314 NATURAL HISTORY OF OUR SHORES 



in formalin solution. This is the species shown in 

 Fig. 100. 



The large simple ascidians (Ascidia virginea, etc.) keep 

 well in formalin ; only it is necessary to prepare them by 

 an anaesthetic, so as to keep the processes in which are their 

 inhalant and exhalant apertures extended (see Fig. 102). 



The Fishes. Small species, such as the gobies, blennies, 

 etc. etc., preserve beautifully in the formalin solution. 

 They are best displayed in the jar by fastening to a sheet 

 of mica, having the jar of ample size, otherwise they rest 

 on their tails (unless they are suspended to the stopper). 

 They keep their colour remarkably well in this solution, 

 far better than in spirit. The larger species had better be 

 handed over to the taxidermist. 



There are various methods of fish taxidermy, but even 

 the most simple would take half this volume to explain, 

 and then might not be clear. A few lessons from a pro- 

 fessional would be better than a week's reading. 



In recommending mica plates for fastening specimens 

 in proper position for display I have done so on account 

 of its being very easy, simply sticking a needle and thread 

 through both specimen and mica (not showing to front), 

 and tying neatly at the back ; but sheets of glass cut to 

 fit vertically inside the jar, and with holes drilled through 

 in the proper places, are better. A small glass bead at the 

 back of the plate gives a neat and secure fastening for the 

 thread. 



Drilling the glass is by no means difficult. It will drill 

 easily with a simple little stock and drill, such as are used 

 by fretwork cutters, touching up the drill now and then on 

 an emery stone. If the surface of the glass is scratched, or 

 just dented with the end of a broken file, the drill will 

 " bite " at once. As soon as the point shows through the 

 hole should be finished from the reverse side, to avoid 

 starting off a " flake." 



