. Bulletin - United States National Museum. spines on outside, 3 to 6 small spines on inside; posterior marginwith 2 to 4 (usually 3) sets of setae; superior lateral setae in transverserow, singly inserted, inferior lateral setae not in transverse row,singly inserted; dactyl claw rather long. Gnathopod 2: propodpalmar margin straight, armed with a double row of 7 or 8 small spineteeth; posterior angle with 1 large spine and 3 to 6 smaller spines andseveral setae on outside, 3 to 6 small spines on inside; posterior marginwith 4 to 7 sets of setae; superior lateral setae in transverse row, tripl
. Bulletin - United States National Museum. spines on outside, 3 to 6 small spines on inside; posterior marginwith 2 to 4 (usually 3) sets of setae; superior lateral setae in transverserow, singly inserted, inferior lateral setae not in transverse row,singly inserted; dactyl claw rather long. Gnathopod 2: propodpalmar margin straight, armed with a double row of 7 or 8 small spineteeth; posterior angle with 1 large spine and 3 to 6 smaller spines andseveral setae on outside, 3 to 6 small spines on inside; posterior marginwith 4 to 7 sets of setae; superior lateral setae in transverse row, triplyand doubly inserted; inferior lateral setae singly inserted; dactyl clawrather long. Coxal plates of pereopods 2 and 3 varying from justslightly longer than broad up to 25 percent longer than broad; plate 2with about 6 marginal setae; that of 3 with 8 or 9 marginal plate of pereopod 4 varying from about as long as broad up to25 percent longer than broad, ventral margin with 8 to 10 setae. 98 NATIONAL MUSEUM BULLETIN 2 59. Figure 24.—Stygonectes russelli, new species. Male ( mm), Cave X, Tex.: a,b, gnatho-pods 1,2; c, uropod 3; d, telson; e, abdominal side plates. Female ( mm), ZeschRanch Cave, Tex.: f, pereopod 4; g, coxal plate of pereopod 3; h, abdominal side plates;i, uropod 2; j, telson. Female ( mm), Spanish Wells Cave, Tex.: k, pereopod 7;/, uropod 3; m, telson. Female ( mm), Zesch Ranch Cave: n, telson. Female( mm), Irlands Cave, Tex.: o, uropod 2. Female ( mm), Stowers Cave, Tex.:p, telson. SUBTERRANEAN AMPHIPOD STYGONECTES 99 Pereopod 7 between 40 and 55 percent as long as body, a little longerthan pereopod 6 and about 30 percent longer than pereopod 5; seg-ment 6 with 3 or 4 (occasionally 2) sets of spines on posterior of pereopods 5-7: posterior margins of 5 and 6 nearly straight,that of 7 convex; distoposterior lobes rather broad. Dactyls ofpereopods 6 and 7 about 1/4 as long as corresponding propods, that o
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Keywords: ., bookauthorun, bookcentury1800, bookdecade1870, booksubjectscience
