INTRODUCTION. 7 



vertebrates of Vineyard Sound " indispensable. This was 

 published in the Eeport of the U. S. Fish Commission for 

 1871-2, but separate copies may be had from dealers in 

 scientific books. Emerton's " Life on the Seashore" (Cas- 

 sino) covers much the same ground, but in a more elemen- 

 tary manner. For the identification of vertebrates Jordan's 

 " Manual of the Vertebrates" (McClurg) is the standard. 

 There are two good works upon molluscs, Woodward's 

 " Manual of the Mollusca " (London) and Tryon's " Struc- 

 tural and Systematic Conchology," 3 vols. (Philadelphia), 

 both well illustrated. The insects are treated well in Corn- 

 stock's " Manual of the Study of Insects" (Comstock Pub. 

 Co., Ithaca, N. Y.) and Hyatt and Arms' "Insecta" 

 (Heath, Boston). An older work, but still of great value, is 

 Harris' "Insects Injurious to Vegetation " (Boston). 



There are several works dealing with birds. Of these 

 possibly Coues' "Key to North American Birds" (Estes & 

 Lauriat) is most widely known. Ridge way's " Manual of 

 North American Birds" (Lippincott) is also good, as is 

 Chamberlain's edition of Nuttall's " Ornithology " (Boston). 



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. The teacher will find much valu- 

 able material in the zoological articles in the Encyclopedia 

 Britannica, though these are very unequal in treatment. 

 Some of the best of them have been reprinted in " Zoologi- 

 cal 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. 



