Metopella 



183 



with denticle at lower bind corner, 4^'^ much larger than 2'^ and 3^ combined. 

 Pleou Segment 3, postero-lateral angles subacute, segment4 cariuate, overavcbing 

 Segment 5. Eyes small, round. Autemia l, 1^* Joint completely overbipping 2^, 

 flagellum 8-jointed. Antenna 2 rather sborter tban antenna 1, ultimate andpenulti- 

 mate joiuts of peduncle subequal, flagellum 7-jointed. Maxilla 1, palp 2-jomted. 

 Maxillipeds, inner plates separate. Guatbopod 1 feeble, 4*^ Joint sborter tban 5*^ 

 6*^^ Joint as long as 5*^, almost linear. Gnatbopod 2 of moderate size, 5^'^ Joint 

 cup-like, 6*^ oblong triangulär, widening distally, palm a little oblique, coarsely 

 sen'ate, defined by a tootb and 2 spines. Peraeopods 1—5 very slender, 

 none of tbe joints expanded. Uropod 3, peduncle armed with 1 spine, 

 2 joints of ramus subequal. Telson uarrow, linguiform, obtuse at apex, quite 

 unarmed (Sars) or with 2 lateral spines. L. o 3 — 4 mm. 



Arctic Ocean, North-Atlantic and North-Sea (Xorway, depth 94 — 18« m ; ?CTreenland, 

 depth 72 m; Firth of Clyde; Firth of Forth; Moray Firth). 



2. M. nasutigenes (Stebb.) 1888 Metopa n., T. Stebbing in : Rep. Voy. Challenge r 

 ^;. 29 j). 753 t. 40 j 1898 M. nasuta (part.), Froboloides nasiifigenes, A. Delhi Valle in: 

 F. Fl. Neapel, v. 20 p. H37, 907. 945. 



Body compact and firm. Feraeon segment 4 mucb the largest, slightly 

 angled dorsally, not cariuate. Head. lateral corners little produced. Side- 

 plate 2 with seiTation of 4 points at bottom of bind margin, 4^^ rauch larger 

 than 2*^ and 3*^ combined. Pleon segment 3 almost quadrate, segment 4 with 

 slight dorsal depressiou. Eyes round, not large. Antenna 1, 1^* Joint acutely 

 produced beyond 2"^, 2** longer than 3^ flagellum 10-jointed. Antenna 2 

 rather sborter than antenna 1, ultimate Joint of peduncle rather longer than 

 penultimate, flagellum 8-jointed. Maxilla 1. palp 2-jointed. Maxillipeds, inner 

 plates separate. Gnatbopod 1, 4*^ Joint as long as 5*^ 5*^ much sborter 

 than 6*^^ almost cup-like, 6*'^ almost oblong, subchelate, with oblique, finely 

 pectinate palm, defined by an obtuse angle and spines. Gnatbopod 2 not 

 very unlike gnatbopod 1, but larger, 4*'' Joint shorter than the cup-like 5*^, 

 6*^ 3 times as long as broad. almost parallel-sided, palm almost smooth, 

 defined as in gnatbopod 1. Peraeopods 1 — 5 very slender, none of the 

 joints expanded. Uropod 3, peduncle armed with 1 spine, 1^* Joint of ramus 

 armed with 3 spines, rather louger than 2*^ Joint. Telson long, with uptiirned 

 sides, apex acute. L. o 4-5 mm. 



Cumberland ßay [Kerguelen Island]. Depth 222 m. 



3. M. ovata (Stebb.) 1888 Metopa o., T. Stebbing in: Rep. Voy. ('hallenger, v. 29 

 p. 764 t. 44 I 1893 M. o., Metopoides ovatus, A. Della 

 Valle in: F. Fl. Neapel, v. 20 p. 645, 907, 938. 



Head. lateral corners 



little produced. Pleon 



segment 3, postero- 

 lateral corners sub- 



quadrate. Side-plate 2 



completely coveriug the 



1 ^t, 4*^ much larger tban 



2^ and 3*^ combined, 



completely coveriug 5 '^''. 



gth aud 7th (Fig. 47). 

 Eyes round. Antenna 1, flagellum longer than peduncle, 10-jointed; a rudi- 

 mentary 2-jointed accessoiy flagellum, as in Metopoides (p. 185). Antenna 2 



Fig. 47. M. ovata. 

 Lateral view, $ . 



Fig. 48. M. ovata. 

 Peraeopod 2. 



