340 Eusirus 



rounded quadrangular, palm little arched,finger powerful. Peraeopods 1— 5 more 

 robust than in other species, very spinulose. Peraeopods 1 and 2, 4*'' Joint 

 not mucli longer than 5*^. Peraeopod 5, 2^ Joint not nearly twice as long 

 as broad, in length subequal to 6**i Joint, üropod 3, inner ramus rather 

 longer than outer. Telson large, sliglitly tapering, cleft nearly to centre, 

 fissure not dehiscent tili uear to the acute divergent apices. Colour uni- 

 formly yellowish, or whitish yellow passing over to the colour of the face. 

 L. reaching 39 mm. 



North-Atlanüc and Arctic Ocean (Greenland, Spitzbergen, Finmark). Depth 

 38—113 m. 



2. E. propinquus 0. Sars 1893 E. propinqvus, G. O. Sars, Crust. Norway, 

 v.l p. 417 t. 147 f. 1. 



Body moderately slender, not strongiy carinate, peraeon scarcely carinate 

 tili Segment 7, which has the dorsal tooth almost obsolete, only pleon segments 1 

 and 2 produced into a prominent dorsal tooth. Head, rostrum small, lateral 

 Corners nearly trausversely truncate. Side-plate 1 well expanded distally, front 

 Corner rounded, hinder with 1 denticle. Pleon segment 3, postero-lateral 

 Corners narrowly rounded, lateral margin finely serrate. Eyes large, oval 

 reniform, light red. Antenna 1 in 9 , 1^* Joint fully as long as 2*^ and 

 3^ combined, with dentiform apical lobe, flagellum scarcely as long as 

 peduncle, 3*^ Joint of .peduucle and the flagellum calceoliferous on lower margin, 

 accessory flagellum linear, longer than 3^ Joint of peduncle. Antenna 2 little 

 shorter, ultimate Joint of peduncle rather shorter than peuultimate, both 

 with flagellum calceoliferous on upper margin, flagellum about half as long as 

 peduncle. Gnathopods 1 and 2 less robust than in E. cuspidatus (p. 339), lobe 

 of 5*^ Joint very narrow, 6*^ nearly elliptical, much broader than long, palm 

 rather arched, finger very slender. Peraeopods 1 and 2 very slender, 4*'^ Joint 

 twice as long as 5*^ Peraeopods 3 — 5 rather slender, 6*^ Joint narrow, 

 long, finger slight; 2*^ Joint in peraeopod 5 nearly twice as long as broad, bind 

 margin insinuate. üropod 3, rami narrowly lauceolate, inner little longer 

 than outer, both with setae as well as spinules on inner margin. Telson 

 naiTOw, tapering, margins finely spinulose, cleft not quite to middle, apices 

 acute, scarcely divergent. Colour semipellucid, orange-tinted, reddish brown 

 on hinder margins of segments, antennae 1 and 2 banded with red. 

 L. 9 12 mm. 



North-Atlantic and Arctic Ocean (Trondhjemsfjord, depth 188 — 'J82m; Selsövig 

 [NordlandJ; Finmark). 



3. E. antarcticus O. M. Thoms. 1880 E. cuspidatus var. a., G. M. Thomson 

 in: Ann. nat. Hist., ser. 5 ?;.6 p.4 | 1888 E. longipes (err., non A.Boeck 1861 !), T. Stebbing 

 in: ßep. Voy. Challenger, i?.29 p.965 t. 87 | 1893 E. l.?, G. 0. Sars, Crust. Norway, v.l 

 p.421 \ 1893 E. cuspidatus (part.), A. DellaValle in: F. Fl. Neapel, «.20 p. 669, 671. 



Exceedingly like E. propinquus; difl'ers in following points. Side- 

 plate 1 more produced forward. Peraeon segment 7 with dorsal tooth 

 more pronounced. Eyes rather dark brown (in spirit), Visual elements 

 well developed. Antennae 1 and 2 apparently not calceoliferous. Antenna 1, 

 1^* Joint much thicker, scarcely longer than 2*^, in ö trausversely banded 

 below with setules, accessory flagellum linear, length variable, but scarcely 

 longer than 3"^ Joint of peduncle, flagellum of many short joiuts, the 

 1^* sometimes long. Antenna 2 in d, upper margin of ultimate and pen- 

 ultimate joiuts of peduncle trausversely banded with setules. Mandible, 

 molar prominent, but smaller than that figured by Sars for E. propinquus. 



>'ä^- «wiSiÜ'SiLi^ . 



