474 University Geological Survey of Kansas. 
t:, +iR*®. Though only in a few cases dominant (type 18, 
Granby), this form is prominent on crystals of types 1 and 
12 and occurs as a subordinate form on types 2 and 9. 
w:,+2R? is the dominant form on type 6 from the Nickel 
Plate mine, Aurora, and on type 15 from the Elizabeth mine, 
Joplin. Itis also prominent on type 3 from the Pelican mine, 
Joplin. Striations parallel to its acute or shorter polar edges 
are common. 
e:,+3R8 is prominent on type 7, Elizabeth mine, and type 
20, Gracie Clark mines. Its faces are striated parallel to its 
acute polar edges. Often it is in oscillatory combination 
with pe. 
Nos. 25 to 27.—Scalenohedrons of thezonep-a. F:,+5 occurs 
as a subordinate form on crystals of type 7 from the Eliza- 
beth mine. Itsfacesareveryrough. Farrington mentions its 
occasional occurrence on crystals of type 2. 
K :+R* is, perhaps, of all the forms observed, the most 
common. The greater number of the crystals of the district 
have their habit determined by this form. KHtch-pits, or 
srowth figures of the form in figure 33, are sometimes noticed 
on the surfaces of crystals of type 22 from the Gracie Clark 
mines. Peculiar markings occur on its faces at the Blaikie 
No. 2 mine, as figure 54 shows. 
Other scalenohedrons. A few other scalenohedrons occur. 
On account of their small size, or the character of their faces, 
they cannot be satisfactorily determined. 
CoMBINATIONS.—On the following page is given table II, 
showing the combinations observed on the calcite crystals of 
the district. In the vertical column on the left is the number 
of the type; in the horizontal column at the top are the dif- 
ferent forms arranged as they are in table I, and description 
of forms. The table at once shows the forms in a given type 
and on what types a given form is present. A parenthesis 
around a form indicates that it is not a characteristic form 
for the type, but is only occasionally present. This samo dis- 
tinction is also used in the description of the type» 
