PLATE XVIII. 



FlOB. 



1-3. Difflugia crassa Cash. (p. 13) Pigs. 1, 2. — Two indi- 

 viduals, each with three protuberances, but diffe- 

 rently disposed. Pig. 3. — Dorsal view of fig. 1. 

 Pond at Chipperfieldj Herts, x 160. 



4-6. D. Penardi Hopk. (p. 14) Pig. 4. — Living example 

 from a pond at Baguley, Cheshire. Pigs. 5, 6. — 

 Empty tests found in Sphag^ium from Towyn, N. 

 Wales. X 280. 



7, 8. (?) D. pulex Penard. (p. 16) Empty test and living 

 example in Sphagnum from Dolgoch, near Towyn. 

 X 280. 

 9-11. D. pvifitis Penard. (p. 18) Fig. 9.— Empty test 

 slightly tilted to show mouth. Pigs. 10, 11. — Dorsal 

 and lateral views of a living individual. Hill Cliff, 

 Cheshire, x 260. 

 12, 13. D. acuminata Ehrenb. (p. 19) Porms showing ex- 

 tremes of variation. Fig. 12. — Prom Northenden. 

 Fig. 13. — Prom Park Bridge, Ashton-under-Lyne. 

 X 280. 

 14. D. acuminata var. inflata Penard. (p. 23) Prom 

 Sychnant Pass near Conway, N. Wales, 1907. x 280. 



