130 BRITISH FRESHWATER RHIZOPODA. 



n.s. (1877), p. 107, t. viii, ff. 1-3 ; BUCK in Zeits. f. wiss. 

 Zool. XXX (1878), pp. 5, 12 ; MAGGI in Atti Soc. Ital. 

 XXI (1878), pp. 314, 319, and in Boll. Scient, I, an. 2 

 (1880), p. 35 ; BUTSCHLI in Bronn's Thier-Reichs, I, 1 

 (1880), t. ii, f. 8; LANESSAN Traite Zool., Prot. (1882), p. 51, 

 f. 39 ; PARONA in Boll. Scient, I, an. 4 (1882), pp. 52, 56; 

 BLOCHMANN Mikr. Thierw. Siisswass. (1886), p. 12, t. i, 

 f. 15, and ed. 2 (1895), p. 15, t. i, f. 11; CATTANEO in Boll. 

 Scient, III, an. 10 (1888), p. 91 ; SACCHI in Boll. Scient. 

 Ill, an. 10 (1888), p. 44; LONGI in Atti Soc. Ligust. V 

 (1894), p. 17; DELAGE & HEROUARD Zool. concr.I (1896), 

 f. 122; CALKINS Prot, (1901), f. 13 c ; PENARD in Rev. 

 Suisse Zool. IX (1901), p. 238, and Faune Rhiz. Leman 

 (1902), p. 180, ff., and p. 666 ; CASH in Journ. Linn. 

 Soc,, Zool. XXIX (1904), p. 218. 



Ampliizonella flara G-REEFF in Arch. f. mikr. Anat. II (1866), 

 p. 329, t. xviii, f. 19; CREVELLI and MAGGI in Rend. R, 

 1st. Lomb. (2) III, p. 369; TRIPP in Proc, Bristol Nat. 

 Soc. n.s. IY (1870), p. 19; MAGGI in Atti. Soc. Ital. XXI 

 (1878), p. 314. 



Test discoid, generally circular, concave, in the 

 young state hyaline and flexible, becoming rigid and 

 brown with age ; sometimes, in the latter condition, 

 punctated on the convex surface, or, according to 

 Archer, presenting an appearance of faceting or 

 shagreening, " due to little rounded, closely-posted, 

 scattered scrobicu'li." The flexibility of the test, when 

 young, is shown by its assuming a variety of forms, 

 being at one moment discoid, at another folded in upon 

 itself, wholly or partially, or rolled together scroll-like. 

 A short finger-like pseudopod is sometimes protruded 

 from between the folds. Xucleus central ; contractile 

 vesicles several, peripheral. 



Dimensions : Diameter of test 40-45 /x. 



Amongst submerged vegetation (e. g. Hypnum 

 fluilans} in ponds, and amongst Sphagnum-. In 

 Cheshire ponds abundant, chiefly in the spring months, 

 associated with Microgromia socialis. 



The variations of figure of the test of Pseudochlamys, 

 when young, correspond with the activities of the 

 animal. There is a close attachment of the plasma- 



