722 H. M. WOODroCK. 



general agreement Jilso, both it) regard to appearance and 

 size, between the trypanomonad forms iu cultures. The 

 reason which weighs most with me in keeping the two 

 parasites distinct is the different hosts and their different 

 distribution. Unfortunately Novy and McNeal do not 

 describe, as I consider, the definitive type of the parasite, and 

 so I am nnable to compare it with that of T. fringilli- 

 narum. Other reasons are that T. iavei-ani is said to 

 have a very sparse and slow growth in cultures, and the 

 cultnral forms themselves show very generally a peculiar 

 rod-like structure near the atiagellar end of the body. I 

 have certainly never seen this feature in any of the cultural 

 forms of T. f ringillinarum. 



5. Note on Haltekidium fringill.e (Labbe). 



I have already published a short paper (38) relating to the 

 chief features of interest Avhich I have observed in connection 

 with this parasite; and I do not propose to repeat in detail 

 the description there given, I wish, rather, to add here a 

 few general remarks and comments. 



I am now able to publish many of the actual drawings 

 from which the text-figures in my previous note were made ; 

 and these — especially the coloured figures — bring out certain 

 distinctive points very clearly. It is particularly in such a 

 case as this, I may say, that the value of the different tints 

 and depths of colour, produced by the Eomanowsky (Giemsa) 

 stain, is apparent. Firstly, in regard to the dimorphism of the 

 nuclear constituents (cf. especially tigs. 14, 15, and 17). The 

 smaller nuclear bod}^, representing the kinetonuclear element, 

 is seen to be quite distinct in its staining reactions from the 

 larger body, the ordinary nucleus. These two nuclear 

 portions correspond closely in appearance (leaving out of 

 account the marked difference between them as regards size) 

 to the trophonucleus and kinetonucleus of a trypanomonad 

 parasite, where these two organellie are close together or in 

 contact. 



