INTRODUCED SPECIES xciii 



of any but the European Keptiles, I took the specimen to Mr. 

 Boulanger of the Natural History Museum, South Kensington, 

 who readily identified it as Pseudocordylus microlepidotus, a native 

 of the interior of South Africa. At that time this species was so 

 rare in European museums, that its occurrence as a waif in Lake- 

 land would have been thought extremely improbable. There can 

 be no doubt, however, that it had been intentionally imported 

 alive, and that it had escaped from some travelling show. On 

 the other band, the introduction into our midst of Gecko mauri- 

 tanicus, was a pure accident. It had dropped into a box of oranges 

 in the packing-shed, had been overlooked, and travelled safely to 

 Carlisle, where it was discovered in full health and vigour. Mr. 

 "William Duckworth, whose interest in zoological matters has so 

 materially assisted local progress, secured the Gecko as a specimen, 

 and sent it up to me for determination. 



The introduction of fishes into new localities is of such great Fishes. 

 importance, and, moreover, occurs so very frequently, that 

 angling associations as well as private owners of fisheries 

 should endeavour to record their operations in print as often as 

 possible. Undoubtedly, the most interesting addition made to 

 our fish-fauna of late years was the introduction of the Grayling 

 (Thymallus vulgaris) into the upper waters of the Eden. Par- 

 ticulars of this will be found at pp. 518, 519. Considering the 

 relative abundance of the Grayling in many Yorkshire streams, 

 it is a matter for some surprise that this game fish had so long 

 remained a stranger to the waters of Lakeland. 



