NOTES AND DESCRIPTIONS OF SOME PARASITIC HELMINTHS 479 
made the subject of a critical review by Ortlepp (1925). Thus far four species 
with a possible fifth (S. intermedius Ortlepp) ! have been differentiated. Of these 
only one species, S. numidicus Seurat, 1917, from the Fennec Fox Vulpus cerdo, 
and possibly from the Gerbil also, is not a parasite of Primates. 
The type species S. armatus Blanc, 1912, from Macacus cynomolgus is re- 
corded by Vevers also from M. nemestrinus. A second species, S. pigmentatus 
v. Linstow, is distinguishable, according to Ortlepp, from the type species on the 
basis of a pronounced inflation of the cuticle in the head region, the larger size 
of spicules and gubernaculum, and a very slight difference in the size of the eggs. 
This species originally described from Cercopithecus albigularis, is also said to 
occur in the following African primates: Cercopithecus pygerythrus, Macacus 
sp. Papio porcarius and P. hamadryas. 
A third species, S. intermedius from Cercopithecus patas, which Ortlepp has 
tentatively proposed, occupies an intermediate position in so far as the lengths 
of the spicules go, but does not appear to exhibit any other morphological dif- 
ferences of importance. 
The fourth species from Primates, S. baylist Ortlepp, 1925, has been collected 
from Papio langheldi and P. hamadryas; its distinction from the other species 
mentioned on the basis of a series of claw-like structures in front of the cloacal 
region in the male seems to be well-founded. 
The correct disposition of our material from Liberia offers considerable dif- 
ficulty. The size of the male worms (22 mm. to 24 mm.) and of the female worms 
(from 32 mm. to 70 mm.) gives no clue to the specific identification, the male 
worms actually being smaller than the recorded measurements of either S. 
armatus or S. pigmentatus. So far as the arrangement of the papillae on the 
caudal alae goes, it cannot be distingushed from S. pigmentatus (synonymous, 
according to Ortlepp’s view, in this case with S. armatus) as delineated by M6n- 
nig,” 1924. Postanal sessile papillae as described by Ortlepp for S. armatus are 
wanting. The cuticle is slightly dilated in the neck region, but this character 
together with the deep annulations of the cuticle in the present material may, it 
seems to me, be a result of the method of fixation. The relation of the lips 
and of the teeth surrounding the oval aperture is as described by Moénnig (1924) 
except that the writer was unable to observe three papillae on each of the lips even 
in a head-on view. 
In a female 32 mm. in length the vulva is situated 7.4 mm. from the anterior 
extremity, consequently dividing the body in the ratio of 1:4.3 but the dif- 
ference in the relative position of the vulva in S. armatus and S. pigmentatus 
(1:4 and 1:3.5) does not appear great enough to make it an important point in 
the specific diagnosis. 
The size of the eggs in our material, 35u to 38u by 17.3u does not fall far from 
the average egg size in either of the above-mentioned species and might be 
attributed to either species. 
1 Ortlepp, R. J.: ‘““A Review of the Members of the Genus Streptopharagus Blanc, 1912,” Jour, 
Helminthology (1925), III, 209-216. 7 
2 Monnig, H. O.: ‘South African Parasitic Nematodes’’ 9th and 10th Reports of the Director of 
Veterinary Education and Research (1924), pp. 446-448, figs. 20-22. 
