IDENTITY OF AMERICAN AND FRENCH SPOROTRICHOSIS 121 
these photographs are conclusive on this point and show that 
no doubt a change occurred later in these cultures resulting 
in a strain bearing fewer spores. Spore formation is extreme- 
ly variable as de Beurmann and Gougerot admit. Further- 
more in their monograph they state that the white pleo- 
morphic forms—those approaching the type of Sporotrichum 
schenckti—are very poor in spores, certain ones becoming 
entirely devoid of them. I wish again to emphasize this point 
as practical proof that changes did result in this strain from 
the time it was first described and the time, some seven years 
later, when it was sent to de Beurmann by Hektoen. Further- 
more, de Beurmann and Gougerot write ** that Hektoen stated 
in his letter when transmitting the culture that it seemed to 
have lost its power of producing spores as compared with the 
preceding generations. This, I believe, is definite proof of a 
change which no doubt occurred on artificial media and which 
these writers have used to differentiate the Sporotrichum 
beurmanni from Sporotrichum schencku. Original organisms 
and original descriptions should be compared for this pur- 
pose, not organisms changed through growth on artificial 
media. 
As to chlamydospores, de Beurmann and Gougerot state 
that Sporotrichum beurmanm forms them while the Sporotri- 
chum schenckii does not. Matruchot also makes this state- 
ment. I discussed this matter in a special paper some time 
ago”’ and showed that, at least under certain conditions, the 
Sporotrichum schenckii readily forms typical chlamydospores. 
This was especially true on media poor in nutrient material. 
K. F. Meyer?* confirmed my results in this respect noting 
chlamydospore formation not only in the original Sporotri- 
chum schenckii but also in the many strains of sporotricha 
which he isolated from horses in the United States. 
With reference to the arrangement of mycelial filaments, 
it may be stated that this is a property decidedly pleomorphic, 
and with the appearance of the pleomorphic alterations noted 
4 Bull. et. Mem. de la Soc. Med. des Hop., Paris, 35, p. 745, 1910. 
% Jour. Inf. Dis., 15, p. 4838, 1914. 
* Jour. of Inf. Dis., 16; pe 399, 1915, 
