148 BRITISH FRESHWATER RHIZOPODA. 



Genus 29. COCHLIOPODIUM Hertwig & Lesser, 



1874. 



Amoeba (pars) AUERBACH in Zeits. wiss. Zool. VII (1885), 



p. 374. 

 Amphizonella (pars) GREEFF in Arch. mikr. Anat. II (1866), 



p. 328. 

 Cochliopodium HERTWIG & LESSER in Arch. mikr. Anat. X 



(1874), Suppl. p. 66. 



Test rudimentary, consisting of a thin, flexible, 

 chitinous envelope, capable of expansion and contrac- 

 tion in response to the movements of the organism ; 

 multiform, and, as a rule, very minute ; plain or 

 covered with extremely fine hair-like processes ; the 

 plasma colourless, emitting variously-formed pseudo- 

 podia (blunt or pointed, but not acicular), in certain 

 species visible in lobular or continuous expansions round 

 the test, its finely drawn-out edges being jagged or 

 serrated. Chlorophyllous particles sparingly occupy- 

 ing the finely-granular endoplasm, with, in some species, 

 minute crystalline particles. 



1. Cochliopodium digitatum (Greeff) Calkins. 

 (Plate XXXI, figs. 21-23.) 



Amphizonella digitata GREEFF in Arch. mikr. Anat. II 



(1866), p. 328, t. xviii, f. 18. 

 Amoeba brevipes GREEFF? in Arch. mikr. Anat. II (1866), 



p. 321, t. xviii, f. 17. 

 Amoeba tentaculata GRTJBER in Zeits. wiss. Zool. XXXVI 



(1882), p. 460, t. xxx, ff. 1-8; CALKINS Protozoa (1901), 



p. 38, f. 12 A (p. 39). 

 Cochliopodium digitatum CALKINS Protozoa (1901), f. 13 B 



(p. 41) ; PENARD FauneEhiz. Leman (1902), p. 190, ff. 1-5 



(p. 191) ; AVERINTZEV in Trudui S.-Peterb. Obshch. 



XXXVI (1906), 2, p. 139 ; SCHOUTEDEN in Ann. Biol. 



Lacustre, I, 3 (1906), pp. 331, 332, f. 2. 



Body in the initial stage spherical or sub-spherical, 

 covered with a fine transparent envelope ; its changes 

 of outline rapid and multiform ; pseudopodia being 



