EXPLANATION OF PLATES 



All drawings of Streblomastix strix were made with camera lucida from 

 material stained with iron haematoxylin, with a magnification of 2500 unless 

 otherwise stated. 



PLATE 1 



Fig. 1. Ordinary trophozoite showing few turns in torsion of the body. 



Fig. 2. Contracted specimen showing ceutrosonie and blepharoplast near 

 together. 



Fig. 3. Giant individual not fully drawn. Note elongateil rhizoplast with 

 blob of cytoplasm surrounding blepharoplast. 



Fig. 4. Individual showing definite nuclear membrane and blob of proto- 

 plasm with chromatin cap attached to the blephai'oplast. 



Fig. 5. Body slightly contracted with little torsion. 



Fig. 6. Myouemes showing heavily stained lines. 



Fig. 7. Trophozoite with considerable torsion of bod_y. 



Fig. S. Position of parasites in villi of intestine; attached to the mucous 

 lining but not to the cells of the wall. 



Fig. 9. Trojihozoite with greatly elongate rhizoplast. 



[18] 



