TRIOHOMASTIX SEKPENTIS. 457 



LiTEKATDRE ReEEKENCES. 



1. Blociimann, F. — "Bemerkungen liber einige Flagellateu," ' Zeitsclir. f. 



wiss. Zool.,' xl, 1884., p. 42. 



2. BiJTSCiiLr, O. — "Protozoa, II," iu Broim's 'Tierreich,' 1SS3-S7. 



3. Doi'LEiN, ¥. — 'Die Protozoen als Parasiteu u. Kranlilieitserreger,' Jena 



1901. 



4. GiiAssr, B. — " Sur quelques Protistes eiidoparasites," ' Arch. ital. de 



Biol.,' ii, 18S2, p. 402, and ill, 1SS3, p. 23. 



5. Hammehschmidt, C. E.- — " Neues Entozoon im Harn der Sciilangeu," 



Heller's 'Arch. f. pliys. u. path. Chem. u. Mikrosk.,' 1844, p. 83. 



6. Laveran, a., et Mesnil, F. — "Sur la morphologic et la systematique 



des Plagelles a membrane ondulante (genres Trypanosoma, Gruby, 

 et Trichomonas, Donne), 'O.K. Acad. Sci. Paris,' cxxxiii, 1901, 

 p. 131. 



7. PiiowAZEK, S. — " Unlersucliungen iiber einige parasitische Plagellaten," 



' Arb. aus dem Kaiserl. Gcsundheitsanile,' xxi, 1904, p. 1. 



8. Saville-Ivent, W. — 'A Manual of the Infusoria,' London, 1880 — 1882. 



9. Stiles, C. W. — "The Type-species of certain Genera of Parasitic Flagel- 



lates, particularly Grassi's Genera of 1879 and 1881," ' Zool. Anz.,' 

 XXV, 1902, p. 689. 



EXPLANATION OF PLATE 27, 



Illustrating Mr. C. Clifford Dobell's paper on ''Tricho- 

 uiastix serpeutis, n. sp." 



[The drawings from the living animal were all made under a Zeiss 2'5 mm. 

 water immersion apochromatic objective (apert. 1"25). Those from stained 

 preparations (Figs. 11, 12, 13, and 15) under a 3 mm. oil immersion (apert, 

 1*40) by the same maker. Compensating oculars, Nos. 2, 6, 12, and 18, were 

 employed.] 



Fig. 1. — Living Trichomastix serp cutis, showing details of structure. 

 At the upper end is seen the large vesicular nucleus, upon which lies the 

 basal granule of the fiagella. The axial rod is seen supporting the basal 

 granule and fiagella; and passing backwards, in relation to the nucleus, it 

 traverses the whole length of the body and terminates in the caudal process. 



