MARINE AMPHIPODA IN MICRONESIA — BARNARD 



535 



specimen had lagenifomi eyes; Chilton (1921) reported nearly oval 

 eyes with only a remnant of the neck; Walker (1905) had the oval-eyed 

 form and Tattersall (1922) had both lagenifomi and oval-eyed 

 specimens. 



The present specimens have oval eyes but, in addition, they are 

 unique because the females have gnathopods like those of the male, 

 with an excavate palm. See discussion under the generic heading 



(p. 531). 



Distribution: Tropical Atlantic; Red Sea; Indo Pacific, previously 

 known eastward through Indonesia; Eniwetok Atoll, Marshall Islands. 



Eurystheus digitatus Schellenberg 



Figure 30 

 Eurystheus digitatus Schellenberg, 1938a, pp. 84-86, fig. 44. 



Material: Abbott stations 13-C-l (1), 14-B-3 (11), 19-E-3 (3), 

 28-D-3 (5), 31-D-2 (1), 32-G-3 (2), 39-E-5 (3), 41-D-3 (1), 66-E-lO 

 (3) ; Reish stations E-40 (1), E-68 (1). 



Material, females only: Abbott stations 15-C-2 (2), 42-F-2 (2), 

 46-E-2 (2), 49-E-2 (2), 83-E-l (2) ; Reish stations E-20 (1), E-24 (4), 

 E-28 (1), E-38 (1), E-41 (1), E-93 (4), E-96 (1), E-137 (4). 



Remarks: The dubious females have been compared with other 

 material in which females are associated with males and correspond 

 with them. A possible difficulty in distinguishing these females from 

 as yet undescribed females of E. setiferus Schellenberg (1938a) should 

 be pointed out. According to Schellenberg, males of E. setiferus are 



Figure 30. — Eurystheus digitatus Schellenberg, male, 3.7 mm., Reish sta, E-40: a, lateral 

 view; b, gnathopod 1; c, uropod 3; d, telson; ?female, 5 mm., Reish sta. E-93: e, head; 

 /,g, gnathopods 1, 2; female, 3 mm., Abbott sta. lS-C-2: h,i, gnathopods 1, l;j, pereo- 

 pod 5; female, 3.4 mm., Reish sta. E-93: k,l, gnathopods 1, 2. 



