70 Proceedings of the Royal Society of Victoria. 



rarely in the zone below, and I have specimens from Bencligo 

 and Tarilta on the same slab as T. fndicosits. I have found five 

 outcrops of this, the Wattle Gully zone, namely, two previously 

 mentioned near the Elphinstone tunnel, one to the south of the 

 head of Poverty Gully, one near the head of Kampf's Gully, and 

 this one in Wattle Gully. The Kampf's Gully outcrop is near a 

 syncline which was traced south to near the Eureka reef, when 

 the same relation to the T. fruticosus zone was again observed. 

 A specimen of Dichograptus octobrachiains, with a central disc, 

 was secured from the lower zone at this locality. The only other 

 specimen of this variety I found at Burns' Reef in a higher zone, 

 and it has not hitherto been recorded for Victoria. 



I have not been able to accurately trace the relationship of the 

 Wattle Gully zone, to the next above, as a considerable thickness 

 of sandstone intervenes, and is exposed both to the east and the 

 west of the Chewton anticline. To the east of the head of 

 Victoria Gully, at Mcholson's Reef, in Dogleg Gully, and at 

 Burns' Reef fossils occur, which I believe belong to the same 

 horizon. There are no well-marked forms especially abundant, 

 but the beds may be distinguished from those below by the 

 absence of D. bifdus, and from the zone above by the still com- 

 parative rarity of Tetragraptiis cadiiceus In default of a distin- 

 guishing species, I have called this the Burns' Reef zone, from 

 the locality where I found the best exposui'es. At this place a 

 thickness of three hundred feet of unfossiliferous concretionary- 

 banded sandstone, and slate, sepai'ates it from the zone above. 



This upper zone is characterised by the relative abundance of 

 Ph\lloi:^rapti(S associated with Tetragraptus cadiiceus (Salter). The 

 former genus is abundant throughout all the beds, from this 

 hoi'izon downwards, but though plentiful in this zone is not 

 found above it. T. caducens ranges throughout all the Castle- 

 maiue rocks, being rare in the lowest beds, but gradually 

 increasing in numbers and in size at the same time, as we go 

 upwards. In the T. fruticosus zone it is rare and small. It is 

 but slightly more abundant in the Wattle Gully beds, and it is not 

 till the present horizon is reached that it becomes a dominant 

 form. I have called this the Phyllograpto-caduceus zone, a useful 

 though perhiips awkward term. 



