UNIVERSITY OF CALIFORNIA PUBLICATIONS 

 ZOOLOGY 



Vol. 3, No. 14, pp. 343-368, PI. 34,21 text figures. September 28, 1907 



THE STRUCTURE AND MOVEMENTS OF 

 CONDYLOSTOMA PATEN S^ 



BY 

 JOHN F. BOVAED. 



Condylostoma is one of the largest of the unicellular animals, 

 and for this reason was chosen for a series of experiments which 

 had for their object the correlation of body form and movements. 

 This has already been done for Paramaecium, Loxodes, and other 

 ciliates and flagellates; also for Anuraea. (Jennings, :04.) 



The material was obtained from the shallow sloughs along the 

 shores of Oakland, California. Those pools, which were filled 

 only once or twice a month by the high tides and which became 

 more or less stagnant, were found to be the best collecting places. 

 The pools were dredged with a. plankton net of No. 20 bolting 

 cloth. Considerable zoogloea and half decomposed sea-weed were 

 of necessity taken into the net. The animals were found in this 

 ma.ss of zoogloea and debris. Occasionally a few animals were 

 taken from the surface of the water. 



This paper will give, first, a brief review of the ectoplasmic 

 structures of some of the largest ciliates ; second, a discussion of 

 the locomotor movements of Condylostoma patens; and third, an 

 account of the motor reaction showing the relation of the form of 

 the body to the movement. 



The work was done at the University of California during the 

 year 1905-06 under the .supervision of Professor C. A. Kofoicl, to 

 whom I wish to express my sincere appreciation for kindly sug- 

 gestions and help. 



* Cited as Univ. Calif. Publ. Zool., Vol. 3, No. 14. 



t A thesis submitted in partial satisfaction of the requirement of the 

 degree of M.S. in the University of California. 



