INTRODUCTION. XIX. 



notes, designed to render the Synopsis in this respect useful 

 as a handbook to the Collection. 



Frontispiece. To admit as much light, and to obstruct 

 the view of the specimens as little as possible, the upper 

 wooden frames of the table cases are reduced to the narrow- 

 est limits consistent with firmness and security. In the 

 upright compartment, the top, bottom, and ends, as well us 

 the sides, are of plate glass, and if a shelf is required it is 

 made of the same material. To give readier access to the 

 specimens, both sides of the upper compartment fall. To 

 exclude the dust, piano-forte hinges are used ; each frame 

 closes on double strips of velvet ; ziuc gutters underlie every 

 crevice ; and in addition to the locks, bolt screws are used, 

 which by a half-turn bind the frames closely down in every 

 part. 



As text-books for students of Zoology, the following works 



may confidently be recommended : A Manual of Zoology, by 



* Henry Alleyne Nicholson, M.D. ; and Introduction to the 



Study of Biology, by the same Author. Published by 



W. Blackwood and Sons. 



