408 Philippine Journal of Science 



partment of obstetrics appreciation is due to Dr. Fernando Cal- 

 deron, chief of the department, and for opportunity to complete 

 it since my transfer to the department of pathology and bac- 

 teriology, to Dr. H. W. Wade. 



REFERENCES 



1. Conn, H. W. A Preliminary Report on the Protozoa of the Fresh 



Waters of Connecticut. Hartford Press, Hartford, Conn. (1905) 56. 



2. Dobell, C. Cytological studies on three species of ameba — A. lacertae 



Hartman, A. glebae n. sp., A. fiuvialis n. sp. Arch. f. Protistenk. 

 34 (1914) 142. 



3. Fantham, H. B., Stephens, J. W., and Theobald, F. V. The Animal 



Parasites of Man. London, John Bale, Sons and Danielsson Ltd. 

 (1916) 201. 



4. Faure-Fremiet, E. L'Ancystropodium maupasi (n. gen., n. sp.). 



Arch.f. Protistenk. 13 (1909) 121. 



5. Haughwout, F. G. The tissue-invasive powers of the flagellated and 



ciliated Protozoa with special reference to Trichomonas intestinalis. 

 A critical review. Philip. Journ. Sci. § B 13 (1918) 217. 



6. Ikeda, I., and Ozaki, Y. Journ. Coll. Sc, Imp. Univ., Tokyo, 40 



(1918) art. 6. Reviewed in Nature 102 (1918) 95. 



7. Kleine, E. Paramecium coli and Trichomonas in sewage. Brit. Med. 



Journ. 2 (1896) 1852. 



8. Sangiorgi, G., and Ugdulena, G. Ciliati nell' intestino umano. Path- 



ologica 9 (1917) 1. 



9. Saville-Kent, W. A Manual of the Infusoria. London, David Bogue 



(1881-1882) 579. 



10. Cited by Stein, F. Der Organismus der Infusionsthiere. Wilhelm 



Engelmann. Leipzig 2 (1867) 309. 



11. Stevens, Nettie M. Further studies on the ciliate infusoria Lichno- 



phora and Boveria. Arch. f. Protistenk. 3 (1904) 1. 



12. Walker, E. L. Sporulation in the parasitic ciliata. Arch. f. Pro- 



tistenk. 17 (1909) 296. 



13. Watson, M. E. A new infusorian parasite in sand fleas. Journ. 



Parasitol. 2 (1916) 145. 



