A. TEKAO : 



Yatsu, who all helped me in various ways during the course of my studies. 

 I am also greatly indebted to Mr. K. Nakazawa of the Fisheries Institute, 

 who also took much interest in the study of S. pi ciicnsilis, for kindly 

 placing some of his material at my disposal. Further, my thanks are due 

 to Dr. T. Ogata of the Pathological Institute, Tokyo Imperial University, 

 for giving me fascilities in the use of a freezing microtome in his laboratory. 



