Figure 2 shows a in Hormonal Regulation of Testicular Development in the Finless Porpoise Neophocaena asiaeorientalis sunameri: Preliminary Evidence from Testicular Histology and Immunohistochemistry

Figure 2 shows a longitudinal slice of a tooth consisting of translucent and opaque zones under the transmitted light. The tooth is clearly divided into two parts by a highlighted neonatal line. The part inside of the neonatal line is dentine, and the outside is cementum. Ages were counted by GLGs in dentine, and basic data are shown in table 1. The oldest individual was 13 years old, while the youngest ones died about a month after birth.