FOREWORD TO THE SECOND EDITION 



Fran my observations of Japanese agricultural science and related biological 

 sciences in the post-war years of 19U5-U6 and 19uS-h9, I soon found that the 

 work in both plant and animal cytology was one of the really bright spots in 

 Japanese science today. While the progress in cytology in Japan during World 

 War II was quite independent of that in most other countries, it had nevertheless 

 kept apace with or even surpassed the contributions of other nations in many 

 important aspects. 



One of the really fine contributions of Japan to world knowledge has been 

 the meticulous research work on animal chromosomes by Dr. Sajiro Makino and his 

 staff in the Zoological Institute of Hokkaido University. Dp. Makino has 

 devoted at least 20 years of his life to this specialized field of cytology. On 

 many occasions during my sojourn in Japan, my colleagues had called attention 

 to this excellent research. 



All cytological research in post-war Japan has been seriously handicapped by 

 a dearth of foreign cytological and closely related literature, shortages of 

 chemicals, and inadequate research budgets. Dr. Makino has risen above these 

 almost insurmountable obstacles to continue his r; search and publish what is 

 perhaps the most complete list of chromosome numbers in animals that has appeared 

 in the world to date. He has listed about 3200 species of the invertebrates and 

 vertebrates. »hat is probably equally remarkable is the fact that Dr. Makino has 

 personally investigated Ihh species on this list. This experience has made hin 

 unusually well qaalified to appraise the work of others in tnis field. 



This chromosome list is one of several on which Dr. Makino has appeared as 



472 3? 



(vii) 



