. Bulletin - United States National Museum. Science. A REVIEW OF THE MYSIDACEA 95 Male pleopods very distinctive, especially those of the second and third pairs; the endopod of all the pleopods of the male is composed of a single short joint; the exopod of the first pair (fig. 27, a) is much longer than the endopod and is composed of four joints; in the second pair (fig. 27, b) the sympod is very long and stout, iy2 times as long as the exopod, the endopod is single jointed and furnished with 8 or 9 delicate plumose setae, the exopod is 7-jointed, the terminal joint furnished with 2 long plumo
. Bulletin - United States National Museum. Science. A REVIEW OF THE MYSIDACEA 95 Male pleopods very distinctive, especially those of the second and third pairs; the endopod of all the pleopods of the male is composed of a single short joint; the exopod of the first pair (fig. 27, a) is much longer than the endopod and is composed of four joints; in the second pair (fig. 27, b) the sympod is very long and stout, iy2 times as long as the exopod, the endopod is single jointed and furnished with 8 or 9 delicate plumose setae, the exopod is 7-jointed, the terminal joint furnished with 2 long plumose setae; in the third pair (fig. 27, c) the sympod is about 2y2 times as long as broad, shorter and not so stout as the sympod of the second pair and shorter than its own exopod, endopod single jointed and furnished with 2 short curved spines at the apex, the exopod is long and modified in the most extra- ordinary way into a very complicated copulatory organ (fig. 27, c) ;. Figure 27.—Gastrosaccus johnsoni Tattersall: a, First pleopod of male, X 33%; b, second pleopod of male, X 33 %; c, third pleopod of male, X 25; d, fourth pleopod of male, X 33%; e, fifth pleopod of male, X 33%; /, carpopropodus of endopod of one of posterior thoracic limbs, X 33%; g, one of setae of carpopropodus of one of posterior thoracic limbs, enlarged. fourth and fifth pleopods of the male (figs. 27, d-e) very similar to one another, with a short rectangular sympod, a single-jointed endopod and a 2-jointed exopod, all furnished with the usual long plumose setae. Length of adults of both sexes, 10 mm. Occurrence.—East coast of the United States: Albatross station 2272, 2 adult females, 1 adult male. West Indies: The Johnson- Smithsonian Expedition collected two lots of material from Luispena. 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 ori
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Keywords: ., bookauthorun, bookcentury1800, bookdecade1870, booksubjectscience
