HAWAIIAN ACANTHURID CALIGOIDS — LEWIS 185 



Maxilliped of male similar to that of female except with small, 

 shelflike structure present on middle of inner margin of first segment 

 (fig. 12^). 



Sternal furca of female and male attached between, and sHghtly 

 posterior to, bases of maxillipeds. Bifurcation extending approxi- 

 mately half length of process; tines with bluntly pointed tips (fig. 12Z). 



First thoracic leg bii'amous though endopodite present only as 

 rudiment at junction of protopodite and exopodite. Protopodite 

 strongly developed, one-segmented, greatest length almost equal to 

 that of first segment of exopodite; proximal surface concave, more 

 heavily chitinized than rest of segment, forming articular surface. 

 Single, plumose seta present on inner proximal surface of protopodite 

 and second, plumose seta on outer distal corner. First segment of 

 two-segmented exopodite wider proximally than distally, proximal 

 and distal margins irregular, proximal with slightly projecting, heavily 

 chitinized medial sm'face articulating with protopodite. First seg- 

 ment with single spinule on outer distal corner and row of setules 

 along inner margin. Second segment of exopodite palm-shaped, 

 slightly more than half length of first segment, with three spines 

 arising from distal margin and curved inwards. Inner two terminal 

 spines with small, concave depression on distal inner margin across 

 which fme membrane stretches; with row of stiff, very short setules 

 along inner margin of all three spines, extending to tip of fii'st spine, 

 to concavity of second and third (fig. 12to). 



Second thoracic leg biramous. Protopodite two-segmented; first 

 segment small, less than half length of second. Second segment 

 broad, greatest width about four-fifths greatest length, lateral and 

 distal margins continuous, distal margin irregular. Exopodite three- 

 segmented; length of first segment equal to combined lengths of 

 second and third, with strongly developed, membrane-margined spine 

 projecting distally from outer distal corner. Second segment short, 

 irregular, with slender spine projecting distally from slight protrusion 

 of outer distal corner. Third segment approxunately twice length of 

 second, with irregular lateral and distal margins. Two well-developed 

 spines present on outer lateral margin of third segment, first extending 

 distally from shelflike structure on outer proximal surface, second 

 extending outward from attachment just distal and medial to base of 

 first spine. Endopodite three-segmented; second segment longer than 

 first or thud. First segment with short row of stiff setules on outer 

 distal margin; third segment rounded distally, lateral and distal 

 margins distinct (fig. 12n). 



Third thoracic leg biramous. Protopodite one-segmented, strongly 

 flattened, platehke. Exopodite three-segmented; first segment with 

 two-parted, spinelike process arising from junction of protopodite 



679-677—64 4 



