SPOROZOA 13 



new protoplasm divides into spores. This process, 

 repeated indefinitely, leads to the formation of large 

 masses composed of spores enclosed in the much dis- 

 tended parent cells. 



Neosporidia, e.g., Sarcosporidia. The Neosporidia are 

 too little studied to be fully considered at present. They 

 are divided into Myxosporidia, which occur in fishes and 

 in silkworms, and Sarcosporidia, which are very common 

 in the muscles of domesticated animals, and are rarely 

 found in man. They are known to cause one disease 

 in man, but recorded cases are rare. 



The parasite Rhinosporidium kinealyi described by 

 Minchin and Fantham, belongs to the Neosporidia. It 

 occurs in tumours of the septum nasi in natives of India. 

 The tumours are vascular pedunculated growths, in which 

 can be seen, as yellow points, bodies containing large 

 numbers of the parasites embedded in the connective 

 tissues. 



The youngest parasites consist of granular protoplasm 

 enclosed by a hyaline membrane and containing numerous 

 nuclei. As the parasite grows a thick capsule forms, and 

 from the layer of cells in contact with this, numerous 

 other cells are formed and pushed towards the centre. 

 The older cells increase in size and become multinuclear, 

 and the protoplasm segments into numerous uninuclear 

 pansporoblasts which, in their turn, give rise to numerous 

 spores. 



Nothing is known as to the method in which infection 

 is spread, and the diseases caused by them are not 

 common. 



The parasite has also been recorded by Beattie as 

 occurring in aural polypi, also in Indian natives. 





