Chromosomes of the squirrel monkey (Saimiri sciureus) are identified and described by specific C and G banding patterns. Chromosomal polymorphism in Saimiri from different geographic regions is further demonstrated as due to pericentric inversion involving chromosome pairs B5 and Bll with C1 and C2.

Variables of renin‐angiotensin‐aldosterone axis with inclusion of protein binding to specific plasma globulin (ABG), plasma cortisol, and the blood pressure (BP) were measured in 24 chimpanzees, 4 gorillas, and 16 cynomolgus monkeys. ABG activity was readily detected in plasma from the primates. In chimpanzees and gorillas, all the variables under baseline conditions were similar to those in humans. In cynomolgus (Macaca fascicularis), both the ABG binding capacity for aldosterone and the diastolic or systolic BP were significantly higher (p < 0.001 and p < 0.01 respectively) than in chimpanzees and gorillas.