POLYMASTIGINA 



381 



internal membrane in some species) (Fig. 161); trailing flagellum 

 lightly adheres to body surface along edge of cresta; axostyle; para- 

 basal body of various forms; single nucleus anterior; without undu- 

 lating membrane; generally xylophagous. Cytology and morpho- 

 genesis (Kirby, 1944). 



papilla 

 ant. flagella 

 ant. lamella 

 bleph. group 

 nucl. rhiz. 

 parab. fil. 

 parab. body 



cresta 



chrom. mass 

 nucl. memb. 

 chr. cone in ax. 



parab. spiral 



chromoph. element 

 of pb. 



axostyle 

 tr. flagellum 



Fig. 161. A diagrammatic view of the anterior part of Devescovina lem- 

 niscata, showing the cresta and other organellae (Kirby). 



Genus Devescovina Foa. Elongate body, usually pointed poste- 

 riorly; 3 anterior flagella about the body length; trailing flagellum, 

 slender to band-form, about 1-1.5 times the body length; cresta; 

 parabasal body spiraled around axostyle or nucleus; in termite in- 

 testine. Many species (Kirby, 1941, 1949). 



D. lemniscata Kirby (Figs. 161; 162, a). 21-51/* by 9-17//; trailing 

 flagellum a band; cresta long, 7-9/*; in Cryptotermes hermsi and many 

 species of the genus; species of Neotermes, Glyptotermes and 

 Kalotermes (Kirby, 1926a). 



Genus Parajoenia Janicki. Medium large; with rounded extremi- 

 ties; 3 anterior flagella and trailing flagellum long; cresta of moder- 

 ate size; parabasal body well developed with its anterior end close to 

 blepharoplast; stout axostyle expanded anteriorly into leaf -like 

 capitulum, bearing a longitudinal keel; in intestine of termites. 



P. grassii J. (Fig. 162, b). 29-59/* by 12-33/*; trailing flagellum 



