June, 1907.] THE VICTORIAN NATURALIST. 25 



portunity for examining fresh country. Tiie Tamboritha mining 

 track was therefore followed from where it ascends from the 

 Moroka to the west. This gave an easy ascent to the divide, 

 4,800 to 5,000 ft. in height. The track had now to be left to 

 trace the watershed southwards to reach the Wellington camp. 

 No track could be found here for the first part of the distance, 

 and the Snow Gum forest formed some hindrance to travelling. 



On returning to Wellington a short stay was made to further 

 examine its table-land and study its rocks. 



Descending again to the Wellington River, some time was 

 then available to again visit the lake and examine the Ordovician 

 and serpentine area. By the end of this time both shoe-leather 

 and provisions began to cause some anxiety, but by careful 

 arrangements both were made to hold out fairly well. The 

 necessity of light loads in such country requires often that some 

 risk must be taken by omitting from the outfit some articles of 

 both clothing and food which most bushmen would willingly 

 have if possible. 



A brief review of some of the questions raised in the intro- 

 duction can now be undertaken as a result of additional 

 observations collected during the trip. 



Lower Palcnozoic Area. — The position of the area has been 

 previously referred to (8, 9), and good sections can be noted 

 along the Dolodrook River, Upper Wellington and Barrier 

 Creeks. The boundaries and exact area of this occurrence have 

 not yet been definitely determined. The western contact with 

 the Upper Palaeozoic bed is visible on both sides of the 

 Wellington, about a mile below the Dolodrook junction. A 

 distinct unconformity is here to be noted, and evidence of 

 faulting at probably distinct periods appears to be shown. These 

 Lower Palaeozoic beds can be traced continuously eastwards along 

 the valleys up to the base of Mt. Wellington, a distance of nearly 

 eight miles in a straight line. Northwards along the main 

 Wellington branch the extreme extension has not been traced, 

 but the rocks of this series were noted for at least four miles 

 above the Barrier Creek junction. To the south they were 

 traced at least three miles in a direct line from the above-named 

 junction, and, from evidence of the stream boulders they must 

 extend much further in this direction. From very rough calcu- 

 lation there must be at least between 30 and 40 square miles of 

 these rocks exposed. They can be traced up the sides of the 

 valleys for a considerable height. On the Wellington spur 

 leading up to the mountain they were noted up to an elevation of 

 about 3,500 feet above sea level, or 1,74c feet above the bed of 

 the Wellington. No fossils were obtained on this spur, but the 

 characteristic graptolites of the area were obtained at an 

 elevation of 1,150 feet above the river bed, several miles to the 



