144 BIOLOGY OF THE RICHMOND RIVER, 



podia were smooth and very faint, in the smallest (diam. 7 />t) only 

 15/x long, but even so, tlie\^ had the characteristic attenuate 

 shape. (PI. viii., f.l6). 



Yar. EiCHHORNii mihi 



Diam. corp. 80-240; pseudopodia long, ad 160 /t. 



Lismore (IG). 



Actinosphcr.ruLin Eichlwrnii is merely the mature form of 

 Actinophrys sol. Minute forms of the latter (var. simplex Schau- 

 dinn, supra) have solid bodies; in well grown specimens of Actino- 

 sphcerium, the whole is composed of large cells; while, in the 

 type, the body is a mass of small cells, with larger ones making 

 their appearance on the surface. The pseudopodia are similar in 

 every case. 



Amceba verrucosa. (PI. viii., f.l7). 



Long. circ. 50-60 /x. The usual size in this country. 



Lismore (11, 12). 



With var. quadrilineata (Carter) mihi (Syn. A. quadrilinenta 

 Carter), showing four longitudinal lines. There are always four, 

 neither more nor less. The contractile vesicle is generally yqyj 

 distinct in this species, as it only discharges at considerable 

 intervals. It is almost always at the extreme end. 



Var. LiMAX C? Duj.) mihi. (PI. viii., f.l8). 



Long. circ. 30, lat. circ. 10 /x. 



K}'ogle (41). Cum prioribus duabus. 



I consider this a minute form of A. verrucosa, on account of 

 its mobility, its straightforward movement, the distinct con- 

 tractile vesicle, and the broad edging of ectosarc at the anterior 

 end, all of which are characteristic of that species. In shape, it 

 is cuneate. 



Var. MAXIMA, n.var. (PI. viii., f.l9). 

 Formse typicis consimilis sed maxima. Long. 1 20, lat. 90 fx. 

 Casino (14). Twice as large as the type. 



Amceba radiosa var. minutissima, n.var. 

 Diam. max. pseudop. inch 20-30, diam. corp. 4-8 /x. 

 Lismore (7, 12, 15). 



