Cumacea: 9. Leuconidae, 1. Leucon 



71 



1 -jointed accessory, which in the young male is rudimentary, wart-like (Sars), 

 but not so (Caiman). Peraeopod 3 without peculiar appendages to the 3^ 

 joint, such as are found in some species. Peduncle of uropods rather shorter 

 than exopod which is a little shorter than P* joint of endopod, this being 

 4 times as long as the 2"*^ joint, both joints having more spines than in the 

 9 . most of them small and simple, at least as figured. L. 6 mm. 



OS Portugal, lat. 38o 7' N., depth 1036 m; Davis Strait, lat. 59" 10' N., depth 

 3200 m; off Capri, depths 950— li>00 m; lat. 40" 16' 50" N., long BT^ 05' 15" W., 

 depth 2322 m. 



13. L. kalluropus Stebb. 1912 L. k., T. Stebbing in: Ann. S. Afr. Mus., r.lOv 

 I).156 t. 57 (9). 



Seemingly near to L. longirostris 

 (nr. 12). but with the telsonic segment less 

 produced, the produced portion much instead 

 of little shorter than the base, the proportions 

 and armature of the uropods also differing. 

 Pedigerous segment 5 with procurved ventral 

 spines as in the other species, and the 1- 

 jointed accessory flagellum of antenna 1 

 as long as 1^* joint of the 4 in the principal. 

 Peraeopods 1 — 4 with 2°^ joint distally 

 narrowed. In peraeopods 2 — 5 the S"^ joint 

 is obscure. In the 2'"'^ pair the much spined 

 7*^ joint is as long as the 5**1 and fully 

 twice the 6*^. Peduncle of the uropods a 

 little longer than the 1^*^ joint of the endo- 

 pod, which is more than thrice as long as 

 the 2"'* joint, its medial margin fringed with 

 more than 20 serrate spines following 2 or 

 3 that are setiform, the lateral margin 

 carrying 8 feathered spines; the 2""^ joint 

 has 8 serrate spinules on the medial margin ; 

 the exopod is a little shorter than 1^*^ joint 

 of endopod, and has various elongate spines. 

 L. d about 5 mm, Q unknown. 



Fig. 3R. 

 S. Africa, Cape Natal N. by E. 24 miles, -^ kalluropus (cj) Stebbing, telsonic seg- 

 depth 805 m. ment and uropod. 



14. L. pallidus 0. Sars 1865 L. p., G. 0. Sars in: Forh. Selsk. Christian., 

 1864 p. 182 I 1873 L. p., O. O. Sars in: Svenska Ak. Handl., n. ser. v. U nr. 6 p. 8 t. 3 

 f. 10 I 1879 L. p., A. M. Norman in: Ann. nat. Hist., ser. 5 v.S p. 72 | 1886 L. p., G. O. 

 Sars in: Norske Nordhavs-Exp., v.6 nr. 15 p. 19 | 1894 L. p., A. M. Norman in: Ann. 

 nat. Hist., ser. 6 v. 13 p. 275 | 1900 L. p., G. 0. Sars, Crust. Norway, v. 3 p. 33 t. 25 \ 

 1900 L.p., Zimmer in: Fauna arctica, v. I p. 417, 432, 437 | 1905 L.p.(?), Caiman in: 

 Sci. Invest. Fish. Ireland. 1904 app. 1 p. 19 | 1908 L.p., Zimmer in: Ergeb. Tiefsee-Exp., 

 V.8 p. 178 I 1911 L.p., Stappers in: Camp. arct. Orleans, Crust. Malac. p. 106 t. 4 f. 9. 



Slender, much compressed. Pseudorostral lobes in g long, horizontal, 

 tapering to obtusely acuminate apex, antero-lateral corners acute, preceded 

 by a deep sinus, followed by serration of lower margin for some distance; 

 in d lobes much shorter, with lower margin serrate and antero-lateral corners 

 rounded off. Carapace with dorsal carina denticulate in both sexes, with 



