Plate XVII 



Fig-. 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 in the south ravine, Bates woods, Station IV, d. 

 graph, T. L,. Hankinson.) 



(Photo- 



