HAWAIIAN ACANTHURID CALIGOIDS — LEWIS 221 



minute, lobate projections from distal surface. Early encysted 

 specimens with indistinct evidence of two-segmented exopodite and 

 endopodite visible inside dactyliform rami (figs. 2le,J). 



First thoracic leg of late encysted and recently excysted specimens 

 biramous. Protopodite irregular in outline, with two plumose setae, 

 one on either side of rami. Exopodite two-segmented; first segment 

 longer than second, lateral margins u'regularly convex, with single 

 spine from outer distal lateral corner. Second segment with narrow 

 proximal surface, wide distal surface; lateral and distal margins con- 

 tinuous. Endopodite two-segmented, both segments of approxi- 

 mately equal length. First segment slightly shorter than second, 

 with convex lateral margins in encysted specimens, of rectangular 

 shape in excysted specimen. Second segment with continuous distal 

 and outer lateral margins (fig. 21^). 



Second thoracic leg of early encysted specimens biramous, rami 

 one-segmented. Both protopodite and rami flaccid; protopodite with 

 minute projections on inner surface of younger specimen, plumose 

 setule on older. Exopodite slightly longer than endopodite, tipped 

 with four minute, lobate projections, one from each distal lateral 

 surface, two from distal surface. Endopodite with single plumose 

 setule from middle of inner margin, four minute, sharp projections 

 from distal margin. Two-segmented exopodite and endopodite of 

 late encysted specimens visible inside rami (figs. 21h,i). 



Second thoracic leg of late encysted and recently excysted specimens 

 biramous. Protopodite broad, length approximately three-fourths 

 width, with single naked setule on distal margin next to outer lateral 

 margin of exopodite and plumose seta on inner proximal margin. 

 Exopodite two-segmented; first segment longer than second, narrower 

 proximally than distally, outer surface with patch of short, hairlike 

 projections giving fuzzy appearance to region. First segment with 

 single spine on outer distal lateral margin. Second segment of ex- 

 opodite orbicular, margins continuous, with three small, membrane- 

 margined spines on outer lateral margin. Endopodite two-segmented ; 

 first segment slightly more than half length of second, second segment 

 of general ovoid shape, lateral and distal margins distinct (fig. 21j). 



Third thoracic legs of early encysted forms biramous, rami one- 

 segmented. Protopodite and rami flaccid; protopodite of older 

 specimen with single, plumose setule from inner proximal margin, 

 with small, knoblike projection outside exopodite of younger specimen. 

 Both rami of about equal length, exopodite of younger specimen 

 with three plumose setules from distal margin, one from inner lateral 

 margin and four minute, spinelike processes from distal outer margin. 

 Exopodite of older specimen with three plumose setules from distal 

 margin ; one plumose setule and one minute plumose setule from outer 



