EUGLENOIDINA, CHLOROMONADINA 



307 



Genus Trentonia Stokes. Bi-flagellate as in the last genus; but 

 flattened; anterior margin slightly bilobed. One species. 



T. flagellata S. (Fig. 124, c). Slow-moving organism; encystment 

 followed by binary fission; about 60ju long; fresh water. 



Genus Thaumatomastix Lauterborn. Colorless; pseudo podia 

 formed; 2 flagella, one extended anteriorly, the other trailing; holo- 



Fig. 124. a, Gonyostomum semen, X540 (Stein); b, Vacuolaria virescens, 

 X460 (Senn); c, Trentonia flagellata, X330 (Stokes); d, Thaumatomastix 

 setifera, X830 (Lauterborn) 



zoic; perhaps a transitional form between the Mastigophora and the 

 Sarcodina. One species. 



T. setifera L. (Fig. 104, d). About 20-35/* by 15-28/*; fresh water. 



References 



Allegre, C. F. and Jahn, T. L.: (1943) A survey of the genus 



Phacus Dujardin. Tr. Am. Micr. Soc, 62:233. 

 Balech, E.: (1944) Trachelomonas de la Argentina. An. Mus. 



Argent. Cien. Nat., 41:221. 

 Chen, Y. T.: (1950) Investigations of the biology of Peranema tri- 



chophorum. Quart. J. Micr. Sc, 91:279. 

 Conrad, W.: (1932) Flagellates nouveaux ou peu connus. III. Arch. 



Protist., 78:463. 

 (1934) Materiaux pour une monographic du genre Lepo- 



cinclis. Ibid., 82:203. 



(1943) Notes protistologiques. XXVIII. Bull. Mus. Roy. 



d'Hist. Natur. Belgique, 19, no. 6. 

 da Cunha, A. M.: (1913) Sobre um novo genero de "Euglenoidea." 

 Brazil Medico, 27:213. 



