PLATE XX. 



Figs. 



1. Diffiiu/ia bacillifera Ven&rd. (p. 17) Atypical example 

 incrusted with diatoijis. Capel Cui-ig, June^ 1908. 

 X 280. 

 2-5. D. bacillariarum var. elegans (Penard) Cash. (p. 28) 

 Figs. 2-4. — -Various forms from Delamere^ Cheshire, 

 June, 1908. x 340. Pig. 5. — An example from 

 Dunham Marsh, 1904. x 280. 

 6, 7. D. orbicularis Cash. (p. 38) Pig. 6. — Lateral view 

 of a living individual. Pig. 7. — Oral view of an 

 empty test. Dunham Marsh, Cheshire. X 400. 

 8-12. D. oviformis Cash. (p. .52) Pigs. 8, 9. — Lateral and 

 dorsal views of an individual showing the disposition 

 of the pseudopodia when in action. Pig. 10. — Mouth 

 and collar of the same. Pig. 11. — An individual 

 with a five-lobed mouth. Pig. 12. — -Mouth and 

 collar of the same. All from Chelford, Cheshire. 

 X 280. 

 13, 14. Phryganella acropodia (Hertw. and Less.) Hopk. (p. 

 74) Two individuals in face view, showing variation 

 in size. Dunham Marsh, x 280. 

 15, 16. P. paradoxa Penard. (p. 76) Dorsal and lateral 

 views of a living individual found on dripping sand- 

 stone rocks, Baguley, Cheshire, x 280. 

 17, 18. Difflui/ieUa apiculata Cash. (p. 78) Dorsal and side 

 views of an active individual from a stream near 

 Barking, Essex, x 400. 



