1918. J E. Ghosh; Studies on Infusona. 131 



a*. Body elongaloly oval ; Icngtii equal to or less tlian twice the breadth : 

 longitudinal ciliary striae at distant intervals ; macronucleus with lateral 

 expansions and approaching the concave face ; fusiform micronucleus 

 placed obliquely near the left border. 



14. A. utrial'i, Duj. 



b^. Body elongately oval with subtruncate posterior end ; longitudinal 

 striae close ; macronucleus iriegularly ribbon-shaped ; micronucleus 

 spherical and placed at the sidt; of the macronucleus ; C. V. 3, on the 

 right side. 



15. ^-1. lloydii, n. sp. 

 b'. Body sti'aight in profile. 



a^. Body oval in shape ; C. V. 10 in number. 



1(3. A. aegifensis, Cepedo (2), p. 54;{. 



b^. Body irregularly oval, tapering and rounded anteriorly, wide and trun- 

 cate posteriorly ; C. V. 2, on one sitle, one in the middle and one near the 

 posterior end ; macronucleus irregularly oval, placed transversely ; 

 longitudinal striae close. 



17. A. simplex, Andre (1). 

 Insufficiently described species : — 



1. A. sociaUs, Leidy. Oval, cordioform, fusiform or globular in shape; 



C. V. numerous. 



2. .4. notei, Foulke, 1885 (J we/-. ./. Sci. XXIII, pp. 377-378), resembling A 



socialis, but without ciliary striae, cilia long and mucli thickened. 



LITERATURE. 



1. Andre.— i^ev. Suiss. Zool, Vol. XXIII (1915), p. 102. 



2. Cepede.— ^fcA. Zool Paris, ser. 5, Vol. Ill, pp. 341-609, 1910. 



3. Leger and Duboscq. — C. R. Acad. Sci., Vol. CXLVIII, p. 365. 



4. Kent, — A Manual of Infusoria, 1880-1882, 



5. PiERANTONi.— ^rcA. Pfotist., Vol. XVI, 1909, pp. 81-106. 



6. ScHEWiAKOFF.— Mew, Ac. St. Petersby., Vol. VII (i), pp. 379-382. 



II. Two NEW SPECIES OF ConchojjJuhirus, Stein. 



The genus Conchophthirus, Stein, may be diagnosed by the following 

 characters : Body coloui'less and non-contractile, strongly compressed, 

 generally oval in shape (sometimes elongated), with ventral sm'face 

 usually more convex than the dorsal and somewhat notched in the 

 ventral region ; right side (back) more arched than the left ; peristome 

 a cup-shaped, funnel-shaped or short tubular cavity, sometimes pro- 

 longed into a long, recurved, tubular cytopharynx (non-ciliate) ; ciliary 

 striae distinct ; cilia uniform, moderately long and mostly tufted, some- 

 times a strong adoral zone in the anterior peristomial margin. C. V. 

 mostly one, subcentral or postero-terminal, macronucleus spherical 

 oval, or irregularly triangular, one, rarely seven in number, subcentral 

 or terminal. Anus terminal. Ectoparasites in mantle chamber of 

 various molluscs. 



The genus included 3 species in Kent's Manual of Infusoria (1880- 

 1882), viz. : — C. anodontae, C. steenstrwpei and C. ciirtes. Plagiotoma 

 acuminata Clap, and Lach. seems to be identical with C. anodontae. 



Biitschli (2) in Protozoa, Broun's Thierreich (p. 1720) included three 

 more species : C. actinarium [Plagiotoma actinarium Clap. (5)], C. magna 

 [Tillina magna, Gruber (7)] and Plagiopijla nasuta var. marina Gourret 

 and Rocser (6). The first species is now made the type of a new genus 

 FoetUnycria by Caullery and Mesnil (3) and is also noted by Andre (1), 



