Pleonexes 643 



(err., nou Xröyer 1838!), Cani. Heller in: Denk. Ak. Wien, i-.26ii p. 4-4 t. 4 f . I | 1881 

 A. b., Nebeski in: Arb. Inst. Wien, v.'d p. 149 1. 13 f. 42f | 1893 A. gammaroides -|- A. b., 

 A. Della Valle in: F. Fl. Neapel, t). 20 p. 462 t. 57 f. 36; p. 461 t. 57 f. 33— 35 | 1871 

 Sunamphithoe hamulus (err., non Bäte 18871) -|- S. longicornis, A. Boeck in: Forh. 

 Selsk. Christian., 1870 p. 245 | 1876 S. h. + S. l, A. Boeck, Skand. Arkt. Amphip., v. 2 

 p. 594 t. 27 f. 1 ; p. 596 t. 27 f. 2. 



Body (Fig. 109) smooth, compressed. Head tending to bend a little 

 downward, lateral lobes rounded. Side-plates not very deep, 1^* a little 

 produced forward, 5*^ the largest. Pleon segment 3, postero-lateral corners 

 obtusely quadrate. Eyes small, round, red. Antenna 1 variable, longer or 

 shorter than antenna 2; 1«* Joint larger than 2^^, 3^ less than half as long as 2^; 

 flagellum lo-jointed. Antenna 2, ultimate and penultimate joints of peduncle 

 subequal; flagellum about 10-jointed. Lower lip with outer brauch of bifid 

 lobes produced beyond the inner (Sars: inner lobe obsolete). Mandible, 

 spines in spine-row 8 or 9; 3*^ Joint of palp slightly longer and not broader 

 than 2^. Gnathopod 1, 2^ Joint with distal lobe, 5*^ not ^^^ ^^ ^ 

 longer than broad, 6*^^ oblong oval; palm slightly oblique, 

 finger matching it. Gnathopod 2 in c?, 5*^ Joint short, 

 broad, cup-shaped, 6^^ large, quadrate; palno oblique, strongly 

 sinuous diversely on 2 edges; finger serrulate, sti'ongly 

 arched, touching defining point of palm (Sars describes Fig. no. 



palm as somewhat flexuous and defined by a distinct angle), p. gammaroides. 

 Gnathopod 2 in 9 differing from gnathopod 1 by having [I?ter g^o. Sarso" 

 the 6**^ Joint much larger, oval quadrate, palm oblique, 

 almost sü-aight. Peraeopods 1 and 2, 2* Joint rather broadly oval, 4^** 

 longer than broad. Peraeopod 3, 2*^ Joint scarcely so broad as long. Peraeo- 

 pods 4 and 5, 2'^ Joint long oval. Peraeopods 3 — 5, 6* Joint distally expanded, 

 fitting into cavity of upturned finger towards which spines project planted within 

 the rounded apical lobe of the 6*^ Joint; one of the spines curved. Uropods 1 — 3, 

 peduncle longer than rami. Uropod 3 (Fig. 110), outer ramus with 2 upturned 

 spines; inner laminar with several setae. Telson (Fig. 110) not longer than 

 broad, with a small subapical hook on either side of a convex apex (Sars: 

 terminating in 2 juxtaposed, very sti-ong, hooked projections; in figure longer 

 than broad, with a very narrow, slightly incised apex). Colour bright yellowish 

 gi-een, with scattered black dots or stellate markings. L. 6 — 7 mm. 



North-Atlantic with adjoining seas (Norway, Great Britain, France, Azores). 



P. dubius (R. Tempi.) 1836 Anisopus d., R. Templeton in: Tr. ent. Soc. London, 

 V. 1 p. 185 t. 20 f. 1 I 1862 AmphitJwe dubia, Bäte, Cat. Amphip. Brit. Mus., p. 245 t. 42 

 f. 7 I 1893 A. d., A. Della Valle in: F. Fl. Neapel, ».20 p.464 | 1888 Sunamphithoe d., 

 T. Stebbing in: Rep.Voy. Challenger, u 29 p. 167. 



L. about 4 mm. 



Tropical Indian Ocean (Mauritius)? 



P. validus (Czern.) 1868 Sunamphithoe valida, Czerniavski in : Syezda Russ. 

 Est., Syezda 1 Zool. p. 101 t. 6 f. 36 | 1893 Amphithoe? v., A. Della Valle in: F. Fl. 

 Neapel, u20 p.464. 



Perhaps identical with P. gammaroides. L. about 6 mm. 



Black Sea. 



P. virescens (Stimps.) 1853 Amphithoe v., Stimpson in: Smithson. Contr., v.6 

 nr. 5 p.53 I 1862 Amphithoe punctata (part.). Bäte, Cat. Amphip. Brit. Mus., p. 241 | 1893 

 Grubia crassicornis (part.)?, A. Della Valle in: F. Fl. Neapel, i). 20 p. 467. 



L. 11 mm. 



Fundy Bay (Grand Manan). 



41* 



