MARINE AMPHIPODA IN MICRONESIA — BARNARD 



491 



not serrate on inner edge, article 7 very short; article 6 of second 

 gnathopod 1.6 times as long as broad, palm oblique, bearing a blunt 

 tooth at finger hinge, proximal to which is another tooth, separated by 

 a small sinus, then a prominent tooth near defining corner of palm, 

 separated from the more distal tooth by a wide, flat sinus, defining 

 corner indistinctly bifurcate; gnathopods variable in palmar armature 

 with another configuration on left side of holotype having the process 

 at finger hinge and the next proximal much closer together and an 

 additional medial tooth, with tooth near defining corner smaller and 

 bifurcation at corner obsolescent; telson short, apically tridentate. 



Figure 6. — Leucothoe micronesiae, new species, holotype, female, 2.5 mm., Abbott sta. 

 155-157-G-l: a, lateral view; b, gnathopod \; c,d, medial and lateral views of gnathopod 

 2; e, telson; specimens of unknown sex, 1.0, 1.3 mm., Abbott sta. 179-184-M-l:/, g, 

 second gnathopods. 



Holotype: USNM 106805, ovigerous female, 2.5 mm. 



Type locahty: Abbott station 155-157-G-l, Ifaluk Atoll, Oct. 23, 

 1953. 



Material: Abbott stations 122-C-l (2), 155-157-G-l (3), 177-G-5 

 (1), 179-184-M-l (2); Bayer station 467 (8). 



Relationship: This species may represent the female and young of 

 Leucothoe minuscula Schellenberg (1938a), although it would have to 

 be considerably better developed than the female figured by Schellen- 

 berg; the male of that species has article 6 of the second gnathopod 2.3 

 times as long as wide, thus considerably longer than in the present 

 females; only for such a reason have I decided to erect this new species. 



This species is related also to L. brevidigitata Miers (see L. flindersi 

 Stebbing, 1888) because of the short dactyl of gnathopod 1 but 

 differs by the sixth article being broad at its base whereas in L. 

 brevidigitata it is narrow at the base. 



768-792— G5 3 



