Protozoa Parasitic in Frogs. 593 



(3) Butschli, 0. — " Protozoa " in Bronn's Thierreich ii. and 



iii., 1883-1889. 

 (i) Dobell, C. C— " Trichomastix serpentis, n.sp.'' Quart. 



Journ. Microsc. Sci., vol. 51, 1907. 



(5) Dobell, C. C. — "Notes on some Parasitic Protists." Quart. 



Jour. Microsc. Sci., vol. 52, 1908. 



(6) Dobell, C. C— •' The Structure and Life History of Copro- 



monas subtilis, nov. gen., nov. spec." Qnar. Jour. Micr. 

 Sci., vol. 52, 1908. 



(7) Dobell, C. C. — " Researches on the Intestinal Protozoa of 



Frogs and Toads." Quar. Jour. Microsc. Sci., vol. 53, 

 1909. 



(8) Dobell, C. C. — " On the Intestinal Protozoan Parasites of 



Frogs and Toads." Proc. Cambridge Phil. Soc, xiv. (iv.), 

 1908. 



(9) Doflein, F. — Lehrbuch der Protozoenkunde, 1909. 



(10) Leger et Duboscq. — "Notes sur les Infusoires endopara- 



sites."' Arch, de Zool. Expe. et Gen., 1904. 



(11) Metcalf, M. M. — "The Excretory Organs of Opalina." 



Arch. f. Protistenk. Band x., 1907. 



(12) Metcalf, M. M.—" Opalina," Oberlin Coll. Lab. Bulletin. 



Number xv., reprint from Arch. f. Protistenk. Band 

 xiii., Heft. 3, 1909. 



(13) Saville-Kent.— A Manual of the Infusoria. 



(14) Zellei', E. — " Untersuchungen uber die Fortpflanzung und 



Entwicklung der in unseren Batrachiern schmarotzenden 

 Opaliuen." Zeitschr. f. wiss. Zool., Band xxix., 1877. 



EXPLANATION OF PLATES XCIY.-XCV. 



In all figures 



A.N. = Anterior nucleus. 

 ECTO. = Ectosarc. 

 ENDO. = Endosarc. 

 EXCR. = Excretory Organs. 

 M.N. = Macro-nucleus. 

 P.N. = Posterior nucleus. 



