. Fig. 92. Chosroes decoratus, a. General view, sculpturing indicated on pleon segment 3. b, c. Profile and frontal views of epistome and upper lip. d. Telson, with sculpturing indicated. rounded, post-antennal angles quadrate, hidden under 1st side-plates. Eyes large, sub- rotund. Peraeon broadly rounded in anterior portion, the posterior margins of segments 1-4 slightly thickened; segments 5-7 with medio-dorsal keel, which is largest on seg- ment 7, and on all three segments ends posteriorly in a forked tooth; postero-inferior angles of segments 5-7 becoming increasingly prominent and
. Fig. 92. Chosroes decoratus, a. General view, sculpturing indicated on pleon segment 3. b, c. Profile and frontal views of epistome and upper lip. d. Telson, with sculpturing indicated. rounded, post-antennal angles quadrate, hidden under 1st side-plates. Eyes large, sub- rotund. Peraeon broadly rounded in anterior portion, the posterior margins of segments 1-4 slightly thickened; segments 5-7 with medio-dorsal keel, which is largest on seg- ment 7, and on all three segments ends posteriorly in a forked tooth; postero-inferior angles of segments 5-7 becoming increasingly prominent and produced; posterior margins of segments 6 and 7 with a lateral tooth between the dorsal one and the postero-inferior angle. Side-plates shallow, 1 and 2 rounded, 3 subquadrate, 4 trape- zoidal, excavate behind, 5 and 6 with the anterior and posterior lobes subequal, 7 oblong. In the $ the lateral tooth on segment 6, the postero-inferior angles of seg- ments 6 and 7 and the posterior angle of side-plate 7 are shortly bifid. Pleon segments 1-3 carinate, carina forming a forked tooth on segments 1 and 2, and a simple tooth on segment 3; a lateral tooth on hind margin in segments 1 and 2; postero-inferior angle of pleon segment 1 quadrate, of segments 2 and 3 produced in a sharp point; segment 4 with a low rounded dorsal keel, which is notched below the posterior apex; segments 5 and 6 smooth. There is also a slight lateral ridge or fold on
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Keywords: ., bookcentury1900, booksubjectocean, booksubjectscientificexpediti
