382 W. M. Devis—Beerafts Mountain. 
2a. Tentaculite limestone, probably including the Ribbon 
limestone and possibly some equivalent of the Water-lime; 
ne, blue, even, thin beds, weathering light-colored and smooth. 
A few imperfect Leperditie were found init. Thickness, twenty 
to thirty feet. No representative of the Coralline limestone was 
noticed at the base of this subdivision. 
2b. Lower Pentamerus limestone; heavy, knotted, grayish- 
blue beds, with irregular nodules of chert. Fossils were not 
common, but Pentamerus galeatus and Atrypa reticularis were 
fer macropleura, Hemipronites radiata and Strophomena rugosa 
being most characteristic among many others. Thickness, fifty 
2d. Upper Pentamerus limestone, probably with representa- 
tives of the Encrinal or Scutella limestone; a hard, gray, erys- 
forty to fifty feet. 
8. Cauda-galli shales; barren, gray, monotonous shales, sel- 
dom showing any trace of bedding, but breaking on an irregular, 
nearly vertical cleavage. No fossils. Thickness, one hundred 
and fifty to two hundred feet. This formation has not been 
previously mentioned as occurring here. : 
4. Corniferous limestone; a hard, cherty limestone lying on 
the Canda-galli shales over a small surface, and doubtfully 
referred to this formation. No fossils. Thickness, ten to 
fifteen feet. 
