THE EUGLENOIDINA OF OHIO 397 



40. T. piscatoris (Fisher), (Fig. 16, PI. XX). 



Cylindrical rounded posteriorly with prominent neck-like pro- 

 cess anteriorly provided with small teeth and at times with spines ; 

 surface covered with spines; flagellum 11/2-2 times length of body. 



L. 25-40/x. D. ? 



Distribution, North America. Pools. 



41. T. setosa Zykoff (Fig. 1, PI. XXI). 



Oval with numerous long thin spines, approximating the 

 length of the shell, directed posteriorly; collar widened at mouth 

 and provided with teeth ; flagellum ? 



L. 30fx,. 



Distribution, Russia. Plankton of the Volga River. 



*42. T. spinosa Stokes (Fig. 2, PI. XXI). 



Oval, thickly covered with short and somewhat curved spines ; 

 collar low, flagellum? 



L. ? 



Distribution. North America. Pools. Akron, Ohio, Water 



Reservoir. 



*4,3. T. hispida (Perty), (Fig. 3, PI. XXI). 



Oval, yellowish brown, thickly covered with short spines; 

 collar short, often absent; flagellum 11/2-2 times length of body. 



L. 20-42/,. D. 15-26/x. 



Distribution, cosmopolitan. Standing water and Plankton. 



The following varieties have been recognized: 



var. pmwtmta Lemm. finely punctured and without spines. 



var. coronafa thickly covered with short spines while the open- 

 ing of the flagellum is circled by larger spines. 



var. crenulatocollis (Mask ell) flagellum opening wide with col- 

 lar expanded at top and provided with teeth. 



var. caudata Lemm. thickly covered with spines and provided 

 with distinct posterior spike. 



var. cylindrica Klebs, cylindrical and thickly spined. 



var. subarmata Schr()der, covered with spines, those on the 

 ends being much longer. 



In form, number, size, and arrangement of spines the species 



varies widely. 



Ohio, in E. Swamp on South Bass Island and in Portage 

 River (Jennings) and on vegetation in Basket Factory Cove, San- 



