. Bulletin - United States National Museum. Science. 30 BULLETIN 54, UNITED STATES NATIONAL MUSEUM. LEPTOCHELIA RAPAX Harger.« Leptochelia Harger, Proc. U. S. Nat. Mus., II, 1879, p. 163; Report U. S. Commissioner of Fish and Fisheries, 1880, Pt. 6, pp. 424-426, pi. xiii, figs. 89, 90.—Sars, Archiv. for Math, og Naturvid., 1882, p. 28.—Richard- son, American Naturalist, XXXIY, 1900, p. 212; Proc. U. S. Nat. Mus., XXIII, 1901, p. 503; Trans. Conn. Acad. Sciences, XI, 1902, p. 279. Localities.—Annisquam, Massachusetts; and the Bermudas. Depth,—3 ft. on mudd^' bottom; \ fathom. Lives in tu
. Bulletin - United States National Museum. Science. 30 BULLETIN 54, UNITED STATES NATIONAL MUSEUM. LEPTOCHELIA RAPAX Harger.« Leptochelia Harger, Proc. U. S. Nat. Mus., II, 1879, p. 163; Report U. S. Commissioner of Fish and Fisheries, 1880, Pt. 6, pp. 424-426, pi. xiii, figs. 89, 90.—Sars, Archiv. for Math, og Naturvid., 1882, p. 28.—Richard- son, American Naturalist, XXXIY, 1900, p. 212; Proc. U. S. Nat. Mus., XXIII, 1901, p. 503; Trans. Conn. Acad. Sciences, XI, 1902, p. 279. Localities.—Annisquam, Massachusetts; and the Bermudas. Depth,—3 ft. on mudd^' bottom; \ fathom. Lives in tubes. Body narrow, elongate, about four times as long as wide, 1 mm.: 4 mm. Head as wide as long, 1 mm.:1 mm., with the anterior margin between the eyes triangularly produced. The eyes are small, round, composite, and situated on the produced antero- lateral angles of the head. The tirst pair of antennae are extremely long in the male; the first article is 1^ mm. long, or longer than the head; the second article is one-half as long as the first; the third is one-half as long as the second. The tlagellum is composed of seven articles. The second pair of antennae are very short and feeble as compared with the tirst antennas, and extend only half the length of the first article of the second antennae The first article of the second antenna? is about equal in length to the second; the third is a little shorter than the second, and is furnished with hairs at the tip. The first segment of the thorax is coalesced with the head. The six following free segments are about equal in length, with the exception of the first, which is a little shorter than any of the others. The abdomen is composed of six segments, sub- equal in length, the last segment not having the lateral parts developed as in the five preceding segments. The urop- oda are double branched. The inner branch is composed of five arti- cles. The outer branch is composed of only one article. The peduncle of the uropoda
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