VII. COMPARISON OF EXTERNAL CHARACTERS OP Castor canadensis phaeus HELLER, FROM ADMIRALTY ISLAND, ALASKA, WITH Castor cana&^i* heiuna* 

 TAYLOR, FROM COOK INLET REGION, ALASKA, AND WITH Castor canadensis canadensis KUHL, FROM EASTERN CANADA * ° 



Points of Comparison Castor canadensis phaeus Castor canadensis belugae Castor canadensis canadensis 



(two examples) (one example) (two examples) 



General coloration No. 210 similar in coloration to no. 4347 No. 4347 from Cook Inlet much like no. 210, Similar to phaeus but no specimen as dark 



from Cook Inlet; no. 209 much darker; somewhat paler; considerably lighter in as no. 209. 

 all the other specimens of phaeus similar coloration than the rest of the series of 

 to no. 209. phaeus. 



Dorsal overhair No. 210 with tips of dorsal overhair between No. 4347 cinnamon to ochraceous-tawny, so Hairs a mixture of blackish and ochraceous- 



cinnamon and sayal brown; no. 209 vary- definitely lighter. tawny (nos. 174525, 174526), former the 



ing about seal brown. darker; general appearance near chocolate 



or bay. 



Dorsal underfill- No. 210 benzo brown to bone brown; no. No. 4347 a slightly paler tint of benzo or Near clove brown (nos. 174525, 174526). 



209 light seal brown to benzo brown. bone brown than in no. 210. 



Overhair of sides No. 210 with dark coloration of dorsal over- No. 4347 with hair of sides approaching cin- Overhair of sides tipped with cinnamon; 



hair grading into the verona brown or namon and then grading into coloration broad area of intergradation between 



warm sepia of the ventral overhair with of the underparts which is near army chocolate or bay dorsal coloration and 



slight intermediate lightening; no. 209 brown. warm sepia ventral coloration (nos. 



cinnamon and sayal brown of dorsal over- 174525, 174526). 

 hair grading toward the verona brown of 

 the ventral overhair. 



Top of head No. 210 orange-cinnamon; no. 209 mikado No. 4347 similar to rest of upperparts, but Similar to rest of upperparts. 



brown. shade very slightly lighter, near orange- 



cinnamon. 



Sides of face Nos. 210 and 209 cream-buff grading toward No. 4347 cinnamon-buff and pinkish buff. Near pinkish cinnamon (no. 174526); near 



honey yellow cinnamon-buff or pinkish buff (no. 174525) . 



Rase of tail above No. 210 near bister, becoming paler anteri- No. 4347 between clay color and cinnamon- Cinnamon-drab to verona brown; hairs im- 



orly; no. 209 near warm sepia. buff. mediately at base of tail tipped with seal 



brown (no. 174525); chestnut to bay, 

 hairs at immediate base of tail tipped 

 with seal brown (no. 174526). 



No 210 near cinnamon-drab; no. 209 cin- No. 4347 pinkish buff mixed with a color General impression pale brownish drab (no. 



*orereet cinnamon-drab 174525); approaching warm blackish 



namon-drab to benzo brown. near cinnamon araD. n „, coc % 



brown (no. 174526). 



h M « u*« .-» >» — — ; "->• »•-? * rjo™ nE , '' '" c, ~ ar,b ana H zr« zszswzfssi 



mars brown, burnt umber or Hay's benzo brown. 174526) 



N„r W 210 rnd 2 \^ de ?ar b ying ni about ra verona No. 4347 lighter than in pnaeus, nearest Bone brown, dark grayish brown, or dusky 

 Ventral overhair Nos. 210 and 209 varying about verona ^ ^ ^^ ^ (m) 174g25); a trjfle pa]er> near 



brown and warm sepia. army u u vinaceous-drab or natal brown (no. 



brown. 



174526). 



»t ><,,n , (h <,„_. ,„„„ hair? near cinnamon- Definite throat band, the scattered lighter 



Throat band No. 210 varying about cinnamon-buff, Na 4847 w fJ™ l ™ TZT hair* being near cinnamon-buff (no. 



slightly paler dorsally, slightly darker buff; no definite throat band. ^^ ^^ ochraceous _ buff (no 



ventrally; no. 209, scarcely indicated 174526). 



pinkish buff in coloration. w,,^,, pinkish buff and cinna- Liver or carob brown approaching orange- 

 Base of tail beneath No. 210 hazel to chestnut; no. 209 varying No. 4347 between pinkish buff cljm&mm laterally and anteriorly (no. 



about verona brown, warm sepia and mon-butt. 174526); mixture of chestnut and cinna- 



mars brown. • mon-drab approaching pinkish buff lat- 

 erally and anteriorly (no. 174525). 



m„ 4S47 shaft of hair pale drab-gray, Shaft of hair pale, nearest pale gull gray, 



Ventral underfur No. 210 shaft of hair pale drab-gray term- No ^^^^ to einnamon-drab, tipped with drab-gray (nos. 174525, 



inally approaching drab, general impres- te. mina ' ? ecru-drab. 174526). 

 sion of light drab given; no. 209 similar, general impression nea 

 but general impression nearer light cin- 

 namon-drab. Narr0 wer than In phaeus. Narrower than In phaeus. 

 Tail Broader than in canadensis. miI °" 



