GREGORY: NOTHAIUTUS, AN AMERICAN EOCENE PRIMATE 



9. Trcx'hk'a 



10. Olccranal Fossii 



11. Spirallx- Warped Siirrat-e on Shaft, 



for attaflunciit of l>rachialis an- 

 tic'iis iimsclc 



12 Vertically Extended Eminence, for 

 the attachment of tlie tendon of 

 the teres major on tlie inner side 

 of the shaft opposite th<' deltti- 



lo. pectoral crest 



Lesser Tnheroslty as seen from 

 abo\e 



14. Bicipital Groove 



Noihaictus 



Xot i,'roo\'ed 



Very shallow 

 ( 'onsjjicuons 



1 )ireetei| inwai'd 



Shallow, wide 



liifhn>p()l(l Aprs (tiiil Man 



.Alore or less deeply -r.M.Ned witi 

 prominent external and internal lips 

 \'ery <leep 

 Inconspicnous 



rncnnspicuous 



Tnrned sliarply I'oi'w ,- 

 Narrow, deep 



