166 Leucothoe 



of body, 1^^ Joint witli acute apical process, 2'^ narrower, subequal, flagellum 

 about IH-jointed. Anteiina 2 more slender, little shorter, ultiraate Joint of pedimcle 

 aboiit 01" a little more than half length of penultimate, flagellum ö-jointed. 

 Mandible, 3<i Joint of palp more than ^'g leng-th of 2^. Gnathopod 1. process 

 of 5^^ Joint spiniform, inner margin quite smooth, apex slightly curved, 

 6* Joint parallel-sided, inner margin finely serrate, and with a row of curved 

 setules, finger about half its length, slender, curved, Gnathopod 2, process 

 of ö*'^ Joint densely setose, apex serrulate, 6*^* Joint massive, oval, with acute 

 setose apex in front, palm couvex, minutely serrate, rather more strongly 

 near the hinge of finger. Peraeopods 1 — 5 subequal, marginal spinules short, 

 finger small. Peraeopod 5, the oval 2^^ Joint more distinctly serrate than 

 in 3^ and 4*^ pairs. Uropod 3, rami much more than half length of peduncle. 

 Telson thrice as long as broad, uniformly tapering to acute apex. Colour 

 pale flesh-colour with darker transverse bands; ova in pouch grass-green. 

 L. 9 14, d 18 mm. 



Arctic Ocean, North- Atlautic, North-Sea and Skagerrak (Greenland; Noi'way, 

 depth56 — 282m; British Isles; Azores; France); Kattegat; Mediterranean? Sonietimes 

 in Ascidians. 



6. L. comiuensalis Hasw. 1880 L. c, Haswell in: P. Linn. Soc. N. S.Wales, 

 u4 p.261 t. 10 f. 3 I 1884 L. spinicar-pa var., 3Iiers in: Rep. Voy. Alert, p. 312 | 1885 

 L.s.var., Haswell in: P. Linn. Soc. N.S.Wales, ulO p. 101 | 1893 L. s. (part.), A. Della 

 Valle in: F. Fl. Neapel, ».20 p. 653. 



Close to L. spinicarpa (p. 165). Eyes black. Antenna 1 ^4 longer than 

 antenna 2. Maxillipeds, inner plates less broadly truncate, rudimentary outer 

 plates smaller, P*^ Joint of palp more produced on the outer side. Peraeopods ot 

 varying slenderness; peraeopod 5 has the 2^ Joint very broadly oval, the bind 

 margin very convex to the middle or a little below it and then obliquely truncate, 

 the same form of margin being indicated also in peraeopods 3 and 4. 

 Apex of telson moderately acute. Colour varying, brick-red or gi'eenish, 

 sometimes light pink with innumerable minute crimson dots. L. reaching 

 to 12 — 14 mm. 



South-Pacific (New South Wales). In Sponges, Ascidians and other positions. 



7. L. tridens Stebb. 1888 L.t, T. Stebbing in: Rep. Voy. Challenger, «.29 

 p. 777 t. 47 I 1893 L. spinicarpa (part.), A. Della Valle in: F. Fl. Neapel, v.2Q p. 653. 



Side-plate 1 produced forward below, 2*^ much broader than deep, 

 4^*^ foursided, broader below than above. Pleon segment 3, postero-lateral 

 Corners quadrate. Eyes round-oval, dark. Antenna 1, 1^* Joint with small 

 apical tooth, 3*1 half length of 2*^, flagellum very short, accessory flagellum 

 shorter than the very short P* Joint of flagellum. Antenna 2, ultimate Joint of 

 peduncle nearly ^/^ length of penultimate, flagellum of 6 slender joints. 

 Mandible, cutting plates as in L. miersi (p. 165), spines ofspine-row fewer, 3*^ Joint 

 of palp rather more than half length of 2<^. Maxillipeds, outer plates minutely 

 rudimentary. Gnathopod 1, process of S^^^ Joint smooth on inner margin, 

 apex curving round quite to hinge of finger, 6*^» Joint rather broader at base 

 than apex, inner margin finely serrate, finger about ^/g length of 6*^ Joint. 

 Gnathopod 2, apex of 5*^ Joint cut into 5 denticles, 6*^ Joint broadly oval, 

 with no outer apical process, palm with 3 little teeth near hinge of finger, 

 rest of Serratien raicroscopic. Peraeopods 1 — 5, armature slight, finger not 

 very small. Telson scarcely twice as long as broad, apex a little obtuse. 

 L. 5 mm. 



South-Pacific (New Zealand). Depth 2000 m. I 



