Gammaridarum species incertae sedis 513 



G. flabellifer Stimps. 1855 G.f., Stimpson in: P. Ac. Philad., v.l p.382| 

 1862 G.f., Bäte, Cat. Ampliip. Brit. Mus., p. 222 | 1893 G. locusta (part.)?, A. Della 

 Valle in: F. Fl. Neapel, i\ 20 p. 766. 



Slender, smooth posteriorly. Eyes small, round, black. Antenna 1 half as long 

 as body, flagellura 20-jointed, accessory flagellum 5-jointed. Gnathopods 1 and 2, 

 6tl> Joint oblong elliptic, with a fiisiform area below surrounded by short setae. Uropod 3, 

 rami long, lamelliform, elliptical, equal, spreading like a fan. L. 12 mm. 



North-Pacific (Loo Choo Islands). 



G. fontinalis A. Costa 1883 G.f., A. Costa in: Atti Acc. Napoli, ser. 2 v.l 

 nr.2 p.82, 106 | 1884 G.f, A. Costa in: Bull. Soc. ent. Ital., y. 15 p. 340 | 1893 G.f, 

 A. Della Valle in : F. Fl. Neapel, v. 20 p. 766. 



V'ery near to Carinogammarus roeselii (p. 506) ; diifers by want of the dorsal 

 spines of the pleon segments 4 — 6, these only on the posterior margin presenting a 

 few backward directed spinales. 



Sardinia. In a spring. 



G. minus Say 1818 G. m., Say in: J. Ac. Philad., ^. lii p. 375 \ 1840 G. fasciatus 

 (part.)?, G. minhnus (laps.), H. Milne Edwards, Hist. nat. Crust., v.'d p. 46. 

 United States of America. In brooks under stones. 



G. peloponnesius Guer. 1832 & 35 G.p., G. peloponnesiacus, Guerin(-]yiene- 

 ville) in: Exp. Moree, t;. 3i sect. 2 p. 45; Atlas p. 3 Zool. t. 27 f. 5 | 1888 G. peloponnesius, 

 T. Stebbing in: Rep. Voy. Challenger, u 29 p. 147 | 1893 G. locusta (part.), A. Della 

 Valle in : F. Fl. Neapel, v. 20 p. 760. 



Pleon Segment 5 with stiff dorsal spinules. Eyes reniform. Antenna 1 shorter 

 than antenna 2, the latter with calceoli. Gnathopods 1 and 2 subequal, subchelate. 

 Peraeopods 1 — 5 rather long, equal. L. 13— 16 mm. 



Greece. 



G. podurus Abildg. 1789 G.p., Abildgaard in: O.F.Müller, Zool. Dan., ed. 3 

 V.3 p. 59 t. 116 f. 1—6 i 1872 G.p., A. Boeck, Skand. Arkt. Amphip., v.l p. 38 | 1793 

 Cancer (Gammarellus) p., J. F. W. Herbst, Naturg. Krabben Krebse, v.2 p. 119 t. 35 

 f. 6 I 1830 Ämphithoe podura, H. Milne Edwards in: Ann. Sei. nat., ?;.20 p. 376 \ 1862 

 Pherusa p.. Bäte, Cat. Amphip. Brit. Mus., p. 145 j 1893 Gammarus locusta (part.), A. 

 Della Valle in : F. Fl. Neapel, v. 20 p. 759. 



Pleon Segments 4 and 5 with dorsal spinules. Antenna 1 apparently shorter 

 than antenna 2, with no accessory flagellum (in figure). Gnathopods 1 and 2, Ott Joint 

 oval, not very large. 



Oeresund. 



G. savii M.-E. 1830 G. s., H. Milne Edwards in: Ann. Sei. nat., u 20 p. 369 | 

 1862 Moera s., Bäte, Cat. Amphip. Brit. Mus., p. 191 | 1893 Maera? s., A. Della Valle 

 in: F. Fl. Neapel, u 20 p. 731. 



Not a species of Gammarus. Pleon segment 4 dorsally produced to an acute 

 tooth, the other pleon segments perfectly smooth. PedUncle of antenna 2 reaching 

 much beyond that of antenna 1. Gnathopod 1 very small. Gnathopod 2 much larger, 

 but still small, much as in G. locusta (p. 476). Uropods 1 — 3 reaching equally far back. 

 Uropod 3 very short, rami veiy small, stiliform. Telson a little horizontal plate. 



North-Atlantic (coasts of la Vendee [France]). 



G. sp., Viv. 1805 G. longicornis (non J. C. Fabricius 1779!), Viviani, Phosphor. 

 Maris, p. 8 t. 2 f. 3, 4 j 1888 G. l, T. Stebbing in: Rep. Voy. Challenger, «?.29 p. 76 f. | 

 1893- Dexamine gibbosa (part.)?, A. Della Valle in: F. Fl. Neapel, «.20 p. 578, 



Antennae 1 and 2 very long and slender, each with 2 long joints in peduncle. 

 Antenna 1 the longer. Uropods 1 — 3, rami laminar, elliptic. Colour yellowish. 

 Genoa. In weedy bays. 

 Das Tierreich. 21. Lief.: T. £. B. Stebbing, Amphipoda I. 83 



