hfe is so situated that the flagellum is first directed backwards and then bent sharply at an acute angle. It can, however, be straightened out and held at angles to the body so that the kink hardly shows. Mastigopus ca. 6 mm. (Fig. 41). Flagellum about six times as long as body. In the figure the kink is not Fig. 41. S. pcctiiiatus. a, Mastigopus, 6 mm.; b, setae on flagellum. Sergestes sargassi
. Discovery reports. Discovery (Ship); Scientific expeditions; Ocean; Antarctica; Falkland Islands. 50 DISCOVERY REPORTS Mastigopus ca. 5 mm. More than five times length of body. The kink in hfe is so situated that the flagellum is first directed backwards and then bent sharply at an acute angle. It can, however, be straightened out and held at angles to the body so that the kink hardly shows. Mastigopus ca. 6 mm. (Fig. 41). Flagellum about six times as long as body. In the figure the kink is not Fig. 41. S. pcctiiiatus. a, Mastigopus, 6 mm.; b, setae on flagellum. Sergestes sargassi Ortm. Hansen Hansen, 1922, p. 154, Mastigopus. Illig, 1927, p. 330, S. nudus, Mastigopus (?), fig. 103. Cecchini, 1928Z), p. 38, Mastigopus (?). Ortmann (1893, p. 69) mentions an Acanthosoma which he thought was that of S. sargassi, but without figure or adequate description. Material. We have no larvae which can with certainty be referred to this species, and the Mastigopus is rare at Bermuda. The Acanthosoma described below, of which one specimen was taken in 1935 and one in 1938 at Bermuda, cannot be proved to belong to S. sargassi, but there is no other species to which it can be attached. Its colour and general resemblance to S. pectinatiis support the identification. Description. Acanthosoma 2 (Figs. 42, 43). Length 3-0 mm. Rostrum 0-96 mm. Rostrum denticulate, longer than antennule, with long basal spine. Carapace as wide as long. Supraorbital spines denticulate, longer than eye; anterior lateral spines long and stout, with several long basal spinules; posterior lateral spines with long basal spinules. Hepatic spines long, slender, denticulate. Posterior dorsal spine very long, with spinules. Dorsal organ 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 (Gre
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