162 



COLLEGE ZOOLOGY 



single row of cells. Ex. Trichi- 

 nelld spiralis (Fig. 83). 



Phylum Nematomorpha or Gordiacea, Very 

 long slender cylindrical worms; gonoducts in 

 both sexes enter the intestine; lateral nerve 

 cords absent. Parasitic as juveniles, adult free- 

 living. Ex. Paragordius (Fig. 81). 



Phylum Acanthocephala. Parasitic; without 

 intestine but with spiny proboscis. Ex. Lep- 

 torhynchoides thecatus (Fig. 85). 



SELECTED COLLATERAL 

 READINGS 



Baer, J.G. Ecology of Animal Parasites. Univ. 

 of Illinois Press, Urbana, 111., 1952. 



Chandler, A.C. Introduction to Parasitology. 

 Wiley, New York, 1955. 



Chitwood, B.C. and others. An Introduction 

 to Nematology. Monumental Pub. Co., 

 Baltimore, 1950. 



Goodey, T. Plant Parasitic Nematodes. Dut- 

 ton,'New York, 1933. 



Hull, T.G., and others. Diseases Transmitted 

 from Animals to Man. Thomas, Springheld, 

 111., 1946. 



Hyman, L.H. The Invertebrates: Acanthoce- 

 phala, Aschelminthes and Entoprocta. Mc- 

 Graw-Hill, New York, 1951. 



Pearse, A.S. Introduction to Parasitology. 

 Thomas, Springfield, 111., 1942. 



Shipley, A.E. "Nemathelminthes." Cambridge 

 Natural History, Vol. 2. Macmillan, London, 

 1896. 



