SEURAT, [1915] adopts the opinion of 
RAILLIET & HENRY and thinks that Oxy- 
nema is not even worth considering a new 
Sub-genus. This author includes the species 
crassispiculum (Oxynema rectum) in the genus. 
Allodapa and does altogether away with 
LINSTOW’S genus. 
HALL (1916) agrees with SEURAT. 
Sharing the opinion of TRAVASSOS, we do 
not agree with those who seek to do away 
with the genus Oxynema. The descriptions 
by SONSINO and LINSTOW are altogether 
insufficient. GENDRE’S minutious memo- 
randa (1911) about the copulatory organs of 
the male of Heterakis boueti, accompanied by 
illustrations of the various parts described, 
cannot be stigmatised as wanting in preci- 
sion. WhA therefore, should we not admit 
amongst Subuluriniae the presence of some 
representants possessing one spicule instead 
of the two male copulatory organs, since 
we know that other nematodes (Oxyurians 
for ex.) have only one spicule ? 
We, therefore, reestablish the genus Oxy- 
nema as part of the Sub-family Subulurinae. 
Diagnosis of the Genus. 
Subulurinae: Mouth circular with rudi- 
mentary lips, and six cephalic papillae. Buccal 
capsule, cylindrical, ample, contains three teeth 
in the lower part. Oesophagus accompanied 
by bulb. 
Male: One spicule followed by guber- 
naculum. Sucker without chitinous rim. Caudal 
expansions slightly developed. Genital papil- 
lae vary in number from 10 to 11 pairs. Fe- 
male: Vulva prominent, situated in middle 
part of body. Eggs almost round, embryos 
developed when emitted. 
Habitat: Intestine and caecum of Mam- 
mals (Carnivora, Rodentia.) 
Type-species: Oxynema 
(Sonsino, 1889). 
crassipiculum 
Catalogue of species. 
1. Oxynema crassispiculum (Sonsino, 
1889) Barreto, 1917. 
Heterakis crassispiculum, Sonsino, 
1889 p. 227. 
45 
Oxynema rectum, Linstow, 1899-p. 
19, Pl. 5, fig. 56. 
Subulura (Oxynema) recta, Railliet 
& Henry, 1913-p. 681. 
Subulura (Oxynema) crassispiculum, 
Railliet & Henry, 1913-p. 682. 
Allodapa  crassispiculum, Seurat, 
1915-p. 126. 
Allodapa crassispiculum, Hall, 1916- 
pp. 52 & 60. 
Oxynema crassispiculum, Barreto, 
1917-1917 b.-p. 305. 
Habitat: caecum of Vulpes (Megalotis) 
zerda Zimm. and Vulpes (Vulpes) vulpes var. 
aegyptiaca Desm. 
Geographical distribution: Africa (Egypt). 
2. Oxynema boueti (Gendre, 1911) Bar- 
reto, 1917. 
Heterakis boueti Gendre, 1911-p. 
74, text. figs. 1 to 6 p. 75. 
Subulura (Oxynema) boueti, Railliet 
& Henry, 1913-p. 382. 
Subulura boueti, Travassos, 1913- 
1913 a. p. 19-1913 b. p. 298. 
Subulura boueti, Hall, 1916.-p. 54. 
text-figs. 60 and 63. 
Oxynema boueti, Barreto, 1917-1917 
b. p. 305. 
Habitat: lutestine of Xerus (X.) erythro- 
pus Geoff. 
Geographical distribution: Africa (Daho- 
mey — Agonagon). 
Description of the species. 
Oxynema crassispiculum (Sonsino, 1889) 
Barreto, 1917. 
(PI. XXX, fig. 7.) 
Dimensions: 
S Length: 12 mm. (Sonsino). 5,94 mm. 
(Linstow). Width: 0,35 mm. 
(Sonsino), 0,21 mm. (Linstow). 
Q Length: 18 mm. (Sonsino), 12,21 
mm. (Linstow). width: 0,35 
mm. (Sonsino), 0,28 (Linstow). 
Body subcylindrical, filiform, tapering at 
extremities: anterior extremity obtuse; pos- 
terior sharp-pointed especially in the female, 
