MARINE GAMMARIDEAN AMPHIPODA 



53 



Figure 2B.— BASIC GAMMARIDEAN. part II: f, mandible [with 3-articulate palp, molar 

 present and strongly triturative]; g, lower lip [lateral lobes close together, not perfectly 

 oval, inner lobes if distinct, not amalgamated]; h, maxilla 1 [well developed, spinose, 

 palp 2-articulate]; i, maxilla 2 [well developed]; ;, coxae 1-4 [all present, generally sub- 

 equal in size or consecutively slightly larger, quadrate in outline, coxa 4 excavate pos- 

 teriorly]; k, accessory flagellum [multiarticulate]; /, maxiUiped [inner and outer plates 

 large, palp 4-articulate]. See fig. 2A for symbols. 



