2 Henry B. Ward 



' In Februar}', 1902, Dr. W. F. Milroy, of Omaha, brought me 

 a specimen in alcohol which he had just removed from the eye 

 of a patient and which he believed to belong to the rare and in- 

 teresting African species, Filaria loa. He expressed a desire that 

 I make a more precise examination of the specimen and that our 

 results be included in a joint communication. The study of this 

 specimen demonstrated that it was in fact Filaria loa and dis- 

 closed some interesting features in the anatomy which, together 

 with Dr. Milroy's clinical observations, were presented before 

 the American Association for the Advancement of Science in 

 1902. Circumstances have delayed the appearance of the final 

 paper beyond all expectation, and meantime a contribution by 

 Looss ( 1904) has dealt with the anatomy of this species so fully 

 as to cover all the points I had worked out. Indeed the admir- 

 able work of this author sets the nmits for anatomical studies 

 for many years to come. Accordingly, the part of this contri- 

 bution dealing with the anatomy has been reduced to a brief 

 summary. 



Since this preliminary contribution, I have been fortunate 

 enough to secure the data on several other cases in the United 

 States which have not yet been published, and have had an op- 

 portunity to study six other specimens which have been sent me 

 for that purpose. To all the genciemen who have contributed so 

 generously of their material and have cooperated so unselfishly 

 in securing data on this interesting parasite, I desire to return 

 here my sincere thanks. For these cases I have given the de- 

 scription largely in the precise words of the observer to whom 

 I am indebted for the record. The more extended notes of Dr. 

 Milroy are included in a separate section of this paper. 



Through the courtes}' of Dr. B. C. Loveland, formerly of 

 Clifton Springs, but now of Syracuse, New York, I am able to 

 give the following account of several interesting cases. In two 

 he removed the parasites himself and one of these, that taken 

 from the eye of Mrs. J., I have been privileged to study this 

 summer. Of the identity of this specimen there can be no doubt, 

 and in the other case the evidence is strongly in favor of its in- 

 terpretation also as F. loa. The location and date lead me to 



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