TtiE VICTORIAN NATURALIST. 25 



movement, and torsion. The prevailing strike of the plane of 

 foliation is from north-west to south-east, and is with that of the 

 Ordovician rocks. Close to the north-west end of the Serpentine 

 belt, at the head of Black Soil Gully, were found obscure 

 Graptolites, associated with small Brachiopods ; the latter were 

 kindly identified by Mr. F. Chapman, A. L.S., National Museum, 

 as Siplionotreta cf. discoidalis, Chap. A particularly interesting 

 conglomerate occurs in the Serpentine, but the discussion of its 

 peculiarities must be postponed for the present. 



At Monument Gap, at the head of Black Soil Gully, a magni- 

 ficent view was obtained. To the east lay Wellington, with its 

 precipitous sides of porphyry ; to the north Tamboritha, even 

 higher, but less rugged. The long, deep valley of the main 

 Wellington River wound down among the shadowy depths from 

 the north-east. Between this valley and Mount Wellington the 

 horizon was bounded by the edge of a great plateau over 5,000 

 feet in height. Long, steep parallel spurs, with dark valleys 

 intervening, led up to the top of the table-land. Reid pointed 

 out the spur by which Riggall's track climbs, from the junction of 

 Barrier Creek with the Wellington River to the top of the 

 mountain. In a distance of about eight miles an ascent of over 

 3,000 feet is made. Such a scene would rejoice the eye of an 

 artist as well as that of a student of pliysical geography. On the 

 Monument Gap several aboriginal tomahawks were found. These 

 had been made from waterworn stones, and were flaked only on 

 one side. 



Saturday, 7th January. — On Saturday morning a start was 

 made for the top of the mountain. After a short ride up the 

 valley of the Wellington, where some good sections of anticlinal 

 folds in the Ordovician rocks were observed, the junction of 

 Barrier Creek with the Wellington was reached. The main 

 stream, which turns to the north-east, was left, and a long, steep 

 spur was ascended to the east, with Barrier Creek on the right. 

 The climb was very arduous for the horses, and in places so steep 

 that it was often advisable to hang on to the horse's neck or 

 mane to avoid slipping off behind. About half-way up the spur 

 the first view of the lake was obtained by turning off from the 

 ridge of the spur thirty or forty yards to the right. 



The view was a charming one. Standing on the edge of a 

 precipitous face of the spur the little lake was seen in a deep 

 depression fully a thousand feet below. A lower transverse 

 wooded spur of loose rocks lay between us and the lake, and hid 

 from view the western and widest end of the lake. Part of this 

 spur forms the barrier which has formed the lake. On both sides 

 the mountain slopes rose steeply from the water's edge. On the 

 right, the north-western part of Wellington, 2,000 feet above the 

 lake, towered to the sky, with two imposing bluff's of jointed 

 porphyry. The timbered slope belov showed long scars where 



