104 Proceedings of the Royal Society of Victoria. 



with olivine and hornblende (N.M.). For analysis see 

 N.M. Garden Gully Reef, Bendigo, in a basalt dyke 

 (P. 1876). Phillip Island, in older basalt (P. 1877-8). 

 Tangil (P. 1-881). Mount Elephant; Mount Shadwell; 

 Learmonth ; etc. (T.M. Catalogue, 1894). Mount Look- 

 out, Gippsland (T.M.). Dargo, in aplite (H. in Trs. R. 

 S. Vic, 1887, p. 137). 



Olivine. — Common in the newer basalts, except where they occur 

 as true dolerite; irregular shaped masses near craters 

 and points of eruption, as at Mount Franklin; Anakies; 

 Gisborne Hill; Warrion Hills; etc. (M. 1866). Garden 

 Gully Eeef, Bendigo, in a dyke (P. 1876). Basin Bank 

 Lakes, massive (P. 1875-6). Camperdown, bombs (P. 

 1877-8). Mount Gambier ; Mount Leu ra ; Learmonth 

 (P. 1878). Tangil (P. 1881). Sunbury (P. 1885). 

 Daylesford (P. 1887). Mount Shadwell (P. 1884). 

 Mitchell River (CI.) Snowy Bluff (H. teste CI.). 

 Western Port, in older basalt ; Mount Lookout, Gipps- 

 land (T.M.). Cape Schanck ; Coal Creek ; Coimadai 

 Creek; Dargo High Plain ; Kilmore; Melton; Water- 

 house Island, in Bass Strait (P.R. Vol. 3). Dargo, in 

 igneous dyke (H. in Trs. R.S. Vict., 1877). 



Olivenite. — Wilson's Reef, St. Arnaud, reniform coatings in 

 hollows (M. 1866). 



Onyx. — Reported from Beechworth and Yarra basin, very scarce 

 (M. 1S66). 



Opal. — Common opal. Sunbury, in basalt; Gelantipy, large 

 deposit, mostly yellowish or dark brown (CI.). Phillip 

 Island ; Moe (P. 1880). Near Morwell (P. 1882-3). 

 Woodend (M.S. 1886). Buchan (P. 1888). King 

 River, with chalcedony ; Moolort: Gisborne; Kyneton; 

 Talbot ; Blackwood ; near Bairnsdale ; Joyce's Creek 

 (T.M.). Precious opal. Beechworth, rare (M. 1866). 

 Gelantipy ; Sassafras Creek ; Woori Yaloak (P.R. Vol. 

 3). Fire. opal. Ovens (Bl. in Trs. R.S. Vic, 1866). 

 Beechworth (Bl. 1866). Head of Woori Yaloak River 

 (B.S. 1872). Pitch opal. Gippsland (T.M.). Semi-opal. 

 Maldon (T.M.). Near Melbourne, in basalt; Gisborne; 

 Bacchus Marsh ; Riddell's Creek (M. 1866). Opaline 



