MYRIAPODA. 589 



placing them on a piece of cork, floating on water in a ba- 

 sin, the mouth of which is covered lightly with a damp 

 cloth. In a few hours the joints will become sufficiently 

 supple. 



The entomological collection is kept in drawers of hard 

 wood, with moveable glass covers. The bottom of each 

 drawer is covered with cork or wax, for the reception of the 

 pins supporting the animal. It is washed over with arsenic, 

 or corrosive sublimate, and covered with white paper glued 

 to it. The insects are distributed in rows, with their 

 names marked on the paper below, or with a number re- 

 ferring to a catalogue. The collection must be frequently 

 inspected, to see if any insect depredators have got admis- 

 sion. These must be carefully removed, and their eggs 

 destroyed, by baking the specimens to which they have 

 been attached, in the sun, or before the fire. If they need 

 washing, it may be done with a hair pencil, dipped in rec- 

 tified spirit of wine. 



Subdivision II. ANNULOSE ANIMALS DESTITUTE OF AR- 

 TICULATED LIMBS FOR LOCOMOTION. 



The methodical distribution of this great branch of an- 

 nulose animals, presents a considerable degree of difficulty. 

 The species, in general, are small in size, and the dissec- 

 tions of the organs must be conducted under the guidance 

 of the microscope. The vessels are often too thin in the 

 coats to suffer the injection of coloured fluids, or even infla- 

 tion with air. The characters of many of the genera, 

 therefore, still remain in obscurity, and the arrangements 

 which have been proposed are necessarily defective. In the 

 plan which we propose to follow, the external tribes, or 

 those which live immediately exposed to the air or water, 

 will occupy the first division, and the Interned tribes, 

 termed Entozoa, or those which dwell in the inside of the 



