THE VICTORIAN NATURALIST. 17 



mud. Crystals of Carbonate of Lime, Quartz, and Olivine in 

 cavities, and a soft, white Steatitic mineral in the earthy beds 

 giving the rock a marbled and porphyritic appearance." 



In the edition published in 1856 this note is omitted, and 

 there is a slight alteration in the colouring. The whole area is 

 referred to " Basalt Amygdaloid and Old Igneous Rocks." With 

 regard to the minerals Selwyn records I leave Mr. Pritchard to 

 speak, only remarking that we found no included quartz. About 

 a mile west of West Head an outlier of polyzoal limestone occurs, 

 probably of Jan Jucian age. This is a well-known locality for 

 fossil sponges, which occur in profusion. The limestone lies in a 

 depression in the volcanic rock. Travelling down from Bittern 

 we were for a long time on sands and clays, which are probably 

 in part of Balcombian age, but may be younger, and in many 

 places undoubtedly are redistributed. At Sandy Point, Mr. 

 Grant tells me, Silurian crops out on the beach pretty extensively. 

 Selwyn maps the country there as volcanic. 



On the hills we saw red sandstones and clays forming some 

 part of the older Tertiary series, and not till we crossed East 

 Creek and began to ascend the hill did the road show any 

 evidence of basaltic rock, and even then there were occasional 

 patches of Tertiary sands overlying. 



Along the sea cliffs we saw several examples of volcanic breccia 

 as recorded by Selwyn, and also beds of reddish clay, which may 

 represent decomposed tuffs, but without closer examination it is 

 not possible to say whether they are so or merely decomposed 

 solid rock. Judging by the breccia there should be an old vent 

 at no great distance comparable to those near Clifton Springs and 

 Airey's Inlet. 



In several places along the coast the old line of cliffs is 

 separated from the shore platform by a grass and tree covered 

 belt which points to a recent elevation of at least 5 feet. 



All the members of the party are not agreed as to this inter- 

 pretation, but I see no other possible one — the storm-beach 

 theory not, to my mind, being adequate. — T. S. Hall. 



Mineralogy. — The neighbourhood of Flinders, though of 

 special interest to the biologist, does not fall far behind from 

 the point of view of the geologist or mineralogist. From the 

 latter standpoint the recent Easter camp-out of this Club at 

 Shoreham may be said to have been highly successful, all the 

 members so interested coming home with well-filled — and I 

 might say, from personal experience, very heavy — bags of very 

 beautiful zeolitic and other minerals. 



One of the first localities to engage our attention was on the 

 ocean beach just below Flinders, where some fine dykes through 

 the basaltic and volcanic ash layers are to be seen at low tide. 

 Near the shore end one of these dykes stands up slightly, a foot 

 or two above the general floor level, but out towards low tide 



