PARASITISM OF PROTOZOA IN CARCINOMA. 187 



returned along the back of the castle hill down the winding alleys 

 of the old town of Hyeres. 



In the afternoon of the same day (January 13) I left Hybres, 

 gathering a few flowers of the little wild marigolds while waiting 

 for the train as a last piece of collecting The following morning, 

 on the homeward journey, day broke with a leaden, sunless sky, 

 showing that I was no longer in the "Sunny South," and that my 

 " Midwinter Month " had come to an end. 



^be Iparaeitism of Iprotosoa in Carcinoma/' 



By James Galloway, A.M., M.D, Aber., 

 RR.CS. Eng., M.R.C.P. Lond. 



Protozoa as Parasites in Animals : Type, the Coccidium 



OviFORME IN Rabbits. 



AS is now well known, the organisms which have been so fre- 

 quently mentioned of late in connection with carcinoma 

 belong to the division of the protozoa ; and if I devote part 

 of the time at my disposal to the study of a disease characterised 

 during part of its course by the formation of tumours occurring in 

 one of the lower animals, and undoubtedly caused by a certain 

 protozoon, I shall carry out one of the suggestions of Sir James 

 Paget, who pointed out that much light may be thrown on the 

 formation of tumours in man by the study of growths in other 

 organisms, and at the same time fulfil the purpose in my mind, 

 when I commenced this inquiry, of obtaining a clear idea of some 

 of the characteristics of the class of micro-organism which is now 

 suggested as the cause of cancer. 



I'he animal which I have chosen as the type of those infested 

 by protozoa is the rabbit, principally because the life-history of the 

 parasite, which is the cause of the disease, is very completely 

 known, and may be looked upon as typical of many others allied 

 to it in organisation. This affection of rabbits is brought about 



* Abstracted from TJie British Medical Journal, by permission of the 

 editor, to whom also we are indebted for the loan of the illustrations. 



