•'St. 



148 AQUATIC MICROSCOPY FOR BEGINNERS. 



c. Attached to one another to form colonies. . Dind- 

 bryon, 5. 



c. Not attached to one another (d). 



d. Lorica without a stem, adherent by the narrow 



base, upright. Vagint'cola, 6. 

 d. Lorica without a stem, decumbent, adherent by 

 the broad side. Platycola, 7. 



d. Lorica with a short stem, upright. Cothtirnia, 8. 



e. Extended animal trumpet-shaped. SUntor, 9. 

 /. With one or more flagella at the front [g). , 



f. Without flagella, but with cilia {h). 



g. Body very changeable in shape, colorless; one 



flagellum. Astasia, 10. 

 g. Body very changeable in shape, green or red; one 



flagellum. Euglena, 11. 

 g. Body not changeable in shape, colorless, notched 



in front. Childmonas, 12. 

 g. Body not changeable in shape, green, with a 



short, stiff, colorless tail-like projection. Phdcus, • 



13- 

 . g. Body not changeable in shape, green, united in a 



revolving colony. UvMa, 14. 

 h. Cilia on the entire surface (i). 

 h. Cilia confined to i:he lower or fiat ventral surface 



[k). 

 i. Neck long, very elastic and extensile; colorless. 



Trachelocerca, 15. 

 i. Neck long, flattened, not extensile; colorless. 



AmphiUptus, 16. 

 i. Body brownish, slipper-shaped. Farammcium,'!'] . 

 i. Body green, red, blue or almost black; ovoid or 



trumpet-shaped; cilia largest on the front. 



StMor, 9. 



