248 



University of California. 



[Vol. a. 



of a large tortoise were found by the writer in a stratum of fine 

 gravel about ten feet above the bedrock in an abandoned placer 

 mine near Cave City, Calaveras county. The gravels are inter- 

 rhyolitic like those at Balaklava Hill. These specimens could 

 not be preserved. In the Johnson mine near San Andreas, 

 the impression of a tortoise is said to have been found, some 

 years ago, in the leaf-bearing rhyolite tuffs. It is not known 

 what became of this specimen. In the University collection there 

 is a very fragmentary specimen labeled "from cement near Todd's 

 Valley." A single marginal plate of a second individual from 

 the rhyolitic gravels on Balaklava Hill was forwarded to the 

 University museum by Mr. Stephens. 



University of California, 

 May, 1903. 



