4>14 Neopleustes 



Stout, compact, no dorsal projections. ßosti'um veiy slight, post- 

 antennal corners little produced. Side-plates 1 — 4 deep, 1^* rather expanded 

 distally, 1^* — 3"^ with denticle at bind corner, 4*^^ subquadrate below eraargination. 

 Pleon Segment 3, postero-lateral corners subquadrate, point obtuse. Eyes 

 small, rounded, dark red. Antennae 1 and 2 unusually short. Antenna 1, 

 1^* Joint rather thick, as long as 2^ and 3"^ combined, flagellum not twice 

 as long as peduncle, 12-jointed. Antenna 2 a little shorter, ultimate and 

 penultimate joints of peduncle subequal, together as long as flagellum. 

 Gnathopods 1 and 2 moderately strong, closely alike, 5*^ Joint very short, 

 lobe linguiform, 6^^ very lai'ge, as long as 2^ Joint, widest at palm, which 

 is as long as bind raargin, convex, defiued by projecting angle and palmar 

 spines. Peraeopods 1 — 5 moderately long and spinulose, very slender. 

 Peraeopods 3 — 5, 2*^ Joint oval, largest in peraeopod 5 with bind margin nearly 

 straight. üropod 3 comparatively short, outer ramus 73 as long as inner. 

 Telson oblong triangulär, not nearly twice as long as broad at base, apex 

 obtuse. Colour whitish, more or less darkened with dark brownish violet. 

 L. 9 scarcely 4 mm. 



Arctic Ocean (North-Norway; Greenland?). 



6. N. assimilis (O. Sars) 1882 Paramphithoe a., G. 0. Sars in: Forh. Selsk. 

 Christian., nr. 18 p. 99 t. 5 f. 1,1a j 1887 P.a., H.J.Hansen in: Vid. Meddel., ser. 4 

 V. 9 p. 124 I 1893 P. a., G. O. Sars, Crust. Norway, v. 1 p. 352 1. 124 f. 1 | 1893 Acan- 

 thozone pulcheüa (part.)?, A. DellaValle in: F. Fl. Neapel, v.2Q p. 605. 



With uo dorsal projections. Rostrum short, obtuse, post-antennal 

 corners little produced. Side-plate 1 slightly expanded distally, 2^ and 3<^ large, 

 ist — 3d ^i|;jj denticle at bind corner, 4*^ acute below emargination, narrow 

 distally. Pleon segment 3, postero-lateral corners acutely produced, but 

 not into a tooth. Eyes rather large, rounded triangulär. Antenna 1 veiy long, 

 1^* Joint longer than 2^ and 3*^ combined, flagellum more than 4 times as long 

 as peduncle, Antenna 2 much shorter, ultimate Joint of peduncle longer than 

 penultimate, flagellum about twice as long as peduncle. Gnathopods 1 

 and 2 rather feeble, 5*'^ Joint rather long and little widened, 'o^^ longer 

 than h^^, not nearly so long as 2*^, widest at palm, which is not nearly 

 so long as spinöse bind margin. Peraeopods 1 — 5 long and slender. Peraeo- 

 pods 3—5, 2^ Joint oval, serrulate behind, in peraeopod 5 its bind margin 

 very convex. üropod 3, rami spinöse, outer longer than peduncle, little 

 over half as long as inner, Telson fully twice as long as broad, apex evenly 

 rounded. L. 9 8 mm. 



Arctic Ocean and North-Atlantie (West -Norway; Greenland, depth 19 — 113 m). 



7. N. bairdi (Boeck) 1872 Para»«p/«^Aoe 6., A. Boeck in: Forh. Selsk. Christian., 

 1871 p. 45, 50 t. 1 f. 3. 



Dorsum without keel or teeth. Head a little outdrawn, forming 

 no proper rostrum: post-antennal corners blunt. Side-plates 1—4 large, 

 distally rounded, feebly serrulate on lower bind margin. Pleon segment 3, 

 postero-lateral corners subquadrate. Eyes moderately large, oval, black. 

 Antenna 1, 1^* Joint stout, longer than 2*^ and 3<^ combined, flagellum about 

 thrice as long as peduncle, 40— 45-jointed. Antenna 2 much shorter, 

 ultimate Joint of peduncle longer than penultimate, flagellum much longer 

 than peduncle. about 24-jointed, Mandibular palp. 3*^ Joint much louger than 2*^. 

 Maxilla 2, inner and outer plates small. Maxillipeds, outer plates not reaching 



