310 



THE FOEAMINIFERA 



rectangular piece punched out of the middle,; to this 

 is glued at the hack a form stuck on thin cardboard, 

 on which are photographed or lithographed a number 

 of divisions, each having a numeral placed in the 

 corner in rotation. The mount is covered for 

 security by a case made from a 8 by 1 inch glass 

 slip, a piece of thin cardboard of the same size, and 

 a piece of tinted writing paper cut to enclose the 

 whole. The card is glued to the centre of the paper, 

 and lunettes punched out at the ends for the in- 



Fig. 41. — Method of Mounting a Series of 



FOEAMINIFERA ON OnE SlIDE. 



sertion of the finger-tip when removing the sheath. 

 The tray is placed on the top of the card and covered 

 with the slip, and the edges of the paper turned up 

 and fastened over the slip (fig. 41). These mounts 

 are very convenient for the storage space they afford 

 for the little specimens, and when covered with the 

 case they are quite dust-tight. They may be made 

 of various widths, keeping to the 3-inch length as 

 convenient, and to contain 10, 80, 50, or even 100 



