56 Mr. R. I. Pocock on a new 



will (dated March 2, 1841). Upon his death in 1863 they 

 came into the possession of Lis sister, Miss Anna Burchell, 

 who offered the whole of them to the University of Oxford 

 in the following year upon the condition " that separate rooms 

 shall be set apart for them, and that the whole be put out, 

 set up, and systematically arranged, and be called ' The 

 Burchell Collection ' or presented to the Museum by Wm. J. 

 Burchell, Esq., D.C.L." The Delegates of the Museum were 

 unable to accept these conditions. A few months later 

 Miss Burchell wrote (April 8, 1865) concerning "the collec- 

 tions in Zoology and Entomology," " 1 am still desirous, in 

 accordance with what I believe to have been his [Dr. Bur- 

 chell's] wish, of presenting the same to the University of 

 Oxford." The only condition was " that the Collections 

 should be distinguished as those of my late Brother." This 

 offer was gratefully accepted, and in a few weeks the collec- 

 tions arrived. About the same time the immense Herbarium 

 was offered by Miss Burchell to the Linnean Society, which 

 was unable to accept it. A little later it was presented to 

 the National Collection at Kew. 



In drawing up this brief account of Burchell, as a preface 

 to the description of his collections, I desire above all to 

 acknowledge the kind help I have received from Miss Cora 

 B. Sanders in the study of Burchell's manuscript at Kew and 

 Oxford, and of his collections in the Hope Department. It has 

 been already mentioned that the map forming Plate IIP. is en- 

 tirely due to Miss Sanders's researches. I have also received the 

 kindest assistance and encouragement from Sir Joseph Hooker 

 and also the authorities of the Royal Gardens at Kew. The 

 Delegates of the Oxford University Museum have kindly 

 given me access to their correspondence and minute-books. 



II. On a new Stridulating-organ in Scorpions discovered by 

 W. J. Burchell in Brazil in 1828. Bv R. I. Pocock, 

 F.Z.S. 



[Plate IV.] 



Up to the present time stridulating-organs are known with 

 certainty to exist in three genera of scorpions, namely, the 

 Oriental genus Palamnceus, the tropical African and Arabian 

 genus Pandinus, and the South-African Opisthophthalmus, 

 all belonging to the family Pandinidse. The certainty in 

 these cases lies in the fact that in both Palamnceus and 

 Opisthophthalmus the hearing of the sound preceded the 

 anatomical investigation which led to the discovery of the 

 organ, and that in the species of Pandinus an organ exists 



