212 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 115 



Hawaii (USNM 105179). Immature male and its exuviiim taken 

 by Carolyn Lewis from cyst on pectoral fin of specimen of Diodon 

 holocanthus Linnaeus donated by Honolulu Aquarium (USNM 

 105180). Immature male taken by author from cyst on pectoral fin 

 of specimen of Diodon holocanthus Linnaeus donated by Honolulu 

 Aquarium (USNM 105181). One cyst containing immature male 

 taken by author from pectoral fin of specimen of Ctenochaetus strigosus 

 (Bennett) donated by Honolulu Aquarium (USNM 105182). Im- 

 mature male taken by author from cyst on dorsal fin of specimen of 

 Acanthurus triostegus sandvicensis Streets speared by N. Ferris in 

 Kaneohe Bay, Oahu, Hawaii (USNM 105183). Immature male taken 

 by author from cyst on dorsal fin of specimen of Scarus species speared 

 by author in Hanauma Bay, Oahu, Hawaii (USNM 105184). 



Additional specimens, not used in the following description, were 

 taken from cysts on fins of specimens of the following families of 

 fishes: Labridae, Pomacentridae, Zanclidae. 



Measurements. — Early encysted stage (two specimens) : Length 

 from anterior end of body to posterior end of caudal rami, excluding 

 setae, 1.90 and 2.58 mm. Greatest length of cephalothorax, including 

 frontal region, 0.82 and 1.23 mm.; greatest width 1.03 and 1.31 mm. 

 Greatest length of free thoracic leg-bearing segments, genital segment, 

 abdomen, and caudal rami, excluding setae, 1.11 and 1.60 mm. Great- 

 est length of genital segment 0.18 and 0.34 mm.; greatest width of 

 genital segment 0.36 and 0.42 mm. Greatest length of abdomen 0.13 

 and 0.17 mm. Greatest length of caudal rami, excluding setae, 0.25 

 mm. 



Late encysted and recently excysted stage (five encysted specimens, 

 one recently excysted specimen) : Average length from anterior end 

 of body to posterior end of caudal rami, excluding setae, 3.40 mm.; 

 range 2.94-4.05 mm. Average of greatest length of cephalothorax, 

 including frontal region, 2.02 mm.; range 1.84-2.12 mm.; average of 

 greatest width 2.02 mm.; range 1.66-2.21 mm. Average of greatest 

 length of free thoracic leg-bearing segments, genital segment, abdomen, 

 and caudal rami, excluding setae, 1.93 mm.; range 1.47-2.30 mm. 

 Average of greatest length of genital segment 0.49 mm.; range 0.42- 

 0.59 mm.; average of greatest width 0.73 mm.; range 0.64-0.82 mm. 

 Average of greatest length of abdomen and caudal rami, excluding 

 setae, 0.24 mm.; range 0.15-0.29 mm. Average of greatest length of 

 abdomen 0.21 mm.; range 0.17-0.27 mm. Average of greatest length 

 of caudal rami, excluding setae, 0.18 mm.; range 0.15-0.21 mm. 



Description. — Color of all stages light brown to brownish yellow 

 in life, with no distinct color pattern. Conspicilla transparent, dis- 

 tinct on dorsal surface. Eyes reddish brown. Single excysted speci- 



