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 

 schenckii 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 do Beurmann by Hektoen. Further- 

 more, de Beurmann and Gougerot write 24 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 Sporotriclium 

 bcitrmanni from Sporotrichum schenckii. 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 beurmanni 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 2 -"' 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 26 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 



21 Bull. et. Mem. de la Soc. Med. des Hop., Paris, 35, p. 745, 1910. 

 *Jour. Inf. Dls., 15, p. 483, 1914. 

 26 Jour, of Inf. Bis., 16, p. 399, 1915. 



