. Bulletin - United States National Museum. Science. ISOPODS OF NORTH AMERICA. 3()7 anteriorly at the sides to sun-ound the postei-ior portion of the liead. All th(> seo-nients are equal in lenotii. The epinieron of the second se*;- nicnt extends half the length of the lateral iiiargin; it is broader at its anterior end than at its posterior end. The e|)iniera of the third and fouitli segments occupy the anterior two-thirds of the lateral margin. The epimeron of the fifth segment extends almost the entire length of the lateral margin of the segment. The epimera of the sixth and seventh segm
. Bulletin - United States National Museum. Science. ISOPODS OF NORTH AMERICA. 3()7 anteriorly at the sides to sun-ound the postei-ior portion of the liead. All th(> seo-nients are equal in lenotii. The epinieron of the second se*;- nicnt extends half the length of the lateral iiiargin; it is broader at its anterior end than at its posterior end. The e|)iniera of the third and fouitli segments occupy the anterior two-thirds of the lateral margin. The epimeron of the fifth segment extends almost the entire length of the lateral margin of the segment. The epimera of the sixth and seventh segments reach the posterior extremity of the lateral margin, and ai"e broader at the posterior end than at the anterior end. The legs are all similar. The inferior margin of the merus, car})us, and projKxlus is densely furnished with hairs. The abdomen has two short segments and one long terminal one with lateral rudiments of another })artly coalesc(»d segment. The terminal segment ta})ers to about the middle, and from that point to the post-lateral angles, the sides are nearly parallel. The lateral angles are rounded. The posterior margin is produced in an obtuse median process, triangulate in shape, and extending sonu* distance beyond the lateral angles. The apex of this process is rounded. IDOTHEA PHOSPHOREA Harger. Jdotca phosphorca IIai«;ek with N'crrill, Rejiort U. 8. Coiumiasioner of P^isli and Fisheries', Pt. 1, 1873, p. 5(59 (275); p. 816 (22).—Vekkill, Am. Jour. Sci., 1874, pj). 43, 45, 131; Proc. Amer. Assoc, 1874, pp. 362, 367, 369.—Whiteaves, Am. Jour. Sci., VII, 1874, p. 218.—Harger, Proc. U. S. Nat. Mus , II, 1879, p. 160; Report U. S. Commis- sioner of Fish and Fisheries, Pt. 6,1880, pp. 347- 348, pi. V, figs. 27-29. Idolea marina var. pJiosphorea Miers, Journ. Linn. Soc. London, Zoology, XVI, 1883, pp. 31-32. Llotea phoKphorea Richardson, American Naturalist, XXXIV, 1900, p. 227; Proc. U. S. Nat. Mus., XXIII, 1901, p. 541.—Paulmier, Bull. New York S
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