PLATE XXXIV. 



Figs. 1-16.— CYPHODERIA AMPULLA. 



Fig. 1. Lateral view of an individual in its natural position, with psendopods extended. 300 

 diameters. Spring on Darby Creek, Delaware County, Pennsylvania. 



Fig. 2. Lateral view of an individual, with pseudopods extended. 360 diameters. Lake Hataca- 

 wanna, New Jersey, March, 1875. 



Fig. 3. Inferior or anterior view of an empty shell. From the same collection. 



Fig. 4. Lateral view of a large specimen, with spur-like process to the fundus. Same collection. 



Fig. 5. Lateral view of an individual in the .natural position. 350 diameters. Fort Bridger, 

 Wyoming, July, 1877. 



Fig. 6. Interior view (corresponding with the lower part of fig. 5) of another specimen, from the 

 same locality. 



Fig. 7. Outline of lateral view of a third specimen. 



Fig. 8. Lateral view of a living specimen. 360 diameters. Lake Hattaeawanna, New Jersey, 

 March, 1875. 



Fig. 9. Lateral view. Spring on Darby Creek, Delaware County, Pennsylvania, April, 1874. 



Fig. 10. Inferior or anterior view of an individual, from same collection. 



Fig. 11. Lateral view of another individual, from the same. 



Fig. 12. Lateral viow of another individual. 



Figs. 13, 14. Inferior and lateral views of (ho same individual. Same locality. 



Fig. 15. Lateral view of another specimen. Same locality. 



Fig. 16. Appearance of the cancellated structure of the shell under high magnifying power. 



Figs. 17-24.— CAMPASCUS CORNUTUS. 250 diameters. 



China Lake, Uinta Mountains, Wyoming, August, 1877. 



Fig. 17. Inferior view, the specimen tilted forward, with interior aarcode visible, and pseudopods 

 extended. Fig. 18. Transverse section with the mouth. Fig. 19. Outline of lateral view turned so as to 

 see one of the processes of the shell. 



Fig. 20. Inferior view of a shell, tilted forward and upright. 



Fig. 21. Lateral view of the same specimen in its natural position. 



Figs. 22-24. Outlines of a specimen in the transverse, inferior and lateral views. 



Figs. 25-41.— SPHENODERIA LENTA. 



Figs. 25, 26. Two views of the same specimen; the shell of globular shape. 500 diameters. 

 Sphagnum of Absecom,N. J., March, 1875. 



Figs. 27, 28. Two views of the same specimen. 250 diameters. Same locality. 



Figs. 29, 30. Lateral views of two living specimens. 500 diameters. Absecom pond, New Jersey. 



Figs. 31, 32. Lateral views of the same specimen. Sphagnum ot Absecoin, September, 1874. 



Figs. 33, 34. Lateral views of two empty shells, as seen under different foci. Found with the 

 preceding. 



Figs. 35-37. Three views of the same specimen. Same locality. 



Figs. 38, 39. Two views of the same specimen. 500 diameters. Sphagnum of Absecom, N. ,1. 



Fig. 40. Lateral view of a large oval shell. 500 diameters. With the forn.er. 



Fig. 41. Lateral view of a large specimen. In sphagnum from Mount Vernon, Alabama. 



Fig. 42. Opposite view of the neck of the same shell. 



