Monoculudes 265 



about reaching apex of 1*** Joint of autenna 1. Side-plate 1 a little expanded 

 distally. Eyes of moderate size, at base of frontal process. Auteuna 1 

 reacbiug considerably beyond peduncle of antenna 2, 1^* Joint rather longer 

 than 2^, joints of flagellura elongate. Antenna 2, ultimate Joint of peduncle 

 ratber sborter than penultimate. Gnatbopod 1, 2*^ Joint not dilated, process 

 of 5*'! Joint apically narrowed, scarcely reacbing palm of 6*'^ Joint, palm 

 rainutely pectinate and set witb setules and numerous little books. Gnatbopod 2, 

 process of 5*^^ Joint slender and long, yet not quite reacbing palm, wbicb 

 is oblique and furnisbed as in gnatbopod 1, G^^ Joint of uniform widtb. 

 Peraeopods 1 and 2, joints little dilated, finger a little sborter tbau 6*^^ Joint. 

 Peraeopods 3 and 4, 2^ Joint well expanded, the rest not, finger long, nearly 

 straigbt Peraeopod 5, 2*^ Joint broad, narrowed distally, 5*^ ratber longer 

 tban 4^^, G*'' tbau 5^**, finger longer tban 4*^. Telson a little longer tban 

 broad, a little tapering, apical border emarginate more deeply tban usual, 

 lateral angles subacute. Oolour pale tinged witb brown. L. 7*5 mm (not 

 füll grown). 



Arctic Ocean (Greenland). Deptli 19--48 lu. 



14. M. tuberculatus Boeck 186ö Oediceros affinis (part.) (err., non Eruzeliiis 

 1859!), Goes in: Öfv. Ak. Förh., v.22 p.527 t. 39 f. 21 ! 1871 Monoculodes tuberculatus, 

 A. Boeck in: Forli. Selsk. Christian.. 1870 p. 167 | 1876 M. t, A. Boeck, Skand. Arkt. 

 Amphip., V.2 p. 277 t. 15 1.2 | 1883 M. t., J. S. Schneider in: Troms0 3Ius. Aarsh., r. 6 

 p.29 t.l f. 8 I 1892 3/. f., G. 0. Sars, Crust. Norvvay, v.l p.303 1. 107 f. 3 \ 1893 Oediceros 

 nubilatus (part.), A. DellaValle in: F. Fl. Neapel, r. 20 p. 550. 



Ratber stout. Frontal process strongly convex, rostral part large, 

 deflexed, acute, reacbing beyond 1^* Joint of antenna 1. Side-plate 1 distally 

 expanded. Eyes of moderate size, round, brigbt red, at base of frontal 

 process. Antenna 1 witbout tbe plumose setae so comraouly present, 1^* Joint 

 longer tbau 2'*, apex of 2*^ Joint produced uniquely into a setose quadrate 

 lobe or tubercle, flagellum ratber longer tban peduncle, 8-jointed. Antenna 2 

 scarcely longer tban antenna 1, ultimate Joint of peduncle sborter tban pen- 

 ultimate (equal, according to Schneider), flagellum 16-jointed (Boeck), 11-jointed 

 (Sars in flg.). Maxiila 1, outer plate according to Schneider carry ing 7 spines. 

 Gnatbopod 1, process of 5*^'* Joint not reacbing palm, 6*^ Joint oblong oval, rather 

 curved, palm as long as bind margin. Gnatbopod 2 scarcely longer tbau 

 gnatbopod 1, though more slender, process of 5*^ Joint slender, not reacbing 

 palm, 6*^ Joint thrice as long as broad, not widened distally, palm oblique. 

 Peraeopods 1 and 2, 5*^ joint distally widened, finger about ^s lengtb of G^^\ 

 Peraeopods 3 and 4, 2^ Joint broad, 6*^ much longer tban finger. Peraeopod 5, 

 2^ Joint piriform, 4^^ sborter tban 5*^, 5*^ tban 6*^. üropod 3, rami mucb 

 longer tban peduncle. Telson quadrangular, sligbtly tapering, apical margin 

 insinuate, carrying 2 spinules, angles rounded. Colour jellowisb, witb shadows 

 of diffuse orange; ova dark violet. L. 6—8 mm. 



Arctic Ocean and North- Atlantic (Spitzbergen; Greenland: Norway, depth 94 — ■ 

 188 m; Firth of Clyde). 



15. M. norvegicus (Boeck) 1861 Oedicerus n. (pari.), A. Boeck in: Forh. 

 Skand. Naturf., M0de8 p.650 | 1871 Monoculodes n., A. Boeck in:* Forh. Selsk. Christian., 

 1870 p. 164 I 1876 M. n., A. Boeck, Skand. Arkt. Amphip., v. 2 p. 267 t. 14 f . 5 | 1892 

 M. n., G. 0. Sars, Crust. Norway, v.l p. 301 1. 107 f . 1 | 1893 Oediceros tiubilatus (paTt), 

 A. DellaValle in: F. Fl. Neapel, u 20 p. 550. 



Rather short and stout, though somewhat compressed. Frontal process 

 deflexed, rostral apex acute, reacbing beyond 1-^* Joint of antenna 1. Side- 



