XV. STUDIES ON INFUSORIA. 



By Ekendranath Ghosh, M.Sc, M.D. 



I. On a new species of A^wplophya, Stein, emend. CErEDE. 



The genus AnopJo'jjhya, Stein, as restricted by Cepede (2) may be 

 diagnosed as follows :- — Infusoria with flattened ribbon-shaped body 

 (cylindrical in one species) entirely and uniformly covered with cilia 

 arranged on longitudinal striae close to one another (rarely distant) ; 

 no cytostome ; with well defined macro- and micro-nuclei ; c. v. in 

 single or double longitudinal rows, or rarely scattered, or very rarely 

 absent. Division by transverse fission, sometimes with formation of 

 chains {i.e., with satellites) due to incomplete and retarded separation 

 of the daughter individuals. Endoparasites of various annelids. 



Anoplophrya lloydii, sp. nov. 



The species may be diagnosed thus : Elongately oval with sub- 

 truncate posterior end ; curved longitudinally with the dorsal side con- 

 vex and the v^entral concave ; macronucleus irregularly ribbon-shaped, 

 extending to nearly the whole length of the animal ; micronucleus small, 



Fig. 1. — Anoploiilirya lloyiii, sp, nov. 



spherical, placed at the side of the macronucleus ; c. v. 3, on the 

 right side. In seminal vesicles of an earthworm {Pheretima jQosthvma). 

 Unfortunately the measurements are not noted. 



The species comes nearest to A. slriata in many respects. 

 Up to the year 1915, the number of well recognised species of Ano- 

 jjlophrya was IG, making a total of 17 with the present one. 



These species of Ano2ilo]jh ya may be tabulated in the following 

 synopsis : — 



a. No c. V. 



a^. Body elongately oval, pointed anteriorly, truncate (when with satellites) 

 or tapering and pointed posteriorly; niacionucleus ribbon-shaped, 

 with a knobbed end. 



1. A. mav.pasi, Cei>ede (2), p. 411. 



b^ Body ovoid or uniform ; rounded anteriorly, swollen and acuminate 

 posteriorly ; only 4 or 6 longitudinal ciliary striae ; macronucleus 

 spherical or ovoid, in posterior body half. 



2. A, rnininia, Leger and Duboscq (3) ; 

 Cepede (2). 



d2 



