English: On the. Morphoiogical Dissimilarity of Ayu in the Circumstantial Difference, Sex and Scale's Circuli, and the Discrimination of “Pond-cultured Ayu” and “Natural Ayu”
Japanese: 環境・性別及び鱗層に依る鮎の形態的特徴の差異竝びに天然鮎と養殖鮎の識別に就て