SMITHSONIAN MISCELLANEOUS COLLECTIONS 



VOL. 61, NO. 1, PL. 23 



FIGS. 1 & 2.-CERATOTHERIUM SIMUM COTTON I ; MALE 

 FIGS. 3 & 4. — CERATOTH ERIUM SIMUM COTTONI ; FEMALE 

 SHOWING AGE AND SEXUAL DIFFERENCES IN DEVELOPMENT OF THE NASAL BOSS 



