PLATE XYI. 



FIGS. 



1-9. Pseudochlamys patella G\&\). &Lachm. (p. 129) Fig. 1. 

 Ordinary discoid phase of an adult individual. 

 Pond at Northen Echells, Cheshire. x 500. 

 Figs. 2-4. Phases of a young individual with 

 pliable test. x 500. Fig. 5. Another in the same 

 stage of growth, inert, the margins of the test over- 

 lapping 1 , x 500. Fig. 6. An individual exhibiting 

 a digitate pseudopod. x 500. Figs. 79. Different 

 aspects as figured by Claparede and Lachmann. 



10-14. Centropyxis aculeata Stein, (p. 132) Fig. 10. An 

 empty test of the typical form. Fig. 11. The same, 

 viewed obliquely. Figs. 12 and 13. Views of a 

 living example, in different positions, and showing 

 variation from the type. Fig. 14. An encysted 

 example. Dunham, Cheshire. All x 300. 



15. C. aculeata var. spinosa Cash. (p. 135) Dunham, 



Cheshire, x 300. 



16. C. aculeata var. ecornis Leidy. (p. 135) An empty 



test, showing ordinary spineless character. Pond, 

 Baguley, Cheshire, x 300. 



