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PACIFIC SCIENCE, VoL XIV, July I960 
Fig. 1. Prionalpheus triarticulatus Banner, a, b, Anterior body region; c, base of antenna and antennules, 
in situ, ventral view; d, mouth parts of right side, medial view, showing groove on anterior end of mandible; 
e, left mandible, posterior view; f, left mandible, medial view; g, first maxilla, with enlargement of teeth on 
bristle; h, first maxilla, inner lobe, side opposite of g; i, second maxilla; j, k, l, first, second, and third max- 
illipeds; m, distal articles, inner face, third maxilliped; n, chelipeds, lateral view; o, fingers of chela; p, second 
legs; q, third legs; r, third leg of dactylus; s, telson and uropods. 
