496 University Geological Survey of Kansas. 
Figure 74 represents crystal 4. 
No good measurements could be made on account of the 
poor reflections, due to striated and imperfect faces, but they 
were sufficient to identify the forms as given above. ‘The 
crystals resemble some from Altenbey, described by G. Selig- 
mann. They differ from most doubly terminated calamine 
crystals in having the analogous ends more acute than the 
antilogous ones. 
The crystals are usually arranged in radiating groups, 
their antilogous poles being in contact. 
Well-defined crystals of calamine are rare, it being more 
often found as the coxcomb variety, consisting of crystals in 
parallel or approximately parallel position, but with only a 
small portion of the individual crystals showing. 
Calamine very commonly occurs in globular, mammillary, 
botryoidal or stalactitic forms. 
Pseudomorphs of calamine after calcite and dolomite are 
of frequent occurrence, especially at Granby. 
From a study of the minerals of the district, W. H. Sea- 
mon! comes to the conclusion that ‘‘all the massive calamines — 
once existed in southwest Missouri as ‘tallow-clay’ precipi- 
tated from solutions.’’ While this is certainly true in many 
and in perhaps the majority of cases (as the so-called calamine 
pseudomorphs after ‘‘tallow-clay’’ indicate), yet, in many 
cases, calamine has been formed directly from sphalerite. 
Many specimens from Granby show that conclusively, and 
even distinct pseudomorphs of calamine after sphalerite have 
been found by the writer. 
The principal localities for calamine are Granby, Aurora, 
and Lone Elm, near Joplin. ‘The mineral is widely distribu- 
ted throughout the district, but is not as common as it was 
formerly, being essentially a surface deposit. 
Muscovite. 
Muscovite occurs as small, transparent scales in shale at 
Cave Springs. It is perhaps of secondary origin. 
18. Zeit. f. Kryst. u. Min., vol. 1, pp. 342, 348, pl. XVI, f. 5. 
19. Seamon: Amer. Jour. Sci., vol. 39 (8), pp. 38-42, 1890. 
