— 212 — 



scarcely germinate when they are separated from it. In Tulasnella 

 helicospora I have never seen a separating partition between the 

 swollen base of the sterigma and the basidium, and if Juel's figures 

 be examined, it will be found that what Juel interprets as spores 

 are not in so much as one single case, separated from the basidium 

 by a transverse wall, not even in those cases where the »spores« 

 have already germinated, and formed a »conidium«. 



If however, it be asserted that these formations are spores, 

 which, — since they are not intended to fall, but germinate directly 

 sessile on the basidium — , are not, and do not require to be, separ- 

 ated from the basidium by a wall, we can only reply that there is 

 no evidence in the material to hand, nor even, any probability, that 

 such an interpretation is correct. The case would be different if 

 transition forms could be shown: for instance, species resembling 

 Tulasnella, but with transverse walls between the swollen base 

 of the sterigmata and the basidium. But I do not regard it as likely 

 that such forms exist. On the other hand, I should not be surprised 

 if forms resembling Tulasnella were found, with basidia longitud- 

 inally divided in four, as in the Tremellineæ. Meanwhile, Tulasnella 

 must disappear from the ranks of families and orders, 

 and be placed within the Thelephoraceæ near the primitive 

 forms af Corticieae. 



Bibliography. 



Johan-Olsen, O., (1889), Pachysterigma n. g. in Brefeld's Untersuchungen 

 aus dem Gesammtgebiete der Mykologie, Heft 8, Pag. 5. 1889. 



Juel, H. O., (1897), Muciporus und die Familie der Tulasnellaceen. ßihang 

 till K. Svenska Vet.-Akad. Handlingar. Bd. 23. Afd. III. Nr. 12. 1897. 

 — (1914), Berichtigung über die Gattung »Muciporus«. Arkiv för Bota- 

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Maire, R., (1902), Recherches cytologiques & taxonomiques sur les Basidio- 

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Patouillard, N., (1388), Prototremella, nouveau genre d'Hyménomycètes 

 hétérobasidiés. Journal de Botanique. Tome II. 1888. Pag. 267—270. 



Rosenvinge, L. Kolderup, (1913), Sporeplanterne. 1913. 



Schroeter, (1889), Die Pilze Schlesiens. Cohn's Kryptogamen-Flora von Schle- 

 sien. Bd. 3. Erste Hälfte. 1889. 



Tulasne, (1872), Nouvelles notes sur les fungi tremellini et leurs alliés. 

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