Archive image from page 178 of Discovery reports (1932) Discovery reports discoveryreports05inst Year: 1932 PLEUSTIDAE 169 1-3 carinate, the carina on segments 1 and 2 raised posteriorly into a strong pointed tooth, on segment 3 rounded. Postero-inferior angle of segment 3 shortly pointed. Telson boat-shaped, apex slightly incised, a small subterminal notch on lateral margin. Both antennae elongate, slender, flagella multiarticulate. Mouth-parts as in S. malmgreni (Sars, 1895, pi. cxxv, fig. 1), except that the mandible has a rather feeble conical molar, minutely setulose at apex; cutting ed
Archive image from page 178 of Discovery reports (1932) Discovery reports discoveryreports05inst Year: 1932 PLEUSTIDAE 169 1-3 carinate, the carina on segments 1 and 2 raised posteriorly into a strong pointed tooth, on segment 3 rounded. Postero-inferior angle of segment 3 shortly pointed. Telson boat-shaped, apex slightly incised, a small subterminal notch on lateral margin. Both antennae elongate, slender, flagella multiarticulate. Mouth-parts as in S. malmgreni (Sars, 1895, pi. cxxv, fig. 1), except that the mandible has a rather feeble conical molar, minutely setulose at apex; cutting edge with about 10 teeth, secondary cutting plate in left mandible with about eight teeth, in right mandible bidentate. Gnathopods 1 and 2, 2nd joint shallowly channelled in front, outer margin slightly lobed at distal end, 4th with a short sharp spine at lower distal angle, 5th and 6th sub- equal, rather elongate, both setose along lower margins, 5th with two rather stronger spine-setae distally, 6th cylindrical, palm oblique, not defined except by three stout submarginal spines, finger overlapping palm. Fig. 102. Austropleustes cuspidatus, Brnrd. a. Gnathopod 1. b. Peraeon segments 6 and 7, and pleon seg- ments 1-4. c, d. Dorsal and lateral views of telson. e. Dorsal view of uropod 3 (inner ramus missing). Peraeopods 1 and 2, 5th and 6th joints rather strongly spinose on hind margin, dactyls with a small denticle at base of unguis. Peraeopods 3-5, 2nd joint ovately ex- panded, hind margin shallowly notched, 5th and 6th joints rather strongly spinose on anterior margins, dactyls with denticle as in peraeopods 1 and 2. Uropods 1 and 2, peduncle longer than rami in uropod 1, shorter than the rami in uropod 2. Uropod 3, peduncle with upper margin keeled and ending in a short tooth, produced below into a channelled process for the reception of the inner ramus, which is lost in both specimens, but is presumably elongate. Remarks. Distinguished from all other Pleustids by the dorsa
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