234 PROCEEDINGS OF THE AMERICAN ACADEMY. 



appeared, in his opinion, to be so closely related to the form described 

 by Preuss that he placed it in the same genus; since it was, however, 

 not associated with chlamydospores like those of Sepedonium, but 

 with an Aspergillus-like fructification, he named it P. aspergilliformis. 

 Two kinds of bulbils were described as connected with this fungus, 

 which resembled each other in color but differed in their mode of 

 development. Of these two types, one is said to be large, sclerotium- 

 like, without any differentiation into central and cortical cells, while 

 the other is small and consists of several large central cells surrounded 

 by a row of colorless cortical cells resembling those of Helicosporan- 

 gium parasiticum, mentioned in the same paper. 



In connection with this fungus Eidam described conidia which, 

 he states, were produced on exceedingly delicate, colorless, conidio- 

 phores resembling somewhat those of Aspergillus alhus Wilhelm, 

 but the sterigmata are usually Mask-shaped. These conidia were also 

 borne individually on the sides of ordinary hyphae, being abstricted 

 in chains from flask-shaped sterigmata and resembling those described 

 by Eidam as associated with the form which he referred to Helico- 

 sporangium parasitica m . 



"Chlamydospores" were also described by Eidam in connection 

 with his P. aspergilliformis. "This form of reproduction," he says, 

 "seems to be by far the most common one connected with Papulo- 

 spora and often is the only one. I have found, in great abundance, 

 mycelia with only chlamdospores and no trace of bulbils or conidio- 

 phores." On account of the presence of these chlamydospores which 

 rcs< ruble the spores of Acremoniella, Lindau ('07) has redescribed this 

 species under the name of Eidamia acremonioides Harz. The criti- 

 cism that was offered as to the reliability of Eidam's investigation of 

 Helicosporangium may equally well be applied here. Bainier C07) 

 is of the opinion that he mistook the conidia of Acremoniella atra 

 Sacc. (Acremonium atrum Corda) for chlamydospores belonging to 

 Papulospora, as these two species are often found associated with each 

 other. 



Bainier ('07) found a fungus abundantly on straw, paper, cardboard, 

 etc., which he calls P. aspergilliformis. His description of the conidia 

 and conidiophores is practically the same as that given by Eidam ('83). 

 His fungus, however, does not produce acremonium-like chlamydo- 

 spores, as did that of Eidam, but, on the other hand, developed pari- 

 thecia with long necks, which he refers to the genus Ceratostoma. 

 The asci, which are very transitory, even disappearing before the 

 maturity of the spores, are ovoid with eight simple brownish spores 



