AMCEBA LIMAX. 57 



8. Amoeba Umax Dujardin. 

 (Plate III, fig. 1.) 



Amiba Umax DUJARDIN Infus. (1841), p. 235 ; CEEVIER in 

 Nat. Canad. VII (1875), p. 276. 



Amoeba Umax PERTY Kenntii. kleiust. Lebensf. (1852), 

 p. 188, t. viii, f. 12 ; PRITCHARD Hist. Infus. new ed. 

 (1852), p. 203, and ed. 4 (1861), p. 549, t. xxii. ff. 4, 5 ; 

 AUERBACH in Zeits. f. wiss. Zool. VII (1856), p. 414, 

 t. xxii, ff. 11-16; CARPENTER Foram. (1862, Ray Soc.}, 

 p. 25; TATEM in M. Micr. Journ. I (1869), p. 352 ; TRIN- 

 CHESE in Mem. Ace. Bologna, V (1875), p. 524; GEZA 

 in Herausg. Ungar. Nat.-Mus. Budapest, I (1877), p. 165 ; 

 BUTSCHLI in Bronn's Thier-Keichs, I, 1 (1880), t. ii, f . 2 ; 

 Mikr. Scliaume (1892), p. 72, t, i, ff. 10, 11; and (Engl. 

 transl.) Micr. Foams (1894), p. 106, t. ii, ff. 7, 8; COOKE 

 in J. Quek. Micr. Club, VI (1880), p. 105; FDLLAGAR in 

 Sci. Goss. 1880, p. 204, f . 134 ; PARONA in Boll. Scient. I, 

 an. 2 (1880), pp. 46, 48; VEJDOVSKY Thier. Org. Brunn. 

 Prag (1882), p. 33, t, i, f. 1 ; CATTANEO in Boll. Scient. Ill, 

 an. 10 (1888), p. 93; PENARD in Mem. Soc. Phys. Geneve, 

 XXXI, no. 2 (1890), p. 124, t. ii, ff. 1-5 ; in Arch. Sci. 

 Phys. XXVI (1891), p. 137; in Rev. Suisse Zool. VII, 1 

 (1899), pp, 13, 100; and Faune Rhiz. Leman (1902), 

 p. 35, ff. ; ZOJA in Rend. R. 1st. Lomb. (2) XXIV (1891), 

 p. 987; SCHEWJAKOFF in Mem. Acad. Imper. Petersb. (7) 

 XLI, no. 8 (1893), p. 5; DELAGE and HEROUARD Zool. 

 concr. I (1896), p. 93, f. 96; RHUMBLER in Arch. f. 

 Entwick. VII (1898), p. 118 (et passim), ff. 30, 31; 

 CALKINS Prot. (1901), p. 80. 



Hyalodiscus Umax BLOCHMANN Mikr. Thierw. Siisswass. 

 (1886), p. 10, t. i, f. 4, and ed. 2 (1895), p. 12, t. 1, f . 2 ; 

 ISSEL in Atti Soc. Ligust. XII (1901), pp. 146, 149; 

 LEVANL>ER in Acta Soc. Fauna Fenn. XX (1901), no. 6, p. 5. 



Saccamceba Umax FRENZEL Mikr. Fauna Argent. I, Prot. 4 

 (1897), p. 147, in Bibl. Zool. IV. 



Body elongated, slug-like, narrowed at the posterior 

 extremity, where the j>lasma is more concentrated and 

 rough, with a rounded protuberance, which in rapid 

 movement develops a radiating fringe of very delicate 

 substance. This fringed protuberance Penard regards 

 as distinctive of the species. The body broadens 



