474 zooLoat. 



For more information on our Vertebrate types the reader 

 may refer to the general works already mentioned or cited 

 below, and to Marshall's Vertebrate Embryology a most 

 admirable book. Wilson's The Cell in Development and 

 InJieritance (Macmillan) will give him the fullest account 

 of modern views on the ultimate structure of the cell, and 

 the physical basis of heredity; and Halliburton's Kirke's 

 Physiology (Murray), the latest information on Animal 

 Physiology. For Amphioxus he should refer to Willey's 

 Amphioxus and the Ancestry of Vertebrates (Macmillan). 

 For more general accounts of the Vertebrates Wiedersheim 

 and Parker's Comparative Anatomy of Vertebrates (Mac- 

 millan) will be useful. 



The volumes of the Cambridge Natural History, and 

 those of the Treatise on Zoology edited by Professor Ray 

 Lankester, supply the most recent and most detailed 

 information on the several divisions of the Animal 

 Kingdom. The former are rather more popular and less 

 severely technical, the latter contain the latest suggestions 

 and conclusions in theoretical morphology. Professor 

 Lankester's own essay on recent modifications of theoreti- 

 cal views concerning the ccelum, nephridia and ccelomic 

 ducts is specially interesting and important. The volumes 

 of the Treatise on Zoology which have hitherto appeared 

 include Minchm's account of Sporozoa, Bather's of Echmo- 

 dermata, Pelseneer's of Mollusca, Fowler's of Hydrozoa, 

 and others. 



In relation to the earthworm, Darwin's Vegetable Mould 

 and Earthworms may be mentioned, and Huxley's volume 

 on the crayfish in the International Scientific Series 

 should be read, not merely for the sake of its precise 

 scientific description, but because it exhibits so clearly 

 the importance of zoological study to general culture. 



Many of the books mentioned ought to be found on the 

 shelves of any good public library. 



