EUGLENOIDINA 



305 



nucleus centro-lateral; fresh water. 



E. sulcatum (Dujardin) (Fig. 123, i). About 20/i long (Lackey, 

 1929, 1929a). 



E. ovatum Stokes. Anterior end rounded; 10-12 longitudinal 

 striae; about 25-28/z long. 



Genus Notosolenus Stokes. Free-swimming; rigid oval; ventral 



Fig. 123. a, Anisonema acinus, X400 (Klebs); b, A. truncatum, X430 

 (Stein); c, A. emerginatum, X530 (Stokes); d, Peranema trichophorum, 

 X670; e, Heteronema acus, X430 (Stein); f, H. mutabile, XI 20 (Stokes); 

 g, Tropidoscyphus octocostatus, X290 (Lemmermann); h, Distigma proteus, 

 X430 (Stein); i, Entosiphon sulcatum, X430 (Stein); j, Notosolenus apo- 

 camptus, X120 (Stokes); k, N. sinuatus, X600 (Stokes); 1, m, front and 

 side views of Triangulomonas rigida, X935 (Lackey); n, Marsupiogaster 

 striata, X590 (Schewiakoff ) ; o, M. picta (Faria, da Cunha and Pinto). 



