Lembos 595 



Eyes and eye-pigment entirely wauting. Antennae 1 and 2 broken. Man- 

 dible, 3^ Joint of palp longer than 2*^, distal margin concave. Gnathopod 1 

 in d, 2^ Joint stout except proximally, 5^^ and 6**^ neaiiy equal in width 

 and length, palm towards the middle emarginate and raised into a strong 

 tooth, finger shorter than 6*^ Joint but much oveiiapping palm. Gnatho- 

 pod 2 in d much smaller, 2*^ Joint little dilated, 6*^ Joint rather larger 

 than 5*^, finger a little overlapping the palm. Gnathopod 1 in Q , 2^ Joint 

 not dilated, 6*^ wider than 5*^, palm very oblique and ill-defined. Gnatho- 

 pod 2 in 9 nearly as in d, but shorter, palm more transverse. Peraeopods 

 1 and 2 slender, little setose, 2*^ — 5*^ joints glandulär, finger long, as 

 long as 6^^^ Joint. Peraeopods 3 — 5, 2*^ Joint oval; peraeopod 5 elongate. 

 Uropod 3, rami nearly equal, little longer than peduncle. Telson rounded 

 oval, with setules at each lateral process. L. about 6 mm. 



Bay of Biscay. Depth 950 m. 



2. L. arcticus (H. J. Hansen) 1887 Microdeutopus a., H. J. Hansen in : Dijmphna 

 Udb., p. 231 t. 22 f. 3 | 1894 M. a., T. Stebbing in: Bijdr. Dierk., v. 17 p. 43 | 1893 .4«- 

 tonoe arctica, A. Della Valle in: F. Fl. Neapel, v. 20 p. 406 t. 56 f. 35, 36 | 1895 Lembos 

 arcticus, T. Stebbing in: Ann. nat. Hist., ser. 6 v. 16 p. 207. 



Side-plate 1 rather smaller than 2'^, its apex acute, not aculeate, 

 2d — 4th rotundo-quadrate, 5**» nearly as deep as 4*^ vv^ith shallow straight 

 hind lobe. Pleon segment 3, postero-lateral corners quadrate, in 4*'^ produced 

 to a small tooth. Eyes very small. Antenna 1 not reaching end of 3<^ 

 pleon Segment, 2*^ Joint longer than 1^*, 3^ short, flagellum much longer 

 than peduncle, 35-jointed; accessory flagellum 7-jointed. Antenna 2 about 

 ^2 as long as antenna 1, ultimate Joint of peduncle shorter than penultimate, 

 but at least as long as the 7-jointed flagellum. Mandible, 3*^ Joint of palp 

 considerably longer than 2^. Maxillipeds, outer plates much smaller than 

 is usual in the genus. Gnathopod 1, ö**^ Joint shorter than 6^\ rather broad 

 except at base, hind margin setose, 6*^ with groups of setae on distal half 

 of front, and along hind margin, widening to and at the convex transverse 

 palm, this being sharply defined by a small acute tooth, which is crossed 

 by the apex of the finger. Gnathopod 2, 5*^ Joint setose, wider but rather 

 shorter than the narrowly oblong and very setose 6^^, which has a short 

 transverse palm, overlapped by the denticulate, spinulose finger. Peraeopods 

 1 and 2 rather slender, 4*^ Joint rather longer than 5*^ 6*^* longer than 5*^ 

 and much more slender, finger slender, acute. Peraeopods 3 — 5, 2*^ Joint 

 very narrow; peraeopod 4 much longer than 3*^, 5*^ than 4*^. Uropods 1 

 and 2, rami equal in length, in uropod 2 one stouter than the other. 

 Üropod 3, peduncle short, pentagoual; inner ramus a little longer than 

 the outer. Telson, upper half semicircular, low er triangulär, with strong 

 prominence on each side of the base of the triangle, canying 3 unequal setules. 

 Colour whitish, with 4 longitudinal rows of brown grey blotches. L. 29 mm. 



Kara Sea (lat. 70° N.). Depth 37—96 m. 



3. L. spiniventris (Della Valle) 1893 Autonoe s., A. Della Valle in: F. Fl. 

 Neapel, u 20 p. 400 t. 5 f. 7; t. 56 f. 17— 34 [ 1895 Lembos s., T. Stebbing in: Ann. nat. 

 Hist., ser. 6 v. 16 p. 207. 



Body moderately robust, peraeon segments 1 and 2 narrow, ventral 

 surface of peraeon armed with many large spines (only in d ?). Head short 

 with straight, very acute- rostrum. Side-plate 1 in d, front angle very 

 acutely prolonged, in 9 subacute, in side-plate 2 in d acute, not much 

 prolonged, in 9 blunt; side-plate 5 notably less deep than 4*^^. Eyes brown. 



