Invertebrate Zoology. Harley Jones. Vati 

 Cleave. 1931. xiv - 282 pp. McGraw-Hill Book 

 Company. 



In writing and revising this textbook of in- 

 vertebrate zoology the author has successfully 

 avoided the mistake of writing for the sake of 

 impressing his colleagues in the field. In the re- 

 vision, stress has been taken from the taxonomic 

 organization originally employed, while general 

 material has been introduced such as was former- 

 ly found in textbooks of general zoology. The 

 index reveals one brief reference to the entoderm ; 

 the ectoderm is referred to the same page while 

 the mesoderm has a paragraph on the following 

 page. Nematocysts are called exclusively "net- 

 tling" cells ; cnidoblasts are not mentioned : neith- 

 er for that matter is the coelom given a place in 

 the index although it is mentioned at different 

 places in the text. The echinoderms are dis- 

 cussed between the Molluscoidea and the Mol- 

 lusca, and one finds scarcely a hint of the pos- 

 sibility of constructing a diphyletic organization 

 of the animal kingdom. This text must have 

 been found useful, otherwise a second edition 

 would not have been called for, and a hasty sm - 

 vev indicates that the revised book is an improve- 

 ment. — W. C. Allee. 



reviewed in ♦'Collecting Net" 



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