MIESCHER'S CORPUSCLES 657 



tracheal tubes. Foul brood of bees was formerly supposed to be 

 caused by an aerobic bacillus forming large central spores (B. 

 alvei, Cheshire and Cheyne), but is now regarded as being due to 

 the B. pluton in the European disease, and to B. larvae in the 

 American disease. 1 



Order, Sarcosporidia 



The parasites belonging to this order are not thoroughly 

 worked out. They complete their life -history in the substance 

 of striated muscular fibres : such are the well-known Miescher's 

 corpuscles. Few instances of this class of parasite are recorded 

 in man, but it occurs in the monkey 2 and also in the ox. T. 

 Smith * describes the characters and development of a species 

 found in mice. 



A parasite, Ehinosporidium Tcinealyi. nearly allied to the fore- 

 going, causes a polypoid condition in the nose in the tropics. If 

 a section be made of the mass, cysts (pansporoblasts) will be seen 

 in the deeper layers containing many refractile rounded nucleated 

 bodies, the spores. Neither the life-history nor the mode of 

 transmission of the parasite is known. 



1 See U.S. Dept. Agriculture, Bulls. 809 and 810. 



2 De Korte, Journ. of Hygiene, vol. v, 1905, p. 451. 



3 Journ. Exper. Med., vol. vi, No. 1, 1901, p 1. 



M.B. 42 



