BY R. GKEIG SMITH. 595 



Bouome (7) found the parasite in the urine of sheep suffering 

 from parasitic ictei'o-haematuria. Against the view that the 

 tick carries tlie parasite directly from the ground to the animal. 

 are the experiments performed in America and Queensland, (4) 

 showing that a strained watery emulsion of crushed larval ticks 

 does not produce the disease. If these experiments are to be 

 trusted as indicating a fact, viz., that on or in the larval tick 

 there are no cattle parasites, there only j'emains the probability 

 that the cattle parasite i.s matured in the body of the tick from 

 an alternative form which nuiy be called the tick parasite. This 

 view is the one at present held, being engendered by these experi- 

 ments and also perhaps on account of some similarity between 

 Texas fever and malaria. 



LITERATURE. 

 1. — Theobald Smith, Centralblatt ftir Bakteriologie, 1 Abt. xiii. 511. 

 2. — Stakcovici, Centralblatt ftir Bakteriologie, 1 Abt. xiv. 1. 

 3. — Celli and Santori, Centralblatt fiir Bakteriologie, 1 Abt. xxi. 561. 

 4. — Sidney Hunt and Collins, Report on Tick Fever, 1896. 

 5. — Sidney Hunt, Queensland Agricultural Journal, Vol. iii. Part 3. 

 6. — NicoLLE and Adil Bey, Annales de 1' Institut Pasteur, xiii. 336. 

 7.— ScHNEiDEMUEHL, Die Protozoen als Krankheitserreger, 18PS. 

 8. — Wasielewski, Die Sporozoen, 1896. 



