58 MANUAL OF ZOOLOGY SECT, i 



into two sections, known as the protomerite (pr.\ and 

 deutomerite (deu.}, by a sort of partition, with, in the young 

 condition, a third division the epimerite (<?/.), in front ; 

 and in the more complex form of the cysts, which have 

 delicate canals or sporoducts (spd.} through which the spores 

 escape. Some of the Sporozoa (Cocddium and others) are 

 parasites, not like Monocystis and Gregarina, in the cavities 

 of organs, but in the interior of cells, such as the cells lining 

 the intestine of higher animals. The various forms of the 

 disease known as malaria in Man have been proved to be 

 due to the presence of a Sporozoan which invades, at a 

 certain stage in its life-history, the red corpuscles of the 

 blood. 



