THE NEOSPORIDIA 429 



regularity with which the sporozoite in the Neosporidia has the form 

 of an amoebula, as contrasted with the equally-constant gregarinula- 

 fonn of the Telosporidian sporozoite. The characters implied in 

 the terms Amoebogeniae and Rhabdogeniae appear to be more 

 diagnostic of the two groups than any other. There can be little 

 doubt, therefore, that the union of the Telosporidia and Neosporidia 

 in one class the Sporozoa is a quite artificial arrangement, and 

 that the two subclasses in question show distinct affinities, and are 

 descended from distinct ancestral forms the Telosporidia from 

 Flagellata, the Neosporidia from Sarcodina. 



Bibliography. For references see p. 449. 



