626 Leptocheirus 



iSide-platel, lower front Corner stronglyproduced 5. L. dellavallei .... p. 628 

 Side-plate 1, lower front corner not strongly 

 produced 6. L. peetinatus . . . . p. 629 



iPleon Segment 4, teeth sraall; colour tawny 

 with dark spots 7. L. guttatus p. 629 

 Pleon Segment 4, teeth large; colour yellow 

 with dark bands 8. L. tricristatus . . . p. 629 



1. L. cornuaurei Sowinski 1898 L. c, Sowinski in: Mem. Soc. Kiew, v.\b 

 p. 470 t. 9 f. 9—22. 



9 unknown. — ö . Side-plate 1 oblong, with rounded margin, 2* large, 

 distally much widened and outdrawn. Antenna 1, 2^ Joint much longer 

 and naiTOwer than 1^*, 3*^ more than ^3 as long as 2^; flagellum and accessoiy 

 flagellum missing. Antenna 2, flagellum ^3 longer than ultimate Joint of 

 peduncle, of 12 joints, the last rudimentaiy. Mandible with spine-row of 6 spines. 

 Maxiila 1 with a Single seta on inner plate. Gnathopod 1 thicker and longer 

 than gnathopod 2; 2^ Joint comparatively short and strong, narrowed at base, 

 (in figure without setae on front margin), 4*^ much narrower than 3^, 5*^ stout, 

 not twice as long as broad, a little shorter and naiTower than the oblong 6*^, 

 which also is not twice as long as broad; palm rather oblique, not strongly 

 defined, matching the stout finger; joints 3 — 5 densely setose on bind margin, 

 but 6*^ Joint not densely. Gnathopod 2 of much the same structure as in 

 L. guttatus (p. 629); A^^ Joint subequal in length to the tapering 6*, which is 

 only slightly shorter than the 5*^; all with the usual armature; finger small. 

 Peraeopods 1 and 2, 6**^ Joint a little shorter and much naiTOwer than 4**^, 

 finger half as long as 6*^. Peraeopods 3 — 5, 2^ Joint well expanded, in 

 peraeopod 3 narrowed distally; 6*^ Joint longer than 4*^ finger short. Uropod 2, 

 rami with few spines; in uropod 3 both rami ending with a group of setae. 

 Telson broader than long, the apical margin concave, crenulate, with 2 pairs 

 of setules. L. 5 mm. 



Bosphorus (Golden Hom [Constantinople]). 



2. L. aberrans (Ohlin) 1895 Protomedeia a., Ohlin in: Acta Univ. Lund., u 31 

 nr. 6 p. 53 f. 7—14. 



Body slender, but back tolerably broad, rounded. Head, lateral corners 

 produced, subacute. Side-plate 1 as deep as 2^ but only half as broad, 

 2* larger than 3*^ or 4*^ 6^^ with front lobe little deeper than bind one. 

 Pleon Segment 3, postero-lateral corners produced into a small acute tooth. 

 Eyes appai-ently absent. Antenna 1 longer than 2*^, longer than half the 

 body; 1^* Joint a little shorter than 2^, 3*^ about ^s leng-th of 2^; flagellum 

 rather longer than peduncle, 11-jointed; accessoiy flagellum absent. Antenna 2 

 ^/^ — Vs shorter than antenna 1; antepenultimate Joint of peduncle broad» 

 ultimate and penultimate joints equal and together as long as the 5-jointed 

 flagellum. Gnathopod 1, 2*^ Joint shorter than 5*^ and 6*^ combined, ihnged 

 on front margin, 3^ bulging behind, with very long subapical setae, 4*^ not 

 longer than 3*^, 4*^ — 6*^ fringed on bind margin, 6*^ as long as 5*^ a little 

 wider, narrowly oblong; the short palm nearly transverse, a little overlapped 

 by the finger. Gnathopod 2, 2*^ Joint fringed on front with very long setae, 

 5*^ considerably longer than 6*^ 6*^ with palm very oblique, ill-defined 

 except by a palmar spine; finger smooth, rather stout, as long as palm. 

 Peraeopods 1 and 2, finger long, acute, as long as 6**^ Joint Peraeopod 6 

 the longest, nearly as long as body, 2*^, 4*^^ and 5*^ joints equal, 6*^ nearly 



