. Bulletin - United States National Museum. Science. Fig. 730.—Trichoniscus p.\pillicornis. Uropoda and last segment ok abdo- men. X 77. stiff hairs or bristles; the fifth joint is also produced at the outer distal angle in an acute process. The tiagelluni is composed of about seven articles, rather indis- tinctly detined; the last article is tipped with a bunch of hairs. The buccal mass is very prominent below. The segments of the thorax are about equal in length. The post- lateral angles of all the segments, except the first, are produced backw^ard, very slightly in the case of the second, t
. Bulletin - United States National Museum. Science. Fig. 730.—Trichoniscus p.\pillicornis. Uropoda and last segment ok abdo- men. X 77. stiff hairs or bristles; the fifth joint is also produced at the outer distal angle in an acute process. The tiagelluni is composed of about seven articles, rather indis- tinctly detined; the last article is tipped with a bunch of hairs. The buccal mass is very prominent below. The segments of the thorax are about equal in length. The post- lateral angles of all the segments, except the first, are produced backw^ard, very slightly in the case of the second, third, and fourth, ])ut becoming gradually more so, until the last two segments show this character very nlarkedl3^ The abdomen is narrower than the thorax. All the segments are visible in entirety, not being covered laterally ])y the last thoracic segment. The terminal segment is triangularly produced, with the apex some- what rounded. The uropoda are short, styliform; the outer branch is the stouter, and ex- tends a little beyond the ex- tremity of the inner branch. Both branches are tipped with a few hairs. Only a single specimen was obtained by the Harriman Alaska Expedition. It was found on tht beach at Seldovia, Cook Inlet. The type is in the , Cat. No. 28TT2. Fig. 735.—Trichonis cus papillicornis X 15. Fig. pa- piLLicoRNis. Leg of first PAIR. X Fig. —Tricho- niscus CORNIS. Uropod OF left side. X 77. 127. Genus HAPLOPHTHALMUS Sch6bl.« Body oblong, somewhat convex, sculptured dorsally with longitudi- nal riV)s. Head triangularly produced in the middle; lateral lobes large; front scarcely defined from the epistome. Eyes small, simple, dorsally situ- ated. Second pair of antennte short, nearly equal to one-third the length of the body. Palp of maxillipeds obscurely composed • of five articles; epignath simple, lanceolate. «See Sara for characters of genus, Crnst. of Norway, II, 1899, pp. 166-167, and Budde-Lund, Crust.
Size: 1118px × 2236px
Photo credit: © Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauthorun, bookcentury1800, bookdecade1870, booksubjectscience
