BY THOMAS WHITELEGGE. 499 



RHIZOPODA. 



Order 1. PROTOPLAST A. 

 Sub-Order I. LOBOSA. 

 Amoeba, Ehrenberg. 



A. proteus, Rosel, Insecten-Belustigung. Niirnberg, 1755, III. 



622, Tab. CI. fig. A-T; Leidy, F. Rhiz. K Amer. p. 30, 



pi. I. figs. 1-8. 

 Frequent on the leaves of Lemna, Azolla, and Utricularia 

 Shea's Creek, and near Cook's River in a freshwater swamp. 



A. verrucosa, Ehrenberg, Die Infusionsthierchen, 1838, 126, Taf. 



vni. fig. xi.; Leidy, F. Rhiz. N. Amer. p. 53, pi. in. 



figs. 1-38. 

 This species is rather rare. I have seen specimens from only 

 one locality. On Sphagnum, Waterloo swamps. 



A. radiosa, Ehrenberg, Infus. 1838, 128, Taf. vni. fig. xiii. ; 

 Abh. Ak. Wiss. Berlin, 1830, p. 39 ; Leidy, F. Rhiz. N. 

 Amer. p. 58, pi. iv. figs. 1-18. 

 Abundant in nearly all the localities mentioned in this list. 



A. villosa, Wallich, Ann. and Mag. Nat. Hist. 1863, XL 

 p. 287, pi. vni. 



Very common on dead leaves and decaying vegetable matter. 

 The posterior villi are often hidden from view by the presence of 

 foreign materials such as sand, Desmids, and Diatoms. 



Shea's Creek, Waterloo Swamps, and near Cook's River. 



Pelomyxa, Greeff. 



_P. palustris, Greeff, Archiv fur Mikros. Anat. 1874. X. p. 51, 

 Taf. iii.-v. 

 I found this species in abundance on floating masses of 

 Oscillatoria, near Cook's River. It attains a very large size, some 

 specimens measuring ^ inch in length, ^ to ^ broad. 



