. Bulletin - United States National Museum. Science. Figure 260.—Lepeophtheirus edwardsi: a. Female, dorsal; b, female, fourth leg of the genital segment; the latter wider than long, with the rudiments of two pairs of legs at its posterior corners. Abdomen 1-segmented, one-third the length and width of the genital segment; fourth legs 4-segmented, with five spines and one seta, the spines with dentate flanges. Total length, mm. Remarks.—This species may be identified most easily by the struc- ture of the furca, and is quite common on the two flounders men- tioned above. Family TREBIDAE G
. Bulletin - United States National Museum. Science. Figure 260.—Lepeophtheirus edwardsi: a. Female, dorsal; b, female, fourth leg of the genital segment; the latter wider than long, with the rudiments of two pairs of legs at its posterior corners. Abdomen 1-segmented, one-third the length and width of the genital segment; fourth legs 4-segmented, with five spines and one seta, the spines with dentate flanges. Total length, mm. Remarks.—This species may be identified most easily by the struc- ture of the furca, and is quite common on the two flounders men- tioned above. Family TREBIDAE Genus TREBIUS Kr0yer, 1838 Head fused with first and second thoracic segments, third and fourth segments free and without dorsal plates; carapace strongly arched dorsally; no lunules; genital segment well developed, without lobes. Abdomen narrow and elongate, 1- to 3-segmented; all four pairs of legs biramose, rami of first pair 2-segmented, of other three pairs 3-segmented, fourth endopod sometimes 2-segmented; tw^o pairs of leg rudiments on genital segment in male, one pair in female; maxillary hook and furca both present as in the Caligidae; maxillae simple or bipartite. 71937—32 28. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original United States National Museum; Smithsonian Institution; United States. Dept. of the Interior. Washington : Smithsonian Institution Press, [etc. ]; for sale by the Supt. of Docs. , U. S. Govt Print. Off.
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Keywords: ., bookauthorun, bookcentury1800, bookdecade1870, booksubjectscience
