Elasmopus 443 



Segment 4 dorsally produced into 2 strong teeth. Head with a small lateral 

 tooth behind the lateral lobes. Side-plates 1 — 4 rather deep, 1^* in front 

 rounded or subacute, not much produced. Pleon segment 3, postero-lateral 

 Corners truncated and arraed with 3 — 5 teeth. Eyes oval, black. Antenna 1 

 elongate, 2'^ Joint rather longer than 1^*, 3*^ very short, accessory flagellum 

 with 3 rather long joints. Antenna 2 shorter, ultimate Joint of peduncle shorter 

 than peuultimate. Gnathopod 1 as in E. subcarinatus (p. 441). Gnathopod 2, 

 5*^ Joint Short, broad, cup-shaped, 6*'^ large, oblong, rounded at base. slightly 

 widened distally, palin nearly ti-ansverse, not defiued by a tooth, but diversified 

 by a shallow emargination and 3 or 4 very obscure indications of teeth. 

 Peraeopods 1 and 2 very slender, finger long. Peraeopods 3 — 5 as in 

 E. subcarinatus. üropod 3, rami subfoliaceous, rather narrow-ovate, and not 

 gi-eatly elongated. Telson, lobes subcylindrical, tipped with a few setae. 

 Colour (in spirit) light brownish pink. L. 8 — 9 min. 



Torres Strait (Siie Island, Albany Island); Port Denison [East-Australia]. 

 Depth 6—8 ni. 



4. E. brasiliensis (Dana) 1853 & 55 Gammarus b., J. D. Dana in: TJ. S. expl. 

 Exp.. v.l3n p.956 t. 65 f. 10 | 1888 G. b., Elasmopus (part.)?, T. Stebbing in: Rep. Voy. 

 Ohallenger, t^. 29 p. 267. 516 i 1893 G.b., E.{part.)?, A. Della Valle in: F. Fl. JS'eapel, i-.20 

 p. 737, 927 I 1880 Moerab., Kossmann, Reise Koth. Meer., v.2i Malacost. p. 132 | 1862 

 Gammarella b. -f- ?M. pedenicrus, M. pedinicrus, Bäte, Cat. Arnphip. Brit. Mus., p. 180 

 t. 32 f. 9; p. 192 t. 34 f. 8. 



Body smooth. Eyes small, and (Bäte) irregulär. Antenna 1, flagellum 

 rather longer than peduncle, many-jointed, accessory flagellum very small 

 and Short (Dana), 2-jointed (Bäte). Antenna 2 half as long as antenna 1, 

 flagellum short. Mandible, 3*^ Joint of palp (Dana's figure) falcate, with long 

 row of spinules. Gnathopod 1 small, 5*^ and 6*^^ joints subequal, 6^^ subovate, 

 birsute on bind margin. Gnathopod 2 very stout, 5*^ Joint short, cup-shaped, 

 ßth large, piriform, densely furnished beliind with long slender setae, palm 

 oblique, not defined (Bäte mentions a tubercle near the finger-hinge), finger 

 long, curved. Gnathopod 2 in 9 much smaller than in ö , 6**^ Joint subovate, 

 setose. Peraeopods 1 — 5 apparently much as in H subcarinatus (p. 441) 

 and 'other species; (Bäte: peraeopod 4, 2<^ Joint abruptly narrow distally). 

 üropods 1 — 3 subequal. L. 8—9 mm. 



Tropica! Atlantic (Rio Janeiro); tropical Pacific (New Guinea)? 



5. E. pocillimanus (Bäte) 1862 Moerap., Bäte, Cat. Amphip. Brit. Mus., p. 191 

 t. 34 f. 7 I 1888 Maerap., T. Stebbing in: Rep. Voy. Challenger, v. 29 p. 335 | 1893 

 Elasmopus p., A. Della Valle in: F. Fl. Neapel, v. 20" p. 733 t. 1 f. 4; t. 22 f. 23—25 | 

 ? 1874 Moera levis, (S. 1. Smith in :) A. E. Verrill in : Rep. U. S. Fish Oomm., v. 1 p. 559. 



Body very robust. Side-plate 1 rhomboidal. Pleon segment 3, postero- 

 lateral Corners produced, their bind margin crenulate. Eyes large, elliptic, 

 tending to reniform, violet-brown. Antenna 1 nearly as long as body (Della 

 Valle) or half as long (Bäte), flagellum as long as peduncle, accessory flagellum 

 rudimentary. Antenna 2 much shorter, flagellum veiy short. Gnathopod 1, 

 b^^ and 6**^ joints equal, not large, finger small; 6*'^ Joint differing on right 

 and left side. Gnathopod 2, 5*"^ Joint short, cup-shaped, 6^^ large, long, a 

 little narrowed distally, palm without processes or defining tooth, but in 

 place of the latter having a bowl-shaped excavation of the inner surface 

 for receiving the tip of the finger, which (Della Valle) is obtuse. Peraeo- 

 pods 1 — 5 much as in the preceding species. üropods 1 — 3 extending 

 nearly to the same length. üropod 3, rami scarcely longer than the peduncle, 



