DEVELOPMENT OF A MYXOSPORIDIAN 



343 



90m. Another individual measured 270/x long with a maximum 

 diameter of 60^. However, since they vary so greatly in shape 

 and, especially, in the length of the slender free portion of the 

 body, measurements can only give a very inaccurate idea of 

 the size (text figs. A and B). 



Text-figures A to D Various forms assumed by polysporous trophyozoites 

 afterjbeing removed from the urinary bladder. X 350. 



The body is covered with short hair- or bristle-like processes 

 of the ectoplasm which are larger and more abundant near the 

 free end (figs. 56 and 60 to 62) . These processes are similar to those 

 which cover the body of Myxidium lieberkuhni and the writer 

 has seen similar processes in several other species. They are 

 often well developed in Chloromyxum leydigi, common in the 

 gall bladder of many species of sharks and rays. While not 



