AM(EBA FLTJIDA. VJ 



Gruber first found this species in sea- water ; it has 

 been recorded from Switzerland by Penard, and it 

 occurs in the United States. 



2. Amoeba granulosa Gruber. 

 (Vol. I, Plate I, fig. 3 ; PI. Ill, fig. 2.) 



Amoeba proteus 



LEIDY (pars), Freshw. Ehiz. N. Amer. (1879), p. 35, pi. i, f. 9. 

 Amoeba granulosa 



GRUBER in Zeits. wiss. Zool. XLI, 2 (1884), p. 218, pi. xv, f. 46. 



PENARD Faune Rhiz. Leman (1902), pp. 46-47, 3 figs., in Proc. R. 

 Soc. Edinb. xxv, 8 (1905), pp. 595, 598; Sarcodines in Cat. Invert. 

 Suisse (1905), p. 14. 

 Amoeba proteus var. granulosa 



CASH Brit. Freshw. Rhiz. I (1905), pp. 47-48, pi. i, f. 3 ; pi. iii, f. 2. 



WAILES in Jrn. Linn. Soc., Zool. XXXII (1913), p. 202. 



Body attaining a considerable size, the plasma of 

 a dark colour due to large numbers of fine included 

 granules, sometimes also containing green bodies but 

 seldom other inclusions ; the form usually elongate 

 with few or no lateral, lobose processes ; nucleus large, 

 single, spherical, granular; contractile vesicles one 

 or sometimes two in number. 



Length up to 400 /x or 500 /u, seldom less than 

 100 fi. 



Habitat. Ponds, ditches, etc. Not common. 



This species is adequately represented by Cash in 

 Vol. I, Plate I, fig. 3, and PL III, fig. 2, the latter 

 figure being the form perhaps most often seen ; its 

 dark colour, usually large size, and the rapid stream- 

 ing of the fine granules with which the plasma is 

 crowded render it conspicuous and easily recognized. 



The spherical nucleus also serves to distinguish it 

 from A. proteus, which has an ovoid one ; Penard states 

 that many of the small granules under a high magni- 

 fication can be recognized as small bicuspid crystals. 



When moving, the hinder part is usually terminated 

 by a tufted or mulberry-shaped extremity, as stated 

 by Cash. 



