202 MEDICAL MYCOLOGY 



ance; margins not lobulate, blastospores often thick-walled, similar to arthrospores, others 

 ovoid or irregular, sometimes pyriform and suggesting conidia, often very large [7-10^]. 

 Pseudomycelium well developed, hyphae little branched, flexuous, not easily breaking apart, 

 ends of cells flattened, cells filled with fine oil globules. Terminal cell of hypha variable, 

 often a chlamydospore of variable form, rarely a chain of chlamydospores ; coremia abundant; 

 verticils more or less regular, composed of a few pyriform blastospores. 



Langeron & Talice made Monilia Tcrusei Cast, the type of their genus Geotrichoides, but 

 since they claim that the type culture of Candida vulgaris Berkhout is congeneric with this 

 species, Geotrichoides falls into synonymy with Candida Berkli. excl. syn. 



MYZELOBLASTANON 



MyseloUastanon Ota, Derm. Woch. 78: 216-237, 260-264, 1924. 



No type species was designated in the original description which is very difficult to inter- 

 pret. The author states that he is proposing the genus to cover the blastosporic species of 

 Monilia and immediately proceeds to divide it into three subgenera. He then uses specific 

 names with his subgeneric names as if he considered them genera and Myseloblastanon as a 

 tribal designation, making the combinations Blastodendrion Krausi, B. Arzti, Myzelorrhizoides 

 cutaneum, and M. Gruetsi. When he next treated the genus monographically in his Champ. 

 Paras. Homme (1928), he no longer recognized liis subgenera and combined all his species 

 under the name MyzeloMastanon. Should we consider Myzeloblastanon validly published in 

 1924? A strict interpretation of the International Rules of Nomenclature would deny such 

 publication, as the specific epithets were not formally combined with the new generic name. 

 The intent of the author is not clear. On the other hand, shall we accept Blastodendrion as 

 validly published in 1924? The combinations of specific with generic names are formally 

 made, but the author distinctly states that he is proposing the name as a subgenus. The 

 intent of the author is equally doubtful. If we decide to drop both names as a permanent 

 source of error in 1924, we are troubled equally. In 1925 Ciferri & Eedaelli formally proposed 

 Blastodendrion as a new genus, making the proper new combinations, but in the same year 

 Ota proposed another species, M. Favrei. This latter species differs from the others in show- 

 ing racquet mycelium suggestive of some species of Zymonema and if it be taken as the type of 

 Ota's Myselohlastanon, would exclude all the other species included in it by Ota and other Jap- 

 anese workers subsequently. In 1928 Ota, in his Champ. Paras. Homme, treats the genus mono- 

 graphically, figuring several of the more important species, including M. Krausi, M. Arzti, M. 

 cutaneum, M. Favrei. A study of all these species leads me to place them in Blastodendrion 

 as used by Langeron & Talice (1932) who first thoroughly studied the morphology of the 

 group, although they proposed B. intermedium as the standard species of their genus Blasto- 

 dendrion. 



Whether one uses Myzeloblastanon or Blastodendrion for this group of organisms, one 

 will probably find equally careful authors using the other name, and putting forth equally 

 sound arguments for its usage. In view of the fact that the more careful morphologic 

 work has been done on Blastodendrion, while even in his later treatments Ota has still included 

 very diverse elements, in this work I shall use Blastodendrion and consider MyzeloMastanon 

 a synonym. For further discussion of type and description of tlie genus see Blastodendrion. 



BLASTODENDRION 



Blastodendrion Ota, Derm. Woch. 78: 216-264, 1924; Ciferri & Eedaelli, Atti 1st. Bot. 

 E. Univ. Pavia HI, 2: 129-146, 1925. 



The type species is Blastodendrion Krausi Ota. 



Since a culture of B. Krausi was not available, Langeron & Talice (1932) chose B. 

 intermedium Ciferri & Ashford as the type of the genus. 



