EUGLENOIDINA 299 



P. acuminata Stokes (Fig. 119, d). About 30-40 m by 20-30/*; 

 nearly circular in outline; longitudinally striated; usually one small 

 paramylon body; flagellum as long as the body. 



P. monilata (S) (Fig. 119, e). 40-55/z by 32-40/*; a short caudal pro- 

 jection; pellicle with minute knobs arranged in longitudinal rows; 

 discoid chromatophores; flagellum about the body length. 



P. torta Lemmermann (Fig. 119, /). 80-100 m by 40-45/*; body 

 twisted, with a long caudal prolongation; longitudinal striae on pel- 

 licle; chromatophores discoid; one large circular paramylon body; 

 flagellum about | the body length. 



P. oscillans Klebs (Fig. 119, g). 15-35/* by 7-10/x; rounded ante- 

 riorly and bluntly pointed posteriorly; striation oblique; 1 or 2 

 paramylon bodies; flagellum about as long as the body. 



Genus Lepocinclis Perty (Crumenula Dujardin). Body more or 

 less ovo-cylindrical; rigid with spirally striated pellicle; often with a 

 short posterior spinous projection; stigma sometimes present; dis- 

 coidal chromatophores numerous and marginal; paramylon bodies 

 usually large and ring-shaped, laterally disposed; without pyrenoids; 

 fresh water. Many species (Pascher, 1925, 1929: Conrad, 1934; 

 Skvortzov, 1937). 



L. ovum (Ehrenberg) (Fig. 120, a). Body 20-40 /x long. 



Genus Trachelomonas Ehrenberg. With a lorica which often pos- 

 sesses numerous spines; sometimes yellowish to dark brown, com- 

 posed of ferric hydroxide impregnated with a brown manganic com- 

 pound (Pringsheim, 1948); a single long flagellum protrudes from 

 the anterior aperture, the rim of which is frequently thickened to 

 form a collar; chromatophores either two curved plates or numerous 

 discs; paramylon bodies small grains; a stigma and pyrenoid; mul- 

 tiplication by fission, one daughter individual retains the lorica and 

 flagellum, while the other escapes and forms a new one; cysts com- 

 mon; fresh water. Numerous species (Palmer, 1902, 1905, 1925, 

 1925a; Pascher, 1924, 1925, 1925a, 1926, 1929; Gordienko, 1929; 

 Conrad, 1932; Skvortzov, 1937; Balech, 1944). 



T. hispida (Perty) (Figs. 32, a; 120, b). Lorica oval, with numerous 

 minute spines; brownish; 8-10 chromatophores; 20-42 /i by 15-26/t; 

 many varieties. 



T. urceolata Stokes (Fig. 120, c). Lorica vasiform, smooth with a 

 short neck; about 45/z long. 



T. piscatoris (Fisher) (Fig. 120, d). Lorica cylindrical with a short 

 neck and with numerous short, conical spines; 25-40/z long; flagel- 

 lum 1-2 times body length. 



