Halirages 291 



not quite twice as long- as broad, strongly tapeving to an emarginate apex 

 bounded by sliarp points. L. V) to aboiit 18 lum. 



Baffin Bay. Doptli 9 27 in. 



2. H. fvilvoeinetus i^Sars ) 1858 Ampitithoe fulvocincta. M. Sars in: Forli. Selsk. 

 Christian., p. 141 | 1866 Paramphitho'e f., Goes in: Öfv. Ak. Förh., u 22 p. 525 

 t. 39 f. 15 I 1871 Halirages fulvomictus, A. Boeck in: Forh. Selsk. Christian.. 1870 

 |).196 j 1876 H.f., A. Boeck. Skand. Arkt. Ämphip., v.2 p.342 t.23 f.llf. 1 1888 H. f., 

 T. Stebbing in: ßep. Voy. Challenger, /'.29 p.90 | 1893 H.f., G. O. Sars, Crust. IS'orway, 

 V. 1 ]). 436 t. 154 I 1893 Acanthozone fulvocincta (part.), A. Della Valle in: F. Fl. 

 Neapel, u20 p. 614 t. 59 f. 27 \ 1864 Pherusä fricuspis, Stirapson in: P. Ac. Philad.. 

 1863 p. 139. 



Peraeon segmeut 7 and pleon seginents 1 and 2 eacli produced to 

 a dorsal tooth. Side-plates 1 — 3 quadrate with rounded corners, 4*^* broader, 

 more rounded, emarginate bebind. Pleon segraent 3, postero-lateral corners 

 and lateral margin as in H. nilssoni. Kyes large, oval, brigbt red. Antenna 1 

 in o more thau -/s length of body, flagellum more tban 4 times as long 

 as peduncle, otherwise as in H. nilssoni: antenna 2 longer, ultimate and 

 penultimate joints of peduncle subequal, witb many calceoli, flagellum nearly 

 4 times as long as peduncle, with calceoli in double row. Anteunae 1 and 2 in d 

 still more elongate. Mandible, 3"^' Joint of palp longer than 2'^, curved. 

 closely Mnged. Maxillipeds, outer plates with smooth inner margin, fringed 

 with submarginal spine-teeth, 3'^ Joint of palp apically a little pi'oduced. 

 Gnathopod 1, 5**^ Joint slightly widening distally, 6*^ subequal, rather 

 nan'owly oblong, palm much shorter than bind margin, not very oblique, 

 but defined by an obtuse angle, armed witli short spines, finger shoii. 

 Tinathopod 2 similar, rather longer. Peraeopods 1—5 moderatel} long, 

 fringed with fascicles of spinules. Peraeopod 5, 2*^ Joint broadly oval, much 

 larger than tliat of peraeopods 3 and 4, lünd margin smooth, roundly produced 

 below. üropod 3, peduncle rather long, rami nearly twice as long as peduncle, 

 densely fringed with spiimles and on the inner margin also with setae. Telson 

 about twice as long as broad, slightly tapering, apex very slightly emarginate 

 and serrulate. Colour pellucid, yellowish, ti-ansversely banded with orange. 

 L. o reaching 19 mm. 



Arctic Ocean (widely distributed, reaching lat. 82*^27'^.); North- Atlantic (Soiilii 

 of Halifax [Nova Scotia], whole West-Norway). Depth 2-470 (659?) m. 



3. H, huxleyanus (Bäte) 1862 Atyliis h., Bäte, Cat. Amphip. Brit. Mus., ]). 135 

 t. 25 f.4i 1888 Halirages h., T. Stebbing in: Rep.Voy. Challenger, r. 29 p. 902 t. 73 

 1893 AcantJwzone huxleyatia, A. Della Valle in: F. Fl. Neapel, ?;.20 p. 612 t. 59 f. 23. 



Back rounded to end of peraeon segment 15, imbricated, peraeon 

 Segments 5 — 7 with postero-lateral angles produced acutely backward. 

 Peraeon segment 7 and pleon segments 1 — 3 eacJi produced iuto a large 

 tooth, and at least pleon segments 1 — 3 carinate, peraeon segment 6 

 slightly toothed. Head, rostrum acute but very small. Side-plates 1 — 4 

 small, of rather irregulär shape, 4*^^ not much larger than 3'^, 5**» sti'ongly 

 bilobed. Pleon segments 1 — 3, postero-lateral corners produced into short 

 acute points. Eyes round, no.t veiy large, dark in spirit, witli a light rim. 

 Antenna 1, l^^ Joint not as long as 2*^ and 3'^ combined. 3* more than 

 half 2*1, flagellum 3 or 4 times as long as peduncle, with 62 joints, at inteiTals 

 much widened distally. Antenna 2, peduncle rather longer than in antenna 1, 



