Okamoto: Secondary Sexual Characters in Loaches.] [Philip. Journ. Sci., 19, No. 6. 
Female 
Fig. 1. Male and female loaches; the male showing a swelling, a, on posterior side of dorsal 
fin and strong pectoral fins with elongated second ray, b; X 0.75. 
Hi 
Fig. 2. Cross section of the swelling on the male loach; a, fat cells in the scale pouch; b, fatty 
tissue; c, epidermis; d, corium; e, muscular layer; X about 40. 
PLATE 1. 
