Geology of tlie. Loiver Yarra. 249 



according to Mr. Catani, Engineer for Roads and Bridges in the 

 Department of Public Works, basalt "boulders" were found in 

 the cutting on the east side of Anderson Street. 



In the western portion (Section C), the deposits were alluvium 

 for varying thicknesses up to 7 feet; bluish-yellow and dark 

 grey sandy clays and fine sand, 4ft. Gin. to 5ft.; dark bluish-grey 

 clay with roots, 4 feet to 6ft. 6in.; bluish-grey marl with thin 

 sandy layers and containing shells, 4 feet and upwards. The 

 shells in this south cutting are not in such quantity, though in 

 greater number of species than in the north cutting. 



It may be mentioned, however, that a larger collection of 

 shells was made in this cutting than in the other, which probably 

 accounts for the fewer species recorded from the latter. 



The following is the list of shells obtained, and I am indebted 

 to Mr. J. H. Gatliff for kindly naming them : 



Lamellibranchiata. Gastropoda. 



Chione sp. Nassa pauperata (Lamarck). 



Mytilus sp. ^N. labecula (A. Adams). 



*Mactra sp. *Cyclostrema micans (A. Adams). 



Ostrea? juv. =Liotia angasi (Crosse). 



*Tellina deltoidalis (Lamarck). *Natica plumbea (Lamarck). 



Cardium tenuicostatum (Lamai-ck). 



Barnea australasiae (Gray). Crustacea. 



Venus laevigata (Sowerby). 



*Arca trapezia (Deshayes). *Balanus (?) sp. 



Note. — Those marked with an asterisk are from the north 

 cutting only, the whole of them being found in the south cutting. 



The shells occurring in profusion in the Botanical Gardens 

 were Nassa, both species, and Tellina deltoidalis. Area trapezia 

 was scarce, while in the north cutting it was fairly plentiful. 

 Natica plumbea was in fair number in both. 



The eastern end of the cutting passed through the point of 

 Silurian which had diverted the river a little to the N.W., and 

 exposed an interesting section on the north side of the cutting. 

 Here, at normal water level, may be seen the remnant of a 

 5 inch layer of brecciated conglomerate resting on the Silurian. 



