BOOKS OF REFERENCE. 181 



3. Coelenterata : Hydroids, Jelly-fishes, Polyps, etc. 



2. Porifera : Sponges. 



1. Protozoa : Amoeba, Paramcecium, Vorticella, etc. 



BOOKS OF REFERENCE FOR THE ZOOLOGICAL 

 LABORATORY. 



Of the following books, Nos. 1 to 9 are almost indis- 

 pensable. For general reference, at least, one of the first 

 three should be at hand, and every one of 4 to 9 gives 

 great aid in practical work. 



1. TEXT-BOOK OF ZOOLOGY. Glaus & Sedgwick. Macmillan & Co. 



2 vols. $8.00. 



2. ZOOLOGY. Packard. Henry Holt & Co. $3.00. 



3. TEXT-BOOK OF ZOOLOGY. Nicholson. D. Appleton&Co. $1.50. 



4. HANDBOOK OF INVERTEBRATE ZOOLOGY. Brooks. Cassino. 



$3.00. 



5. PRACTICAL BIOLOGY. Huxley & Martin. Macmillan & Co. 



$1.50. 



6. PRACTICAL PHYSIOLOGY. Foster & Langley. Macmillan & Co. 



$2.00. 



7. GUIDES FOR SCIENCE TEACHING. Hyatt and others. D. C. 



Heath & Co. 10-40 cts. each. 



8. FIRST BOOK OF ZOOLOGY. Morse. D. Appleton & Co. $1.00. 



9. ZOOTOMY. Parker. Macmillan & Co. $2.25. 



10. THE CRAYFISH. Huxley. D. Appleton & Co. $1.75. 



11. ANATOMY O,F VERTEBRATED AND INVERTEBRATED ANIMALS. 



Huxley. 2 vols. D. Appleton & Co. $2.50 each. 



12. GUIDE TO THE STUDY OF INSECTS. Packard. Henry Holt & 



Co. $5.00. 



13. INSECTS INJURIOUS TO VEGETATION. Harris. Cassino. $6.00. 



