SYNGAME^E 459 



Geographical Distribution. Brazil, Porto Rico, Cuba, Central 

 Africa, East Africa, Victoria Nyanza, Gold Coast, Uganda, North- 

 Western Rhodesia, Ceylon, Mysore. For other localities where 

 A. dnodenale is also found see p. 450. 



Habitat. In small intestine of man and gorilla (Troglodytes gorilla), 



Necator exilidens, Cummins, 1912. 



Syn. : TV. africanus, Looss, 1911. 



Male 7 mm., female 9 mm. long. The edges of the cutting plates 

 are rounded, not angular, and do not meet in the middle line. Inner 

 (posterior) ventral lancets very small. Lateral lobes of bursa broader 

 than long. Rays thick and plump. 



Habitat. In the chimpanzee (Anthropopithccits troglodytes). 



ANCYLOSTOMIASIS. 



Morbid Anatomy. Organs pale and bloodless. Abdominal 

 organs sodden, and there is fluid in the serous cavities. Lungs: 

 oedema. Kidneys : fatty changes, especially large pale kidney. 

 Liver and heart also show fatty changes there is much haemo- 

 siderin in the liver cells. Blood : early stages, a leucocytosis 20,000 

 upwards, and eosinophilia 50 per cent. Later, anaemia (hydraemia). 

 The number of worms found varies from ten to 1,000. They are rare 

 in the duodenum, but occur as far as 6 ft. from the pylorus. 



Group. Syngameae, Railliet and Henry, 1909. 



Bursa with anterior and median ray cleft ; antero-external, close 

 to median; postero-external, arising separately from posterior; pos- 

 terior bifurcate to base, each branch bifurcate or trifurcate. Vulva in 

 the anterior fourth of body. Uteri divergent. 



Genus. Syngamus, von Siebold, 1836. 



Head thickened, not tapering ; broad mouth with gaping buccal 



capsule. 



Male and female often in permanent copula- 

 Parasitic in respiratory passages of birds and mammals. 

 Habitat. S. trachealis in poultry ; S. bronchialis in goose ; S. laryn- 



geus in cattle ; S. vasicola in goats, etc. 



Syngamus king!, Leiper, 1913. 



Buccal capsules of male and female on same level. In S. trachealis 

 and S. laryngens y that of male in front of that of female. In S. ttispar, 

 that of male behind that of female. Oesophagus of male one-sixth, 

 that of female one-ninth of total length. Mouth capsule in male 

 and female terminal ; it is dorsal in S. trachealis and in mammalian 



