Apherusa 307 



5. A. glacialis (H. J. Hanseu) 1887 Amphithopsis g., H.J.Hansen in: Vid. 

 Meddel., ser. 4 v.9 p. 137 t. 5 f. 6— 6c | 1894 A. g., T. Stebbing in: Bi.jdr. Dierk., ».17 

 p. 35 I 1895 Apherusa g., Ohlin in: Acta Univ. Lund., v.'d] nr. 6p.46 | 1893 Acanthozone 

 longimana (part.), A. Della Valle in : F. FI. Neapel, v. 20 p. 604. 



Body sleiider, back without dorsal teeth, except a pair of minute points 

 DU pleon Segment 6. Head, rostrum obsolete, lateral corners rounded. Pleon 

 segm'eiit 3, postero-lateral corners showiug only an incipieut tooth, margin 

 above slightly convex. Eyes rather large, rounded, dark with light rim. 

 Antennal scarcely 7« as long as body, 1'^* Joint as long as 2*^ and 8"^ combined, 

 flagellum nearly tbrice as long as peduncle. Antenna 2 rather longer, ultimate and 

 penultimate joints of peduncle subequal. Maxilla 1, inner plate with 9 setae, 

 outer narrow with 7 or 8 spines, slender, crowded. Maxillipeds, inner plates 

 as large as outer and reachiug as far, outer plates fringed on inner margin 

 with spine-like setae, 1^* Joint of palp short, 2*^ broad, 4*^ short, with minute 

 nail on the blunt apex. Gnathopods 1 and 2, 5*^^^ Joint long and narrow, 

 but wider as well as much longer thau the sublinear 6*^, whicli has a very 

 Short transverse palra and finger to match. Gnathopod 1 is longer than 

 gnathopod 2, the extra length being in the 5^^ and 6**^ joints. Peraeopods 1 — 5 

 not very elongate, 5*^ considerably the longest, 2^ Joint in 3*^ — 5*^ pairs 

 oblong ovate. üropods 1 and 2, outer ramus the shorter; uropod 3, rami 

 not greatly longer than peduncle, outer ramus very little shorter than inner. 

 Telson little longer than broad, slightly narrowed distally, apex entire, 

 furnished with a pair of setules. Colour yellowish red. L. 7 — 10 mm. 



Arctic Ocean, reaching lat. 76" 30' N. 



6. A. jurinei (M.-E.) 1830 Amphithoe j., H. Milne Edwards in: Ann. Sei. nat., 

 ?7.20 p. 376| 1840 A. jurinü, H. Milne Edwards, Hist. nat. Crust., v.3 p. 30 1. 1 f . 2 [ 

 1891 Pherusaj., A.O.Walker in: Ann. nat. Hist., ser. 6 v.7 p. 421 [ 1893 Apherusa j., 

 G. 0. Sars, Crust. Norway, v. 1 p. 445 t. 157 f . 1 | 1895 A.j., A. O. Walker in: P. 

 Liverp. biol. Soc, v.9 p. 305 | 1843 Amphithoe norvegica, H. Rathke in: N. Acta Ac. 

 Leop., u 20i p. 83 t. 4 f. 6 ( 1859 Paramphithoe n., 11. M. Bruzelius in: Svenska Ak. 

 Handl., n. ser. v. 3 nr. 1 p. 77 | 1871 Calliopius norvegiciis, A. Boeck in: Forh. Selsk. 

 Christian., 1870 p. 198 | 1876 C. n., A. Boeck, Skand. Arkt. Amphip., v.2 p. 348 t. 22 

 f. 6 j 1862 Pherusa fucicoln (part.) (err., non Leach \9i\^j\A\) -\-?Gossea microdeutopa 

 (Bäte), Bäte & Westwood, Brit. sess. Crust., v.l p. 255; p. 277 f. | 1862 P. f. (part.) + 

 Calliope norvegica -f- ?G. microdentopa, G. microdeutopa. Bäte, Cat. Amphip. Brit. Mus., 

 p. 145; p. 150; p. 160, 387. 396 t. 29 f. 6 | 1891 Apherusa, A. O.Walker in: Ann. nat. 

 Hist., ser. 6 v.8 p. 83 | 1893 Acanthozone laeviuscula (part.), A. Della Valle in: F. Fl. 

 Neapel, u20 p.602. 



Back without any dorsal teeth. Head, rostrum very small, lateral corners 

 rounded, post-antennal acute, neither strongly produced. Side-plates 1 — 3 

 rounded quadrangular. Pleon segment 3, postero-lateral angles forming a 

 Short acute projection, the margin above a triangulär smooth lobiö (Milne 

 Edwards). Eyes oval reniform, dark brown. Antenna-1 about Vs ^s long as 

 body, P* Joint not quite as long as 2*^ and 3*^ combined, flagellum twice as 

 long as peduncle, 26 — 28-jointed. Antenna 2 about once and a half as long as 

 antennal (Milne Edwards: longer than antenna 1), ultimate and penultimate 

 joints of peduncle equal, flagellum twice as long as peduncle, 1^* Joint longest. 

 Gnathopods 1 and 2 rather feeble, 5*^ Joint shorter than 6*11, which is sub- 

 fusiform, widest at beginning of palm, palm oblique, nearly equal to bind 

 margin. Peraeopods 1 — 5 rather stout, finger curved, 2^ Joint in 3^ — 5^*^ 

 peraeopods oval, bind margin quite smooth. Uropod 3 extending but little (Milne 

 Edwards: much) beyond the others, rami narrowly lanceolate. Telson 

 ti'iangular, not quite twice as long as broad, apex obtusely pointed, having 



20* 



