THE MICROSCOPE. oD 
out one by one in a tumbler of sea water. Many 
minute crustacea will be found to come out of them. 
Take a very small piece of cotton wool, dip it into 
sea water and tease it out on a glass slide until it 
covers a space the size of one of the thin glass 
covers. Catch with a dipping tube* one of the 
small, transparent, shrimp-like amphipods. Drop the 
contents of the dipping-tube into a watch-glass, and 
remove the amphipod from the watch-glass, and 
transfer it to the cotton wool on the slide by means 
of a small camel-hair brush. Cover with thin glass, 
and see that the water on the cotton wool is neither 
too much nor too little. 
6. Examine with the inch, and afterwards with the quarter 
objective. On the back, just behind the head, the 
heart will be seen pulsating. Notice the valves. In 
various parts of the body, particularly in the legs, 
the circulation of the blood corpuscles can be well 
seen. The dark radiate spots on the integument are 
pigment spots. 
The amphypods are small crustacea with foot-jaws, 
sessile eyes, and respiratory organs attached to the thoracic 
limbs, of which there are seven pairs. 
For the New Zealand species, see Miers’ Catalogue of the Crustacea 
of New Zealand, p. 117 (Geological-Survey Department, 1876), and G. M, 
Thomson, Transactions N.Z. Institute, vol. XI., p. 235. 
* A dipping tube is a glass tube open at both ends. You place your 
finger over one end, and bring the other end near the object to be caught ; 
then on removing your finger, a current of water rushes up the tube 
carrying the object in with it. 
