148 



Mycologia 



Substrata : On bread, mule dung, potato. 

 Specimens examined : New York, Pennsylvania, Sumstine. 

 Illustrations: Karst. /. c. pi. 6; Fres. /. c. pi. i; Fischer, 

 /. c. f. 30. 



2. Calyptromyces circinelloides (Van Tieghem). 

 Mucor circinelloides Van Tieghem, Ann. Sci. Nat. VI. i : 94. 



1875 



The branches are circinate but all terminate with a sporangium. 

 This species seems to connect with the genus Circinella. Fischer 

 /. c. 205 describes the zygospores. 



Substrata: On bread. 



Specimens examined: New York, Pennsylvania, Sumstine. 

 Illustrations: Bainier, /. c. pi. y, f. p-13; Hagem, Unters. 

 Norweg. Mucor. i : 36. 



3. Calyptromyces erectus (Bainier). 

 Mucor erectus Bainier, Ann. Sci. Nat. Vl. 19: 207. 1884. 



This species differs from the preceding by the longer branches, 

 by the elliptic and unequal spores. Zygospores and azygospores 

 have been observed (see Bainier, /. c). 



Substrata : On ground flaxseed. 



Specimens examined: Pennsylvania, Sumstine. 



4. Calyptromyces plumbeus (Bonord.). 

 Mucor plumbeus Bonord. Abh. Naturf. Ges. Halle 8: 109. 1864. 

 Mucor spinosus Van Tieghem, Ann. Sci. Nat. VI. 4: 390. 1876. 



The spines growing on the top of the columella are very char- 

 acteristic of this species. The only other species known to have 

 a spinescent columella is Mucor spinescens Lendner. The latter 

 differs from the former in the smaller sporangiophores. 



Substrata : On beef broth, bread. 



Specimens examined: Pennsylvania, Sumstine. 



Illustrations: Fischer, /. c. f. 50 e; Bainier, /. c. pi. J, f. 1-8. 



5. Calyptromyces globosus (Fischer). 

 Mucor globosus Fischer, /. c. 202. 1892. 



This species was found by Walter Kerr, a student in the Pitts- 

 burgh High School, by exposing boiled potatoes for Mucor 

 spores. 



