538 PROCEEDINGS OF THE GEOLOGICAL SOCIETY. [Mar 10, 



Locality. Genera, &c. 



f Calymene, Belerephon, Psammo- 



Simmonds Bridge, Upper Yarra, J bia,Othoceras,Nucula,Leptaena, 



40 miles east of Melbourne ... | Atrypa, Strophomena, Pentame- 



l rus, Cycloceras, Conularia. 



Anderson's Creek, 25 miles east |" Stenopora, Palaeopora, Favosites, 

 of Melbourne. Impure lime < Petraia, Orthis, Spirifer, Crinoid 

 stone I stems. 



nv n, i ,,, -,., f Stenopora, Calymene, Pentamerus, 



Deep Creek, ditto, ditto < Atrypa 



Watson's Creek Unner Yarra 15 f Atrypa, Strophomena, Pentamerus, 

 Watson s creek. Upper Yarra, id I Qrthis, Avicula, Actinocrinus, 

 miles east of Melbourne | Stenopora, Cyathocrinus. 



/ Pleurodictyum (2 sp. new), Beyri- 

 chia, Petraia, Pleurotomaria, 

 Portlockia, Orthoceras, Favo- 

 sites, Atrypa, Bellerophon, San- 



Woori Yalloch Creek junction 

 with Yarra, 45 miles east of < 

 Melbourne 



guinolites, Cheirurus, Pentame- 

 rus, Conularia, Orthis, Cucul- 

 lella, Lichas, Loxonema, Steno- 

 pora, Palaeopora, Actinocrinus, 

 I Sphaerexochus. 



treta. 



Holden, 18 miles N. by W. from f Diplograpsusrectangularis D pris- 

 Melbourne ] ?'. Dld y m °g ra P sus > Siphono- 



Keilor, 10 miles N. W. from Mel 

 bourne 



Thence 75 miles N.W., Graptolites in great variety, and Lingulae. No other 

 in the beds to the N.W. 



> Graptolites, Cheirurus. 



Thus we have about 60 genera of Silurian fossils, including many 

 new species. 



2. On the Gold-field of Ballaarat, Victoria. By Mr. John 

 Phillips, C.E., Surveyor in the Government-Service of Victoria. 

 (Communicated by Sir R. I. Murchison, V.P.G.S.) 



[Abstract.] 



All the Victorian gold-fields are near granite, and some are on it. 

 The granite at Ballaarat is fine and even-grained ; and the schists 

 lie against it. Between these rocks the junction is abrupt ; there 

 is little or no gneiss, and no porphyritic or other veins were ob- 

 served. The schists are greenish, and are occasionally chloritic, 

 micaceous, aluminous, and siliceous, and are traversed by quartz- 

 veins, from less than an inch to one foot in thickness. The schists 

 in the upper portion are more quartzose, and contain oxides of iron ; 

 lower down they are more aluminous and contain pyrites. Their 

 strike is rather uniform, nearly coinciding with the true meridian, 

 while the cleavage and quartz-veins are not regular in strike. 



The workings at Ballaarat have exhibited a section of 300 feet in 

 thickness, consisting of gravels, sands, clays, and trap-rocks. The 

 oldest drift or gravel (a beach-like conglomerate) is found not in the 



