Neoniphargns, Niphargus 405 



cup-shaped, distally very wide, 6^^ nearly Square, hind margin rugose, palm 

 transverse. minutely denticulate. Uropods 1 aud 2 reach nearly as far back 

 as uropod 3. üropod 3, outer ramus rather longer than peduncle. Telson 

 as broad as long, cleft to centre, apices broad, each carrying 4 spinules. 

 Colour whitish yellowish to brown. L. 6 mm. 



Tasniania (swampy ground near top of Mount Wellington about 1200 m). 



N. luoniezi (Wrzeän.) 1889 Gammarus putea?ius (err., nou C.L.Koch 1835!), 

 3Ioniez in: Rev. biol. Nord France, v. l p. 245 | 1890 Niphargus moniezi, Wrzeäniowski 

 in: Z. wiss. Zool., v.bO p. 672, 675, 676 | 1899 N. m., Neoniphargus (part.)/, T. Stebbing 

 in: Tr. Linii. Soc. London, ser. 2 ii.l [). 425. 



Ej^es wautiug. Gnathopods, 1 and 2, 6tli Joint oval. Uropod 3 short, inner 

 lainus represeuted by a scale, oval, broad, „replice", without apical spines or setae, outer 

 raraus 1-jointed. Telson double. Ij. 6 — 7 mm. 



North of France. Subterraueau waters. 



21. Gen. Niphargus Schiödte 



1849 Niphargus (Sp. un.: N. stygius). Schiödte in: Danske Selsk. Skr., ser. 5 v.2 

 p. 26 i 1890 N., Wrzeäniowski in: Z. wiss. Zool., i?. 50 p. 620 i 1893 N, A. Della Valle 

 in : F. Fl. Neapel, v. 20 p. 704 | 1894 N., Chilton in : Tr. Linn. Soc. London, ser. 2 u. 6 p. 165. 



Body compressed, not carinate. Side-plates 1—4 not large. Eyes 

 rudimentary oi* wanting. Antenna 1 the longer, accessory flagellum not 

 raore than 2-jointed. Upper lip rounded. Lower lip, inner lobes well developed. 

 iMandible normal. 3* Joint of palp longer than 2^. Maxiila 1, inner plate 

 with few (2 or 3) setae, outer with 7 spines, palp of right and left maxilla 

 alike in foi*m. Maxilla 2, inner plate not or very slightly fringed aloug 

 inner margin. Maxillipeds. outer plates not very broad, fringed with spine- 

 teeth on inner margin, palp elongate. Gnathopods 1 and 2 similar, subchelate, 

 ö^^ Joint less wide than 6*'', 6*^^ Joint dilated, finger with nail. üropod 3, 

 outer raraus long, 2-jointed, inner very small. Telson more or less deeply cleft. 



10 species accepted, 10 doubtful. 



Synopsis of accepted species: 



I ( Accessory flagellum ot antenna 1 with 2 joints — 2. 

 \ Accessory flagellum of antenna 1 with only 1 Joint — 8. 



/ Antenna 1 longer than the body; telson diifering in 



) (5 and 9 1. N. ci'oaticus . p. 406 



I Antenna 1 not longer than the body; telson not 

 ' differing in <S and $ — 3. 



Pleon Segment 2, postero-lateral corners rounded, in 



Segment 3 acute 2. N. forelii . . p. 406 



Pleon Segments 2 and 3, postero-lateral corners more 



or less rounded — 4. 

 Pleon Segments 2 and 3, postero-lateral corners acute 



or qnadrate '■ — 5. 



j Side-plates 1 — 4 not deeper than side-plate 5 . . . 3. K". aquilex . . p. 406 

 ) Side-plates 1—4 deeper than side-plate 5 4. N. stygius . . p. 407 



f (xnathopods 1 and 2, 6tli Joint broader than long — 6. 

 ) Gnathopods 1 and 2, 6th Joint longer than broad — 7. 



J With eyes 5. N. puteanus . p. 407 



\ Without eyes 6. N. virei . . . p 408 



