Macrosporium parasiticum , Thilm. 1 7 
the perithecia of Pleospora Sarcinulae l . These arose, accord- 
ing to the authors, from two cells or sometimes from a single 
cell of the moniliform hyphae. The cells swelled up and 
divided, division taking place in various ways, so that they 
finally formed spherical cellular bodies. In one case a 
short lateral hypha incurved over the two initial cells was ob- 
served, which also played a part in their further development 2 . 
They were in doubt whether there was really anything like 
a fecundation of oogonia by the action of a pollinodium in 
this case. 
In 1876, while Bauke 3 was engaged in the study of pycnidia 
of Sphaeriaceae, he met a doubtful case in Pleospora herb arum , 
which caused him to make a very large number of cultures. 
Thus he was led to study the other phases of its life-history at 
the same time. The preliminary communication 4 of the re- 
sults he obtained was published in the year following. It is 
to be regretted that he left the work unfinished. 
The conclusions he had arrived at were much nearer to 
Tulasne’s than to Gibelli and Griffini’s in regard to the ques- 
tion of pleomorphism. He included under Pleospora herbarum * 
besides an ascosporic stage, a pycnidial, Sarcinula -, Alter- 
naria -, and microconidial forms. The last form, according 
to him, has hitherto been overlooked in consequence of the 
minuteness of its size. 
He had some doubts about his pycnidia. He obtained 
them only twice in a very large number of the sowings of 
the ascospores. Though he failed to observe the direct 
organic connection between the latter and the pycnidia, he 
was convinced of the possibility of their connection by their 
peculiar forms, which at once distinguished them from all 
other pycnidia he knew of, and further by the fact that, by 
sowing the pycnospores, he obtained, besides the similar 
1 1. c. p. 82. 
2 1 . c. tav. vii. Figs. 8-10. 
3 H„ Bauke, Beitrage zur Kenntniss der Pycniden, i, in Nova Acta, Bnd. xxxviii. 
No. 5, p.443. Taf. 28-33. Dresden, 1876. 
4 H. Bauke, Zur Entwickelungsgeschichte der Ascomyceten. Vorlaufige Mitthei- 
lung, in Bot. Ztng. 1877, p. 313. 
C 
