. Fig. 45. Urothoides oniscoides, a. Dorsal view of head, with side-plate 1 in perspective, b. Portion of integument highly magnified, c. Pleon segment 3. d. Gnathopod 1. e. Side-plate 3. /. Side-plate 4 and peraeopod 2. g. Peraeopod 3. /;. Peraeopod 4. i. Peraeopod 5. concave. Pleon segment 2 with postero-inferior angle rounded-quadrate, lower margin setose; pleon segment 3 with postero-inferior angle produced in a strong acute point. Segments 4 and 5 short, indistinctly separated. Telson as in lachneessa Stebb. Antenna 1, flagellum 5-jointed, accessory flagellum 3-jointed. Antenna 2, f
. Fig. 45. Urothoides oniscoides, a. Dorsal view of head, with side-plate 1 in perspective, b. Portion of integument highly magnified, c. Pleon segment 3. d. Gnathopod 1. e. Side-plate 3. /. Side-plate 4 and peraeopod 2. g. Peraeopod 3. /;. Peraeopod 4. i. Peraeopod 5. concave. Pleon segment 2 with postero-inferior angle rounded-quadrate, lower margin setose; pleon segment 3 with postero-inferior angle produced in a strong acute point. Segments 4 and 5 short, indistinctly separated. Telson as in lachneessa Stebb. Antenna 1, flagellum 5-jointed, accessory flagellum 3-jointed. Antenna 2, flagellum 5-jointed. Mouth-parts as in lachneessa; mandibular palp rather longer. Gnathopods 1 and 2, and peraeopods 1 and 2 as in lachneessa, but peraeopods 1 and 2 rather more slender. Peraeopod 3 as in lachneessa, but 4th and 5th joints not quite so stout. Peraeopod 4, 2nd joint oval, hind margin not concave, rest of limb much longer proportionately, and 4th and 5th joints not more expanded than in Urothoe. Peraeopod 5, 2nd joint subcircular, not produced downwards beyond 3rd joint, hind margin serrate with sharp points, rest of limb much longer proportionately than in lachneessa. Uropods 1-3 as in lachneessa.
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Photo credit: © The Bookworm Collection / Alamy / Afripics
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Keywords: ., bookcentury1900, booksubjectocean, booksubjectscientificexpediti
