84 ; E, 0. Tecfle: 



collected from various parts of this area, and numerous other col- 

 lections have been made by various members of the geological sur- 

 vey throughout Eastern Victoria. 



Of these occurrences, the best collections have cpme from (1) Mat- 

 lock, (2) the Thomson-Jordan Valley, (3) the Black River Belt, 

 and (4) the Wellington area. These four localities consist of paral- 

 lel strips of Upper Ordovician rock, separated by belts of Silurian 

 sandstone and shale. The fossils show that these outcrops, if not 

 identical in liorizon, are at any rate, very cloiSiely allied; and owe 

 their reappearance to successive intense folding along lines of 

 N.N.W. axes, resulting also in the folding of the overlying Silurian 

 rocks in a similar way. Subsequent denudation during the 

 present cycle of erosion has exposed some Ordovician as inliers. 

 They are generally narrow, elliptical belts, conforming to the 

 general strike, but disappearing along the strike under the Silurian, 

 often to reappear, however, at varying intervals along this line. 

 This is due mainly to a very general development of pitch, some- 

 times north and sometimes south. This structure, common through- 

 out the older rocks of Victoria, has been clearly brought out in the 

 Wood's Point and Walhalla district by the excellent field work of 

 Mr. 0. A. L. Whitelaw and Mr. W. Baragwanatli respectively. 



Up to the present no definite graptolite zones have been recog- 

 nised in the Upper Ordovician in Victoria. It is probable that the 

 vertical range in the Upper Ordovician is not so great, but it is 

 likely that systematc work would yield some definite results in 

 favourable areas. 



The following is the complete list of graptolites recorded from 

 the Wellington region : — 



Diplograptus foliaoeus, Murchison. 



Diplograptus thielei, T. S. Hall. 



Diplograpius (Orthograptus) quadrimucronatus, J. Hall, 



Diplograptus (Orthograptus) calcaratus, Lapworth. 



Leptograptus flaccidus, J. Hall. 



Climacog-raptus wellingtonensis, 1'. S. Hall. 



Climacograptus bicornis, J. Hall. 



Climacograptus bicornis, var. tridentatus, Lapworth. 



Climacograptus tubuliferus, Lapworth. 



Dicellograptus elegans, Carruthers. 



Dicellograptus morrisi, Hopkins. 



Dicellograptus gurleyi, Lapworth. 



Cryptograptus tricornis, Carruthers. 



