MALARIA EXPEDITION TO NIGERIA 9 
Some species live in moist earth, others are described as causing a disease 
resembling typhoid, and larvae of species have been formed in the papules of some 
skin eruptions in man and dogs. 
Genus Anguillula. Oesophagus has two bulbs, posterior has no teeth. Male 
is provided with a bursa with no papillae. The uterus is asymmetrical. 
Numerous species are parasitic on plants, wheat, etc. Anguillula aeeti is 
found in vinegar and paste. Others present two mature generations which succeed 
each other, (1) a free form, dioecious, resembling Rhabditis, and (2) a hermaphroditic 
form which is parasitic. 
Oerley places these in a new family, Angiostomides with three genera — 
Angiostoma, Strongyloides and Allantonema. 
Anguillula intestinale (Strongyloides intestinale, Anguillula stercoralis) is 
parasitic in the intestine of man, giving rise to some forms of diarrhoea and dysentery 
(Cochin China), and produces ova which give rise to rhabditirorm larvae, which are 
passed with the faeces. In the soil these become sexually mature, pair and produce 
larvae, which eventually reach the digestive tube to become Anguillulae intestinale. 
VII. Enophidae 
These are free living, small, usually marine ; devoid of a second oesophageal 
bulb. Eyes and mouth armature otten present. Pine hairs and bristles surround 
the mouth. 
Genera : Enoplus, Dorylaimus, Encbelidinm, etc. Some species are parasitic on 
plants, others on the sea urchin, and other animals. 
B 
