EPHELOTA. 17 



ciliation with that of other forms. Refer to Calkin's Protozoa, 

 Fig. 78, and understand the relation of cirri, membranelles, etc., 

 to cilia. 



Draw, showing the structure in detail. 



2. Run some methjd-green under the cover-glass. What 

 is the shape of the macronucleusf The shape varies consider- 

 ably in the different genera. Is it possible to distinguish the 

 micronucleif 



3. Prepare a fresh slide and observe in detail the character- 

 istic movements and manner of creeping over various objects. 

 As the animal turns sidewise, note the marked dorso-ventral 

 compression of the body. 



Represent this diagrammatically beside the previous drawing. 

 It is desirable to examine permanently stained preparations 

 for division stages, finer details of the nuclei, etc. 



Maier: Ueber den feineren Bau der Wimperapparate der Infusorien. Arch. 



f. Protistenk., 2, 1903. 

 Wallengren: Zur Kenntnis des Neubildungs und Resorptionsprocess bei 



den Teilung der Hypotrichen Infusorien. Zool. Jahrb., 15, 1901. 



EPHELOTA. 



Mount a small piece of hydroid under a supported cover- 

 glass and with a low power observe the suctorians attached 

 by deUcate stalks. Select a field where the animals are abun- 

 dant and study under a high power. 



1. Note the general shape of the cell and the distribution 

 of the tentacles. Draw. Are all of the tentacles of one kind? 

 Observe the movements of the tentacles and their use. Is 

 there any morphological relation between tentacles and cilia? 

 (See Minchin's Protozoa, p. 458.) 



2. Study the method of exogenous budding. What is the 

 relation of this tjrpe to simple division? Is the number of 

 buds in process of formation the same on all specimens? 



3. Fix, stain, and mount in balsam a piece of hydroid with 

 many Ephelota attached. Under the high power note the 

 character of the macronucleus and its relation to the buds. 



Are micronuclei visible? 

 2 



