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University of California . 



[Vol. 3. 



mine. When received at the museum of the University of Cali- 

 fornia, the specimen was imbedded in a coherent mass of tuff and 

 gravel particles. This investing matrix has since been removed, 

 exposing the greater part of the carapace and plastron. 



The preservation of the specimen is largely due to the interest 

 of Mr. Jenkins and Mr. J. M. Stephens, of Murphys, by whom 

 it was forwarded to Berkeley. The writer is indebted to Dr. 

 O. P. Hay for suggestions regarding the systematic position and 

 relationships of the species. 



Fig. 1. Stylemys calaverensis n.sp. Carapace, dorsal view. X i. 



The carapace (Fig. 1) has been considerably crushed, and 

 the relations of the various elements obscured by the slipping of 

 one part over the other. The first costal on the left side over- 

 laps the first neural. The second and third costals on the right 

 side are in their natural position with reference to the neurals, 

 while those on the left side are overlapped by the neurals, as is 

 shown by the displacement of the trace of the dorsal scutum on 

 the third neural and fourth left costal. The sixth left costal has 



