372 



K 2 

 H 2 



S0 3 

 C0 2 



100-09 99-45 100-01 101-77 98'02 lOO'll 100-14 

 Sp.Gr. ... 2-71 2-66 2-79 2-68 



I. Quartz-keratophyre,* 1 * between Riibeland and Elbingero le (Hartz). JACOBS. 



II. Keratophyre (GUMBEL) from Rosenbiihl, near Hof (Fichtelgebirge). LOEETZ. 



III. Keratophyre from the Sumpfthal (Hartz). Granular Variety. BOTTCHEE. 



IV. Keratophyre from the Sumpfthal (Hartz). Fine-grained darker variety. GEEMSE. 

 V. Rhomben-porphyry ( 2 > from Vettakollen. KJEBULF. 



VI. Rhomben- porphyry from Riis. KJEBULF. 

 VII. Pantellarite. FOEESTNEE. Quoted from Roth's Beitrage, &c., 1884, p. 67. 



(1) The four analyses of keratophyre are quoted from LOSSEN'S paper, Jahr. d. preuss, 

 Geol. Landesanstalt fur 1884, p. 35. 



(2) The analyses of rhomben-porphyry are quoted from BEOGGEE. Die silurischen Etagen, 

 etc., p. 301. 



