Materials

Abstract

The preparation of this atlas is based on the brains of five adult male marmosets, Callithrix jacchus. Additionally 14 skulls were used to determine the range of variation of some stereotaxic coordinates, the measuring points of which are given in Figures 1 and 2. Only two of these skulls are known to be from female marmosets. As far as this limited number allows, no differences are recognizable between males and females with regard to the skull dimensions and proportions. This statement is supported also by further data on brain and body weights taken from animals of our collection and from the literature (e.g., Bauchot and Stephan, 1969). The average body weight of 26 adult males was found to be 281 g, the average brain weight of 17 males 7512 mg. The respective values of females are 279 g (N=11) and 7644 mg (N=8). Correspondingly, both sexes have an average body weight close to 280 g and a brain weight close to 7.6 g, and, therefore, we believe that the given details and coordinates are valid for males and females.