AMPHIPODA — STEBBING. 595 



of this species, bub the principal mark by which it was distin- 

 guished from E. caesaris and E. po7npeii depended on the 

 unserrated hmd margin of the third pleon segment. The present 

 specimen has two teeth at the postero-lateral corner. Walker's 

 specimens above-mentioned have three teeth a little above that 

 corner. In the '•• Challenger " E. caesaris the denticles reached 

 nearly the top of the lower lobe of the hind margin, but little 

 more than half-way round it in E. pompeii. The telson of the 

 present species is cleft to less than half the length, but its 

 lateral margins are sinuous, each carrying a group of three 

 setules level with the top of the cleft. In the mandil)les the 

 second joint of the palp though much shorter is much broader 

 than the third. In the first maxillje the first joint of the palp is 

 more than half as long as the second, which has not one only 

 but two sette on its outer margin. The first joint of the palp in 

 the maxillipeds reaches the extremity of the outer plates. The 

 side-plates of the first gnathopods are strongly produced forward, 

 and the hind lobe of the fifth joint is very broadly roanded. 

 Length fully 13 mm. 



Whether this can be retained as a species distinct fiom E. 

 monoculoides seems doubtful. 



Locality. — Off Wata Mooli, from 54-59 fathoms. 



EUSIROIDES MOJ^OCULOIDES, Haswell. 



Station 28. 



Atylus mo'itoculoides, Haswell, Proc. Linn. Soc. N.S. Wales, iv., 

 1880, p. 327, pi. xviii., fig. 4, f, g. 



Eusiroides monoculoides, Stebbing, Das Tierreich, xxi., 1906, p. 

 345. 



Eiisiroides monoculoides, Chevreux, Mem. Soc. Zool. Fr., xx., 

 1908, p. 478. 



A female specimen from Station 28 has the large dark eyes 

 completely meeting at the top of the head so as to justify, so far 

 as general appearance goes, the specific name chosen by Haswell. 

 The second joint of the palp in the first maxilla has two sette on 

 its outer margin. The third pleoa segment has the lower part 

 of the hind margin serrate as in E. pompeii figured in the 

 " Challenger" Report. The telson is not cleft fully to the centre. 



Locality. — Off Manning River. M. Chevreux records speci- 

 mens from a lagoon in the Tuamotu Archipelago. 



