26 
PACIFIC SCIENCE, VoL XXII, January 1968 
structure up to 0.45 mm long by 0.2 mm wide. 
Ventral uterine pore at or just behind level of 
genital pore. The gravid uterus as a whole 
presents many more Indentations than that of 
Pseud eubo thrium xiphiados , which forms a 
rather compact mass. Eggs elliptical, large, 
70-8 Ip X 35-42p. Vitelline follicles small, 
distributed extensively in entire cortex. Vagina 
running alongside vas deferens, then along pos- 
terior margin of cirrus pouch, opening together 
with male pore at base of genital atrium, 
discussion: This species differs from the 
most closely related Pseudeubothrium xiphiados 
n. sp. in the structure of the scolex and proglot- 
tides, in the absence of a bulbous armed cirrus, 
and in egg size. Of these differences the most 
outstanding is the difference in the structure 
of the proglottides. In the type species of 
Pseudeubothrium the laminate cortex of the 
proglottides is so conspicuous that it can easily 
be distinguished from the usual cortex of the 
present species. This difference appears to be 
of generic importance, so I prefer to assign the 
species in question provisionally to a new genus, 
Pseudeubothrioides , which is defined as follows: 
Pseudeubothrioides n. g. 
generic diagnosis: Amphicotylidae, Amphi- 
cotylinae. Scolex with apical disc and elongate 
simple bothria. Strobila serrate, with distinct 
neck and nearly parallel-sided proglottides, 
without median furrow on each flat surface. 
Ventral excretory stems parallel, very wide, 
with transverse anastomosis at posterior end of 
each proglottis. Testes extending mostly along 
longitudinal excretory stems, continuous across 
median line immediately in front of posterior 
border of proglottis. Cirrus pouch with muscular 
wall containing convoluted ejaculatory duct; 
cirrus not forming a bulbous swelling. Genital 
atrium marginal, irregularly alternating from 
side to side, near anterior corner of proglottis. 
Ovary transversely elongated, bipartite, in 
median ventral medulla. Vitellaria confined to 
cortical parenchyma. Vagina opening immedi- 
ately behind cirrus into genital atrium. Uterine 
sac present, muscular when fully gravid. Uterine 
pore submedian, ventral, on pore side. Eggs 
large, thick-shelled, not embryonated. Parasitic 
in intestine of marine teleosts. 
type species: P. iepidocybii n. sp., in Lepi- 
docybium flavobrunneum; Hawaii. 
bothriocephalibae Blanchard, 1849 
3. Bothrtocephalus carangis n. sp. 
Fig. 3 A—E 
habitat: Intestine of Caranx helvolus (type 
host, local name "black ulua”) and Carangoides 
ferdau (local name "ulua"); Hawaii. 
holotype: U. S. Nat. Mus. Helm. Coll., 
S. Y. No. 374. 
description (based on eight, mostly gravid, 
mature specimens) : Strobila 70-120 mm long, 
up to 2-5 mm wide when strongly flattened 
under cover glass, usually 1.0— 1.5 mm wide, 
consisting of 170-230 primary segments and 
15-30 or more secondary segments. Scolex 
longitudinally elongated, 1.0— 1.6 mm long, with 
apical disc 0.25-0.45 mm In diameter, deeply 
Incised laterally; bothria elongate oval in out- 
line, up to 0. 5-0.8 mm wide near posterior end, 
with thin smooth margin. Neck absent. Proglot- 
tides bell-shaped anteriorly, nearly parallel- 
sided posteriorly, with posterior margin slightly 
imbricated, or lateral margins slightly divergent. 
On each flat surface there is a distinct posterior 
median notch. Mature and gravid proglottides 
as long as wide, or longer than wide; the 
fused proglottides containing three sets of 
reproductive organs are longer than wide; pro- 
glottides with one set of reproductive organs 
are usually wider than long; senile end pro- 
glottis smaller than penultimate proglottis, 
longer than wide, convex on each side. Inner 
longitudinal muscle fibers rather weak in mature 
and gravid proglottides. Excretory system retic- 
ulate. 
Testes round, divided into two medullary 
sublateral fields, apparently continuous from 
proglottis to proglottis, and interrupted in 
median field, 30-110 in number In each lateral 
field; this variation In number depends on 
the inadequate segmentation or fusion of pro- 
glottides, or on the degree of their maturity; 
generally speaking, the smallest number occurs 
in an Immature, completely segmented, single 
proglottis; vas deferens convoluted close to base 
of cirrus pouch. Cirrus pouch elongate pyriform 
or claviform, provided with thick layer of inner 
circular and outer longitudinal muscle fibers, 
