HAWAIIAN ACANTHURID CALIGOIDS — LEWIS 161 



segment with small accessory spine at terminal end of segment; 

 division between segment and process distinct (fig. 60). 



Maxilliped of C constridus with more distinct projection from 

 posterior surface of first segment; with terminal process of second 

 segment possessing minute denticulations on inner distal surface. 



Sternal furca of C. randalli located between posterior portion of 

 maxilliped bases. Width across base three-fifths width across tines. 

 Bifurcation extending slightly more than half length of furca. Tines 

 with round tips; with membrane continuous around tip of each tine 



(fig- 62^)- 



Tines of sternal furca of C. constridus sharply pointed, not rounded 

 as in C. randalli. 



First thoracic leg biramous though endopodite reduced to rudiment 

 tipped with two minute processes. Protopodite one-segmented, with 

 inner proximal surface covered with minute projections giving segment 

 fuzzy appearance. Two heavily chitinized knobs present as articular 

 surfaces on proximal surface, projecting slightly from segment. First 

 segment of exopodite long, greater than combined length of protopo- 

 dite and second exopodite segment. First segment of exopodite with 

 articular knob and small spine on outer distal corner, spine surrounded 

 by frilled margin. Second and terminal segment of exopodite with 

 irregular inner and distal margins; distal margin with three spines, 

 outermost longer than inner two, triangular in cross section; inner 

 margin of outermost spine with row of minute obtuse processes. 

 Inner two spines on distal margin wavy, distal portion of inner 

 margins with slight concavity, with fine membrane crossing con- 

 cavity; inner margins of both spines with row of minute spinules 

 along entire length. Inner distal corner of second segment with 

 single, naked seta (fig. 7a). 



Second thoracic leg biramous. Protopodite two-segmented, first 

 segment short, approximately one-third length of second. Second 

 segment with single naked seta on outer distal corner. Exopodite 

 three-segmented; first segment slightly more than twice combined 

 lengths of second and third segments, with single spine on outer 

 distal corner, projecting across surface of second segment. Spine on 

 first segment with serrate margins. Second segment of exopodite 

 short, with slightly curved, serrately margined spine on outer distal 

 corner. Third segment longer than second, ovoid, with small, 

 serrately margined spine on outer proximal margin and slightly larger, 

 serrately margined spine just distal to first. Endopodite three-seg- 

 mented; first segment broad, outer surface lobate, rimmed with row 

 of heavy, toothlike setules. Second segment wider than long, 

 smaller than first segment. Third segment smaller than preceding 

 two, distal and lateral margins continuous (fig. 7b). 



