Liljeborgia 231 



2. L. brevicornis (Bruz.) 1859 Gammarus h., R. M. ßruzelius in: Svenska 

 Ak. Handl., n. ser. u. 3 ur. 1 p. 62 t. 3 f. IIa — o | 1861 G.h., Iduna (part.), A. Boeck 

 in: Forh. Skand. Naturf., M0de8 p. 657 | 1862 Liljeborgia pallida (part.) (err., uon Gam- 

 marus pallidus Bäte 1857!), Bato & Westwood, Brit. sess. Crust., ». l.p. 205 | 1871 

 Lilljeborgia p., A. ßoeck in: Eorh. Selsk. Christian., 1870 p. 155 | 1876 i. j?., A. Boeck, 

 Skand. Arkt. Amphip., v.2 p. 497 t. 18 f . 9 | ?1889 L. p., A. M. Norman in: Ann. nat. 

 Hist., ser.6 vA p.ll6 1. 10 f. 10 | 1894 L.p., G. O. Sars, Crust. Norway, ».1 p.580 1. 187. 



Pleon Segments 1, 2 and 4 (Sars) (Bruzelius and Boeck: Segments 1—5) 

 each produced to a small dorsal tooth. Head, rostrum distinct but short, 

 lateral corners projecting, obliquely rounded. Side-plate 1 distally expauded, 

 ^st — 3d -^jtjj gixiall tooth at lower bind coruer. Pleon segment 3, postero-lateral 

 augles acute, lateral margin straight. Eyes large, oval quadraugular, very dark. 

 Autenna 1, 1^* Joint nearly twice as long as 2^ and 3*^ combined, 3'^ very small, 

 flagellum nearly twice as long as pedimcle, about 20-jointed, accessory peduncle 

 more than ^2 as long as primary, 13-jointed. Antenna 2 about 7^ longer, ultimate 

 Joint of peduncle rather longer tban penultimate, flagellum longer than ultimate 

 Joint of peduncle. Gnathopod 1, 4*^ Joint apically acute, 5*^ produced to a narrow 

 setose lobe, 6*"^ large, ovate, palm curved, oblique, spinulose and setulose, 

 defined from the shorter hind margin by an angle and spines, finger curved, 

 with 6 strong teeth in proximal half. Gnathopod 2 similar, but larger, 

 and larger in d than in 9 , palm longer and more oblique, finger seiTate 

 almost throughout, with about 12 teeth. Peraeopods 1 and 2, 5*^ Joint 

 much shorter than 6*^ finger about ^g length of 6*^ Peraeopods 3 — 5, 2*^ Joint 

 oval, serrate behind. Peraeopod 5, 6^^ Joint rathier longer than 5*^, tapering, 

 with fascicles of setae on hind margin, finger about ^3 as long, stiliform. 

 üropod 3, rami longer than peduncle, lanceolate, subequal in length, but 

 inner much broader than outer, with 3 or 4 spinules on inner margin. 

 Telson nearly twice as long as broad, cleft nearly to base, apices a little 

 dehiscent, bidentate, outer point more produced than inner, a long spine in 

 each notch. Colour pale orange. L. 9 8, d nearly 10 mm. 



Arctic Ocean, North-Atlantic, North-Sea and Skagerrak (whole Norway, depth 

 75 — 564 m; Bohuslän; Scotland; France). 



3. L. macronyx (0. Sars) 1894 Lilljeborgia m., G. O. Sars, Crust. Norway, 

 V. 1 p. 533 t. 188 f. 2. 



Body slender, pleon segmeuts 1, 2 and 4 each produced to a small dorsal 

 tooth. Head, rostral protection well marked, lateral corners slightly produced, 

 obtusely acuminate. Pleon segment 3, postero-lateral corners almost quadrate, 

 produced to a very small tooth. Eyes inconspicuous in spirit. Antenna 1, flagellum 

 nearly twice as long as peduncle, about 12-jointed, accessory flagellum more than 

 half as long, 8-jointed. Antenna 2, ultimate and penultimate joints of peduncle 

 subequal, flagellum less than both combined. Gnathopods 1 and 2 nearly as 

 in L. brevicornis, but finger in gnathopod 1 with-only 3 teeth at base, 

 and in gnathopod 2 with 7 on proximal half. Peraeopods 1 and 2, finger half as 

 long as 6*^^ Joint. Peraeopods 3 — 5, 2^ Joint large and laminar. Peraeopod 5 very 

 long, 6*^ Joint smooth, finger nearly as long, üropod 3, both rami rather 

 narrow, inner the wider, with 3 small spinules on inner margin. Telson 

 very naiTow, nearly thrice as long as broad, cleft nearly to base, apices 

 minutely bidentate, with spinule in each notch. L. 9 6 mm. 



CJiristianiafjord and Trondhjemsfjord. Depth 376 — 752 m. 



4. L. fissicornis (Sars) 1858 Gammarus f., M. Sars in : Forh. Selsk. Christian., 

 p. 147 I 1861 G. f., Iduna f., A. Boeck in: Forh. Skand. Naturf., Mede 8 p. 657 | 



