40 TAXIDERMY AND MODELLING 



" Sea-anemones " such as Actinia equina and A. cari are 

 fixed by the above mixture (boiling), followed by chromic acid 

 of \ per cent. 



Such Hydrozoa as Eleutheria {Clavatella), Cladonema, Podo- 

 coryne, and allied forms are killed by flooding them with the 

 above mixture. 



A " Portuguese man of war " {Physalia caravella) is treated 

 in the following manner : — Primarily, the tentacles must not be 

 touched with the fingers, or the flesh will be badly stung. It 

 should be grasped by the pneumatophore and placed in a tall 

 and large cylinder containing sea-water, allowed to remain until 

 the tentacles are fully extended, and then flooded with the 

 above mixture, in the proportions of one quarter to the volume 

 of sea -water in which the Physalia rests. When dead it 

 should be transported (by the means indicated above) into 

 another preparation jar containing chromic acid of \ per cent, 

 followed in about twenty minutes by immersion in alcohol of 

 SO per cent., and finally in that of 70 per cent. (Lo Bianco, 

 p. 456). 



19. — Bichloride of Mercury and Chromic Acid (Lo Bianco, p. 443) 



Bichloride of mercury (saturated solution) . 1 00 parts 



Chromic acid (i per cent.) . 50 ,, 



Amongst the Hydromedusse large colonies of Tubularia and 

 Pennaria are killed by this mixture, which is added in equal 

 proportion to the volume of sea-water in which the polyps lie 

 extended. After a few minutes they are transferred to weak 

 alcohol, followed as usual by strengths leading up to 70 per 

 cent. 



20. — Pyroligneous Acid Mixture (Lo Bianco, p. 457) 



Bichloride of mercury (saturated solution) . "j 



Pyroligneous acid (concentrated) . . \ Equal parts 



Chromic acid (^ per cent.) . . ) 



