66 BRITISH FRESHWATER RHIZOPODA. 
116, and op. cit. III, an. 10 (1888), p. 91; Saccuz in 
Boll. Scient. IIT, an. 10 (1888), p. 41. 
Ameba radiosa Maaat i in Rend. R. Ist. Lomb. (2) IX (1876), 
p. 511, and in Boll. Scient. I, an. 2 (1880), p. 35. 
Astrameba radiosa VEmDovsky ‘in Sitz.-ber. K. Bohm. Ges. 
Wiss. 1880 (1881), p. 138, and Thier. Org. Brunn. Prag 
(1882), p. 36, t. i, £. 6. 
_Dactylospheria radiosum Birscaut in Bronn’s Thier-Reichs, 
1 (1880), t. i, £. 10. 
Dactylospheria radiosa Lanussan Traité Zool., Prot. (1882), 
p. 47, f. 34; Berconzinr in Atti Soc. Nat. Modena, 
Memor. (3) IT (1883), p. 73. 
Dactylospherium radioswum Burocamann Mikr. Thierw. Siiss- 
wass. (1886), p. 11, t. i, f. 10, and ed. 2 (1895), p. 14, t. 1, 
f.6; Frenze, Mikr. Fauna Argent. I, Prot. 1 (1892), 
p. 32, t.i, f. 5, and 4 (1897), p. 148, in Bibl. Zool. IV; 
Detace & Hirovarp Zool. concer. I (1896), p. 99, f. 106; 
TFrancé Result. Erfors. Balatons. II, 1 (1897), p. 6; 
Levawnper in Acta Soc. Fauna Fenn. XX (1901), no. 6, p. 5; 
G. 8. West in Journ. Linn. Soc., Zool. XXVIII (1901), 
p. 310, t. xxviii, ff. 4,5; op. cit. XXTX (1903), pp. 109, 118, 
t. xiii, ff. 1, 2; andin Amn. Scott. Nat. Hist. 1905, p. 81. 
Animal small and generally inactive, globular or 
oval in outline, and exhibiting three or more—in some 
individuals as many as six or eight—pseudopodia, 
which frequently take the form of immobile arm-like 
projections varying in length and degree of rigidity. 
They may be short and stumpy, tapering from a broad 
base, or elongated to several times the diameter of the 
body, of nearly equal width throughout and blunt at the 
apex, or long, straight, and tapering acutely. As a 
rule they radiate from all parts of the body-surfacé, 
and remain for long periods without perceptible 
change. In this condition the animal is quite passive, 
floating in the water or driven about by currents. The 
body consists of granular protoplasm, and when all 
the pseudopodia are withdrawn it may become sub- 
spherical or bluntly lobed ; or it may assume an active 
amoeboid phase, when it is hardly, if at all, distinguish- 
able from the smaller forms of wlmaba. proteus. Chloro- 
phyllous food is taken during the periods of activity. 
