File:Bulletin - United States National Museum (1967) (14782054784).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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her slender, with about 8 long setae; segment 2 with 7 or 8 setae.Maxilla 1, inner plate with 7 apical, plumose setae. MaxUla 2, innerplate with 7 long, obliquely placed, plumose setae. Maxilliped,outer plate reaching nearly to apex of 1st palpal segment. Lowerlip with small inner lobes. Gnathopod 1: propod palmar margin slighly convex, oblique,armed with a double row of 9 or 10 spine teeth; posterior angle with2 large, unequal spines on outside, 2 smaller spines on inside; posteriormargin short and without setae; lateral setae in transverse rows,singly inserted; claw of dactyl long. Gnathopod 2: propod palmarmargin less convex, less oblique, armed with a double row of 9 or 10spine teeth; posterior angle with 1 large spine on outside, 2 smallerspines on inside; posterior margin with 3 sets of setae; lateral setaesingly inserted; dactyl claw long. Coxal plates of pereopods 2 and 3with about 5 or 6 marginal setae and spinules each: that of pereopod 4 SUBTERRANEAN AMPHIPOD STYGONECTES 27
Text Appearing After Image:
Figure 3.—Stygonedes mundus, new species. Male (8.00 mm), Witheros Cave, Va.: a,bantennae 1,2; c, coxal plate of pereopod 3; d-g, pereopods 4,5,6,7; h,i, gnathopods 1,2;j, abdominal side plates; k-m, uropods 1,2,3; n, telson. 242-803—67- 28 U.S. NATIONAL MUSEUM BULLETIN 259 with about 6 marginal setae. Pereopod 6 about equal in length topereopod 7 but with more slender segments and more proximallyexpanded basis. Fifth pereopod 75 to 80 percent as long as pereopods6 and 7, distoposterior lobe more distinct. Dactyls of pereopods 5-7about 1/3 as long as corresponding propods. Median sternal, pleonitesternal and 7th coxal gills absent; bifurcate sternal gills relativelysmall. Abdominal side plates: posterior margins shghtly convex to nearlystraight, with 1 to 3 setae each; posterior corners of plates 1 and 3rather blunt and poorly developed, that of plate 2 more rounded;ventral margin of 2nd plate with 2 spines, that of 3rd plate with 4spines. Pleopod 1, inner ramus a little longer th

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