. Bulletin - United States National Museum. Science. ISOPODS OF NORTH AMERICA. 245 each being 2 mm. lono-. The fourth uiid tit'th are .su})equal, each being 1 mm. in UMigth. Tiie sixth and scxcntii are each only ^ mm. long. The epimiM'a are not distinctly separated on th(» tirst segment. The following tive segments ha\'e distinct epimera. There are none on the seventh segment, and there are no appendages to this segment. There are two paii-s of legs attached to the fourth segment, two legs on either side, and two pairs of epimera. The epimera of the second and third segments are narrow plates,
. Bulletin - United States National Museum. Science. ISOPODS OF NORTH AMERICA. 245 each being 2 mm. lono-. The fourth uiid tit'th are .su})equal, each being 1 mm. in UMigth. Tiie sixth and scxcntii are each only ^ mm. long. The epimiM'a are not distinctly separated on th(» tirst segment. The following tive segments ha\'e distinct epimera. There are none on the seventh segment, and there are no appendages to this segment. There are two paii-s of legs attached to the fourth segment, two legs on either side, and two pairs of epimera. The epimera of the second and third segments are narrow plates, extending the full length of the lateral margin on the shortened side of the body, the epimera of the third segment on the longer side not extending quite to the post-lateral angle. The fourth segment has two pairs of epimera, an anterior and a posterior pair; the two are equal in size on the short side, the ante- rior one on the long side of the bod}- being small, the posterior one being transversely elongated, not laterally placed, })ut extending along the posterior margin of the lateral expansion of the segment. The epimera of the tifth and sixth segments, on the short side of the body, occupy the post-lateral angles; those of the long side are transversely. 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
