HAWAIIAN ACANTHURID CALIGOIDS — LEWIS 217 



separated; third, median eye present between paired eyes (fig. 20d). 

 Conspicilla large, distinct, oblong; projecting from dorsal surface of 

 cepbalothorax just anterior and lateral to paired eyes. Surface of 

 conspicilla ridged, similar in appearance to adhesion pads of many 

 pandarids (fig. 19d). 



Second thoracic leg-bearing segment of late encysted and recently 

 excysted specimens larger than third or fourth thoracic leg-bearing 

 segment; lateral margins almost parallel, anterior half forming inner 

 margin of posterior sinuses, posterior lateral margins curving smoothly 

 inward, posterior lateral surfaces projecting slightly past anterior end 

 of third thoracic leg-bearing segment. Posterior margin of second 

 thoracic leg-bearing segment concave; greatest length of segment 

 slightly more than half greatest width. Third thoracic leg-bearing 

 segment with broadly rounded lateral margins, greatest length slightly 

 more than half greatest width in encysted forms, slightly less in 

 excysted form. Posterior lateral margins of third thoracic leg-bearing 

 segment forming small, posteriorly projecting lobes in encysted form, 

 middle of posterior margin slightly convex; posterior margin of 

 recently excysted form evenly cm-ved except for slight concavity in 

 middle. Fourth thoracic leg-bearing segment narrower than third, 

 greatest length approximately two-thirds greatest width; lateral mar- 

 gins evenly curved. Posterior lateral corners of fourth thoracic leg- 

 bearing segment of excysted form forming small, posteriorly projecting 

 lobes, encysted form without lobes. 



Genital segment of late encysted and recently excysted forms of 

 general ovoid shape, slightly wider than fom'th thoracic leg-bearing 

 segment, greatest length approximately two-thirds greatest width; 

 internal spermatophores indistinctly visible in encysted, distinctly 

 visible in excysted specimens. Lateral margins broadly curved; 

 posterior lateral surfaces of genital segment forming smaU, posteriorly 

 projecting lobes with fifth legs projecting from apex as single plumose 

 seta arising from ventral sm-face. Middle of posterior margin convex, 

 projecting slightly over anterior surface of abdomen. Abdomen short, 

 one-segmented, greatest length slightly less than greatest width; 

 widest point in anterior median region of segment, tapered to narrower 

 anterior and posterior ends of segment. Posterior margin of abdomen 

 indented at anus (fig. 20c). 



younger early encysted specimen; /, second antenna of older early encysted specimen; 

 k, second antenna of late encysted and recently excysted specimens; /, mandible of early 

 encysted specimens; m, mandible of late encysted and recently excysted specimens; 

 n, adhesion pad on late encysted and recently excysted specimens (fr = frontal region); 

 0, postoral process of early encysted specimens; p, postoral process of late encysted and 

 recently excysted specimens; q, maxilla of early encysted specimens; r, maxilla of late 

 encysted specimen; j-, maxilla of recently excysted specimen. 

 679-677—64 6 



