VAHLKAMFIA 



321 



LoeschicB in Animals .—Though somewhat beyond the bounds of 

 the present work, we may mention that amoebae, believed to belong 

 to the genus Loeschia, but re- 

 quiring restudy in the light of 

 recent researches, occur in 

 several vertebrates — e.g., L . nut- 

 talli Castellani, 1908, found 

 in liver abscesses and dysentery 

 in monkeys in Ceylon; L. cohaycB 

 in guinea-pigs, L. enterica in 

 cats, etc., L. muris Grassi in ^ 

 mice, considered by Wenyon ^ - ..i^^^^ 



to be L. coli, L. fecalis in 

 several animals, L . intestinalis 



in horses, etc., L. galloparvce Fig. 61. — Loeschia nuttalli Castellani, 

 in turkeys, L. ranarum Grassi 1908 containing Red Blood Cells. 

 in frogs, and many more. 



Genus Vahlkamfia Chatton and Lalung-Bonnaire, 1912. 



Be^miion—GymnamceUda, with vesicular nucleus (protokaryon) 

 having one large karyosome with or without a centrosome, with little 

 peripheral chromatin, with division by promitosis. Cysts typically 

 uninuclear. 



Remarks. — Practically all cultivable amoebae isolated from human 

 stools and potable water by various observers belong to this genus. 

 Cropper has grown a peculiar amoeba belonging to this genus in 

 citrate solution. 



Type. — Vahlkamfia Umax Dujardin, 1841, emendavit Vahlkamf, 

 1904. 



Vahlkamfia punctata Dangeard, 1910. 



This amoeba was found in Indo-China in the motions of a case of 

 diarrhoea. The ectoplasm is rarely visible, and the endoplasm is 



a 



Fig. 62. — Amceba and Cyst found 

 THE LiMAX Type of Nucleus. 

 Diameters.) 



IN Human F^ces and possessing 

 {a) Trophozoite, (&) Cyst, (x 1,950 



(After James, from the Annals of Tropical Medicine and Parasitology .) 



very basophile, while the method of division is by promitosis. The 

 cysts are 8 to 12 in diameter, with a thin wall showing a double 

 contour ornamented with punctations, and always uninucleate. 



