PLATE XOII. 349 



in II. Aldousil, and other nearly allied species renders 

 the above differential characters more than is usually 

 necessary in the discrimination of the species. 



I have named this species after my old friend, Mr. 

 W. Lens Aldous, who has drawn the figure represent- 

 ing it on stone in the eighty-second year of his age, 

 with all the accustomed beauty and accuracy that 

 characterises the whole of the plates contained in this 

 work. 



