University of MicJiigan 



PLATE 11. 



Figure I. Tlje lower part of Maggie Creek. The photograph was 

 taken in July and shows the normal size of the stream during the sum- 

 mer months. The flat valley may be seen in the background. In the creek 

 or in the immediate vicinity were found Scaphiopns hammondii, Rana 

 pretiosa liiteiventris, TJiainnophis ordinoides elegans, Sceloporus gra- 

 ciosus, Bascanion taeniatum, Bascanion constrictor vetustum and 

 Pituophis catenifer deserticola. 



Figure 2. The valley of James Creek, on the basin floor. The pho- 

 tograph was taken from the mountains and shows the ridges of waste 

 which form the sides of such valleys on the basin floor, and the scanty 

 growth of trees which borders- the permanent streams. The reptiles and 

 amphibians on the bottom of the valley are Scaphiopus hammondii, Bufo 

 boreas, Sceloporus graciosus (fine soil at mouth of valley), Sceloporus 

 biseriatus (occasional on rocks along stream), Crotalus lucifer, Bas- 

 canion taeniatum, Bascanion constrictor vetustum and Pituophis cat- 

 enifer deserticola. The last four species make up the principal fauna 

 of the ridges, and Sceloporus graciosus may be present in small num- 

 bers where the soil is fine. 



