Hev. A. M. Norman on new Crustacea Am^hi^oda. 411 LII. — On Crustacea AmpMpoda new to Science or to Britain. By the Eev. Alfred Merle Norman, M.A. [Platea XXI., XXII., and XXin. figs. 1-11.] Genus Haploops, Lilljeborg. Body compressed, coxge deep. Eyes two, simple. Superior antennce slender, no secondary appendage. Mandibles with a three-jointed, maxillce with two-jointed, and ma^illipedes with four-jointed palp. Both gnathopods having a small subche-late hand. First and ^Qcondi pereiopods with the metacarpus dilated, the wrist and hand narrower, the nail long and straight. Pleon having the fifth and sixth segments coalesced. Last uropods two-branched, branches flattened. Haploops tubicola^ Lilljeborg. PI. XXI. figs. 1-3. Ampelisca Uschnchtii, Lilljeljorg, Offers, af Kongl. Vet. Akad. Forhandl. 1852, p. 6. Hajjloojjs ttibicola, Lilljeborg, Ofvers. af Kongl. Vet. Akad. Forliandl. 1855, p. 134 ; Bruzelius, Skand. Amphip. Gamniaridea (1859), p. 88 ; Bate, Cat. Ampliip. Crust. Brit. Mus. p. 371 ; Norman, Trans. Tyneside Nat. Field Club, vol. v. (1863) p. 279; Goes, Crust. Amphip. maris Spets-bergiam alluentis (1865), p. 12. Superior antennce shorter than inferior; middle joint of peduncle the longest. Inferior antennce having the peduncle rather longer than that of superior, last joint slightly longer than fourth ; flagella of both antennge fringed throughout with unusually long and conspicuous setae. Gnathopods : both pair alike, haiiy ; hand ovate, rather shorter than wrist ; finger small. First and second per eiopods with metacai*pus very long and flattened, longer than wrist and hand combined ; wrist very short, hand double length of wrist ; nail very long, slen-der, and acute. Third d.rA fourth per eiopods presenting an un-usual appearance, from the wrist being much broader at its termination than the hand, which articulates with the anterior portion of its distal extremity, while the posterior portion is furnished with a bundle of stout spines ; there are also three transverse rows of spines on the sides of the wrist ; hand as long as wrist, but only half as broad ; nail very short, stout. Last per eiopods with the thigh produced posteally and also inferiorly, but in such a way that the hinder margin is slightly concave ; surface of thigh setose ; metacarpus and wrist ex-panded, wide, flat, lobed at the margins and edged with spines and spine-like setse ; hand and nail very minute, combined scarcely larger than an ordinary nail ; hand articulating with 29*
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