Sandstones and their Fossils. *^61 



I have now a very important addition to make to the Bacchus 

 Marsh Sandstone Flora in the genus Cn/amites, and this record 

 is a strikingly strong confirmation of the correctness of placing 

 these beds on the Pcrmo-Carboniferous horizon, and of re- 

 ferring its fossil plant remains to the Glossopteris Flora. Dur- 

 ing November last 1 had a party of students at Bacchus Marsh 

 for field geological work, and during our investigations in the 

 lower Gangamopteris quarry overlooking the Korkuperrimal 

 Valley, one of my assistants, Mr. Stanley Mitchell, drew my 

 attention to a plant impression on a large block of stone, and 

 on this being opened out, several points of interest presented 

 themselves. The most likely portions for study w^e carefully 

 wrapped up and considered later. T then found that some por- 

 tions had been left behind, which might possibly throw further 

 light on the specimen as a whole. Accordingly, accompanied 

 by Mr. V. R. McNab, I paid another visit to the locality, and 

 we were fortunate enough to secure the missing parts, and to 

 open up several other similar impressions. 



Calamites macnabi, sp. IIOV. 



In this preliminary note I desire to name as above, certain 

 stem impressions, and stem iujpressions with lateral branches, 

 the latter being charged with narrow linear leaf impressions. 



The first specimen is on a slab about 18 inches broad by 8 

 inches high, and shows a broad flattened stem impression of 6 

 inches width, showing two nodal regions and a portion of a 

 third, and these regions are placed approximately 3 inches 

 apart. From the two well-defined nodal regions, two side 

 branches are given off, each about one inch Avide. Adjoining 

 these branches are the leaf impressions, apparently carried on 

 a thin, sheath-like envelope. There are about 3 or 4 leaf 

 impressions in the inch Avidth, but instead of showing a regular 

 annular arrangement they appear to be in oblique series. On 

 these branches the leaf impressions are about three-quarters of 

 an inch in length, and about one-sixteenth to one-twentieth of 

 an inch broad at the ])ase, with a strong medial ridge. 



Another specimen showing a narrower stem, about 2^ inches 

 at the nodal reaion. shows a much greater distance between 



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