. Bulletin - United States National Museum. Science. 466 BULLETIN 54, UNTTED STATES NATIONAL Fig. 521.—Iolella holmesi. x 7. is large, dilated; the two following- joints are slender; the flagellum consists of twenty joints. The second pair of antenna? are longer than the bod}. The first four joints are short, with an articulated exopod on the third joint; the fifth and sixth joints are ver}^ long, the fifth being slightly longer than the sixth; the tlagellum consists of numerous joints. The posterior portion of the lateral margin of the first segment of the thorax is produced on eithe
. Bulletin - United States National Museum. Science. 466 BULLETIN 54, UNTTED STATES NATIONAL Fig. 521.—Iolella holmesi. x 7. is large, dilated; the two following- joints are slender; the flagellum consists of twenty joints. The second pair of antenna? are longer than the bod}. The first four joints are short, with an articulated exopod on the third joint; the fifth and sixth joints are ver}^ long, the fifth being slightly longer than the sixth; the tlagellum consists of numerous joints. The posterior portion of the lateral margin of the first segment of the thorax is produced on either side in a triangular process; the epimeron is situated at the anterior portion of the lateral margin and is produced in a triangular process about as long as the posterior one. The anterior as well as the posterior lateral angles of the second and third segments are each pro- duced in a long process, with the bifurcate epimeron situated between. The anterior portion only of the lateral margin of the fourth segment is produced with the bifurcate epimeron situated at the posterior portion of the segment. The fifth, sixth, and seventh segments have the anterior portion of the lateral margin pro- duced in a process which extends outward and down- ward and in the last segment is triangularly produced at the posterior extremity, the epimeron in each segment occupying the posterior portion of the segment. The abdomen is composed of a single segment, the posterior margin of w^hich has a widely rounded median expansion with an acutely pointed lateral expansion on either side. The uropoda are about equal to the abdomen in length; the outer branch is slightly shorter than the iiuier one; the basal joint is equal in length to the outer branch. The legs are all furnished with bi-unguiculate dactyli. The first pair are prehensile, the carpus being very large and armed with spines along the inner margin; the propodus is serrulate along the inner margin at the proximal end. Two specimens,
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Keywords: ., bookauthorun, bookcentury1800, bookdecade1870, booksubjectscience
