412 
PACIFIC SCIENCE, Vol. XIV, October I960 
Fig. 1. Coitocaecum banneri, ventral view. 
FIG. 2. C. banneri, terminal genital organs. 
HOST: Th alas soma duperrey (Quoy and Gai- 
mard), a wrasse. Hawaiian name: hinalea 
lauwili. 
Three of seven fish infected; maximum 
number of worms, 4. 
location: Gall bladder. 
LOCALITY: Kaneohe Bay, Oahu, Hawaii. 
TYPE SPECIMEN: Coitocaecum banneri, de- 
posited as no. 569, Hancock Parasitology 
Collection. 
Coitocaecum hawaiensis n. sp. 
Figs. 3, 4 
specific DIAGNOSIS: Based on four speci- 
mens. Body smooth, spindle-shaped, length 
0.801-1.435, av. 1.136, maximum width 0.385- 
.469, av. 0.418; oral sucker subterminal, 0.107- 
.13, av. 0.119 long, and 0.096-.12, av. 0.11 wide; 
acetabulum near mid-body, 0.192-.256, av. 0.223 
transversely, and 0.1 66- 192, av. 0.82 antero- 
posteriorly; prepharynx short; pharynx oval, 
muscular, 0.08-.104, av. 0.089 long, and 0.064- 
.072, av. 0.071 wide; esophagus usually shorter 
than pharynx; ceca extend laterally and poste- 
riorly to unite a short distance posterior to 
testes; gonads in posterior third of body, ovary 
pretesticular, on right side of body, oval to 
triangular, smooth, 0.084-.088, av. 0.086 long, 
and 0.056— .08, av. 0.071 wide; Mehlis gland 
immediately anterior to ovary; Laurer’s canal 
present; seminal receptacle lacking; coils of 
uterus confined to intercecal area between 
gonads and acetabulum; metraterm about half 
the length of the cirrus sac; eggs yellow, opercu- 
late 0.048-.051, av. 0.05 long, and 0.024-.027, 
av. 0.026 wide; vitellaria richly developed, ex- 
tending from pharynx level to near posterior 
end of body, invading intercecal zone, uniting 
anteriorly and posteriorly; testes immediately 
post-ovarian, tandem, smooth to slightly irreg- 
ular, anterior testis 0.16 long, and 0.056-064, 
av. 0.06 wide; posterior testis 0.128— .137, av. 
0.132 long, and 0.08-.112, av. 0.093 wide; sem- 
inal vesicle saccular, terminating shortly anterior 
to or slightly overlapping acetabulum, sur- 
rounded by large cells with large nuclei; cirrus 
sac nearly as long as seminal vesicle and twice 
as long as metraterm; genital pore ventral, on 
left side of body at pharyngeal level, excretory 
bladder tubular, reaching to ovarian level, open- 
ing at posterior end of body. 
HOST: Thalassoma duperrey (Quoy and Gai- 
mard), a wrasse. In one of seven fish. 
LOCATION: Gall bladder. 
LOCALITY: Kaneohe Bay, Oahu, Hawaii. 
type specimen: Coitocaecum hawaiensis, de- 
posited as no. 5610, Hancock Parasitology 
Collection. 
Coitocaecum novae n. sp. 
Figs. 5, 6 
SPECIFIC DIAGNOSIS: Based on one specimen. 
Body smooth, oval, 1.05 long and 0.476 wide; 
oral sucker 0.144 by 0.128; acetabulum diameter 
0.187; prepharynx short; pharynx oval, 0.048 
long and 0.04 wide; esophagus approximately 
as long as pharynx, glandular, ceca extend lat- 
