Gamraarus , 473 



Peraeopods 3 — 5 rather short and stout, 2^ joiut in peraeopod 3 with lower 

 liind Corner rounded, free, in peraeopods 4 and 5 narrowed distally, without 

 a free corner. üropod 1 reaching be3'ond uropod 2, uropod 3 beyond uropod 1. 

 üropod 3, oiiter ramus long, with spines and setae on both margins, 2*^ Joint 

 small, spiniform, inner ramus very narrow, scarcely '/^ as long as outer. Telson 

 rather small, lobes distally divergent, each with 2 marginal spines near base, 

 and 3 on the truncate apex, 1 or 2 setules usually near outer margin a 

 little above apex. Colour gi'eenish or yellowish brown. L. 15 mm. 



North-Atlaiitic with adjoining seas (Europe, from Trondhjemsfjord round tlie 

 marine coasts to the Black Sea; North-East- America). Littoral. 



23. Gr. simoni Chevreux 1894 G. s., Chevreux in: Bnll. Soc. zool. France, r. 19 

 p. 171 f. 2— 10. 



Pleon Segments 1 — 3 each with 2 or 3 dorsal setules, segments.4 — 6 

 with dorsal spiuules, segment 4 with 2 near together, segment 6 with 2 

 Wide apart, segment 5 with 2 pairs, eacli pair having between then 2 setules. 

 Head, lateral lobes obtusely truncate. Side-plate 4 rather less broad than 

 deep. Pleon segments 2 and 3, postero-laterai corners produced, acute. Eyes 

 small, oval. Antenna 1 in d '^/., as long as body, peduncle short, P^ Joint 

 as long as 2^ and 3*^ combined, flagellum twice as long as peduncle, 30 — 35- 

 jointed, accessory flagellum (1-) 3 — 5-jointed. Antenna 2 in d considerably 

 shorter, peduncle robust, ultimate and penultimate joints tufted with long 

 setae, flagellum 1 2-jointed, % (or less) of it setose like peduncle, apparently 

 without calceoli. Antenna 1 in Q as in (S. Antenna 2 in o shorter, less 

 robust, setae few and short. Gnathopods 1 and 2 in g feeble, 6*^ Joint 

 oblong, tending to oval, with oblique palm in gnathopod 1, rather longer 

 and narrower, with palm almost transverse in gnathopod 2. Gnathopod 1 

 in ö, side plate with sinuous front margin (in figure), 6^^ Joint large, piriform, 

 with 6 spines on hind margin and palm, finger long, curved, its apex closing 

 against side of 6*^ Joint. Gnathopod 2 in d scarcely larger, 6*^ Joint oval, 

 with 3 spines on the couvex palm. which the finger fits. Peraeopods 1 — 5 

 short and robust, üropod 2 reaching nearly as far as uropod l. üropod 3, 

 outer ramus long and broad, fringed with spines and plumose setae, 2*^ Joint 

 small, spiniform, with apical setae, imier ramus rather broad, about ^/^ as 

 long as 1''* Joint of outer, with 2 apical spines. Telson with broad divergent 

 lobes, each having a spine on outer margin near the base, 2 spines and 

 some setules on rounded apex, and in d a sub-central spinule. L. o 6, d 

 reaching 8 mra. 



Algeria and Tunis. Fresh water. 



24. G. duebenii Lilj. 1851 G. d., W. Liljeborg in: Öfv. Ak. Förh., v.S p. 22 | 

 1888 G. cL, T. Stebbing in: Rep. Voy. Ohallenger, t;. 29 p. 252 | 1894 G. duebeni, G. 0. 

 Sars, Crust. Norway, t). 1 p. 502 1. 177 f . 1 | 1895 G. duaheni, T.Scott in: Rep. Fish. 

 Board Scotl., v. 13 p. 180, 244 | 1862 G. locmta (part.). Bäte, Cat. Amphip. Brit. Mus., 

 p. 206 I 1876 G. l, A. Boeck, Skand. Arkt. Amphip., v. 2 p. 367 \ 1893 G. l. (part.j, A. 

 DellaValle in: F. Fl. Neapel, u 20 p. 760 i 1874 G. marinus (part.), RitzemaBos, Bijdr.^ 

 Crust. Hedriophthal., p.44 j 1889 G. campylops (err., non Leach 1815!), A. M. Norman 

 in: Ann. nat. Hist, ser. 6 ».4 p. 139 t. 12 f. 13 | 1889 G. locusta var. C, Hoek in: 

 Tijdschr. Nederl. dierk. Ver., ser. 2 u 2 p. 219 t. 10 f. 13, 13'. 



In form like G. locusta (p. 476). Pleon segments 4 — 6 each with 2 spines 

 in median dorsal group and 3 in each lateral group, also clothed with numerous 

 rather long hairs. Head, lateral lobes vertically truncate. Side-plates 1 — 4 

 smaller than in G. locusta, more like those in G. marinus. Pleon segments 2 

 and 3, postero-laterai corners acutely quadrate. Eyes not very large, reni- 



