260 Monoculodee 



anteuna 1. Side-plate 1 expanded into a lobe in front. Pleon Segments 1 and 2 

 ending dorsally in a median tnbercle, segment IJ with a very liigli gibbons 

 carina. Eyes very large and prominent, oval, at the base of tlie rostrum, 

 separated by the cephalic carina. Anteiinae 1 and 2 sliort. Antenna 1 a little 

 sborter than peduncle of antenna 2, flagellum 5-jointed. Antenna 2, ultimate 

 Joint of peduncle rauch longer than penultimate. Gnathopod 1, process of 

 5*^ Joint broad, 6^^ Joint large, ovate, palm not detined. Gnathopod 2, process 

 of 5*^^ Joint narrow, reaching beyond the bind niargin of 6^'\ which is almost 

 3 times as long as broad, distally widened. Peraeopods 1 and 2 very hirsute, 

 finger short. Peraeopod 5, 2*^ Joint moderately dilated, bind margin serrate. 

 üropods 1 and 2 elongate, rami shorter than peduncle. Colour yellowish white, 

 marbled with tawny red. L. 9 8 mm. 



North-Atlantic (lat. 460 N., long. 7« W.). JDepth 180 m. 



2. M, hanseni Stcbb. 1894 M. h., T. Stebbing in: Bijdr. Dierk., ?;. 17 p.23 t.4. 



Head, frontal process long, hoiizontal, lateral angles little produced, 

 obtuse. Side-plate 1 distally expanded, 'S^ with lower margiu insinuate, 4*'^ with 

 concave bind margin. Last peraeon segment with faint trace of carina. 

 Pleon Segments 1 — 3 discontiuuously carinate; 1^*^ and 2'^ with many adpressed 

 surface spinules. Eyes contiguous, forming an oval prominence at apex of 

 frontal process, leaving a very small deflexed rostral apex. Antenna 1, 1^* Joint 

 reaching beyond cephalic process, 2*^ much longer, flagellum about 11-jointed. 

 Antenna 2, ultimate Joint of peduncle shorter than penultimate. Upper lip 

 with slightly concave margin. Gnathopod 1, 5*'^ Joint with broad process, 

 scarcely reaching the palm of 6^'^ Joint, which is widest at the point where a 

 palmar spine separates the oblique convex palm fi'om the shorter concave 

 bind margin. Gnathopod 2 much longer than gnathopod 1, 5*^ Joint with 

 narrow process, long, but scarcely reaching palm of 6*'» Joint, which widens 

 gradually to the palmar spine, the palm convex, much shorter than the 

 faintly concave bind margin. Peraeopods 1 and 2 very hirsute, 4**' Joint much 

 widened distally, finger smooth, curved, as long as 6*^ Joint. Peraeopods 3 and 4 

 very like 1^* and 2^, except that the 2*^ Joint is piriform, the expansion being 

 almost confined to the upper part, Peraeopod 5, 2*^ Joint oval, other joints 

 slender, with small spines. Uropods 1 — 3, in all peduncle longer than rami, 

 in uropod 3 outer ramus rather shorter than inner. Telson small, a little 

 longer than broad, sides and apex slightly insinuate, some setules on rounded 

 Corners of apical margin. L. Q 21 mm. 



Kara Sea (lat. 72«> X. long. 65» E.; Varna, depth 104 m). 



3. M. longirostris (Goes) 1866 Oediceros l, Goes in: Öfv. Ak. Förli., u22 

 p.526 t.39 f. 20 I 1893 0. l, A. Delhi Valle in: F. Fl. Neapel, «7.20 p.545 t.58 f. 61, 62 | 

 1876 Monoeulodes l, A. Boeck, Skand. Arkt. Amphip., v.2 p. 270 | 1883 M. l, J. S. 

 Schneider in: Tromse Mus. Aarsh., v.d p. 26 t. 1 f . 1 | 1892 M. l., G. 0. Sars, Oust. 

 Norway, v. 1 p. 306 t. 108 f. 3 | 1894 M. l, T. Stebbing in: Bijdr. Dierk., v. 17 p. 24. 



Head, frontal process long, horizontal, and the species in general in 

 close agreement with M. hanseni, but without carina, 1^* Joint of antenna 1 

 not reaching end of frontal process, 2^ Joint not longer than P*, palm of 

 gnathopod 1 shorter than the bind margin, peduncle of uropod 3 shorter 

 than rami, telson with sides slightly convex and apical margin straight. 

 Antenna 2 in cJ with 60 — 70 joints in flagellum (Boeck). Colour semi- 

 pellucid, whitish, rarely (in adults?) with brownish marbling. L. 9 12 mm. 



Arctic Ocean (Spitzbergen, Finmark. Tromsö); Kattegat. Depth 9 — 150 m. 



