cu ar appendix in both sexes. Cuticle with 
very close transversal striae, 0,0021 mm. from 
each other, crossed by two lighter longitudinal 
striae. Lateral expansions narrow, lightly 
Striated transversally, extending from the 
head to the middle part of the body in the 
male; in the female they occupy only the ante- 
rior third of body. Nerve ring at the junction 
of the posterior 4/5 and anterior 1/5 of the oeso- 
phagus. Excretory pore opening on the ven- 
tral surface, a little beyond the nerve ring, in 
the anterior third of the oesophagus. Mouth 
hexagonal, with indistinct lips, surrounded by 
six small papillae. Mouth capsule bottle- 
shaped, with walls covered by thick chitinous 
plates of charateristic aspect. (vid. fig. 2). 
Teeth, at, the entrance of the oesophagus, 
three in number, with rounded outline. Oeso- 
phagus with posterior extremity dilated, club- 
shaped, united by a short duct to the pear- 
shaped bulb, containing triangular chitinous 
laminae, which continue directly on to the 
intestine. Intestine with larger initial part, 
rectilinear, slightly inclined towards the ven- 
tral surface and followed by a small rectum 
with light and thin walls. 
Male: Nerve collar 0,338 mm. from ce- 
phalic end. Excretory pore 0,550 mm. from 
anterior extremity. Oesophagus: 1,285 mm. 
inlength. Tail very sharply curved towards the 
ventral surface. Sucker witout ring, surrounded 
by radiating muscular fibres, 0,719 mm. from 
caudal extremity: length 0,169 mm. Genital 
expansions developed, beginning a little above 
the cloaca. Papillae, eleven pairs thus arran- 
ged: three pre-anal, ventral, large and equal 
ones: one in the middle part of the rim of 
the sucker, one at equal distances from the 
sucker and the cloaca, another immediately 
above the anus; two adanal: a larger lateral 
one, another smaller ventral one; six post- 
anal: three large ones at equal distances, 
the two first ventral and the third lateral, 
two small ventral ones near the caudal ex- 
tremity, a very small ventral one between 
the above mentioned groups. Spicules slightly 
unequal in length, strongly chitinous, with 
the near extremity slightly dilated, the distal 
One sharppointed; length of larger spicule 
23 
1,525 mm; of lesser one: 0,465 mm; greatest 
width: 0,033 mm. Gubernaculum measuring 
0,152 mm. Anus 0,169 mm. from posterior 
extremity. 
Female: Nerve collar 0,337 from cephalic 
end. Excretory pore 0,485 mm, from the 
same, Oesophagus 1,336 mm. in size {without 
bulb). Tail straight, very sharp-pointed. Vul- 
va slightly prominent, of irregular outlines, 
placed just in front of the middle part of the 
body. Oviduct turned to the cephalic extre- 
mity, measuring about 0,762 mm.; vestibulum 
relatively short (0,313) containing generally 
three eggs; when seen laterally showing the 
neck deviated towards the ventral plane of 
the body, with a good deal of chitinous co- 
vering: sphincter 0,211 mm. long with a 
group of large cells which are easily seen; 
Horn, measuring 0,348 mm., walls with 
thick muscular layers, becoming suddenly, 
slighter in the preuterine region. Anus 
1,028 mm. distant from posterior extremity. 
Development: Unknown. 
Habitat: Intestine and caecum of Caria- 
ma cristata (L). 
Source: Minas Geraes (Lassance. 
Material: N. 1039 to 1093 and 1121— 
1132 of the Helmintological Collection of the 
Institute Oswaldo Cruz. 
7. Subulura jacchi (Marcel, 1857) Rail- 
liet & Henry, 1913. 
(Pl. IX Fig. 1 PJ. XIII Figs. 1 to 5). 
Dimensions: 
S Length: 10,2 to 14,2 mm.: width: 
0,514 mm. 
Q Length: 13,4 to 17,9 mm, width: 
0,616 mm. 
Body of sanguinolent tint, rectilinear: an- 
terior extremity in form ofa truncate cone, 
straight or slightly deviated towards the dorsal 
surface; posterior part sharp-pointed, strongly 
curved ventrally in the male; straight in the 
female, ending in a short chitinous appendix. 
Cuticle of middle thickness, transversally stri- 
ated, the striae 0,0029 mm. distant one 
from the other, crossed by a clearly seen lon- 
gitudinal line. Lateral expansions developed, 
disappearing beyond the first part of the in- 
