316 



H. B. FANTIIAM. 



a superficial resemblance to Critliidia (Legcf) and some 

 species of Herpetomonas (vide Woodcock [11, p. 208, 

 fig. 38]). Similar forms have been observed in different 

 species of Piroplasma, often without "nuclear dimorphism" 

 having been noticed therein. Such free forms of Piroplasma 

 bigeminum are certainly very interesting, more especially 

 to those parasitologists who attach great weight to the obser- 

 vations of Schaudinn ([9], p. 438) on blood-films pi-epared by 

 Weber at night from a cow kept in the dark, and dying of 



Text-figs. 37—44. 



40 



42 



o o 



43 44 



piroplasmosis, wherein a small Trypanosomc was found 

 accompanying P. bigeminum. Trypanosome-like (trypaui- 

 form) bodies were also found in old films of Kossel and 

 Weber made from the contents of the digestive tract of ticks, 

 which had fed on cows suffering from piroplasmosis. How- 

 ever, the inference that Piroplasma possesses a trypaniform 

 stage is not in the Icnst supported by the researches of Koch 

 on P. bigeminum and V. parvum (1) from the gut of 

 ticks, nor by the work of Kleine (2) on culture forms of 

 P. can is. Kleine also carefully searched for flagellate stages 

 in the blood of infected dogs, without success. 



llegarding the chromatin of free rounded forms (text- 

 figs. 43, 44) it closely resembles in distribution that of 

 similarly shaped intra-corpuscular forms, and needs no further 

 couiment. 



