FIELD WORK. 13 



brates. Therefore, specimens of the animals discovered 

 should be taken back to the laboratory, in vials or 

 other suitable receptacles, for further study and for 

 identification. 



Each specimen taken to the laboratory should be 

 properly numbered, and all necessary notes of the place 

 and circumstances of finding, and of other discovered 

 facts of habit or behavior should be fully kept. 



Some of the forms seen cannot well be captured, as 

 fish and birds and the larger mammals. Notes should be 

 taken of these and an effort be made to adjust them to 

 the general purposes of this preliminary view of the 

 local animal life. A pair of field or opera-glasses will be 

 valuable for the study of such animals. 



It is not at all necessary that the student shall know 

 the specific and technical name of every animal found ; 

 but one of the very first things needed is the reasonable 

 satisfaction that comes from connecting the various new 

 animals with some type of animal more or less familar 

 to the student. Or, if this cannot be done, he should know 

 that it is a form strictly new to him. 



Each student should thus be brought into personal 

 contact with all the materials captured and with all the 

 data collected by the class, through the effort to trace 

 out the kinship of the forms brought to the laboratory. 



If the class has been successful, it will probably have 

 specimens belonging to all of the following groups of 

 animals: earth-worms, and possibly some of the smaller 

 water-worms which may not be seen until the jars of 

 stagnant water have stood in the laboratory for a day or 

 two; snails; mussels; "thousand legs"; "Daddy-long- 

 legs"; spiders; many kinds of insects, as bees, ants, cater- 

 pillars, "grubs," butterflies, " bugs, " grass-hoppers, and 



