40 HISTORY OF BRITISH PERNS. 



more liable to become injured and broken than such as are 

 fastened to the paper. 



The specimens should be fully labelled, the labels giving 

 at least their names, the locality where gathered, and the 

 date ; and these labels should, as far as possible, be fixed 

 with some degree of uniformity as to their position, so as to 

 be readily referred to by turning up one of the corners of 

 the sheets of paper. 



The papers to which the specimens are affixed should be 

 enclosed in paper covers, each genus separately ; and these 

 covers should be placed either on the shelves of a cabinet, 

 or in drawers, or in any convenient place where they may 

 be preserved against dust, the attacks of insects, and other 

 casualties. 



