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 



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