172 Proceedings of the Royal Society of Victoria. 



Reefton, MacMahon's Creek, Macclesfield, Alexandra, and 

 Matlock also seem to belong to the Melbournian horizon. 



The second series we may call the Yeringian, after Yering 

 north of Lillydale, where the beds have yielded a small brachio- 

 pod fauna. These beds are best shown at Lillydale, but the name 

 Yeringian is preferable, as based on a native Australian place 

 name. This Yeringian series includes the most important silurian 

 limestones, including those of Lillydale, Loyola, the Thomson 

 River, Cape Liptrap, and also the beds of Seville and various 

 localities in the basin of the Woori Yallock. We should expect 

 this horizon also to appear in the synclinal to the west of the 

 Warrandyte anticlinal ; but so far I know no definite palaeonto- 

 logical evidence of its occurrence here. 



No satisfactory list of the distinctive fossils of these two 

 horizons can yet be drawn up ; but I may quote the following 

 species, using the names generally known in Victoria, without 

 any attempt to revise the nomenclature. 

 Melbournian — 



Phacops (Odontochile) caudatus, Brgn. 



Forbesia euryceps, McCoy. 



Homolonotus harrisoni, McCoy. 



Cyphaspis spryi, Greg. 



Hapalocrinus victoriae, Bath. 



Retiolites australis, McCoy. 



Spirifera plicatella (L.), var. macropleura (Cunr. ). 



Cardium gippslandicum, McCoy. 



Orthoceras (Cycloc.) ibex. Sow. 



Orthoceras buUatum, Sow. 

 Yeringian — 



Phacops (Portlockia) fecundus, Barr. 



Lichas australis, McCoy. 



Homolonotus sp. n. 



Leptaena (Leptagonia) rhomboidalls (Wilck). ?■ 



Spirifera sulcata. His. 



Spirifera reticularis, L. 



Pentanierus australis, McCoy. 



Orthoceras lineare, Mst. 



Trochus (Scalaetrochus) lindstromi, Eth. 



Pleurotomaria (Phanerotrema) australis, Eth. 



