94 



University of California Publications. 



[Geology 



always as dull faces, so that good readings could not be obtained. 



The new form 3Er% seems to be present on all of the crys- 

 tals, but it is often rounded slightly, so that good measurements 

 could not always be obtained. The average angles are close to 

 the best measurements and the form is well established. 



Miner alogical Laboratory, University of California, 

 January, 1906. 



