PLATE XLV. 



FIGS. 



1. Cyphoderia trochus var. pahistris Penard. (p. 81) 



After Cash, x 300. 



2-6. C. ampulla (Ehrenb.) Leidy. (p. 70) Fig. 3. An 

 encysted individual. Figs. 2 and 5. Side and oral 

 views of active individuals. Fig. 4. Oral view of 

 an abnormally shaped individual. Fig. 6. Two 

 individuals in conjunction. All after Cash, x 300. 



