PREFACE V 



tions. Others have given information and indicated where important facts could 

 be learned. 



The authors hope that the new book will come up to the expectations of those 

 who have aided in its preparation. If this is accomplished, we will feel that we 

 have made a worthwhile contribution to the literature on marine products. 



Donald K. Tressler 

 James McW. Lemon 

 October 1950 



