ANIMAL PARASITES 7 



Mastigophora ("Flagellata") may also be found in abundance. 

 The larger tadpole-shaped individuals belong to the species Tri- 

 chomonas batrachorum, a genus represented among the parasites 

 of man. 



Endamoeba ranarum is a representative of the Rhizopoda 

 which is not uncommon in frogs. It very closely resembles some 

 of the amoebae of man. Under favorable conditions motile and 

 encysted forms may be found. 



Eimeria ranee is a sporozoan closely related to the coccidian 

 which causes fatal epidemics among rabbits and other mammals. 

 The oocysts of the E. ranoz may often be found in the contents 

 of the large intestine. 



Bladder. — Gorgoderincc. — Some half dozen species of flukes 

 belonging to the genera Gorgodera and Gorgoderina are to be 

 found in the bladder of frogs. 



Polystomum integerrimum. — This interesting fluke, charac- 

 terized by the possession of six suckers at the caudal end, is 

 common in the bladder of frogs in Europe. Related species are 

 occasionally found in our native frogs. 



Kidney. — Diplospora lieberkuhni and Leptothcca ranw are 

 sporozoans, which have been found in the kidneys of various 

 frogs. 



Directions for the preservation of parasitic worms and Protozoa 

 and for the preparation of permanent slides will be found in 

 the Appendix. 



References 



Cort, W. W., 1912. North American frog bladder flukes. Trans. Am. 



Micro. Soc, 30: 151-166. 

 Cort, W. W., 1915. North American frog lung flukes. Trans. Am. 



Micro. Soc, 34: 203-240. 

 Dobell, C. C, 1909. Researches on the intestinal protozoa of frogs and 



toads. Quart . Jour. Micro. Sci., 63 : 201-277. 

 Jewell, Minna E., 1916. Cylindrotsenia americana nov. spec, from the 



cricket frog. Jour. Parasitology, 2: 181-192. (Includes review of frog 



cestodes.) 

 Leuckart, R,., 1865. Zur Entwickelungsgeschichte der Ascaris nigro- 



venosa. Arch. Anat. Physiol, u. wiss. Med., 1865: 641-658. 

 Mecznikow, El., 1865. Ueber die Entwickelung von Ascaris nigrovenosa. 



Arch. Anat. Physiol, u. vnss. Med., 1865: 409-420. 

 Metcalf, M. M., 1923. The opalinid ciliate infusorians. U. S. Nat. 



Museum Bull. 120, 484 pp. 

 Xoller, W., 1913. Die Blutprotozoen des Wasserfrosches und ihre Uber- 



tragung. Arch. Protistenk., 31: 169-238. 



