238 The Sarcodina 



Fig. 5. 26. A-F. Vahlkampfia punctata (Dangeard) Chatton and Lalung- 

 Bonnaire: amoeba stained to show nucleus (A), xl710; stages in mitosis, 

 showing division of the endosome and other features (B-F), x3420 (after C. 

 & L-B.). G. Astramoeba Stella Schaeffer in active locomotion, x875 approx. 

 (after S.); compare with floating stage of A. flagellipodia (Fig. 5. 25, E). H. 

 Mayorella conipes Schaeffer, showing conical pseudopodia which do not 

 direct locomotion; xll55 approx. (after S.). I. Trichanweba pallida Schaef- 

 fer, a marine type showing typical uroid; xllOO approx. (after S.). J-M. 

 Amoeba proteus (Pallas) Leidy average length about 600 fi): amoeba in loco- 

 motion, showing typical pseudopodia and ectoplasmic ridges (J); broad (K) 

 and narrow (L, M) aspects of typical discoid nuclei (after Schaeffer). N-P. 

 Amoeba dubia Schaeffer (average length usually about 400^^): typical amoeba 

 (N), polar and lateral views (O, P) of the elongated nucleus (after S.). 



