Material; Helminthological Collection of 
the Instituto Oswaldo Cruz. Nos. 1099 to 
1108, 1133 to 1134. 
8. Subulura acutissima Molin 1860. (1) 
Plate IV, figs. 3, 5, 10 and 11. 
Dimensions: 
S Length; 7 mm. width: 0,30 mm. 
© Length: 12 mm. width 0,30 mm. 
Body filiform, sharpened at extremities, 
especially at the posterior end. Head roundish, 
with six papillae, two lateral and four sub- 
median. Mouth hexagonal, small; at entrance 
of oesophagus three teeth of peculiar shape. 
Lateral expansions narrow. 
Male: Tail tapering, sharp-pointed, 
strongly curved. Sucker large, fusiform, far | 
from caudal extremity. Caudal expansions 
present. Spicules equal, long, large, spirally 
curved with accessory piece; genital papillae 
fen on each side, of these five post-anal and 
five pre-anal; the 
sucker. 
Female: Tail very sharp-pointed, straight. 
Vulva in the posterior part of the body. (2) 
Anus far from posterior extremity. 
Habitat: Intestine and proventricle of 
Scops brasilianus Gm. 
Geographic distribution: Brazil. 
9. Subulura annulata (Molin 1860) Tra- 
vassos 1913. (3) 
Dimensions: 
3 Length: 6 mm; width: 0,2 mm. 
Q Length: 8 mm. width: 0,2 mm. 
Note 1. Above, we give MOLIN’S description with 
the modifications introduced by DRASCHE. 
Note 2. As to the vulva being situated in the poste- 
rior part of the body, we think it is a mistake of Molin’s 
probably due to the faultiness of primitive technique; 
he himself says he cannot positively affirm that the 
point he saw was really the vulva, as he could not fol- 
low the direction of the ovijector through the body (vid, 
Molin-1860 page 333 (observations acompaning a descrip- 
tion of Subulura acutissima). 
Note 3. We mention the characteristics noticed by 
Molin ; they are certainly incomplete and lack in preci- 
sion we give them however only calling the organ which 
Molin gives as anus, a sucker, justifying this opinion 
tenth papilla near the | 
25 
by the situation of the genital opening and by the des- 
| 
eription of this organ by the above author. 
Anterior extremity truncate. Mouth ter- 
minal, circular, large and bare. Lateral ex: 
pansions linear. 
Mate: Tail sharp-pcinted. Caudal expan- 
sions narrow. Seven genital expansions : five 
post-anal and two pre-anal. Sucker large and 
circular, distant from anus. Spicules long, 
filiform, curved, with thin point, distant from 
tail end. 
Female: Tail ending in very thin point. 
Vulva prominent situated in anterior part of 
oody. Anus distant from posterior extremity. 
Habitat: Intestine of 
Xenodon severus L. 
Geographic distribution: 
Grosso, Caiçara. 
Brazil, Matto 
10. Subulura suctoria (Moiin 1860) Rail- 
liet & Renry, 1912. 
Plate 4 figs. 2, 7, and 9, Plate 12 figs. 1 and 2. 
Dimensions : 
JS Length: 11,8 to 13,8 mm. width 0,359 
mm. 
Q Length: 20 to 23 mm. width 2,539 
mm. at the level of the vulva. 
Body white, filiform, the anterior part spi- 
rally curved towards the dorsum; the caudal 
part generally rectilinear in the female, spiral 
in the male, the spiral being curved ventrally. 
| Cuticle thin, transversally striated, the stria- 
tions being 0,0024 mm. one from the other. 
Lateral cephalic expansions small, dwindling 
away before the middle part of oesophagus. 
Nerve collar at level of the junction of the 
anterior 1/4 with posterior 3/4 of oesophagus. 
Excretory pore opening in a slight depression 
of the cuticle, on ventral surface between nerve 
collar and middle of oesophagus. Mouth with 
indistinct lips, garnished with six small pa- 
pillae distributed in two lateral rows, each 
made up of three papillae. Buccal cavity 
small, cylindrical, with walls protected by 
thick layers of chitin. Three triangular teeth, 
0.025 mm. long. Oesophagus rectilinear, with 
pear-shaped dilatation at posterior extremity, 
moderately muscular, more considerably so at 
the level of terminal dilatation. Bulb piriform, 
connected at apex with oesophagus. Intes- 
tine without dilated first segment, directly con- 
