FILARIA IN THE CROW. 65 



third tapers gradually until it reaches about one half the width 

 of the anterior end, when it is abruptly rounded. In the fresh 

 condition no sheath could be made out nor does it show in prep- 

 arations stained with fuchsin, but with hsematein a sheath is well 

 defined extending however only slightly beyond either the head 

 or tail. 



In stained preparations .05 of the anterior end is clear ; at 

 .37 from anterior end and extending to .4 there is in most 

 specimens a paler spot in which there are few nuclei ; at .6 

 from the head end, and extending to .7 there is a clear spot 

 in all the specimens in which no nuclei are seen, and little 

 or no stain is taken. This spot and its fixed position is 

 characteristic of this embryo, and clearly distinguishes it from any 

 filaria which has been previously described. At this spot in the 

 stained specimen the diameter is 5.8 microns, as compared with 

 4.7 microns at the blunt end, and 3.4 microns at the tapered end. 



I hope very shortly to give a detailed description of this new 

 filaria, and the embryos found in the circulating blood. 



GRAVENHURST, ONT. , 

 October 16, 1902. 



