54 Anonyx 



tooth. Gnathopod 2, 6^'^ Joint oval, its apex slightly produced beneath the 

 minute finger. Peraeopods rather long, 2*^ Joint large in peraeopods 3 — 5. 

 Branchial vesicles ti-ansversely folded on both sides. Uropod 3 projecting 

 beyond the preceding pair, rami lanceolate, with spinules and setae on the 

 margins. Telson deeply cleft, with a pair of apical spinules. 



5 species. 



Synopsis of species: 



) Eyes greatly dilated below — 2. 



\ Eyes not greatly dilated below — 3. 



( Gnathopod 1, 6tli Joint not longer than Stt . . . 1. A. nugax p. 54 



\ Gnathopod 1, 6tli Joint longer than 5tli .... 2. A. lagena p. 54 



/ Antenna 1, flagellum and accessoiy flagellum sub- 



) equal 3. A. affinis p. 55 



1 Antenna 1, flagellum and apcessory flagellum 

 ' unequal — 4. 



1 Side-plate 1 scarcely widened below 4. A. lilljeborgii . . . p. 55 



\ Side-plate 1 much widened below 5. A. ainpvilloides . . p. 55 



1. A. nugax (Phipps) 1774 Cancern., Phipps, Voy. North Pole, p. 192 t. 12 

 1. 2 1781 Gammarus n., J. C. Fabricius, Spec. Ins., v. 1 p. 516 | 1826 Talitrus n., 

 J. C. Eoss in: W. E. Parry, J. third Yoy., App. j). 119 | 1829 Gammarus n., Atylus 

 (part.)?, Latreille in: G. Cuvier, Regne an., n.ed. vA p. 120 j 1877 Anonyx n., Miersin: 

 Ann. nat. Hist., ser. 4 v. 19 p. 135 | 1891 & 95 A. n. (part.), G. O. Sars, Crust. Norway, 

 r. 1 p. 88, 686 | 1893 A.n. (part.), A. Della Valle in: F. Fl. Neapel, ».20 p. 834 | 1894 

 A.n., T. Stebbing in: Bijdr. Dierk., t'. 17 p. 7 | 1845 & 46 A. ampulla (part.), Kreyer 

 in: Naturh. Tidsskr., ser. 2 v.l p. 578; v.2 p. 43 | 1862 A. lagena (err., non Kröyer 

 1838!), Bäte, Cat. Amphip, Brit. Mus., p. 77 t. 12 f. 7 j 1866 Lysianassa l, Goes in: 

 Öfv. Ak. Förh., V. 22 p. 518. 



Head, lateral angles little produced, slightly rounded. Side-plate 1 

 widened below. Pleon segment 3, postero-lateral angles with upturned 

 process acute, not long, segment 4 slightly carinate. Eyes flask-shaped, 

 greatly widened below, very dark. Antenna 1, 1^* Joint not much longer 

 than broad, flattened on inner side, sometimes also ridged on the outer side. 

 flagellum in 9 of 23, in ö of 34 joints, l*** not very elongate, accessory flagellum 

 with 10 joints, 1^* the longest. Antenna 2, ultimate Joint of peduncle a little 

 shorter than penultimate, flagellum in § reaching 40, in ö 60 joints. Gnathopod 1. 

 6**1 Joint equal in length to 5*^ Gnathopod 2, 6*'^ Joint oval, rather more 

 than half length of h^^. üropod 2, inner ramus constricted. üropod 3, 

 rami broad and flat, inner almost as long as outer, of which the 2*^ Joint 

 is small. Telson oblong, breadth two thirds of the length, very deeply 

 cleft, 2 or 3 pairs of marginal spinules and a paii- on the obtuse apices. 

 Oolour light rose-red on the back, nearly white on the sides (Kr0yer), light 

 claret-red (Sars). L. reaching 45 mm or more. 



Arctic Ocean, to lat. 83o 19' N. Depth 18—1184 m. 



2. A. lagena Kröyer 1838 Lysianassa l., A. l. (Reinhardt in MS.) -\- L. appen- 

 diculosa, A. appendiculosus. Kröyer in: Uanske Selsk. Afh.. ».7 p. 237, 244 t. 1 f. 1; 

 p. 240, 244 t. 1 f. 2 I 1838 A. l.-\- A. appendiculosus, Kröyer in: Naturh. Tidsskr., v.2 

 p. 256, 257 1 1840 Lysianassa l. -f- L. appendicidata, H. Milne Edwards, Hist. nat. Crust., 

 ».3 p.21 1 1855 Lycianassa l, T. Bell in: Belcher, Last arct. Voy., v.2 p. 406 | 1871 

 Anonyx L, A. Boeck in: Forh. Selsk. Christian., 1870 p. 108 \ 1889 A. kükenthali, 

 V'osseler in: Arch. Naturg., v.bbi p. 154 t. 8 f . 1 — 17 | 1891 & 95 A. nugax (part), 

 A. lagena, G. O. Sars, Crust. Norway, v. 1 p. 88 t. 31 : p. 686. 



