529 E. A. MINCHIN AND dH. B. FANTHAM. 
tion of the case, including the report of Major Vaughan, was 
published in the ‘ Proceedings’ of the Society for April, 
1903 (1). Later on a second report, with drawings of the 
clinical appearances of the growth, was sent by Major 
O’Kinealy and published in the Society’s ‘ Proceedings’ for 
December, 1905 (2). Since the original case seven or eight 
others had cropped up at the Medical College Hospital. 
Our acquaintance with this interesting parasite is due, in 
the first instance, to Dr. Hemington Pegler, Curator of the 
Laryngological Society, who directed the attention of one of 
us to the slide sent by Major O’Kinealy, belonging now to 
the cabinet of the Laryngological Society. Dr. Pegler kindly 
entrusted the slide to us for examination. Major O’Kinealy 
also, when communicated with, very kindly sent a second 
slide, the counterpart of that in the possession of the Laryn- 
gological Society. Both the sections mounted on these slides 
were made from material fixed in absolute alcohol, and had 
been stained in picrocarmine and mounted in Farrant’s solu- 
tion. From the Laryngological Society’s slide a photomicro- 
graph was kindly made for us by Mr. H. T’. Browne in the 
Research Laboratory of University College (Pl. 30). The 
second slide was unmounted, and the large section divided 
into smaller fragments, which were then restained in various 
ways and examined with the best Zeiss lenses. In this way 
we have been able to add to our knowledge of the parasite; 
but some points could not be made out clearly in our limited 
material, and it is to be hoped that a further examination of 
it will be made by observers in a position to obtain fresh or 
well-preserved material. From the published reports above 
referred to, these growths appear to be not uncommon in 
Calcutta among the natives. 
For the clinical account of the growths produced by 
this parasite we refer to the two memoirs (1, 2) by Major 
O’Kinealy. In this paper it is proposed only to describe 
the structure of the parasite so far as we have been able to 
make it out, and to discuss the affinities of the parasite with 
other Sporozoa and its position in the class. We propose 
