HAWAIIAN ACANTHURID CALIGOIDS — LEWIS 199 



on proximal inner surface. Division between segment and terminal 

 process indistinct (fig. 15f/). 



Second antenna of allotype male three-segmented. Fii-st segment 

 long, outer surface of distal two-thirds forming articular surface 

 for second segment, proximal margin forming blunt, posteriorly 

 directed process. Second segment well developed, with broad base, 

 tapered to narrow distal margin. Distal margin of second segment 

 UTCgular, with heavily chitinized regions forming articular surfaces 

 for third segment. Third segment short, with adhesion surface on 

 inner margin, and seta-like accessory process on posterior surface 

 adjacent to adhesion pad. Terminal process of third segment bifiu-- 

 cate; inner part of bifurcation ciurving inward and proximally as 

 projection of basal region of process, outer part of bifurcation much 

 longer than inner, extending distally before recurving in same manner 

 as first part. Division between segment and terminal process dis- 

 tinct (fig. 15h). 



Mandible of female and male four-parted. First part broader 

 proximally than distally, lateral margins irregular. Length of second 

 part approximately equal to that of first, with even taper to junction 

 of elongate third part. Third part as long as combined lengths of 

 first two parts, tapered slightly to junction of fourth part. Fourth 

 part curving medially at distal end, with 11 toothlike denticulations 

 along inner margin (fig. 15i). 



Postantennal process of female and male simple, shghtly curved 

 spine arising lateral and posterior to attachment of second antenna. 

 Spine with two minute nodules on inner proximal surface, each with 

 long setule (fig. I5j). 



Postoral process of holotype female specimen a plate with projecting 

 bifurcate process and node, at anterior end of plate. Node with three 

 setules of approximately equal length. Inner tine of bifurcate process 

 longer than outer, both tines with rounded distal ends (fig. 15^). 



Postoral process of allotype male specimen similar to holotype 

 though setule-bearing node with two setules, third setule from base 

 of bifurcate process (fig. 151). 



Maxilla of female and male two-segmented, situated lateral and 

 slightly posterior to postoral process. First segment short, well 

 developed, inner proximal surface protruding as lobate articular 

 process. First segment tapered from broad base to narrow distal end, 

 middle of distal end projecting as articular surface for second segment. 

 Second segment elongate, one and a half times length of first segment. 

 Inner proximal margin with small concavity forming ball-and-socket 

 joint with articular surface of first segment. Second segment tapered 

 abruptly in middle, as in A. serratus, but without membrane found in 

 this species, with two long, spinelike processes on distal surface, inner 



