. Bulletin - United States National Museum. Science. ISOPODS OF NORTH AMERICA. 255 clos of the tirst pair of anteunio are widely separated, heino- neai-ly 2 mm. apart. The maxillipeds have a palp of two articles. The palp of the mandibles is composed of three artick's. The first seg-meut of the thorax is about twice as long- as any of the three following segments, which are subecpial. The antcro-hiteral expansions of the first segment are half as wide as the head, 3 mm. in width, and the}'^ are widely rounded at the anterior extremity. The fifth and sixth segments are half as wide in tiu^ medi
. Bulletin - United States National Museum. Science. ISOPODS OF NORTH AMERICA. 255 clos of the tirst pair of anteunio are widely separated, heino- neai-ly 2 mm. apart. The maxillipeds have a palp of two articles. The palp of the mandibles is composed of three artick's. The first seg-meut of the thorax is about twice as long- as any of the three following segments, which are subecpial. The antcro-hiteral expansions of the first segment are half as wide as the head, 3 mm. in width, and the}'^ are widely rounded at the anterior extremity. The fifth and sixth segments are half as wide in tiu^ median longitudinal line as any of the three preceding segments. Tlu^ seventh segment is a little shorter than the sixth. The epimera are distinctly separated. Fig. 263.—Cymothoa (istritm (After Schicedte and Meinert). a, Young of the second stage (ENLARGED), b, VOlTXc; OF THE FIRST STAGE (ENLARGED). C, LATERAL VIEW OF THORAX OF ADULT FEMALE (REDUCED), (l, .\DULT MALE (ENLARGED), r, ADULT FEMALE (REDI'CED). /, .VDULT (REDUCED). on all the segments with the exception of the first. They are narrow plates, extending- or nearl}' extending the full length of the segments. Those of the second segment are a little broader anteriorly than are the others. The abdomen is deeply set in the thorax. All the segments are dis- tinct, the lateral parts of the first two being covered by the seventh thoracic segment, so that these segments appear abruptly narrower than the thorax. The following segments gradually increase in width. The sixth or terminal segment is twice as broad as long. ?> nuu.: 1^. 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
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