l6 SMITHSONIAN IMlSfKl.l.ANF.OUS COM .KATldNS VOL. <)-' 



All tiutv iTporls in which ihc hours were separated as to sex (Von 

 Torek, Evangoli-Traniond, Pearson and Uell) indicate that tlie fossa 

 is more common in the males than in the temales. 



As to side, the only two reports, hotli of IVarson and Hell, are 

 contradictory. 



Nl'W ()1^S1-'K\ A riONS ON Till' I'O.^SA 



My own interest in the hypotrochanteric fossa was not fnlly aronsed 

 nntil 1 examined a series of adolescent human femora. The fossa m 

 these appearcil. oddly enough, not only more common and heltcr de- 

 veloped than in the femora of adults, hut in some of the speci- 

 mens it amounted to a truly major feature, all of which called for 

 further study. l^M-tunatelv T could draw on the now um-ivaled col- 

 lections oi hones, holh adult and juvenile, in my own division and was 

 able to supplement these later, thanks to the kindness of Gerrit S. 

 Miller. |r.. and I'rof. T. Wingate Todd and his associates, by the 

 invaluable anthropoid collections in the division of mammals, I'nited 

 States National Museum, and in the department of anatomy. Western 

 Reserve University, in Cleveland. The nuiuber of specimens ex- 

 amined was as follows : 



Moti-rial E.vaiiii)icd in the rrcsoit Stiidv 



No. of 

 femora 



No. of 

 femora juvenile Adult 



Lemurs : Anthroiioids : 



Juvenile -J Gorillas 00 77 



Adult 14 Giiiupauzees .... 50 ()6 



New World monkeys : Orangs ^j 42 



.1 uvenile " Gibbons ■:: ^^5 



Adult 4-' 



Old World monkeys : 



Juvenile 20 



Adult 47 



No. of 

 Ihiman: I'ctal to iutaul : femor.i 



U. S. Wliites (^iniseellancous) 161 



U. S. Negroes (miseellancous) 20j 



Child-adoleseent-sulKidult : 



U. S. Whites (, miscellaneous') 26 



U. S. Negroes (, miscellaneous 1 uxi 



Old Egyptians ( XII Dynasty ) 135 



Old Peruvians (Pachacamac and Cliicama'l 114 



N. A. Indians (miscellaneous) 62b 



Eskimos (Alaskan) ; 224 



