SAUCODINA 



1071 



of volutin and the granules increase in visability as encystment 

 proceeds. 



The cysts, like those of other amoebae, do not withstand drying 

 but they remain alive in feces or water for two or three weeks 

 without undergoing any further development. 



35 



37 



39 40 41 42 



FIG. 131. IODAMCEBA BuTSCHLii. Taken from Dobell as above. The numerals 

 on the plate are Dobell's figure numbers. Nos. 35 and 36 represent precystic 

 amoebae. Observe changes taking place in nuclear structure, freedom from 

 cytoplasmic inclusions, etc. No. 37 is an organism just encystic, volutin 

 granules, pink in cytoplasm, small clear space representing glycogen. No. 39 

 is a mature cyst, large red glycogen mass. Nos. 40, 41 and 42 are mature cysts 

 showing typical structure of nucleus, volutin granules and glycogen vacuole. 

 Nos. 41 and 42 are cysts of irregular shape often formed by this species and not 

 artifacts. Plate 11 of " Amoebae of Living Man" by Clifford Dobell, published 

 by John Bale, Sons & Danielsson, London. 



This parasite has been found in the healthy as well as in dysen- 

 tery cases and there is no evidence that it has any pathogenic 

 power, it disappeared under the administration of cmctin and in 

 this point alone resembles E. histolytica. 



