84 THE ANIMAL PARASITES OF MAN 



1892, xii., p. 859]. Posadas, A., " Psorospermiosis infest, generalizada " [In.- 

 Diss., Buenos- Aires, 1894] ;" Ensayo sobre una nuova neoplasia del'hombre . . . " 

 Buenos-Aires, 189798. Rixford, R., and T. C. Gilchrist, "Two Cases of 

 Protozoan [Coccidial] Infection of the Skin and other Organs " [Johns Hopkins 

 Hosp. Rep., 1897, i., pp. 209, 269, 291] ; ref. in C. f. B., P. u. I., 1897, i, xxi., 

 p. 812. Also Blanchard, R. 3 Les coccid. et leur role pathog., Paris, 1900). 



(3) An observation of Jurgens appears to me to be still less attribut- 

 able to coccidia. At the autopsy of a patient who died in the Charite in 

 Berlin, greyish-yellow growths were found on the dura mater cerebralis 

 and spinalis, as well as on the cauda equina ; the walls of the calices and 

 renal pelvis were thickened and similarly discoloured, but not those of the 

 ureters and bladder. In the neoplasms, which were but slightly vascular, 

 various shining bodies were found, of which some resembled myelin and 

 some starch grains, and some of which had shells. A few experimental inocu- 

 lations were undertaken on rabbits, several of which soon died from pleuro- 

 pneumonia ; one exhibited after four months a rapidly-growing proliferation 

 of the left eye. At the autopsy of this animal, which died a month later, 

 medullary tumours were found not only in the eye and orbit, but also in the 

 lungs, kidneys, epididymis and glands of the mesentery ; the peritoneum was 

 greatly affected. The little bodies regarded as protozoa were not lacking ; 

 but in consequence of their very diverse shape they can hardly be looked 

 upon as independent organisms, but they probably appertain to those pro- 

 ducts of the organism which frequently occur in proliferations, and have 

 been repeatedly described as parasites (Jurgens, " Ueber Erkrank. d. Protoz. 

 b. Menschen." [Bert. klin. Wochenschr., 1895, xxxii., p. 331]). 



(4) It is advisable to mention here that the " psorosperm cysts," men- 

 tioned in the last edition of this book (p. 81), and which are supposed to 

 play a part in the diseases of the urethra and the pelvis of the kidney, 

 have been assigned to their proper place, especially by Lubarsch and 

 Ribbert ; they are metarmophoses of cells of the epithelial nests, which are 

 present normally, especially in the urethra (cf. Radtke, E., " Beitr. z. Kenntn. 

 d. Uret. cystica," in Diss. Kcnigsberg i. Pr., 1900). 



(5) Seven's " Monocystide Gregarines." The pulmonary parenchyma of a 

 stillborn child was found by Severi to be infiltrated with numerous oval, 

 reddish little bodies, the size of which varied in length between O'OO3 

 and 0-030 mm., and in breadth between o - ooi5 and 0*015 mm. They were 

 surrounded by a thin investing membrane, and mostly lay free in the 

 tissue ; the smallest ones lay also in the epithelial cells and in the blood- 

 vessels. The largest parasites exhibited a granular plasm, and occasionally 

 an eccentrically situated nucleus the size of a red blood corpuscle (Severi, A., 

 " Gregarinosi polmon. in Infante natomorto " [Rif. med. } 1892, ii., p. 54 ; 

 Boll. Accad. med. Genova, 1892, vii., No. 2]). 



Order 3. Hcemosporidia. 



In the same manner as our knowledge of the development of the 

 coccidia has advanced during recent years, so the same has occurred with 

 the Haemosporidia. The first communications (i) respecting the parasites 

 inhabiting the blood or rather the blood corpuscles of vertebrates, remained 



