Leptocheirus 627 



as long as 4*^ and b^^ (iombined. üropods 1 — 3, peduncle in all reaching 

 a little beyond the telson. üropod 3, rami short, not longer than distal 

 breadth of peduncle, outer veiy little the longer, each with 4 apical setae. 

 Telson short, broader than long, faintly emarginate. L. 5 mm. 

 BafBns Bay (lat. TS» N.). Depth 22—32 m. 



3. L. pinguis (Stimps.) 1853 Ptüocheirus p., Stimpson in: Smithson. Contr., 

 V.6 nr. 5 p. 56 | 1888 Lq)tocheiru8 p., T. Stebbing in: Rep. Voy. Challenger. ».29 p. 279 | 

 1893 L.p., A. DellaYalle in: F. Fl. Neapel, ?;. 20 p. 432 t. 57 f. 1—3 [ 1894 L. p., G. 

 0. Sars, Crust. Norway, v.l p. 555 | 1862 Frotomedeia fimbriata (Gammarus fimhriatus 

 Stimpson in MS.) + P. i?., Bäte, Cat. Amphip.Brit. Mus., p.l69 t.31 f.l; p.l70 t.31 f. 2. 



Body very broad anteriorly, naiTowing behind, peraeon not much 

 compressed, with back only slightly vaulted; peraeon segment 1 in d as 

 long as 2^ and 3*^ combined, in Q only as long as 2^; pleon segment 4 

 produced on each side to an obtuse dorso-lateral tooth or angle, o^^ and 6*^ 

 with similar projections, more acute, accompanied by several spinules. Head 

 broader than long, with minute rosti'um; lateral lobes produced, not large, 

 rounded. In 9 side-plate 1 linguiform, strongly produced forward, obtusely 

 pointed; 1^* — 4*^ with bind margin serrate, spiniferous; 2*^ overlapping only 

 a small part of the 1^*, deeper and much broader than 1^* and deeper than 

 broad; 3^ and 4*^ as deep as 2"^ but less broad; 5^^ wi'th front lobe naiTOW, 

 distally narrowed, less deep than 4^^; 6**^ and 7*^ very small. In ö (Stimpson) 

 side-plate 1 large, subrhomboidal, 2^ much the largest, projecting downward, 

 furrowed along the middle. Pleon segment 3, postero-lateral corners a 

 little obtusely quadrate. Eyes obliquely oval, or reniform, dark. Antenna 1 

 scarcely half as long asbody; 1^* and 2'^ joints ratherlong, equal, 3^ about ^g 

 as long as 2^; flagellum longer than peduncle, more than 23-jointed, accessory 

 flagellum 8-jointed. Antenna 2 a little shorter, ultimate Joint of peduncle 

 shorter than penultimate, scarcely as long as the 14-jointed flagellum. 

 Upper lip with pointed process at each upper angle. Mandible with 15 or 

 16 spines in the spine-row. Maxilla 1, outer plate with 11 spines. Maxillipeds, 

 outer plates with inner margin densely fringed, the spines sleuder. Gnatho- 

 pod 1, 6**^ Joint as long as 5*^, gently widening to the transverse, convex, 

 setulose palm, over which the denticulate finger is closely fitted without 

 quite reaching the angle. Gnathopod 2, besides the usual fringes the 4*^ 

 Joint has long setae on lower front margin; ö**^ and 6**^ are densely fringed 

 on bind margin; 6*^ much more than half as long as 5**^, only a little 

 tapering but without palm, about twice as long as the slender setulose finger. 

 Peraeopods 1 and 2, 4*** Joint longer than 5*^ or 6*^ Peraeöpods 3 — 5, 

 2*^ Joint broadly oblong oval. Pleopods, peduncle short, coupling spines 2, 

 with dentate margins, rami very long, inner with 30 joints, outer considerably 

 shorter, with 28. üropods 1 and 2, rami a little unequal, not especially 

 robust, rather longer than peduncle, its process not being included. üropod 3, 

 process of peduncle short. Telson very short, broader than long, centre of 

 apex convex; each angle raised, carrying an oblique surface row of spinules, 

 while higher up on each side, the surface has a row of 5 spines. Colour, 

 ti'ansverse bands of dark gi-ey on a light ground, anteunae and legs white, 

 except expansion of 2*^ Joint in peraeopods 3 — 5. L. reaching 16 mm. 



North-Atlantic (New England and north to Labrador). Low-water mark to 

 at least '^71 m. 



4. L. hirsutimanus (Bäte) 1862 Protomedeia hirsutimana, Bäte (& Westwood), 

 Brit. sess. Crust., v. 1 p. 298 f. | 1862 P. hirsutimanus, Bäte, Cat. Amphip. Brit. Mus., 

 p.l68 t. 30 f. 6 I ?1866 P.A., Cam. Heller in: Denk. Ak. Wien, u26u p. 34 ] ?1866 



40* 



