AFRICAN RESEARCHES. 401 



reason to conclude accompanied the desolating torrents that 

 have passed over, and excavated and broken up, the first de- 

 posited beds. 



At Studland, where this conglomerate occurs, also is seen 

 one of the most remarkable proofs of the occurrence of up- 

 lifting forces after the deposit of the plastic clay ; and this 

 we shall presently consider. But generally speaking, where 

 the chalk and super-incumbent deposits have not been shat- 

 tered and up-heaved, the pebbles in question occur at the out- 

 crop of the chalk, on the slope of the tertiary basin, and ex- 

 tend only so far into the interior of the deposits now filling 

 that basin, as is compatible with the belief that they repre- 

 sent what they once were, namely, a littoral shingle. 



(To be continued). 



REVIEWS. 



Art, I. — 1. Narrative of an Expedition into Southern Africa, during the 

 years 1836 and 1837. By Captn. W. C. Harris, H. E. I. Company's 

 Engineers, &c. Bombay: 1838. Re-published by Murray, London: 1839. 



2. An Expedition of Discovery into the Interior of Africa, under the auspi- 

 ces of Her Majesty's Government, and the Royal Geographical Society. — 

 By Capt. Sir James Edward Alexander, K.L.S., &c. 2 vols. 12mo. 

 London : Colburn. 1839. 



The steps which have led to a knowledge of the continent of 

 Africa, viewed in its geographical relations, are so intimately 

 associated with our insight into the Zoology of this intensely 

 interesting portion of the globe, that contributions to Natural 

 History seem almost of necessity to be part and parcel of the 

 results consequent upon exploring expeditions to its interior. 

 Bruce, Le Vaillant, Burchell, Rupell, and Smith, are names 

 too prominently enrolled on the pages that chronicle the pro- 

 gress of science, to render a syllable of comment on their la- 

 bours necessary, or on the possession of that true spirit of 

 philosophical enterprise, and unflinching zeal in the pursuit 

 of knowledge, which led them to face the perils and difficul- 

 ties that attend the traveller in his path through the African 

 forests. 



The announcement of the first work on our list, — the nar- 

 rative of an expedition into Southern Africa by an officer in 

 the Bombay Engineers, whose name is coupled with a bril- 

 liant addition to the antelope tribe, in the discovery of that 

 magnificent species, the Aigocerus niger, 1 — led us to antici- 



1 Described and figured by Capt. Harris, in the last part of the Zoologi- 

 cal Transactions. 



