lOG HOKN KXI'EIHTIOX — NAliltATlVi;. 



Eight species will tlduhtlcss iijipcai' ;i very .siii,-Ul miiiibrr, in t'acL it' wc excluik' 

 tlio little. Gdl'iiii ercj/iii/s which whs only foiiud in two aitilicial pools in the Lower 

 Stcpjics the nuMiljcr which is chai'actcrislic, so far as yet known, of the water-holes 

 amongst the ranges of the Higher Steppes, whence^ those ou the Lowi'r Steppes are 

 stocked is only seven. Of those secured by us all e.\ce})t on(; {Plotosiis ar^oitus) 

 are widely distributetl thr(nighout the water-holes amongst the llanges and exist 

 in comparatively large numbers — that is in jjroportiou to the size of the water- 

 holes to which except just during and after the rain season they are restricted. 



jVmongst the plants a certain iiumtjer of additions to the collection were made 

 tlie most important being Styplielia JMitclicI/ii, a single colony of which was founil 

 growing high up on Mount Sonder. This was (.)f interest as it was the only 

 Epacrid found during tlie whole ]*]xpeditJon, tliough of the genus Stypheiia more 

 than on(^ hunilreil and sexenty species are recorded from Australia, tlie head- 

 quarti;rs of the genus being AVest Australia which lias aljout one hundred and ten 

 specie's. This jiarticuhir species is also found in Queensland. 



The district was too dry to yield anything like a good harvest to either 

 Botanist or Zoologist and accordingly after two days' spell, during which we 

 worked hard witli very disappointing results, we determined to go on to the Einke 

 Goi'ge. Mr. Cowle, who had left us on his return to Illamurta, had reported that 

 the ])assage of the (Jorge was bhickcnl on the north by a water-hole stretching 

 across it, so we had to go souk; twenty-live miles round to get through the ranges. 



The valley in which we were caniped lay U> the south of tlu; irrt'gular mass of 

 ranges some twenty to twenty live; miles in width ami aljout four hundred miles 

 in length, whicii are of Pre-CJambrian age and form the McDonnells proper. To 

 the south of us lay wha,t are usually spoken of as the Southern Mcltonnells liut 

 which are of (_)i-do\ ician (Siluri.-ui) age and lia\'e in the report on the (ieological 

 Work of tlu; Expedition Ix-en spoken of as the nortlu'rnmost part of the James 

 ]{ange, which extends southwards with a mean width of sixty to S(;venty miles. 

 To the south of the Janu's llange again aiul in line with one another are tiie 

 Lieorge (jlill and Levi Ranges. 



Eor the sake of convenience I still use tlu; name Southern McDonnells as 

 ajjplying to the two very di.stinct quartzite ridges which run along parallel to one 

 another for a distance wdiich is jirobably not fa.r slujrt of two hundi'ed and lifty 

 miles. Letween t-he two ridges t-heri; runs tor the; wliole length a, vaJley va,rying 

 ill widtli from at most a mile to a (juarter of a mile to whicli the name of HoKN 

 Valley is now "i\'en. 



