CONTENTS 



1. Introduction 343 



(a) General 343 



(b) Methods 345 



(c) New Species 345 



(d) Acknowledgment 346 



2. Structure 346 



3. Development - 347 



4. Economic Importance 348 



(a) General Relation to Water Supplies 348 



(b) Notes on Organisms in Ohio Water Supplies 350 



5. Classification 351 



(a) Historical 351 



(b) Principal Characters 352 



(c) Method of Study 353 



(d) Characters of the Order Euglenoidina 355 



(e) Tables of Families, Genera, and Species 356 



I. Family Euglenidae 356 



1. Genus Euglena 357 



2. Genus Leptocinclis 374 



3. Genus Phacus 377 



4. Genus Cryptoglena 385 



5. Genus Trachelomonas 385 



6. Genus Ascoglena 399 



7. Genus Colacium 400 



8. Genus Eutreptia 401 



II. Family Astasiidae 402 



1. Genus Astasia 402 



2. Genus Menoidium 404 



3. Genus Distigma 406 



4. Genus Sphenomonas 406 



III. Family Peranemidae 406 



1. Genus Euglenopsis 408 



2. Genus Petalomonas 408 



3. Genus Scytomonas 412 



4. Genus Peranema 413 



5. Genus Urceolus 414 



6. Genus Heteronema 415 



7. Genus Tropidoscyphus , 418 



8. Genus Notosolenus 418 



9. Genus Anisonema 419 



10. Genus Ploeotia 421 



11. Genus Metanema 422 



12. Genus Marsupiogaster 423 



13. Genus Entosiphon 423 



14. Genus Clautriavia 424 



15. Genus Dinema 425 



6. Literature 446 



7. Index 447 



