66 



COLLEGE ZOOLOGY 



OJl 



Kerona from Hydra 



Nycfotherus from 

 rectum of frog 



Podophrya with 

 tentacles 



Figure 32. Some ciliates of special interest. Kerona, a commensal which lives on the hydra. 

 Nyctothems, a parasite in the rectum of the frog. Vodophrya, ciliated only in young stages, but 

 the adult, as shown, has "tentacles." In feeding, the tubular tentacles are attached to its prey, 

 then the suctorian sucks the cytoplasm of its victim into its own body. 



Order 4. Peritricha. Body cilia generally 

 absent; adoral spiral zone wound 

 around the peristome. Body typ- 

 ically vase- or bell-shaped; 

 mostly stalked, often colonial. 

 Ex. Vorticella (Fig. 31). 

 Class 2. Suctoria. Cilia when young; "tenta- 

 cles" in adult stage. Adults attached 

 by stalk. Ex. Podophrya (Fig. 32). 



SELECTED COLLATERAL 

 READINGS 



Buchsbaum, Ralph. Animals Without Back- 

 bones. Univ. Chicago Press, Chicago, 1948. 



Carter, G.S. A General Zoology of the Inverte- 

 brates. Sidgwiek and Jackson, London, 1951. 



Grant, M.P. Microbiology and Human Prog- 

 ress. Rinehart, New York, 1953. 



Hutner, S.H., and Lwoff, A. Biochemistry and 

 Physiology of Protozoa, 2 vols. Academic 

 Press, New York, 1955. 



Hyman, L.H. The Invertebrates: Protozoa 

 Through Ctenophora. McGraw-Hill New 

 York, 1940. 



Jahn, T.L., and Jahn, F.F. How to Know the 

 Protozoa. W.C. Brown, Dubuque, Iowa, 

 1949. 



Kudo, R.R. Protozoology. Thomas, Springfield, 

 111., 1946. 



Wichterman, Ralph. The Biology of Parame- 

 cium. Blakiston, New York, 1953. 



