474 THE ANIMAL PARASITES OF MAN 



CULTIVATION OF LARVAL FORMS OF ANCYLOSTOMA AND STRONGYLOIDES. 



A modification of the second method of Looss (p. 455) is that of 

 Fiilleborn. A glass filter funnel is lined with linen or with cotton wool 

 dyed black with iron-tannin. On this is placed a layer of sterile sand, and 

 on top of this the faeces. The whole is moistened. The larvae hatch out 

 and wander through the meshes of the wool, appearing on the edges of the 

 same as white threads visible to the naked eye. With a platinum needle 

 these can be easily removed. The glass filter can be placed on a glass 

 cylinder, and this in another large stoppered cylinder containing caustic 

 potash solution at the bottom, so that any larvae escaping from the funnel 

 are killed. 



