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U.S. NATIONAL MUSETTM BULLETIN 271 



Figure 15. — 'Sebidae: a, mandible, note absence of molar; i, accessory flagellum; c, uro- 

 pod 3, uniramous and elongate [see Lysianassidae, Leucothoidae, Anamixidae, Amphilo- 

 chidae]; d, maxilliped, [see Pagetinidae]; e, gnathopod 1, note chelateness [see Leucothoi- 

 dae]; /, gnathopod 2, note chelateness and elongation of article 3 [see Pagetinidae]; g, 

 telson; h, antenna 1, note elongation of peduncle [see Lysianassidae]. 



Stenothoidae, Thaumatelsonidae, Cressidae have a reduced coxa 1. 



