Proboloides 1«) 



4. P. gregarius (O. Sars) 1882 Metopa yregaria, G. O. Sars in: Forli. Selsk. 

 'Christian., nr. 18 p. 93 t.4 f. 6, 6 a | 1892 Probolium yreyarium, G. 0. Sars, Criist. Norway, 

 p. 1 p. 245 t. 84 1 1893 Metopa gregaria, Proboloides gregarius, A. Della Valle in: F.Fl. 

 Neapel, v. 20 p. 643, 907, 945; t. 59 f. 62, 63. 



Head, lateral corners iiearl)' rectaugiilar. Side-plate 4 subequal to 2^ and 

 3"^ combiued. Pleon segraent 3, postero-lateral angles somewhat produced. Ejes 

 rounded oval, well developed, dark red. Anteuaa 1, 1^* and 2^ joints subequal 

 in length, flagellum longer than peduncle. Antenna 2, ultimate Joint of peduncle 

 rather shorter than penultimate. Lower lip, inner plates coalesced. Mandibular 

 palp very slight, 3^ Joint minute. Gnathopod 1, 4*^» Joint considerably 

 produced. 5*^'^ and 6*^ joints subequal, palm conv ex, undefined. Gnathopod 2 in Q , 

 6*^ Joint oblong oval, palm crenulate in 2 divisions, oblique, defined by a 

 distinct angle armed with a spinule; in ö much larger, much naiTower in 

 projeetion to length. the bind margin or palm pubescent, nearly straight, 

 interrupted by 2 denticles and ending in a finely serrate apical expansion, 

 finger very long, ciliated on inner margin. Peraeopods 3 — 5, 4*'^ Joint broad, 

 decurrent, in the 5*^ peraeopod greatly; 2^ Joint linear in 3*^, broadly oval 

 in 4^^^, obliquely rounded in ö^'^. üropod 3 rather short and stout, peduncle 

 a little longer than ramus, with 6 spines, 2^ Joint of ramus shorter than 1^'. 

 Telson twice as long as broad, apex acute, 4 spines on each raargin. Colour 

 whitish, pellucid, with orange patches. L. o 5, d 6 mm. 



Xorth- Atlantic (Norway). Depth 75 — 188 ni. 



5. P. calcaratus (0. Sars) 1882 Metopa caicarata, G. 0. Sars in: Forh. Selsk. 

 •(^'hristian., nr. 18 p. 92 t.4 f. 5, 5 a | 1892 Frobolium calcaratum, G. O. Sars, Crust. 

 Norway, r.l p.247 t.85 1893 Metopa bruzelii (pari.), M. caicarata, Proboloides calcaratus, 

 A. Della Valle in: F. Fl. Neapel, u 20 p. 641, 907, 945. 



Head, lateral corners angular in 9 , more rounded in ö . Side-plate 4 scarcely 

 as broad as 2*^ and 3^ combined. Pleon segment 3, postero-lateral angles rather 

 produced. Eyes very large, oval quadrangular, imperfectly developed, bright red. 

 Antenna 1, P* Joint longer than 2^, flagellum little longer than peduncle. 

 Antenna 2, ultimate Joint ofpeduncle rather shorter than penultimate. Gnathopod 1 

 as in P. gregarius. Gnathopod 2 in o , 6*^^ Joint triangulär oval, palm oblique, nearly 

 straight, slightly serrated, deflned by an obtuse angle with 3 spinules, flnger 

 of moderate size; in ö, 6*^ Joint very long, palm nearly as in P. gregarius, 

 but rather concave and without the 2 denticles, finger long and ciliated. 

 Peraeopods 3 — o more robust than in P. gregarius, the 4*'* Joint more strongly 

 decurrent. Uropod 3, peduncle as long as ramus, 5 spines. Telson comparatively 

 shorter and broader, 3 spines on each margin. Colour uniformly whitish, ova 

 reddish. L. Q 5, (5 6 mm. 



North-Atlantic (Norway). Depth 150—282 in. 



6. P. glacialis (Kreyer) 1842 Leucothoe g., Kreyer in: Naturh. Tidsskr., u4 

 p. 159 I 1846- i.^., Kroyer in: Voy. Nord, Orust. t. 22 f. 3a— p [ 1862 Montagua g., 

 Bäte, Cat. Aniphip. Brit. Mus., p. 58 t. 9 f. 3 (inaccnrate) | 1871 Metopa g., A. Boeck in: 

 Forh. Selsk. Christian., 1870 p. 141 j 1887 M. g., H. J. Hansen in: Vid. Meddel., ser. 4 

 f. 9 p. 93 t. 3 f. 6, 6a I 1893 M. g., A. Della Valle in: F. Fl. Neapel, ?7.20 p.639 t.59 f. 54. 



Side-plate 4 not as broad as 2^ and 3*^ combined. Pleon segment 3, postero- 

 lateral corners bluntly subquadrate. P]yes small, round, dark. Antenna 1, l^*^ Joint 

 slightly longer than 2*^, flagellum shorter than peduncle, 10-jointed. Antenna 2 

 scarcely shorter than antenna 1, ultimate Joint ofpeduncle a little shorter than pen- 

 ultimate, longer than 6-jointed flagellum. Maxilla 1, 1^* Joint of palp unusually 



