AM@BA GUTTULA. 59D 
t. xiul, ff. 17,18; Czmrwyin Arch. f. Mikr. Anat. V (1869), 
p- 162; Tarem in M. Micr. Journ. I (1869), p. 352; 
Fromente, Htudes Microz. (1874), p. 847, t. xxiv, ff. 2, 
3, 5; Giza in Herause. Ungar. Nat.-Mus. Budapest, I 
(1877), p. 165; Birscu1t in Bronn’s Thier-Reichs, I, 1 
(1880), t.ii, f. 3: Coorg in J. Quek. Micr. Club, vii (1880), 
pp. 105, 106; Parona in Boll. Scient. I, an. 2 (1880), 
p- 24, and J. c. an. 4 (1882), pp. 51, 56; Saccur in Boll. 
Scient. III, an. 10 (1888), p. 41; Pewarp in Mém. Soc. 
Phys. Genéve, XXXI, no. 2 (1890), p. 182, t. ili, f£. 2; in 
Rey. Suisse Zool. VII, 1 (1899), p. 100; and Faune Rhiz. 
Léman (1902), p. 38, ff.; Lona: in Atti Soc. Ligust. V 
(1894), p. 14; Scuewiaxorr in Mém. Acad. Impér. 
Pétersb. (7) XLI, no. 8 (1893), p.5; Raumpizr in Arch. 
f. Entwick. VII (1898), pp. 118, 126, 139. 
Amba guttula Macetin Rend. R. Ist. Lomb. (2) IX (1876), 
p- 541. 
Hyalodiscus guttula BuocumMann Mikr. Thierw. Siisswass. 
(1886), p. 10, t. 1, f. 8, and ed. 2 (1895), p. 12, t. i, f.1; 
Detace & Hirovarp Zool. concr. I (1896), p. 99. 
Guttulidiam guttula Frenzut Mikr. Fauna Argent. I, Prot. 
4 (1897), p. 146, in Bibl. Zool. IV. 
In general character resembling A. limicola, but 
shorter and broader in proportion to the length ; 
during active movement ovoid and narrowed pos- 
teriorly, without any caudal protuberance, but in place 
of this with a few minute, nipple-like dentations occa- 
sioned by a contraction of the ectoplasm at that point. 
Movement effected by wave-like expansions of the 
ectoplasm, anterior or lateral. The granular endo- 
plasm contains a variable number of crystalline and 
other particles, and occasionally minute diatoms. The 
anterior ectoplasm is faintly bluish or hyaline; the 
whole organism is transparent; the nucleus and con- 
tractile vesicle are normally situated, the former 
rounded, but susceptible of modification. 
Dimensions : Length 30-35 «; breadth 20-25 u. 
In ponds, amongst submerged vegetation, frequent. 
This species was removed by Blochmann to Hertwig 
and Lesser’s genus Hyalodiscus, but there is really no 
