H. M. Woodcock 
153 
that you found a Trypanosome in the blood of the sheep. Since the 
Trypanosomes change over into Crithidiae in the digestive tract of 
Insects, it would not be surprising if experiment should reveal the fact 
that G. meloj^hagia is got from the blood of the sheep.” 
From what I have shown above, therefore, two things will be clear 
to those who are really interested in the Zoological Record. In the 
first place, there is no truth in the assertion that my opinions on the 
subject are extreme; on the contrary, they agree with the view which 
most workers on it hold. Secondly, I am correct in having used and 
in continuing to use the terms Grithidia and Herpetomonas in inverted 
commas, when applied to parasites from blood-sucking Insects, signifying 
thereby that, according to our present knowledge, such forms are in all 
probability not to be regarded as belonging to truly independent genera, 
but are merely developmental phases of some Trypanosome. At any 
rate, I have received the assurance of the Secretary of the Zoological 
Society and of others on the matter. A Recorder is allowed the use of 
his own judgment in the case of debated points; and I can truthfully 
say that I endeavour to keep mine unbiassed and to compile the 
Protozoa division of the Record in accordance with the general tendency 
of opinion. 
In conclusion I have only to say that the above justification is not 
intended as a personal reply to Miss Porter. As between Protozoologists, 
the only comment I should make upon her note would be in terms very 
similar to those in which I referred to Capt. Patton’s “ criticism ” of my 
article on the Haemoflageliates, in my paper on Avian Haemoprotozoa, 
p. 715. 
