54 THE VICTORIAN NATURALIST. 



named in the Quekett Club Journal, January, 1891. Mr. Western 

 has seen mounted specimens and drawings of the Australian form, 

 and states his belief that it is identical with the English one. 

 Lacinularia socialis was also found, and enabled a comparison 

 being made between the fixed and free-swimming species of the 

 genus. — J. Shephard. 



EXCURSION TO BACCHUS MARSH. 

 This excursion, though called Bacchus Marsh, was really arranged 

 for the purpose of visiting the well-known Werribee Gorge — a locality 

 which had previously been explored by the Club, though from a 

 different point of view, viz., ornithology and oology, while on this 

 occasion geology was the line of investigation. The party, which 

 met at Spencer-street at 6.45 on Easter Monday morning, 26th 

 March, was rather small. We were joined at Myrniong, some 

 six miles from Bacchus Marsh, on the Ballarat road, by one of 

 the leaders, the other being unavoidably absent. 



Here, at " Dunbar," we found a very cordial welcome and a 

 pressing invitation from Mrs. Brittlebank to a late breakfast 

 (10.30 a.m.) before starting on the work of the day. The 

 situation of "Dunbar" is most picturesque, looking down into the 

 Werribee Valley, with Melbourne and the Dandenong Ranges in 

 the distance and the You Yangs on the right, while much nearer, 

 almost behind us, is Mt. Blackwood. 



Since the last Club excursion in these parts the Werribee 

 Gorge has come into prominence as the scene of unmistakable 

 evidences of glacial action, and to see these was the principal 

 object of our visit. Three of our party, however, were bent on 

 photographing some of the rugged cliffs or shaded pools to be 

 found there. After glancing at a large geological map of the 

 Gorge, in order to somewhat fix its features in our minds, we 

 started off down the Myrniong Creek, which for some little 

 distance runs almost parallel, though not straight, with the 

 Werribee, forming, before joining the latter, what is known as " The 

 Island." All the creeks or gullies of the district have steep, 

 rugged banks, consequently geological sections are easily found, 

 and our leader was soon pointing out the various formations, and 

 directing our attention to the stones lying about, many of them 

 striated by the action of ice. 



On reaching the junction of the Myrniong Creek and Werribee 

 River, we went a short distance up the latter stream, in order to 

 see an example of a " roche moutonnee," or grooving in the bed- 

 rock, in this case silurian, which had been uncovered some time 

 before by Mr. C. G. Officer. We then started on our scramble 

 down the river, over or round huge stones or fallen masses of rock, 

 generally between precipitous cliffs, showing excellent sections, 

 varying from 150 to 450 and in one place to 620 feet above the bed 



