7-2 ARACHNIDES. 



without which it will be impossible to set them up in any way 

 without their breaking. 



Mr Bullock recommended, that Crabs and all other Crus- 

 taceous animals, should be immersed in corrosive sublimate 

 and water for an hour previous to their being put into atti- 

 tudes. 



When the joints become loose they are in general attached 

 by glue, but the cement is much better. 



N.B. On no account whatever use warm water in cleaning 

 Oustaceous animals as it is certain to change their colours. 



CHAP. IV. 



OF PRESERVING SPIDERS, GALLY-WORMS, AND INSECTS* 



CLASS VIL ARACHNIDES. 



This Class includes all animals of the Spider kind. Those 

 were formerly arranged amongst insects, but they have been 

 formed into a separate class by Lamarck. 



The general directions which we shall give respecting 

 insects, hold good as to Spiders, only we must mention 

 there is considerable difficulty in preserving the bodies of 

 Spiders, which generally, in a very short time, shrink into a 

 shapeless mass. To prevent this, the body should be pricked, 

 with the triangular awl, plate VI. fig. 8, and the contents 

 pressed out; it should then be stuffed with very fine carded 

 cotton or down, which can be pushed in by a heckle tooth, or 

 one of the prickers, Nos. 9. and 10. of plate VI, blunted a 

 little at the point. When properly distended, the small aper- 

 ture should be filled up with a little cement, or a solution of 

 gum-arabic. The legs of the larger species, such as the 

 Bird-catching Mygale (Mygak avicularia) , and the Scorpions, 

 are also liable to shrink, and should be stuffed in the same 

 manner as that of the body. 



In those species of Spiders which we have thus prepared, 



