150 



Mycologia 



first discovery in 1886. This second species was found in 1902. 

 It differs principally in the smaller elliptic spores, smaller zygo- 

 spores, and depressed columella. Azygospores and chlamydo- 

 spores are rather abundant. 



Substrata: On sterilized bread. 



Specimens examined: Pennsylvania, Sumstine. (Only in 

 laboratory cultures.) 



Illustrations: Lendner, /. c. f. 2^. 



Additional Genera 

 The following genera have been established somewhat recently 

 by European authors but no species of these genera have yet 

 been reported for America. An enumeration of these genera 

 may interest students of the American Mucoraceae. 



1. Pirella Bainier, Ann. Sci. Nat. VL 15: 84. 1882. 

 Type species, Pirella circinans Bainier. 



The zygospores are unknown. It is very near the genus 

 Circinella. 



2. Dicranophora Schroet. Jahresb. Schles. Ges. Vaterl. Cultur. 

 64: 198. 1886. (Not available.) 



Type species, Dicranophora fidva Schroet. 

 This species has been found only by Schroeter, on Paxillus 

 involutus. 



It may be recognized by the principal sporangia with central 

 columella and numerous spores and by the sporangioles on dichot- 

 omous branches with forked columella and few spores. The 

 zygospores have very unequal suspensors. 



3. TieghemeUa Berlese & De Toni ; Sacc. Syll. Fung. 7: 215. 

 1888. 



Type species, Absidia rep ens Van Tieghem. 

 The zygospores are unknown. 



4. Mycocladus Beauverie, Ann. de Univer. de Lyon 162-180. 

 1900. 



Type species, Mycocladus verticillatus Beauverie. 

 This has been placed by Lendner in the genus Absidia although 

 the zygospores do not have the cuticularized threads or filaments. 



5. ProabsidiaYuiWemm, Bull. Soc. Myc. Fr. 19: 116. 1903. 

 Type species, Mucor Saccardoi Oudemans. 



