Jfototropis 



388 



broader, less deep, distal border sligbtly emargiuate, 5*'^ witb front lobe 

 subacute. Pleon segment 3, postero-lateral corners rotundo-quadrate witb 

 miuutelj produced point. Eyes small, rouiided. carmine. Antenna 1 very 

 slender, nearly Ys ^s long as body, 1** Joint mucb shorter than 2^, 3^ very 

 sniall, flagellura about twice as long as peduDcle, witb about 45 joints. 

 Antenna 2 little longer, ultimate and penultimate joints of peduncle subequal, 

 flagellura about as long as peduncle, witb 50 sbort joints. Gnatbopods 1 

 and 2 very slender, 5"^*^ Joint louger, little naiTower than 6^^, botb densely 

 ^etose, palm ratber oblique, shorter than bind margin. Gnatbopod 2 longer 

 and more slender than gnatbopod 1. Peraeopods 1 and 2, 4*^^ Joint scarcely 

 iis long as 5*^^ and 6*'^ combined. 5*'^ mucb shorter than H*^. Peraeo- 

 pods 3 — 5 ratber long, 5*** Joint rauch longer than 6*^ finger scarcely 

 reversed, 2'^ Joint in peraeopod 3 witb lower bind corner acute but scarcely 

 produced, 2^ Joint in peraeopod 5 very wide, and distally abruptly narrowed. 

 scarcely forming a lobe and not ending aCutely. Brancbial vesicles not 

 pleated. Uropod 3, rami extending mucb or little beyond uropods 1 and 2, 

 4 or 5 times as long as peduncle, densely spinöse. Telson scarcely longer 

 than broad, cleft nearly to the base (Boeck: mucb longer than broad; cleft 

 not so far extending), apices not dehiscent, transversely truncate, eacb witb 

 ii spinule, L. o 23 — 35 mm. 



Arctic Ocean (Finmark, Greenland, Spitzbergen, Siberia). 



7. N. homoohir (Hasw.) 1885 Atylus h.: Haswell in: P. Linn. Soc. X. S. 

 Wales. ».10 p. 101 t. 13 f. .'i— 7 (jnv.) [ 1888^1./*., T. Stebbing in: Kep. Voy. Challeuger, 

 /•.29 p.9()8 t. 74 I 1893 .4. swammerdamii (part.). A. DellaValle in: F. Fl. Neapel, r.20 p.698. 



Body bighly compressed, very distinctly carinate, peraeon segment 7 

 and pleon segments 1 — 3 produced to minute teeth, the hinder tooth on 

 Segments 4 and 6 more prononnced, the 4*^ witb the usual notch, the 

 coalesced 5*^ and 6*^ witb a small anterior tooth. Head, rostrum slender. 

 acute, reacbing middle of 1^* Joint of antenna 1, lateral margins forraing 



77. N. homochir. 

 Maiidible. 



Fig. 78. N. homochir. 

 >kixilla 1. 



below a deflexed lobe, post-antennal corners acutely produced. Side-plate 1 

 narrow, beut forward, spiniferous, 2^ — 4*^ successively wider, also crenulate 

 and spiniferous, 4*^^ witb lower border a little emarginate, 5*^ witb naiTowly 

 produced front lobe. Pleon segments 1 — 3, postero-lateral corners produced 

 to a small acute point. margin above convex. Eyes oval reniform. Antennae 1 

 and 2 elougate, peduncie carinate. Antenna 1. l***^ Joint distally produced 

 into a Short tooth, 2^ Joint ratber louger, 3^ about ^j^ length of 2<^, witb a little 

 tubercle looking like rudiment of accessory flagellura, flagellura considerably 

 longer than peduncle, 40-jointed. Antenna 2 ratber longer, ultimate Joint 



