1916] 



Taylor: Beavers of Western North America 



449 



o o 

 5" 3 ; 



° ° K i 



en Cr5 -t> 



-1 



p o o 



31 q= O 



2 o g 



<-► 3 pj 

 •3 p X 

 O .— — 



3'« » 



* 3 O! 



2 M "■ 



B P? 



» 3 P 

 " O. W 



p g 3 



c * 3 



O — m 

 3* f^ CD 



£ ■ C E, 



3° 3 



m O ° 



Oi te w ta cr>cocowooajco5* 



en oo m h oj oo oo oc fli ffi co §.*> 



^ OO M CC cO*lMOl»M*ffiC 



+o +o o* o* +oOK)OiO*o>Oi ai 



_ ^ ^ _. m^^^^h- 



>^".3 to i-* to t-» >-'t-'H-*h-'Ooer> 



5. 2> ???? • » H ?■ P r> !* Basilar length of Hensel 



3° 



0£ WJ-OTOC *- tO bO fO tO p CB z ,[ wi( j th 



^"3 ^ en -J to w rf^ -J oi K> w ^ 



QUO. 



p 3 



*** CD •] C4 A 9! Ol O) CJ Ol O) ffl fl 



g p o to o> en pa w en to to M to Mastoid width 



cog 



p 5 to to to to to to to to to to to 



33 m w en o) oi w p> » |^ m h Interorbital constriction 



55' c-J- to en -J >u in bi Oi O) en It> M 



P i» 



™ <" en CT £ £ 2o**j.J.« Length of nasals 



2£ b^b S SUSSES (Seffig.C) 



|| 



-" to to to to m to m to to w m 



flj m oo en o> o> w^cnpiwMp Width of nasals 



X to I : x r. >£> -J to H O M Oi to 



a> o 



3 ■'< 

 = 3 



P o 



3 ' 



O W 





&T3 





H-> tD O 



Maxillary tooth-] 



3 B 



corf^ui^ cn oi as ui w ci pi Length of fronto- 



oo <n co oo o en o *p* -q o >-» maxillary suturet 



o to S h^ to o o £ £ co co Vertical diameter of foramen 



i-t c© "to to to ot m co to o M magnum. (See fig. E) 



£ £ 5 ^ SKSS5SS Transverse width of 



tobiiocn (» m to b w w J* foramen masrnum 



£ S o S 5<r>coSc£>cooo Greatest length of mandible; angle 



m ° en *. *. oo '-a h -q ^ w to anterior surface alveolus of 



w en ^ ^ bo w b b rf* w h incisor. (See fig. D) 



g g 2 £ SSSSSSS Ventral surface of mandible 



to co ^i en H-*rf*coco'tocnos to coronoid 



g w tjto to to bo fco to w bo Ratio width of nasala 



co 'en to ^a to en w to m b bo lo basilar length 



^ S 05 en (s « ffi a -i m en Ratio maxillary tooth-row 



coocn^-3 lg lq ji b h to ^i to basilar length 



M oo <o co o o « p O to ^ Ratio vertical diameter of foramen 



ococooi en 'ku b b to h to magnum to basilar length 



