3i<3 



3. Another calcareous rock, of a compact close grain, and yellowish 

 smoky colour. It is found near Soudak. . 



4. The jura or oolitic formation, which the author considers to 

 rest on hard, cellular, magnesian limestone (rauhwacke) and on moun- 

 tain limestone. 



5. Rauhwacke, porous, globular,and of a yellow colour, occurring in 

 perfectly horizontal strata on the road from the German colony of 

 Rosenthal to Koutschouk-Kousin. 



6. Cavernous limestone, which, as well as the rauhwacke, is 

 found in parallel strata of very great extent, and forms chains of hills, 

 which are less elevated than those of the magnesian limestone. 



7. Variegated sandstone in alternate thin strata of a green, brown, 

 red, and yellow colour : it is well developed at Sably and Alma. 



8. Conglomerate limestone, which forms the greater part of the 

 environs of Theodosia. 



9. Magnesian limestone, constituting the highest mountains of the 

 Crimea. Near Koutlak it rises above all the other formations, having 

 very elevated and isolated cupolas and rounded summits. The flanks 

 of the mountains are generally steep, and often perpendicular, as is 

 well seen at the Falkenberg near Soudagh, and in the mountain chain 

 of Yaila. 



10. Red sandstone conglomerate, the component parts of which vary 

 from very small grains to blocks of six feet in diameter. It lies under 

 the magnesian limestone, and is found in very large masses at Koos. 

 Fragments of quartz, flinty slate, limestone, slate-clay, greenstone, 

 and sandstone are contained in it. 



11. Quartzy sandstone found at Nikita. The author suspects 

 that this rock was mistaken by Pallas for the old red sandstone. It 

 is always more or less interstratified with wood-coal. 



12. Slate-clay, which begins behind Koutlak, on the road from 

 Kapsiter, and ranges towards Gouak, Koutschouk-Kousin, and Kou- 

 rousin on the road from Alouschta. Throughout its whole extent, 

 the author found it to contain alum, derived from decomposing pyrites* 

 This slate-clay also contains a considerable bed of wood-coal, and 

 masses of clay-ironstone. 



13. Basalt, occurring only in beds of inconsiderable thickness 

 and small extent, as at Sably and Kikineisj also near Kozloff, Se- 

 bastopol and Theodosia. 



14. Greenstone, which occurs on Mount Aioudagh nearKoutschouk- 

 Larnbat. The serpentine described by Pallas was merely decomposed 

 greenstone. 



15. Wacke, accompanied with basaltic hornblende and crystals of 

 black mica, occurs in the greenstone just mentioned. 



16. Amygdaloidal basalt, greenstone, and wacke. These rocks 

 are met with near the convent of St. George, on the sea-shore. 



1 7. Argillaceous or clay-stone porphyry, remarkable for its columnar 

 appearance, occurs above Alma, three wersts above Sably. 



Feb. I. — A paper was read " On the deposits overlying the car- 

 boniferous series in the valley of the Eden, and on the north-western 



