Plate XXXIV 



Comparative Series: Caudal Vertebrti:' 



All figures natural size. Figs. 1-5, dorsal aspect; figs. 6-10, ventral aspect. 



1 and 6. Lemur mongoz. Amer. Mus. No. 22886. 



2 and 7. Notharctus osborni. Amer. Mus. No. 11474. Caudals 1 (?)-4(?), 7(?), 10(?), 12(?)-17(?). Prepared and restored by 

 Mr. Albert Thomson. 



Vertebrae 12(?)-17(?), so far as preserved, are similar to tliose of Lemur mongoz, but apparently shorter. 



3 and 8. Notharctus tyrannus. Amer. Mus. No. 11478. Caudals 5(?), 9(?), 12(?)-19(?). Prepared and partly restored by Mr. 

 Albert Thomson. 



Caudals 12(?), 15(?) are the only ones in which the length is known. If correctly numbered, they appear to indicate that the caudals 

 in this species were somewhat shorter and stouter than those of N. osborni. Caudals 16(?)-19(?) as restored are probably too short. 



4 and 9. Cebus apiculatus. Amer. Mus. No. 30200. 



5 and 10. Macacus sp. Amer. Mus. No. 41999. 



