Plate XN^II 



Figr. 1. General view of the ravine with temporary stream, which bounded the 

 Bates woods on the south. Station IV. d. (Photograph, T. L. Hankinson.) 



Fig. 2. A pool in the temporary stream iu the south ravine. I'.au-^ woods. Station IV, ./. (Photo- 

 graph, T. L. Hankinson.) 



