Hawaiian Helminths, III — W. E. Martin 
413 
Fig. 3. Coitocaecum hawaiensis, ventral view. 
Fig. 4. C. hawaiensis, terminal genital organs. 
erally and posteriorly to unite near posterior 
end of body; gonads in posterior half of body, 
ovary pretesticular, three-lobed; Laurer’s canal 
present; seminal receptacle lacking; Mehlis 
gland indistinct; uterine coils few, between 
ovarian and acetabular levels; metraterm short, 
relatively thick- walled; vitellaria extend from 
pharyngeal level to near posterior end of body, 
invading intercecal zone; eggs yellow, operculate, 
approximately 0.049 long and 0.029 wide; testes 
tandem, transversely elongate, lobed; seminal 
vesicle extends posteriorly to anterior margin of 
acetabulum; cirrus sac about twice as long as 
metraterm; cirrus weak, about same length as 
metraterm; common genital pore ventral, on left 
side of body, at mid-esophageal level; excretory 
bladder tubular, reaching to ovary, with thicker- 
walled posterior portion, opening terminally. 
HOST: Ctenochaetus strigosus (Bennett) . One 
of fourteen fish infected. 
LOCATION: Gall bladder. 
LOCALITY: Kaneohe Bay, Oahu, Hawaii. 
TYPE SPECIMEN: Coitocaecum norae, de- 
posited as no. 5611, Hancock Parasitology 
Collection. 
The new species of Coitocaecum described in 
this paper are unique in living in the gall blad- 
der, all other species of the genus having been 
recovered from the digestive tract. C. hannen 
seems to be closest to C. orthorchis Ozaki 1929, 
found in the stomach and intestine of Triden- 
tiger ohscurus Temminck and Schlegel at Hiro- 
shima, and Acanthogobius flavimanus T. and S. 
from the fish market of Takamatsu City, Japan. 
Besides the differences of host and location 
within the host, C. banneri has larger suckers, 
a longer cirrus sac, and smaller eggs than C. 
orthorchis. 
Coitocaecum hawaiensis also is close to C. 
orthorchis and C. banneri. It differs from both 
in having a well-developed cirrus sac and cirrus, 
in having the seminal vesicle surrounded by 
large cells, and in the union of vitellaria an- 
teriorly. 
Coitocaecum norae has lobed, transversely 
elongate and narrow ( anteroposteriorly ) testes 
that distinguish it from all other species of the 
genus. 
5 . 
Fig. 5. Coitocaecum norae, dorsal view. 
Fig. 6. C. norae, terminal genital organs. 
