HERRICK'S GENERAL 

 ZOO LOGY 



By GLENN W. HERRICK, B.S.A., Assistant Professor 

 of Economic Entomology, Cornell University. 



Text-Book $1.20 



Laboratory Exercises 60 



THIS comprehensive course is adapted to any modern 

 system of animal study, and because of the method of 

 treatment and the types selected it may be used advan- 

 tageously in all schools from the Atlantic to the Pacific. The 

 animal forms selected for study give the pupil a good concep- 

 tion of a wide range of forms and also a proper view of 

 the extent and variety of the animal kingdom. At the same 

 time they have been chosen for the purpose of giving point to 

 the modern theories of development and animal history. 

 ^[ Each group is in turn treated with a type form as a basis, 

 and the related forms are sufficiently numerous to permit of 

 the division of each group. Provision is thus made for a brief 

 or an extensive course. Each group may be studied as a unit, 

 thus enabling the teacher to arrange the order of the topics to 

 suit the needs of any particular locality, climate, etc. Ample 

 directions for field work are given, particular attention being 

 paid to forms of economic importance. 



^[ In the laboratory manual a typical member of each animal 

 group has been selected for purposes of illustration, but struc- 

 tural details have been reduced to the minimum in order to 

 afford a clear understanding of the physiological processes. In 

 most cases, however, a sufficient number of alternative forms 

 are given under each group to permit the selection of a type 

 familiar to the pupils of any locality. The laboratory direc- 

 tions are clear and explicit, and recognize* fully the extent and 

 limitations of the average student. 



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