CHARACTERS OF THE SOUTH AMERICAN MONKEYS. Ill 



Text-figure 13= 



1 ii'I 





;^^^8 



External Generative Organs of males, 



A. Rear end, with tail raised, oi Sapale jacchus. 



B. Tip of penis of the same. 



C. Naked area round penis of the same. 



D. Side view of extended penis of the same. 



E. Tip of penis of Leontocebus rosalia. 



F. Side view of extended penis of the same. 



G. Lower view of extended penis of Saimiris. 



H. Side view of same with bristle passed through urethra. 



J. Lower view of scrotum and extended penis of Cehus. 



K. Side view of extended penis of Ateles. 



L. Side view of tip of penis of Ateles (another specimen). 



M. Tip of the same. 



N. Tip of penis of Cebus. 



a., anus ; i., ischial prominence ; s., scrotum ; o., orifice of iieuis. 



