EARTHS. AGGREGATE. 6i. Porphyrius. 191 



basalticus. Confiding of bafalt, and fclpfpar, with fometimes a few 

 particles of quartz and mica interfperfed. 

 FreberBr.auf WelJchL l6. />. 27^. 



Found , and is Ibmetimes found among the ancient monu- 

 ments of Rome, 



PeMculariu Confifting of bafalt, and cryftals of granatine fhorl. 



Freber Br auj. Welj' hL 16 p. 272. 274. 



Found here and there among the ancient monuments of Rome y 

 wirh frequently a fmall mixture of hornblend or Ihorl : the 

 cryftals of Jiorl are fomr-timt- fo fmall as hardly to exceed in 

 magnitude tiie point ot a needle. 



fuUensis, Confiding of bafalt, and garnets. 



Found in the m.0MXii2i\'[^ Pferdekopf in the bifhopric oi FuUa, 



iliijinus. Confiding of bafalt, and olivine. 

 Giceni litolog, Vefwv ■ f* 90, 

 Found round Vej'unjim^ and fometimes contains a few garnets. 



G. With the bafe of lava, 



njulcankut* Compofed of lava, and hornblend. 

 Freber Br, a. Weljchl. 11, />. 178. 

 Found in moft volcanic mountains. 



ocellatus, Compofed of lava, and crydals of granatine (horl. 

 Gioeni litolog, Vefwv. p. 97--IOO. 102, 103. 109. 123. 

 Freber Br. a. Welfch. 1 1. ^. 176, 178, 179. 

 Found round Veju^vius^ black, grey, or red : fometimes con- 

 taining genuine fhorl, or mica, rarely feldfpar or garnets. 



iaciUaris, Compofed of lava, and 6-fided prifms of genuine fhorl. 



Gioeni litolog , Vefuv . p gZ'-ioo. 



Freber Br, a. Wel/chl. \\, p. 167, 177—179. 



Found near Vefwvius and in the Marchefas iflands; black, grey, 

 or red : the cryftals of (horl are fometimes very obtufe-angled, 

 thinner or thicker, black, white, blue or green of various 

 fhades, fometimes mixed with cryftals of aftinote, garnet, or 

 granatine fhorl. 



nitidulus, Compofed of lava, and mica. 



Gioeni litolog. Vefwv, p. 89. 102. 1 18. 



Found in volcanic mountains, and frequently containing cryflals 

 of granatine or genuine fhorl, or garnets, or both. 



decipiens. Compofed of lava, and feldfpar. 

 Gioeni litolog, Vefwv. /. 123. 

 I)olo7Kieu mem*et catal. /». 8. 



Found in Sicily and round Vefimjius, generally including forae 

 hornblend, rarely mica or fiiorl. 



