

L i 



r 



\ 



St^ct XL] 



200L0GY. 



' = 



O 



7 



species observed darting about in the fresb water of foreign 

 countries should be preserved in tubes, in spirit or solution 

 No. I. The larger kinds of marine Crustacea should be 

 suffered to die in fresh water before immersion in the 

 preserving liquor. The different kinds of kina-crab 



{Limuhis) usually found on sandy or muddy coasts are 

 particidarly worthy of preservation in spirits or solution 

 with the ova or young. 



In preparing Crustacea for drying care is to be taken 

 to preserve all their external parts as perfect and as ex- 

 pressive of the natural progressive action as possible. 

 Crabs and lobsters should be cleaned out as soon as 

 practicable, i. e.^ the soft internal parts and the flesh 

 should be removed, and they should be soaked in fresh 

 water previous to drying. The claws when large require 

 to be separated at each joint for the purposej and then 

 refixed, or a small piece may be neatly removed and 

 afterwards replaced- When dried, the specimens should 

 be wrapped in very soft paper and then packed in cotton, 

 so as not to allow of their being displaced in the case nor 

 to touch one another. It is desirable, wdth regard to 



brilliantly- coloured crabs, to w^ash them over, alter they 

 are dried, with a thin coat of the following varnish : 



Varnish for Crabs, Eggs. &c. No. I. 



Common gum 

 Gum tragacanth . 



4 02. 



Joz. 



Dissolve these in three pints of waterj add to the solution 20 grains of 

 corr- Ive sublimate, and 20 drops of oil of thyme, dissolved in 4 oz. of 

 spirit of wine ; mix it well, and let it stand for a few days to sei;arate: 

 the clearer part is to be used as varnish ; the thicker part forms an 

 excellent cement. 



A very important subject of investigation is the develop- 

 ment of the Crustacea from the earliest period at which they 



