60 
BRITISH FRESHWATER RHIZOPODA. 
p. 271; Parona in Boll. Scient. I, an. 2 (1880), pp. 46, 
48; Saccur in Boll. Scient. III, an. 10 (1888), p. 41. 
Ameba terricola Gresrr in Arch. f. Mikr. Anat. (1866), 
p. 300, t. xvili; in Verh. Nat. Ver. Rheinl. XVII (1870), 
p- 201; and in Biol. Centralbl. XI (1891), p. 599; Trip 
in Proce. Bristol Nat. Soc. n.s. [V (1870), p. 14; Gacriarv1 
in Q. J. Micr. Sci. XI, ns. (1871), p. 80; Bivscwir in 
Arch. f. Mikr. Anat. IX (1873), p. 676, t. xxi, f. 21; 
Magai in Rend. R. Ist. Lomb. (2) X (1877), pp. 318, 321; 
Scunuiper in Compt. Rend. LXXXVI (1878), p. 1557 ; 
Du Puxzssis in Bull. Soc. Vaud. (2) XVI (1879), pp. 166, 
325; Lanugsan in Rey. Internat. Sci. VI (1880), p. 8, and 
Traité Zool. I (1882), p. 42; Parona in Boll. Scient. I, 
an. 2 (1880), p. 46; GruseR in Zeits. f. wiss. Zool. XL 
(1884), p. 123; BuerraoLp Stud. Protopl.-mech. (1886), 
p. 109; Biocumann Mikr. Thierw. Siisswass. (1886), 
p. 10, t. 1, f. 9, and ed. 2 (1895), p. 13; Bryer Vie psych. 
in Psych. expér. (1888, 1891), p. 235; and (Hngl. 
transl.) Psych. Life (1889), p. 114; Curves Cap. Horn 
Zool. VI (1889), Prot. p. 20; Saccur in Boll. Scient. III, 
an. 10 (1889), p. 67; Herrwic Lehrb. Zool. 1 (1891), 
p. 149, and (Engl. transl. ed. 1900) Man. Zool. (1903), 
pp. 186, 189; Grirrrtas Physiol. Invert. (1892), p. 375; 
Lone in Atti Soc. Ligust. V (1894), p. 15; Prnarp 
Faune Rhiz. Léman (1902), p. 104, ff., and p. 666. 
Thecameba quadripartita FrommnreL Etudes Microz. (1874), 
p. 346, t. xxxviul, f. 3. 
Ameba verrucosa Macat in Atti Soc. Sct. Nat. XIX (1876), 
p. 407, t. ix, ff. 1-8; in Rend. R. Ist. Lomb. (2) IX (1876), 
p. 541; and in Boll. Scient. I, an. 2 (1880), pp. 34, 81. 
Ameba papillata Muruscuxowsxy in Arch. f. Mikr. Anat. 
XVI (1878), p. 203, t. xi, ff. 81, 32. 
Saccameba verrucosa Frunzet Mikr. Fauna Argent. I, 
Prot. 1 (1892), p. 4, t. iv, ff. 1, 2, and 4 (1897), p. 146, 
in Bibl. Zool. IV. 
Body of the animal, when at rest, roughly spherical, 
oval, sub-quadrangular, or multilobate, always more 
or less rugose or verrucose. Forward movement 
effected by extensions of short anterior pseudopodia, 
or by broad wave-like expansions of the ectoplasm, 
which changes are accompanied by a wrinkling of the 
surface, resulting in the production of more or less 
regular longitudinal striations, very fine but distinctly 
