HAWAIIAN ACANTHURID CALIGOIDS — LEWIS 153 



Second part short, approximately one-third length of first part, taper- 

 ing sharply to junction with third part. Third part long, slender, 

 length of fu-st and third parts about equal. Thu"d part equal in width 

 throughout entire length. Fourth part short, curved inwards; 

 outer margin slightly thickened, inner margin thin, with 13 toothlike 

 denticulations (fig. 4j). 



Postantennal process of female simple, spinelike, attached lateral, 

 and slightly posterior, to base of second antenna. Process directed 

 posteriorly, cm*ving medially; two minute nodules present on proximal 

 surface, each bearing two minute setules. Larger nodule present 

 anterior to base of process, bearing single, large setule (fig. 4^) . 



Postantennal process of male as in female, except spinelike process 

 slender, falciform; large nodule adjacent to middle of process, not 

 anterior to base as in female (fig. 41). 



Postoral process of female and male simple, located slightly lateral 

 to base of mouth cone. Process directed posteriorly, wider at base, 

 wdth sharp taper in proximal region, medial and distal portions 

 tapered gradually to blunt, rounded tip. Postoral process with 

 distinct node just anterior to base of process; node with two setule- 

 like structures arising from distal surface, first setule about twice 

 length of second (fig. 4m) . 



Maxilla of female and male two-segmented, attached just lateral 

 and posterior to postoral process. First segment oblong, proximal 

 surface without protruding articular surface, distal surface tapered 

 abruptly to small, narrow, lobate projection with heavily chitinized 

 distal end. Second segment elongate, of approximately equal width 

 throughout; inner proximal surface with small concavity that fits 

 over distal end of first segment as ball-and-socket joint. Second 

 segment with strong spine on inner surface slightly distal to middle 

 of segment. Distal end of second segment with two long spines, inner 

 slightly less than twice length of outer, with fine, membranous margin 

 along inner and outer surfaces; outer spine with frilled membrane 

 along inner surface, very narrow, plain membrane along outer surface 

 (fig. 4n). 



Maxilliped of female two-segmented, attached slightly medial and 

 posterior to maxilla. First segment slightly more than two times 

 length of second segment plus processes. First segment with pro- 

 jection of inner proximal surface forming articular surface; lateral 

 margins slightly convex, distal margin at angle to lateral margins, 

 slanted sharply inward. Width of second segment less than half 

 greatest width of first segment, tapered slightl}^ from proximal to 

 distal ends. Terminal process of second segment strongly developed, 

 spinelike, curved inwards slightly, less than half length of second 

 segment. Accessory process slender, spinelike projection from inner 



679-677—64 2 



