TWENTIETH CENTURY TEXT-BOOKS. 



ZOOLOGY. 



ANIMAL ,STUDIES. A one-book course in 

 Zoology for secondary schools. By DAVID 

 STARR JORDAN, President of Leland Stanford 

 Jr. University ; VERNON L. KELLOGG, M.S., 

 Professor of Entomology, Leland Stanford Jr. 

 University ; and HAROD HEATH, Professor of 

 Zoology, Leland Stanford Jr. University. 



ANIMAL LIFE. A First Book of Zoology. 

 By DAVID STARR JORDAN and VERNON L. 

 KELLOGG. i2mo. Cloth. 



ANIMAL FORMS. An Elementary Text-Book 

 of Zoology. By DAVID STARR JORDAN and 

 HAROLD HEATH. i2mo. Cloth. 



ANIMALS. A Text-Book of Zoology. By 

 JORDAN, KELLOGG, and HEATH. (The two 

 foregoing in one volume.) I2mo. Cloth. 

 TEACHER'S MANUALS. 



ANIMAL STRUCTURES. A Laboratory 

 Manual of Zoology. By D. S. JORDAN and 

 GEORGE C. PRICE, Associate Professor of Zo- 

 ology, Leland Stanford Jr. University. I2mo. 

 Limp cloth. 



OUTLINES OF ZOOLOGY. By J A. 



THOMSON. 332 Illustrations. Third edition, 

 revised and enlarged. I2mo. Cloth. 



TEACHERS' MANUAL OF BIRD-LIFE. 



A Guide to the Study of our Common Birds. 

 By FRANK M. CHAPMAN. To accompany the 

 following portfolios, and not sold separately : 



PORTFOLIOS OF COLORED PLATES. 

 No. I. Permanent Residents and Winter Visi- 

 tants; 32 plates. No. II. March and April 

 Migrants; 34 plates. No. III. May Migrants, 

 Types of Birds' Eggs, Nests, etc. ; 34 plates. 

 Price of Portfolios, each, $1.25 ; one Portfolio 

 with one Manual, $2.00 ; three Portfolios with 

 Manual, $4.00. 



D. APPLETON AND COMPANY, NEW YORK. 



