(21 



2. Itinerary of the Percy Sladen Memorial Expedition to 

 the Orange Riveb,* 1910-1911. {Report No. 7.) t— By 

 H. H. W. Pearson, Sc.D., F.L.S. 



The expedition set out from Cape Town on November 23, 1910; 

 reached the Orange River at a point between Bethany and Skate's 

 Drifts (opposite the German Police Barracks) on the morning of 

 December 29th ; and concluded its work at Van Bhyn's Dorp on 

 January 23, 1911. 



The route from Eendekuil — at that time the terminus of the 

 North- Western Railway line — to O'okiep deviated but little from 

 the post-cart road. From Annenous (a station on the O'okiep-Port 

 Nolloth Railway) the track followed is not accurately laid down 

 throughout its length on any existing map. Many of the localities 

 visited north of O'okiep are indicated on sheets 127 K and L, 127 F, 

 and 127 E of the Reconnaissance Maps of the British War Office. 



Except in the deviations from the main route from Numees Mine 

 to Kuboos and from O'okiep to Anegas, Mr. B. Melle, of the South 

 African College, accompanied the expedition throughout the journey. 

 Mr. N. S. Pillans, of the Union Department of Agriculture, was 

 attached to the expedition from November 23rd to December 16th 

 (Cape Town to O'okiep), and rendered valuable assistance in the 

 collection of living and dried plants in that portion of the journey 

 I have much pleasure in recording my indebtedness to these 

 gentlemen. 



* Assisted by a grant from the Royal Society. 



f The following Reports have been published or are in the press : — 



No. 1. "Travels of a Botanist in South-West Africa," by H. H. W. Pearson, 

 Journal of tlie Royal Geographical Society, 1910. 



No. 2. "The Anatomy of Welwitschia mirabilis, Hook. f. in the Seedling and 

 Adult States," by M. G. Sykes, Trans. Linn. Hoc, vii. (1910)., p. 327. 



No. '6. "On the Seed-coat of Carica Papaya," by E. L. Stephens, Annul* of 

 Botany, 1910. 



No. 4. " On the Embryo of Welwitschia," by H. H. W. Pearson, Annul* of 

 Botany, 1910. 



No. 5. Ann. S.A. Museum, ix., 1. 



No. 6. (In the press.) 



