48 



Keg Toy M, or the Mirr.vt Desert. — This region is the 

 southerly extension of the eastern section of the Central 

 Australian Region. It may he defined as the whole of the 

 country (exclusive of Region E) to the east of the Adelaide 

 chain, and its N.E. extension towards the Barrier Ranges. Its 

 physical features are very pronounced, for whilst the region to 

 the west is occupied by elevated ground of Paheozoic age. the 

 Murray Desert is a plain constituted of Tertiary rocks. Like 

 that of the Central Australian Region, the rainfall is absolutely 

 small. 



The geophilous florula of this region, excepting the exclu- 

 sively maritime species, is of the same type as that of Region 

 C, though it possesses fewer restricted species. The fluviatile 

 and paludinal species of the River Murray, which receives little 

 or no drainage in its passage through this region, assimilate 

 the vegetation of the Murray Region to that of Region S c. 



Region E, or that of the South-East, being the extreme 

 south-east corner of this colony, centred about the volcanic- 

 area of Mount Gambier. To the Rev. J. E. Tenison "Woods, 

 E.L.S., &c, my obligations are due for the use of a MS. list of 

 plants observed by him in the South-East district of this colony 

 between the years 1857 and 1867. It contains the names of 

 over 200 species hitherto unrecorded for that part of South 

 Australia. Baron F. von Mueller is the authority for nearly 

 all of them. Its vegetation has the general characteristic of 

 that of Region S c, and is mainly distinguished from it by the 

 possession of species which here reach their western limit. The 

 sole representative in South Australia of the order Capri- 

 foliacea? occurs in this region. The northern boundary line of 

 the region must be somewhat south of the railroad connecting 

 Kingston and Narracoorte. 



Region S, or the South Australian Region, embraces the 

 rest of the province. It may be divided into the following 

 districts : — 



a. The country to the north of the head of St. Vincent's Gulf. 



i. Eyre's Peninsula, and westward to the head of the Great 



Australian Bight, south of the south-western boundary of 



Region C. 



c. The country south of District a, east of St. Vincent's Gulf, 



and on the east limited by the Murray Desert. 

 cl. Yorke's Peninsula. 

 Jc. Kangaroo Island 



The prominent botanical features of Region S have been 

 referred to under Region C. 



Note. — The capital and small letters in the columns indi • 

 eating the distribution of a species are correspondingly those 

 of the regions and districts used in the foregoing paragraphs. 



