Intelligence and Miscellaneous Articles. 553 



of St. Monance, and rise again to the east. Between Elie and St. 

 Monance the strata are singularly contorted ; and an important 

 fault runs nearly parallel with the coast, causing much confusion. 

 Beyond St. Monance the section becomes clear, and, passing through 

 the Mountain-hmestone down to the level of the Burdiehouse beds, 

 as at Burntisland, exhibits a magnificent series of the Lower Car- 

 boniferous rocks, consisting of freshwater or estuarine shales and 

 sandstones, with a few bands of limestone, one of which latter is of 

 marine origin. Sphenopteris affinis characterizes the upper portion 

 of this inferior group ; and Cyclopteris, its lower portion. The Bur- 

 diehouse limestone belongs to the upper portion ; and, like the other 

 calcareous bands, thins out eastwardly. The Grantham beds, on the 

 contrary, appear to belong to the lower portion. 



The fossils of the four limestone-bands in the upper part of the 

 Mountain-limestone are Zaphrentis, Orthis filaria, Productus punc- 

 tatus, P. semireticulatus, Aviculopecten, Modiola, Loxoneina mgifera, 

 Orthoceras, Nautilus subsulcatus. The fifth band and its accom- 

 panying bone-bed contains Productus semireticulatus, Aviculopecten, 

 Spiri/er duplicostatus, Cochliodus, and Ctenacanthus. The lowest 

 band (at Ardross) has Nucula tumida, N. attenuata, Schizodus sulca- 

 tus, Goniatites, Natica, Serpulites, Holoptychius Hibberti, Eurypterus} , 

 Gampsonyx, Dithyrocaris. The upper half of the Lower Carboni- 

 ferous series contains Sphenopteris affinis, Cypris ?, and Palceoniscus. 

 The marine band, in the middle of the series, has Encrinites, Fene- 

 stella, Nucula tumida, N. attenuata, and Productus semireticulatus. 

 The lower half of the series has Cyclopteris, Stigmaria, Carjioliihes, 

 Cypris }, Pterichthys ?, and Eurypterus. 



LXVIII. Intelligence and Miscellaneous Articles. 



ON EUPHOTIDE AND SAUSSURITE. BY T. STERKY HUNT, OF THE 

 GEOLOGICAL COMMISSION OF CANADA. 



THROUGH the kindness of Prof. Arnold Guyot I have had an 

 opportunity of examining a collection of tlie euphotides of Mt. 

 Hose, and of satisfying myself as to the nature of the true Saussurite 

 (the jade of De Saussure), which is a white mineral forming with 

 grass-green smaragdite, the Euphotide jadien of Brongniart. It 

 appears to be a compact epidote or zoisite, having, as De Saussure 

 long since determined, the hardness of quartz, and a density of 3*3 

 — 3-4. My own analysis of a fragment from Mt. Rose, with a 

 density of 3'36, gives the composition of a lime-alumina epidote, 

 with a little soda. The analyses of Boulanger of the Saussurites of 

 Mt. Gen^vre and Orezza, lead to the same conclusion. 



Saussurite is then nearly related to the massive white garnet from 

 the Green Mountains in Canada, which, mixed with serpentine and 

 with amphibole, gives rise to varieties of rocks which I have described, 

 in my report of the Geological Survey of Canada for 1856, as 

 resembling certain euphotides. The smaragdite of Mt. Rose is a 

 vanadiferous diallage, approaching in composition the variety from 



Phil. Mag. S. 4. No. 103. Siippl. Vol. 15. 2 



