Jassa 656- 



with distal tooth near finger-hinge; the short bind margiu eiiding in fuUy 

 adult (5 in a long tooth (in younger 6 a denticle nearer the distal than 

 the proximal end of the Joint), ornamented on the outer side with tufts of 

 setae, its apex overlapped by that of the long slightly sinuous finger; inner 

 margin of finger sometimes on proximal half minutely tuberculate. Gnatho- 

 pod 2 in 9 much larger than gnathopod 1, irregulär oval, or long piriform,. 

 bind margin very short, the long palm having a distal tooth near the finger- 

 hinge, thence passing with a long excavation to 2 prominences, of which 

 the 2'^ is beset with 3 palmar spines, among which the apex of the long 

 serrate finger impinges. Peraeopods 1 and 2 rather short and stout, 2*^ Joint 

 a little expanded, 4*** distally widened. Peraeopods 3 — 5 successively longer, 

 2*1 Joint oval. Uropod 3, outer ramus uncinate, with 2 teeth on upper distal 

 margin. Telson very small, triangulär, with 2 setae on each side of the 

 acute apex. Colour, brown or red patches, of various shapes and sizes. 

 L. 5 — 10 mm. 



Atlantic with adjoining seas (Europe from Trondhjemsfjord to Naples; Azores; 

 Rio Janeiro); Southern Indian Ocean (Kerguelen Island); Pacific (Philippines; Port 

 Jackson [East-Australia'] ; lat. 430 S., long 8^» W.). 



5. J. pusilla (0. Sars) 1876 Podocerus falcatus (part.), A. Boeck, Skand. Arkt. 

 Amphip., V.2 p. 605 t. 28 f . 2 | 1893 F. f. (part.), A. Della Valle in: F. Fl. Neapel, v. 20 

 p.445 I 1895 P.f.var.?, A.O.Walker in: Ann. nat. Hist., ser.6 tJ. 15 p.473 | 1882 F. mi- 

 nutus (non Ischyrocerus m. W. Lilljeborg 1855!), G. 0. Sars in: Forh. Selsk. Christian.^ 

 nr. 18 p. 112 t. 6 f. 6, 6 a | 1894 F. pusillus, G. 0. Sars, Crust. Norway, v.l p. 596 

 t. 212 f. 1. 



In general like J. pulchella, but shorter and stouter. Head, lateral 

 lobes rather broad and angular in front. Side-plate 1 in d rather sharply 

 produced, b^^ nearly as deep as 4**^. Pleon segment 3, postero-lateral 

 Corners simply quadrate. Eyes rather large, rounded, dark brown. An- 

 tenna 1, 3^ Joint about twice as long as 1®*, as long as 2^, rather shorter 

 than the 5-jointed flagellum. Antenna 2 rather longer, more robust, but not 

 very stout; flagellum slender, 4-jointed, fascicles of setae not plumose» 

 Gnathopod 2 in adult Ö differing from that of J. pulchella in that the 

 basal tooth of 6*^* Joint is much shorter and broader and has a distinctly 

 bifid apex. Gnathopod 2 in 9 , 6*^ Joint more regularly oval, palm less^ 

 strongly sinuous, defined by a very slight angle, the 2 prominences much 

 smaller and less widely separated than in J. pulchella. Peraeopods 1 — 5 

 more slender, less densely setiferous. Uropod 3, outer ramus less coarsely 

 hooked. Telson small, acutely produced at apex. Colour, variegated with. 

 jn*egular patches of brown. L. about 5 mm. 



Arctic Ocean, North-Atlantic, North-Sea, Irish Sea and Skagerrak (South- and 

 West-Norway, depth 37 — 188 m, on hydroids; British Isles; France). 



6. J. oeius (Bäte) 1862 Fodocerus 0., Bäte (& Westwood), Brit. sess. Crust., 

 V. 1 p. 450 f. I 1862 F. 0., Bäte, Cat. Amphip. Brit. Mus., p. 257 t. 44 f . 5 | 1866 P. o.^ 

 üam. Heller in: Denk. Ak. Wien, u26n p.45 | 1868 F. 0., Czerniavski in: Syezda Russ. 

 Est., Syezda 1 Zool. p. 99 | 1881 F. 0., Nebeski in: Arb. Inst. Wien, v.3 p. 152— 154 

 1. 13 f. 43 I 1893 F. 0. (part.), A. Della Valle in: F. Fl. Neapel, ^.20 p. 448 1. 14 f. 11—27 | 

 1895 F.O., A.O.Walker in: Ann. nat. Hist., ser.6 v.l6 p.473 | 1895 F. 0., A.O.Walker 

 in: P. Liverp. biol. Soc, v.9 p. 316. 



In general like J. pulchella, but distinguished by the gnathopod 2 

 in d and 9 , and uropod 3. Antennae 1 and 2 rather slender. Antenna 1, 



