INVERTEBRATE ANIMALS. 67 



bat wlie re there is any difficulty, it must be left to the ingenuity 

 of the operator. 



Those travellers who do not wish to take the trouble of 

 skinning fishes themselves, should preserve them in barrels of 

 spirits. Each should be wrapped up in a separate piece of 

 cloth, to prevent their scales being rubbed off by friction. 



When travellers intend to preserve fish in spirits, they ought 

 to provide themselves with casks of from four to ten gallons, 

 well bound with iron hoops. An opening is cut near the bung- 

 hole, of the dimensions of six inches by four, of this shape y. 

 The piece of wood cut out must be so bevelled, outwardly, that it 

 cannot fall into the cask, and must be used as a stopper, when 

 the ban-el has been filled with specimens. The fish put in 

 should each be numbered with a small leaden ticket, or piece 

 of wood, with the number turned or cut out, and corresponding 

 notes taken of its locality, whether male or female, and of its 

 name, if known, or the provincial name of the country, with any 

 other circumstance connected with its history which can be 

 procured. When the barrel is filled, the stopper must be put 

 in, and hermetically sealed, to prevent the evaporation of the 

 liquor. 



If a female is procured, much swollen with spawn, an opening 

 must be made at the anus, and the spawn extracted by it. 

 The liquor must not be too strong, otherwise it will injure the 

 colours of the fish. See the strength mentioned in the receipts. 



DIVISION II. INVERTEBRATE ANIMALS. 



CLASS I. MOLLUSCA. 



This class contains all the animals which are soft, and des- 

 titute, of a spine ; namely, Cuttle Fish, Univalve and Bivalve 

 Shells, Turbinated Animals, and the Cirrhipeda. 



CUTTLE FISH, and all other Mulluscous animals, can only 

 be preserved in spirits. The same observation applies to the 

 animals which inhabit that numerous tribe called Testaceous 

 Shells. They must be detached from the shells, and put into 

 spirits, while the shells themselves must be preserved, inde- 

 pendent of the animal. 



