
This book presents an account of whatis known or what is postulated about the life, and the subsequent evolution ofthe mainanimals groups. Certain basic scientific facts are included but themajority of the content consist of hypothesis which are never likely to beexperimentally verified; and the reader should treat the book as a source offacts, ideas and theories on which thought and discussion can be based. The bookclaims to be a complete, thorough and authentic exposition of thetopics dealt with and emphasis has been laid on introducing basic as well as modernconcepts.
| fred aminzadeh johanna hurwitz hershel raff k a hamid irfani john r weisz | ashok k banker debashis sarkar jacqueline williams hines n a jelley u a bakshi a p godse |