Sumstine: North American Mucorales 



151 



The zygospores have the characters of the genus Absidia. 



6. Lie htheimia Ymllemm, Bull. Soc. Myc. Fr. 19: 126. 1903. 

 Type species, Mucor corymbifer Cohn. 



The zygospores have not been observed. 



7. Parasitella Bainier, Bull. Soc. Myc. Fr. 19: 153. 1903. 

 Type species, Parasitella simplex Bainier = Mucor parasiticus 



Bainier. 



The specific name has been changed in the transfer to the 

 new genus. The zygospores are not known. 



8. Glomerula Bainier, Bull. Soc. Myc. Fr. 19: 154. 1903. 

 Type species, Glomerula repens Bainier. 



From the description and figure, this seems very different from 

 the other known Mucors. 



9. Pseudo- Absidia Bainier, Bull. Soc. Myc. Fr. 19: 155. 1903. 

 Type species, Absidia dubia Bainier. 



The specific name is changed to Pseudo- Absidia vulgaris 

 Bainier. This is generally referred to the genus Absidia. 



The Schweinitz Collection of Mucors 

 In his Synopsis of North American Fungi, Schweinitz lists 

 under the genus Mucor seventeen species, Nos. 2'/'26-2'/42, as 

 follows, Mucor fimetarius, rufus, fiavidus, Mucedo, ascophorus, 

 tenuis, carneus, minimus, tenellus, caninus, stercoreus, murinus, 

 Fimbria, albo-virens, truncorum, capitato-ramosus, echinophila; 

 under Thamnidium, one species, No. 2^43, Thamnidium elegans; 

 under Pilobolus, two species, Nos. 2222-2228, Pilobolus crystal- 

 linus, roridus. 



All these numbers are missing in the Herbarium of the Acad- 

 emy of Sciences, Philadelphia, and therefore further considera- 

 tion is out of the question. 



There are some unnumbered packets in this herbarium that 

 belong to the Schweinitz collection. The specimens were pre- 

 sumably collected by him. The following is a list of these speci- 

 mens with my notes. 



1. Mucor rufus. No specimen in the packet but the label 

 reads ''Mucor rufus in Boleto." This was probably Syzygites 

 aspergillus. 



2. Mucor minimus. The name tenellus also appears on the 



