71 



Statoblasts of Freshwater Polyzoa. A, Fredericella sultana x 38 ; B. PlumatelJa 



repens X 38 ; C, Lophopus crysfallinus X 28 ; D, Cristatella mucedo X 28. 



['The Cambridge Natural History.'] 



Fio;. 22. 



A, Plumatella repens, partly free, partly incrusting stem of water-weed. 

 B, Cells magnified. (After Allman.) 



