File:Bulletin - United States National Museum (1967) (14804279783).jpg

Identifier: bulletinunitedst2591967unit (find matches)
Title: Bulletin - United States National Museum
Year: 1877 (1870s)
Authors: United States National Museum Smithsonian Institution United States. Dept. of the Interior
Subjects: Science
Publisher: Washington : Smithsonian Institution Press, (etc.) for sale by the Supt. of Docs., U.S. Govt Print. Off.
Contributing Library: Smithsonian Libraries
Digitizing Sponsor: Smithsonian Libraries

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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 setae.Coxal 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 U.S. NATIONAL MUSEUM BULLETIN 2 59
Text Appearing After Image:
Figure 24.—Stygonectes russelli, new species. Male (8.40 mm), Cave X, Tex.: a,b, gnatho-pods 1,2; c, uropod 3; d, telson; e, abdominal side plates. Female (10.50 mm), ZeschRanch Cave, Tex.: f, pereopod 4; g, coxal plate of pereopod 3; h, abdominal side plates;i, uropod 2; j, telson. Female (10.50 mm), Spanish Wells Cave, Tex.: k, pereopod 7;/, uropod 3; m, telson. Female (9.00 mm), Zesch Ranch Cave: n, telson. Female(9.50 mm), Irlands Cave, Tex.: o, uropod 2. Female (9.00 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 margin.Bases 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 ofpereopod 5 about 1/3 as long as correspond

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