MARINE AMPHIPODA IN MICRONESIA — BARNARD 



493 



Distribution: Dry Tortugas, Caribbean Sea; Gilbert and Marshall 

 Islands; Ifaluk Atoll, Caroline Islands. 



J-- d ?^ 



Figure 7. — Leucothoella bannwarthi Schellenberg, male, 2.5 mm., Abbott sta. 113-H-2: 

 a, lateral view; b, epistome; c, mandibular palp; d, gnathopod 1; e, telson; /, gnath- 

 opod 2. 



Family Colomastigidae 



Genus Colomastix Grube 

 Colomastix pusilla Grube 



Colomastix pusilla Grube. — J. L. Barnard 1955, pp. 39-42, fig. 20 (with references) . 



Material: Abbott stations 113-H-2 (2), 116-F-3 (1), 122-C-l (1), 

 209-F-4 (1); Bayer stations 467 (9), 594 (4), 670 (1), 709 (3), 756 (5). 



Distribution: Pan tropical and warm temperate. 



Family Pontogeneiidae 

 Ronco, new genus 



Diagnosis: Mandibular palp slender; upper lip bilobed, epistome 

 unproduced; inner plate of maxilla 1 poorly setose, slender, inner 

 plate of maxilla 2 slender, not setose on inner edge, outer plate twice 

 as wide as inner plate; accessory flagellum vestigial but composed of 

 one long article; lower lip with well-developed inner lobes; gnatho- 

 pods not linear, sixth articles expanded, fifth articles with hindlobes; 

 antenna 1 longer than 2; telson split more than half its length. 



