CATALOGUE OF PHILOSOPHICAL APPARATUS, &c. 31 



HEBRIDES. 

 Drawer 29. Basalt, Pitchstone, &c. Mull, Staffa, Rum. 



Drawers 30 and 3 1 . Pitchstone and other Trap rocks. Isle of Egg. 



Drawers 32, 33, 34. Hypersthene rock, and other varieties of Trap, containing 

 Zeolites, from the island of Skye. 



Together with a geological map of the island. 



See Macculloch, Geological Transactions, vol. III. For the Geology of the Hebrides gene- 

 rally, Macculloch's Western Islands is the best authority. 



Drawer 35. Trap rocks from the Faroe Islands. 



Presented by sir W. Trevelyan. 

 Garnets and Analcime, Anglesea, &c., from professor Henslow. 



See Henslow's paper in Transactions of the Cambridge Philosophical Society. 



Drawer 36. Syenitic rocks, Malvern, Herefordshire ; Mount Sorrel, North- 

 amptonshire. 



See Phillips in the Memoirs of the Geological Survey of Great Btitain. 

 Drawers 37, 38. Porphyry associated with sandstone. Chemnitz, Saxony. 

 Drawer 39. 



Drawer 40. 



II. PRODUCTS OF SUB-AEREAL VOLCANOS. 



Generally more or less cellular, although distinguishable into stony 

 and vitreous, according either to the greater or less slowness with 

 which they cooled, or to the chemical composition of the material 

 itself. When cellular, crystalline matter rarely fills up its cavities, 

 as in submarine volcanic rocks. 



AUVEEGNB. 



Drawer 41. Lavas of Volvic, Graveneire, Puy de laVache, and Puy Pariou. 

 Also basalt of Gergovia, near Clermont, Auvergne. 



