INTRODUCTION. 13 



There are also several more special works which are of 

 great value in the laboratory or study-room. Among 

 these are Huxley's "Crayfish" (Appleton & Co.), Ecker's 

 "Anatomy of the Frog" (Macmillan), Darwin's "Earth- 

 worms and Vegetable Mould" (Appleton) and his "Coral 

 Reefs." Dana's "Corals and Coral Islands" (Dodd, Mead 

 & Co.) is a later work. Flower and Lydekker's "Mam- 

 malia" (Edinburgh) is excellent. The teacher will find 

 much valuable material in the zoological articles in the 

 Encyclopedia Britannica, though these are very unequal 

 in treatment. Some of the best of them have been re- 

 printed in "Zoological Articles" by Lankester and others 

 (A. & C. Black). 



A dictionary of scientific terms is frequently asked for. 

 Any of the more recent unabridged English dictionaries 

 will contain almost every zoological term one runs across. 

 Several so-called dictionaries of scientific terms have been 

 published, but as yet not one of any value has appeared. 



The teacher should remember that science is continually 

 growing, and that text-books and manuals grow old. He 

 should therefore have access to some of the scientific jour- 

 nals. Among those most valuable to the teacher of natu- 

 ral history are the American Naturalist (Boston) and 

 Biological Bulletin (Lancaster, Pa.). Nature (London) 

 and Science (New York) are weekly publications which 

 include all sciences. The Journal of the Royal Micro- 

 scopical Society (London) is valuable, since it contains not 

 only an account of new methods, but summaries of recent 

 investigations in both botany and zoology. Its price is 

 unreasonably high. 



