Hawaiian Helminths, III — W. E. Martin 
415 
Fig. 10. Pseudopecoeloides tenuoides. 
Fig. ILF. tenuoides, acetabulum showing pads. 
with thick pads, 0.068— .118, av. 0.098 long, and 
0.087-40?, av. 0.0?6 wide; prepharynx short; 
pharynx 0.087-424, av. 04 long, and 0.65-081, 
av. 0.068 wide; esophagus up to two-thirds 
length of pharynx; ceca proceed laterally and 
posteriorly to unite with excretory bladder near 
posterior end of body; gonads in middle third 
of body; ovary pretesticular, oval to spindle- 
shaped, smooth, 0431-211, av. 048 long, and 
0.062-443, av. 0.096 wide; Mehlis gland im- 
mediately anterior to ovary; Laurer’s canal pres- 
ent; seminal receptacle lacking; uterine coils 
mainly between ovary and seminal vesicle; me- 
traterm indistinct; eggs oval, operculate, 0.040- 
.050, av. 0.044 long, and 0.025-037, av. 0.030 
wide; vitellaria well developed beginning a little 
posterior to the seminal vesicle and extending 
to near the posterior end of body, interrupted 
at gonad levels; testes spindle-shaped, smooth, 
tandem, anterior testis 0487-336, av. 0.267 
long and 0.093-446, av. 0415 wide, posterior 
testis 0.218-348, av. 0.292 long, and 0.093- 
424, av. 0411 wide; seminal vesicle tubular 
with a coiled narrow duct; prostate cells fairly 
numerous; cirrus rudimentary, a cirrus sac was 
not observed; genital opening ventral, sinistra!, 
approximately midway between suckers; excre- 
tory vesicle tubular extending to or near ovary, 
opening terminally as a cloaca. 
HOST: Priacanthus cruentatus (Lacepede). 
Four of seven fish infected; maximum num- 
ber of worms, four. 
LOCATION: Intestine. 
LOCALITY: Kaneohe Bay, Oahu, Hawaii. 
TYPE SPECIMEN: Pseudopecoeloides tenuo- 
ides, deposited as no. 5613, Hancock Par- 
asitology Collection. 
Pseudopecoeloides tenuoides is closest to P. 
tenuis, described by Yamaguti ( 1940) from the 
small intestine of P seudopriacanthus nipponicus 
(Cuv. et Valenc), collected at Hamazima, Mie 
Prefecture, Japan. P. tenuoides differs from P, 
tenuis in having smaller eggs, a smaller oral 
sucker, smaller acetabulum, and in having ace- 
tabular pads. 
REFERENCES 
MANTER, H. W. 1940. Digenetic trematodes of 
fishes from the Galapagos Islands and the 
neighboring Pacific. Allan Hancock Pacif. 
Exped. 2: 329-497. 
Martin, W, E. In press. Hawaiian Helminths, 
II. Dactylostomum cab oiler oi n. sp. (Trema- 
toda: Opecoelidae ) . Caballero Commemora- 
tion Yol. 
Ozaki, Y. 1929. Note on Coitocaecidae, a new 
trematode family. Ann. Zool. Jap. 12: 75-90. 
Skrjabin, K. I. 1958. Trematoda of man and 
animals. Acad. Sci. USSR (Moscow) 15: 1— 
820. 
Yamaguti, S. 1940. Studies on the helminth 
fauna of Japan, pt. 31. Trematodes of fishes, 
VII. Jap. J. Zool. 9: 36-108. 
