HAWAIIAN ACANTHURID CALIGOIDS — LEWIS 



235 



0.03 mm. 



0D3 mm. ^ 



003mm. I ^ 



0D3mm 



Figure 24. — Peniculus calamus? Nordmann, 1864 (female): a, dorsal view; b, lateral view; 

 c, lateral view of neck; d, lateral view of swollen fourth thoracic leg-bearing segment and 

 anterior part of trunk; e, dorsal view of abdomen;/, dorsal view of abdomen of second 

 specimen; g, second antenna; h, mouth cone and mandible; i, maxilla; ; maxilliped; k, 

 first thoracic leg; /, second thoracic leg; m, third thoracic leg; n, fourth thoracic leg; o, p, 

 fourth thoracic legs from different specimens; q, caudal ramus. (Stippling=red areas.) 



nae biu'ied in single, disc-shaped structure attached to fin rays of 

 host. Disc-shaped structure formed from unknown material but 

 presumably either from cement gland of copepod (frontal organ?) or 

 outgrowth of fin rays of host though disc easily separable intact from 



