derer than that of male. Vulva indistinct, trans- 
versal, situated on ventral surface in the 
anterior half of body, (about 1/2,5 of body), 
{2,5 of the length). Ovijector very long, re- 
markable for globulous middle part of the 
sphincter, where the eggs are found just be- 
fore they are ready to be emitted. (SEURAT) 
Uterus double, hooklets not reaching the 
anal region. Eggs roundish, 0,060 mm. long, 
and 0,051 mm. wide, with reticulated thick 
shell, composed of small polygonal plates 
in their first stadium, getting smoother and 
thinner as segmentation progresses and the 
embryos develop. 
Habitat: caecum of 
Microdipterix macrodipterus (Afzel). 
Caprimulgus fossii (Hartl). 
Caprimulgus aegyptius var v. saharae 
(Erlang). 
Geographical distribution: Africa: French 
Guinea, Dahomey, Southern Tunis. 
26. Subulura similis (Gendre, 1909) 
Railliet & Henry 1913. 
(Plate Ii, fig. 7). 
This species was incompletely described 
by GENDRE, who thought it presented 
great likeness to Heterakis suctoria MO- 
LIN from which it differs only in the pecu- 
liar arrangement of the two penultimate 
caudal papillae oí the male. 
GENDRE does not mention any other 
characteristic of his Heterakis similis, only 
remarking that the vulva opens in front of 
the middle of the body ahout 1/2,3 of total 
length. 
This author gives a list of several hosts 
of this species and calls attention to the diffe- 
rent sizes ofthe same in the diferent indivi- 
duals found in different birds. The following 
are his observations : 
Coracias abyssinicus (Bodd). 
S Length: 9,50 mm.; width: 0,40 mm. 
Eurystomus afer (Gray). 
d Length: 13,08 mm.; width: 0,40 mm. 
Q Length: 18,80 mm.; width: 0,40 mm. 
Scops leucotis (Temm 
33 
d Length: 12,60 to 15mm. width: 0,30 
to 0,636 mm. 
Q Length; 20,12 to 22,45 mm.: 
0,42 to 0,50 mm. 
Centropus monachus (Rupp). 
d Length: 0,4 to 13,08 mm. 
Q Length: 11,06 te 18,4 mm. 
It seems to us that GENDRE put diffe- 
rent species together, as the hosts to which 
he refers belong to distinct orders and sub- 
orders. Thus for instance, the first two birds 
belong to the order Picariae, sub-order 
Coraciae; the third to the order Accipi- 
tres sub-order Striges; the last to the order 
Picariae, sub-order Cocciges. The material 
from Eurystomus afer might be identified 
with Subulura recurvata LINSTOW, taken 
from an Eurystomus afer, from the region of 
Lake Nyassa; it was however GENDRE him- 
self who separated it on account of the ab- 
sence in LINSTOW’S species of the papillae 
which are present at the level of the sucker 
in Subulura similis. 
SKRJABIN mentions a nematode found 
by him in Centropus superciliosus, which he 
classifies as Subulura suctoria MOLIN with- 
out describing it. 
Taking into consideration that the mate- 
rial came from British East Africa, and that 
the host is Centropus, we resolved to iden- 
tify it provisorily with Subulura similis from 
Centropus monachus from Dahomey (Africa). 
Geographical distribution: Africa: French 
Guinea, Dahomey British East Africa. 
width 
27. Subulura elongata (Seurat 1914) 
Barreto, 1917. (1) 
(Plate IX, figs. 1, 2 & 3). 
Dimensions: 
d Length: 16 to 20,5 mm. 
Q Length: 29 to 36 mm.; width: 0,65 mm. 
Body slight. Cephalic alae narrow, deli- 
cately transversally striated, not going beyond 
the middle of oesophagus. Mouth surrounded 
by six papillae; buccal cavity distinctly divi- 
ded into two parts: the upper part bordered 
Note 1. In the present paper. 
