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PROCEEDINGS OF THE NATIONAL MUSEUM 



especially noticeable by the very setose pereopods but the males and 

 females of E. digitatus also are conspicuous for this condition ; such was 

 not mentioned by Schellenberg. Because of the lack of male E. 

 setifcrus in the collections, all of these "E. setiferus" females have been 

 identified as E. digitatus since that species is abundantly represented 

 by males. 



One way to identify females of this species is by the spots of pigment 

 forming a crown around the top of the head above the eyes; both 

 males and females often have these small spots and no other male of 

 Eurystheus in the collections has these. The spots are not to be 

 likened to stray ommatidia but are distinct, small, irregular blots of 

 pigment below the chitin; however, not all otherwise easily recog- 

 nizable males have these spots in alcohol and so complete reliance 

 cannot be made on them. 



Distribution: Gilbert and EUice Islands; Ifaluk Atoll, Caroline 

 Islands; Eniwetok AtoU, Marshall Islands. 



Eurystheus ?pacificus Schellenberg 



Figure 31 

 Eurystheus pacificus Schellenberg, 193Sa, pp. 80-82, fig. 42. 



Material: Abbott stations 72-G-3 (2), 155-157-G-l (1), 160-165- 

 J-5 (1), 197-198-F-l (10); Keish station E^l (2). 



Remarks: All the specunens collected are females. In one case the 

 female was associated with a male of Megamphopus abbotti, new 



Figure 31. — Eurystheus f pacificus Schellenberg, female, 4.6 mm., Reish sta. E-41: a, 

 lateral view; b,c, gnathopods 1, 2; d,e, pereopods 1, 3;/, uropod 3; g, telson; female, 

 4 mm., Abbott sta. 72-G-3: h, head; i, gnathopod 2. 



