218 mr. g. h. wailes on freshwater rhizopoda. 



Literature. 



1. AwERiNZEW, in Trudui S. Petersburg Obslich, xxxvi. (1906). 



2. Brown, J. M., in Journ. Linn. Soc, Zool. xxx. (1910) & xxxii. (1911). 



3. Cebtes, a. — ' Mission scientifique du Cap Horn/ vi. Zool. (1889). 



4. Daday, E. von, in ^Zoologica,' Stuttgart, Bd. xviii. Hft. 44 (1905). 



5. Greep, E., in Sitzung. der Gesell. Befor. ges. Natur. Marburg, 1888. 



6. Leidy, J. — 'Freshwater Eliizopods of Nortli America,' U.S.A. Geol. Surv. xii. (1879). 



7. Murray, .7. — 'Notes on tlie Natural History of Bolivia,' including a report on the 



Rhizopoda by G. H. Wailes, 1912-13. 



8. Penard, E — ' Faune Rhizopodique du Bassin du Leman,' 1902. 



9. in Revue Suisse de Zoologie, 1899-1912. 



10. in Archiv fiir Protistenkunde, 1905 -1912. 



11. British Antarctic Exped. Reports, Biol. vol. i. pt. vi. (1911). 



12. " Rhizopoda from the Sikkim Himalaya " in Journ. Roy. Micro. Soc, 1907. 



13. " Rhizopoda from Gough Island,'' in Proc. Roy. Phys. Soc. Edinb., 1912. 



14. Schewiakoff, W., in M^m.-Acad. Sci. S. P4tersbourg, 7 ser. vol. xli. no. S. 



15. ScHOUTEDEN, H., in Ann. Biol, lacustre, i. iii. 1906. 



16. Wailes, G. H., in Journ. Linn. Soc, Zool. xxxii. (1912). 



17. Wailes and Penard, Clare Island Survey, pt. 65 ; in Proc Roy. Irish. Acad. xxxi. 



EXPLANATION OF PLATE 15. 



Figs. 1, 2. Arcella megastoma, sp. nov., Penard. Dorsal and side views, x 150. 

 New Jersey. 

 3, 4. Arcella curvata, sp. nov. Dorsal and side views, x 300. Norfolk, 

 Virginia. 



5. Arcella vulgaris, forma. Side view, X 300. Norfolk, Virginia. 



6. EuOLYPHA eilifera var. fyriformis, var. nov. Side view of active 



individual, X 500. Long Island, U.S.A. 

 7-9. Nebela saccifeea, sp. nov. Broad, narrow, and oral views of test, X 200.^ 

 Long Island, U.S.A. 

 10, 11. DiFFLUGiA BicoRNis, Penard. Three-horned form ; side and dorsal views, 

 X 300. New Jersey. 



12, DiFFLUGiA OLLiFORMis, Lagerheim. Side view of active individual, X 300. 



New Jersey. 



13. Nebela dentistoma var, hesperia, var. nov. Broad view of test, X 300. 



Rio Janeiro, Brazil. 

 14-16. Nebela spicata, sp. nov. Broad, narrow, and oral views, x 300. Saudia,. 



Peru. 

 17. Nebela caubata, Leidy. Broad view, x 300. Sandia, Peru. 

 18, 19. Nebela Murrayi, sp. nov. Broad and narrow views, X 300. Puntas. 



Arenas, Chili. 



