72 Tryphosa, Chironesiiiius, Eurythenes 



1*** the lougest. Epistorae rather prominent, rounded. Gnathopod 1 slender, 

 6*^ Joint a little shorter than 5**^, palm uearly transverse. Gnathopod 2, 

 6*^ Joint scarcely as broad as 5*^. üropod 3, inner ramus rather longer 

 than basal Joint of outer. Telson with 3 pairs of marginal spinules. Colour 

 pale reddish. L. Q 7, <5 6 mm. 



Arctic Ocean and Xorth- Atlantic (North America, Scandinavia). Depth 94 — 282 m. 



43. Gen. Chironesinms 0. Sars 



1891 Chironesimus (Sp. un.: C. debruynii), Gr. 0. Sars. Crust. Norway, c.l p. 108 

 1894 C, T. Stebbing in: Bijdr. Dierk., v. 17 p. 13. 



Head, lateral lobes slightly produced, subacute. Side-plate 1 scarcely 

 expanded below, 4*^ rather considerably. Pleon segment 3, postero-lateral 

 angles acutely upturned. Epistome not projecting, upper lip forming in front 

 a rather large compressed linguiform lobe. Mandible, molar tapering to a 

 blunt apex, palp rather large, set well forward. Maxiila 1, 2 setae on inner 

 plate, 11 spines on outer, 9 spine-teeth on palp. Maxilla 2, inner plate not 

 veiT nan'ow, more than half as long as outer, Maxillipeds, broad outer 

 plates set with minute teeth on inner and apical margin, 4*^^ Joint of palp 

 not elongate. Gnathopod 1 subchelate, 6*^ Joint shorter and much naiTower 

 than 5**S oblong, slightly naiTOwed towards the short almost transverse palm. 

 Gnathopod 2, 2^ Joint rather shorter than 5*, 6^^^ more than half as long 

 as 5*^ widening distally, front margin longer than bind one, palm concave, 

 the curved finger not reaching its outer angle. Peraeopods comparatively 

 slender. Peraeopods 3 — 5, 2^ Joint large, 4*^ not veiy robust, üropod 2, 

 inner branch constricted. üropod 3 reaching beyond üropod 2, rami longer 

 than peduncle, subequal, lanceolate, outer with small second Joint, both 

 carrying spinules and setae. Telson nearly twice as long as broad, cleft 

 more than % leugth, a spinule in each of the blunt rather divergent apices. 



1 species. 



1. C. debruynii (Hoek) 1882 Anonyx d., Hoek in: Niederl. Arch. Zool.. suppl. 1 

 ur. 7 p.44t. 3 f. 30-30x | 1893 A. d., A. Della Valle in: F. FI. Xeapel, v. 20 p. 830 

 1891 & 95 Chironesimus d., G. 0. Sars, Crust. Norway, tA p.l09 t.o7 f. 2; p. 687 1 1894 

 C. d., T. Stebbing in: Bijdr. Dierk., v. 17 p. 13. 



Eyes oblong oval, a little broader below, red. Antenna 1, 1*^* Joint 

 tumid, ridged on inner margin, 2^ and 3'^ very short, flagellum in o with 11 joints. 

 in d with 1 8 (or more), 1^* largest, accessory flagellum with 6 joints, 1-^* large and 

 somewhat expanded. Antenna 2, ultimate and penultimate joints of peduncle 

 subequal. flagellum in Q with 15 joints, in <S with 20 (or more). Gnatho- 

 pod 1, the 6^'! Joint is as long as the b^^ and tapers too much to form a 

 palm (Hoek, not Sars or Stebbing). Peraeopod 5, 2*^ Joint broadly oval, 

 about as long as rest of limb. Colour yellowish white, intestine dark brown, 

 ovaries reddish. L. (c^juv.?) 20 (Hoek), 9 14 (Sars) mm. 



Arctic Ocean; North- Atlantic and North-Sea (West-Norway). Depth 94 — 240m. 



44. Gen. Eurythenes S. I. Sm. 



1865 Eurytenes (Sp. un. : E. magellanicus) (non Arn. Focrster 1862, Hymenoptera !). 

 W. Lilljeborg in: N. Acta Soc. Upsal., ser. 3 v.6 nr. 1 p. 11 | 1882 Eurythenes, (S. 1. 

 Smith in:) Scudder, Nomencl. zool., suppl. L. p. 135 1 1884 E., S. I. Smith in: Amer. 

 J. Sei., ser. 3 v. 28 p. 54 | 1891 Euryporeia, G. 0. Sars, Crust. Norway, v. 1 p. 85 | 1893 

 E., A. Della Valle in : F. Fl. Neapel, v. 30 p. 847. 



