New Fossil Fungus from Nebraska Pliocene 3 



Comparison with Cladosporites bipartitus Felix 



C. bipartitus C. ligni-perditor sp. nov. 



One-celled conidia — Absent Present 



Two-celled conidia, length 0102-.0119 mm. .0161-0253 mm. 



Two-celled conidia, width 0051-.0068 mm. .0069-.0115 mm. 



Hypha in both are the same, although more complete in c. 



Acknowledgments are due to Doctors Barbour, Bessey, and 

 Walker for suggestions, and for placing material and equipment 

 at the disposal of the writer. 



Explanation of Plate I 



Fig. I. Large hypha with conidiophores, a. 



Fig. 2. Large and small hypha, branching with one-celled spores, a and h. 



Figs. 3 and 4. Conidiophores. 



Explanation of Plate II 



Figs, i, 2 and 3. One-celled spores singly, and in chains. 

 Figs. 4, 5, 6 and 7. Two-celled spores. 



Fig. 4a, h and c. Showing one-celled spores produced by the breaking 

 apart of the two-celled forms. 



183 



