SOME CALCITE CRYSTALS WITH NEW FORMS 5 



agreeing fairly well with the average of the above given measure- 

 ments. The above detailed description is given in order to call atten- 

 tion to these trigonal calcites in the hope that some one would find 

 a similar group having this new form which would admit of accurate 

 measurement and thereby definitely determining the symbol of this 

 form. 



Fig. 2 



Fig. 3 



A single minute face of C- {0.13.13.1 1 was noted and this was 

 poorly developed, giving a poor reflection. Sansoni^ gives this form 



' Zeit. Kryst. Min., x, 564. 

 »Min. Pet. Mitth. xii, 487, 1891. 



(Ref. Z. Kryst., xxiv, 431.) 



