842
NEMATODES
[CHAP.
Trichostrongylus subtilis (Looss, 1895)
Synonym.—Trichostrongylus instabilis (Railliet, 1893).
Looss has described a very delicate nematode (Figs. 187-9) frequently encountered in Egyptian fellahs, and since found by
![](http://upload.wikimedia.org/wikipedia/commons/thumb/c/cf/Tropical_Diseases_-_Fig_187.png/300px-Tropical_Diseases_-_Fig_187.png)
Fig. 187.—Trichostrongylus subtilis, male.
Ijima in Japan. Its habitat is the upper part of the small intestine. The male, which is provided with two spicules, is
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Fig. 188.—T. subtilis, female. | Fig. 189.—T. subtilis, bursa. (After Looss.) |
from 4 to 5 mm. in length by 0·07 mm. in breadth; the female is slightly larger and is much more abundant than the male. The eggs (Fig. 168, a) are oval, thin-shelled, with an unseg-