516 PROTOZOOLOGY 



groove at anterior end; cytostomc at ventral end of the groove; 

 cytopyge terminal; concretion vacuole mid-ventral, contractile 

 vacuole posterior to it; cilia on groove, posterior end and mid- 

 ventral region. 



S. pellucidulus H. (Fig. 237, e). 33-56m by 30-40^; in faeces of 

 mule. 



Genus AUoiozona Hsiung. Cilia in 3 (anterior, equatorial and 

 posterior) zones; in caecum and colon of horse. 



A. trizona H. (Fig. 237,/). 50-90m by 30-60/z. 



Genus AmpuUacula Hsiung. Flask-shaped; posterior half 

 bearing fine, short cilia; neck with longer cilia, in caecum of 

 horse. 



A. ampulla (Fiorentini). About 110/x by 40/x. 



References 



Hsiung, T. S. 1930 A monograph on the Protozoa of the large 

 intestine of the horse. Iowa St. Coll. Jour. Sci., Vol. 4. 



Kahl, a. 1930 In Dahl's Die Tierwelt Deutschlands. Part 18. 



KiRBY Jr., H. 1934 Some ciliates from salt marshes in California. 

 Arch. f. Protistenk., Vol. 82. 



NoLAND, L. E. 1925 A review of the genus Coleps with descrip- 

 tions of two new species. Trans. Amer. Micr. Soc, Vol. 44, 



1937 Observations on marine ciliates of the Gulf coast 



of Florida. Ibid., Vol. 56. 



Penard, E. 1922 Etudes sur les Infusoires d'eau douce. Geneva. 



Roux, J. 1901 Faune infusorienne des eaux stagnantes de en- 

 virons de Geneve. Mem. cour. fac. sci. I'Uni. Geneve. 



Stokes, A. C. 1888 A preliminary contribution toward a history 

 of the freshwater Infusoria of the United States. Jour. 

 Trenton Nat. Hist. Soc, Vol. 1. 



Wenrich, D. H. 1929 The structure and behavior of Actinoholus 

 vorax. Biol. Bull., Vol. 56. 



