448 Ipliigenella, Pandorites 



outer rauiiis sliorter tban inner, eacli with several spines at apex. Uropod 3 

 projecting much beyond tbe others, outer ramus nearly tbrice as long as 

 peduucle, with 2 sets of spines ou outer, 3 on inner margin, 2*^ Joint spiniform, 

 almost as large as the little inner ramus. Telsou nearly twice as long as broad, 

 lobes little taperiug or divergent, each with 3 spinules on the obtuse apex. 

 L. 9 mm. 



Caspian Sea. Sometimos on Astacus leptodactylus, probably semiparasitic. 



37. Gen. Pandorites 0. Sars 



1895 Pandorites (Sp. typ.: P. podoceroides) {Pandora (doii Briiguiere 1797, 

 Mollusca!) O. Grrimin in MS.), G. O. Sars in: Bull. Ac. St.-Petersb., ser. 5 i'. 3 p. 287. 



Body little compressed, smooth, pleon Segments 4 — 6 short and stout, 

 with a few dorsal hairs and spinules. Side-plate 4 the largest, only slightly 

 emarginate. Eyes on lateral lobes of head. Antennae 1 and 2 slender, 

 Short, egual, antenna 1 with accessory flagellum. Upper lip rounded. Lower 

 lip without inner lobes, and mouth-parts in general as in Gammarus (p. 460). 

 Gnathopods 1 and 2 alike in ö and in Q , very unequal, in gnathopod 1 

 6*^ Joint small, ovately piriform, in gnathopod 2 very large, expanding to 

 the long, oblique palm. Peraeopods 1 — 5 not very long. Peraeopod 5, 

 2* Joint much expanded, with produced lobe at lower hind corner. Uropod 3 

 very small, outer ramus short, its 2^ Joint minute, inner ramus scale-like. 

 Telson short, cleft to the base. 



1 species. 



1. P. podoceroides 0. Sars 1895 P.p., G. 0. Sars in: Bull. Ac. St.-Petersb., 

 ser. 5 V. 3 p. 287 t. 19. 



In form resembling a species of Ischyrocerus (p. 657), slender, 

 witb broadly rounded back. Head with angular front slightly projecting, 

 lateral lobes evenly rounded, prominent; post-antennal corners acute, 

 curving forward. Side-plate 1 small, narrowing distally, more setose than 

 the rest, 4*^ almost Square, but with convex lower and slightly concave hind 

 margin, Pleon segments 2 and 3, postero-lateral corners smooth, quadrate. 

 Eyes close to margin of lateral lobes of head, oval, dark. Antenna 1, 1^* Joint 

 longer than 2*^ and 3^ combined, 2*^ scarcely twice as long as 3*^, flagellum not quite 

 as long as peduncle, 7-jointed, accessory flagellum small, 4-jointed. Antenna 2, 

 ultimate Joint of peduncle shorter than penultimate, flagellum 5-jointed. 

 Gnathopod 1 setose, 5*** Joint short, cup-shaped, 6*^ rather tumid, palm 

 scarcely defined except by the palmar spines. Gnathopod 2 less setose, 

 2^ Joint with very convex hind margin, 5*^ Joint short. with short and narrow 

 setiferous lobe, 6*^ somewhat flattened, palm longer than hind margin, much 

 curved, very oblique, its edge sharpened and fringed with setules; of the 

 palmar spines one very slender and long, finger long and falciform. Peraeo- 

 pods 1 and 2 very setose, 1^* rather the longer. Peraeopods 3 — 5 rather 

 strong, not elongate, 2^ Joint in peraeopod 3 oblong oval, in peraeopod 4 

 longer, scarcely broader, narrowing distally, with sinuous hind margin; 2^ Joint 

 in peraeopod 5 greatly expanded, widest below the middle, the obscurely 

 serrate hind margin unarmed, its lower lobe not greatly produced downward, 

 front margin densely setose below. Uropods 1 and 2 rather short and stout, 

 rami subequal, each with apical spines, also 1 lateral spine, except on outer 

 ramus of uropod 2. Uropod 3 reaching little beyond the others, outer ramus 

 scarcely longer than peduncle, with 1 lateral and 2 apical spines, the tiny 



