Jassa H53 



IAiitenna 2, ultimate Joint of peduncle much louger 

 than penultimate 3. J. ingens . . . . p. 653 

 Antenna 2, ultimate Joint of peduncle not much 

 louger than penultimate — 5. 



iGnathopod 2 in i5, thumb-like process with simple 

 apex 4. J. pulchella . . . p. 654 

 Gnathopod 2 in cJ. thumb-like process with 

 bifid apex 5. J. piisilla . . . . p. 655 



J Peraeopod 4 in cj with joints 4 — 6 narrow ... 6. J. ocius p. 655 



\ Peraeopod 4 in (5 with joints 4 — 6 broad ... 7. J. frequens . . . p. 656 



1. J. dentex (Czern.) 1868 Podocerus d., Czerniavski in: Syezda Russ. Est., 

 Syezda 1 Zool. p. 100 t. 6 f. 35 ] 1880 P. d., Sowinski in: Mem. Soc. Kiew, v. 6 p. 110 

 t,4f.8 I 1899 Jassa d., T. Stebbing in: Ann. nat. Hist., ser.7u3 p.350 | 1893 Podocerus 

 herdmani, A. O. Walker in: P. Liverp. biol. Soc, v. 7 p. 37 f. 13 | 1895 P. h., P. fal- 

 ^atusvar.?, A. ü. Walker in: Ann. nat. Hist., ser. 6 ul5 p. 473 | 1895 P. h., P.f.var.?, 

 A. O. Walker in: P. Liverp. biol. Soc, v.9 p. 314 \ 1893 P. ocius (part.), A. Della Valle 

 in: F. Kl. Neapel, v. 20 p. 448 | 1898 P. c, Sowinski in: Mem. Soc. Kiew., u 15 p. 460 | 

 1894 P. odontonyx, G. 0. Sars, Crust. Norway, v. 1 p. 597 t. 213 f. 2. 



Q. In general like J. pusilla (p. 655). — ä . Head, lateral lobes rather 

 broad, at apex minutely emarginate. Side-plate 1 rather produced f orward, 2<^ twice 

 as broad as deep. Eyes rather large, rounded, brownish er black. Antenna 1 

 about half as long as body; 2*^ Joint as long as 3^, nearly twice as long 

 as 1*^*; flagellum 3 — 5-jointed, accessory flagellum extremely minute. Antenna 2 

 a little longer, more robust; flagellum 3- or 4-jointed. Gnathopod 1 nearly 

 as in J. pulcheila (p. 654) and J. pusilla. Gnathopod 2, 6**^ Joint oblong oval, 

 with a stout tooth close up to the finger-hinge, and another prolonged from the 

 bind margin, with a rather deep cavity between; both teeth sometimes bifid; 

 finger strong and curved, with a variable tooth at middle of inner margin. 

 Peraeopods, uropods and telson seemingly like those in J. pusilla. Colour, 

 variegated with dark brown. L. 3 — 5 mm. 



Arctic Oeean, North-Atlantic and Irish Sea (Trondhjemsfjord and Hammerfest; 

 Colwyn ßay; Liverpool Bay); Black Sea. Depth 1 — 282 m. 



2. J. falcatiformis (Sowinski) 1898 Podocerus f. -\- Ischyrocerus constantino- 

 politanus (ja\.), Sowinski in: Mem. Soc. Kiew., r. 15 p. 461 t. 8 f. 9 — 16: p. 463 t. 8 

 f. 17— 25. 



Adult Q unknown. — ö. Antenna 1, 2^ Joint more than twice as long 

 as 1^*, a little longer than 3*, a little shorter than the 3-jointed flagellum. 

 <jnathopod 2, 6*^ Joint long and rather slender, naiTowing to the finger- 

 hinge, front margin very convex, a slender tooth, fully half the length of 

 the Joint, risiug from the base behind, alongside the sti-aight palm, which 

 is intermpted a little beyond the basal tooth by a Small projecting tooth, 

 apposed to a similar tooth on the inner margin of the finger; finger as 

 long as the 6^^ Joint, with 5 setules on its distal concavity. üropod 3, 

 peduncle long and thick, outer ramus uncinate, distally crenulate with 9 

 small close-set blunt teeth. K 4 mm. 



Bosphorus. Depth 32—36 m. 



3. J. ingens (Pfeff.) 1888 Podocerus l, Pfeffer in: Jahrb. Hamburg. Anst., 

 V.6 p.l31 t.3 f.l I 1893 P. falcatus (part.), A. Della Valle in: F. Fl. Neapel, r.20 p.445. 



Head, lateral lobes bluntly triangulär. Side-plate 1 produced a little 

 forward, 2* broader than deep, 3*^ and 4*^ successively deeper; front lobe 



