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OF THE PAPAL STATES. 



261 



52. — Semi-vitrified scoriaceous lava. — From the most 

 ancient summit of Monte Artemisio, near Velletri. 



63. — Brown vesicular scoriaceous lava. — Monte Porfio 

 and the Tusculan hills above Frascati. 



54. — Scoriaceous lava, finely vesicular in the interior, 

 and with some of the cavities filled with leucite. — Monte 

 Cappuccini. 



55. — Scoriaceous lava, with a costal of augite. — From 

 the lower portion of the basaltic lava stream of Capo di 

 Bove. 



56. — Lava, with very minute cubical crystals of hyacinth 

 (zircon). — From the summit of Tusculum, above Fras- 

 cati. 



57. — Traciiytic lava, with glassy felspar \ angular frag- 



ments 



of black and grey vesicular scoriaceous lava and 



decomposed crystals of felspar in a felspathic base. — East 

 south-east of Viterbo. 



58. — Traciiytic lava, with crystals of glassy felspar. 



Mansiana, near Bracciano. 



59. — Traciiytic lava, with glassy felspar, oxide of iron, 



&c. — Near Bracciano. 

 60. — Earthy traciiytic lava, with crystals of mica and 



bar. — From volcanic conglomerate, on the ascent 



glassy felspar. — 



to Cignanello, east of Monte Cimino. 



61. — Traciiytic lava, crystals of glassy j el lsp 

 in a felspathic base. — North of Monte Cimino. 



felspa 



62. — Trachytic lava, with crystals of glassy 

 Hack mica, &c. — Bagnaja, near Viterbo. 



63. — Traciiytic lava, with crystals of glassy felspar (c 

 of large size), and mica, in a decomposing felspathic base. 

 Monte Soriano and Monte Cimino. 



lassy felsp 



Madonna i 



64. — Traciiytic lava, w r ith 

 mica, and small fragments of augite. 

 Poggio, between Bassano and Bomasto. 



65. — Trachytic lava, with crystals of augite and glassy 



felspai 

 Monte 



From the hills near Vignanello, south-east of 



Upper 



Gallery. 



Table-case 

 in Recess 6. 



