258 Monoculopsis, Monoculodes 



antenna 2, 3^ Joint long, flagellura short. Upper lip rounded quadrangular 

 Lower lip with inner lobes separate. Mandible, molar well developed, palp 

 slender, 3*^ Joint shorter than 2*^. Guathopod 1, process of 5*^ Joint very 

 large, projectiug. Gnatbopod 2 slender, process of 6^^ Joint long, slender, 

 6*'' elongate, tapering distally. Peraeopods 1 — 4 short. stout, very birsute. 

 Uropods and telsou as in Monoculodes (p. 258). 



1 species. 



1. M. longicornis (Boeck) 1871 Monoculodes i, A. Boeck in: Forh. Selsk. 

 Christian., 1870 p. 165 | 1876 M. l, A. Boeck, Skand. Arkt. Amphip., v.2 p. 273 t. 16 

 f.2 1 1883 M.l, J.S.Schneider in: Tromsö Mus. Aarsh., v.6 p.24 1. 1 f.7; t.3 f. 18, 23 | 

 1892 Monoculopsis l, G. O. Sars, Crust. Norway, v.l p. 311 t. 110 f. 1 1 1893. Oediceros 

 affinis (part.), A. DellaValle in: F. Fi. Neapel, v.2Q p. 548. 



Tumid in fi'ont. Head, rostrum very short, triangulär, lateral corners 

 subrectangular. Side-plates 1 — 3 small, 4*^ as large as 1^* — 3"^ combined, 

 b^^ still broader, not so deep. Eyes rounded, light red with wbitish coating. 

 Antenuae 1 and 2 densely setose. Antenna 1. 2<^ Joint much longer than 1***' 

 3*^ subequal to l^*, and to 8-joiuted flagelluni, Antenna 2 in o a little shorter 

 than antenna 1, ultimate Joint of peduncle longer than penultimate, flagellum 

 shorter than those 2 combined. Gnatbopod 1 not strong, process of h^^ Joint 

 narrowly linguiform, reaching beyond bind margin of oblong oval 6*'\ wbich 

 has palra very oblique, subequal to bind margin. Gnatbopod 2 long, slender, 

 process of 5*'' Joint stiliform, reaching beyond palm, 6**' Joint nearly 5 times 

 as long as broad, distally naiTowed, palm small, oblique, well defined. 

 Peraeopods 1 and 2, 4*'^ Joint rather expanded, as long as 5*^^ and 6*^ combined, 

 finger small. Peraeopods 3 and 4 not long, 2*^ Joint much expanded, A^^ broad, 

 tinger short and broad. Peraeopod 5 long, 2^ Joint broadly oval, 4^^ and 5*^ sub- 

 equal, 6t'i and 7^'* subequal. üropod 3, rami narrowly lanceolate, spinuli- 

 ferous, a little longer than peduncle. Telson little longer than broad, 

 slightly narrowed to slightly insinuate apical margin. Colour wbitish, pale 

 brownish violet on back. L. 9 mm. 



Arcfcic Ocean, North-Atlantic and North-Sea (Haugesund to Vadsö [Norway], 

 depth 18—36 m; .7 an Mayen). 



17. Gen. Monoculodes Stimps. 



1853 Monoculodes (Sp. im.: M. demissus), Stimpson in: Smithson. Contr.. v.6 

 nr. 5 p. 54 1 1892 M., G. 0. Sars, Crust. Norway, v.l p. 294 | 1857 Kröyera (Sp. uu.: 

 K. carinata), Bäte in: Ann. nat. Hist., ser. 2 u 19 p. 140 | 1858 Kroyera, Bäte in: Nat. 

 Hist. Northumb., v. 4i p. 15 | 1862 Kroyea, Bäte, Cat. Amphip. Brit. Mus., t. 17 | 

 1864 Kroyeria, E. Grube, Lussin, p. 72 | 1871 Kr0yeria, A. Boeck in: Forh. Selsk. 

 Christian., 1870 p. 171. 



Head produced to a rostrum, wbich is usually deflexed, acute. Side- 

 plates 4 and 5 rather large. Eyes almost always contiguous, at base of rosti'um. 

 Antenna 1 generally much shorter than antenna 2, flagellura of latter 

 in ö filiform. Mandible, molar with triturating surface. Maxiila 1, with 

 9 (6?, 7?) spines on outer plate. Gnatbopod 1 (Fig. 65) usually shorter 

 and stouter than gnatbopod 2 (Fig. 66), 5**^ Joint of latter produced into 

 a long slender process. Peraeopods, uropods and telson nearly as in 

 Oediceros (p. 243). 



18 species accepted, 1 obscure. 



