388 MANIPULATION. 



phial will then be in the position to receive the water, which 

 wiU run in rapidly and carry both animalcules and weeds 

 •with it. The contents of the phial may be either viewed 

 with a pocket lens, or poured into another phial and then 

 examined ; if any animalcules be present, and worth keeping, 

 they may be corked up for further inspection. Dips should 

 be made both among confervse and duck-weed, and portions of 

 the weed allowed to enter the phial ; a dip also among rushes 

 is frequently very rich ; the phial should be shaken about as 

 it is being turned up to receive the water. If the phial be a 

 very wide-mouthed one, a sudden dip amongst large weeds 

 wiU afford very many species ; these, after examination, may 

 be placed in smaller phials, and corked up for further inspec- 

 tion at home. If any larvse or other voracious kinds are 

 present, they should be removed with one of the fishing-tubes, 

 otherwise they wiU destroy nearly all that come in their way 

 before the collector reaches home. For all the larger specimens, 

 such as the Monoculus and Cyclops, the net shown at d in 

 fig. 252 win be required; if this be dipped very suddenly 

 under weeds and be as suddenly lifted up, they wiU be caught; 

 by holding the bottom of the net in the water, and the ring 

 out, all weeds that are in the way may be removed, and the 

 produce then poured into a phial with a small quantity of 

 water, and the voracious ones taken out by the fishing-tubes 

 in the manner before described. If the Water-fleas and 

 Daphnias be very abundant, they may be got rid of in the 

 following manner : — As soon as they are placed in the phial 

 they go very quickly to the bottom ; if, therefore, the upper 

 water be poured into another phial, the bottom containing 

 them may be thrown away; if, also, the phial be shaken 

 about in the water before it be turned over to be filled, they 

 wiU generally have darted away. Small newts, and many 

 larvjE, should be taken great care of, the former especially, 

 as, when young, their branchias are present; in these and 

 in their feet the circulation of the blood is most beautifully 

 seen ; they wiU also be found of essential service for eating up 

 the Daphnise, Monoculi, and the various larvae that destroy 

 the different kinds of vorticellaj. The inverted phial should 



