CASTORID A — CASTOR—CASTOR FIBER CANADENSIS. 
447 
TaBLe I.—Measurements of forty-three skulls of CASTOR FIBER var. CANADENSIS. 
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g 2 Locality. ~ a Ps 2 & | 2 2ote| A] 3 Remarks. 
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Repo REO SESS 4.50 | 3.20 | 0.90 | 1.50 | 0.80 | 1.85 | 3.00 | 0.95 | 3.85 | 1.70} Old. 
See eat aleetal 4.70 | 3.45 | 0.90 | 1.75 | 0.87 | 2.10 | 3.10 | 1.00 92 | 2.15 |.--.do. 
SS5e08 5.25 | 3.70 | 0.87 | 1.90 | 0.87 | 2.25 | 3.53 | 1.03 |.-..-.| 2.35 | Very old. 
Sore] Feceeelt (ape SOspoa et beS 5. 20 | 3.85 | 0.90 | 1.87 | 1.00 18 | 3,42 | 1.15 | 3.95 | 2.30 - do. 
sorcec Ge. [eae sesessas 5,10) || 3275, |) 0.902} --==.). 52.) 2-1 5rh 3.25) } 1 On 4s Od 12°40 I) _ - idot 
~2cecs| Bae AA Ol prcreseoeseos 4.90 | 3.60 | 0.88 | 1.75 |.0.80 | 1.97 | 3.07] -....| 4.20 | 2.37 | Old. 
eee aaa OO nee ia cin wim = 4.90 | 3.35 | 0.87 | 1.80 | 0.82 | 2.05 | 3.15 |....-.] 4.10 |......] Middle-aged. 
Se P89 tss)2-5---)5----~ 4.45 | 3.15 | 0.88 | 1.50 | 0.80 | 1.77 | 2.95 | 1.05 | 3.85 | 2.20 | Rather young. 
4.90 | 3.60 | 0.92 | 1.70 | 0.87 | 2.05 | 3.20 | 1.07 |--.--. -.-. | Middle-aged. 
4.735 | 3.35 | 0.85 | 1.65 | 0.82] 2.05 | 3.20 | 1.03 | 3.85 | 2.15 | -. do. 
5.25 | 3.50 | 0.95 | 1.72 | 0.95 | 2.15 | 3.42 | 1.10 | 3.85 | 2.15 | Very old. 
4.75 | 3.35 | 0.90 | 1.73 | 0.&5 | 2.00 | 3.10 | 1.10 | 3.80 | 2.05 | Middle-aged. 
4.85 | 3.35 | 0.85 | 1.70 | 0.85 | 2.15 | 3.25 | 0.97 | 3.62 | 210] -- do. 
4. 67 | 3.35 | 0.87 | 1.65 | 0.80 | 2.15 | 3.15 |.-.... 3.67 | 2.15 |..-.do. 
sons tlh 5 otS55e seston 4.65 | 3.18 | 0.90 | 1.62 | 0.78 | 1.90 | 3.00 | 1.00 | 3.55 | 1.90 - do. 
4.60 | 3.45 | 0.92 | 1.60 | 0.90 | 1.95 | 2.95 | 0.98 | 3.80 | 2.08 | .--do. 
5.05 | 3.50 | 0.90 | 1.78 | 0.85 | 2.20 | 3.25 ]......| 4.00 | 2.25 | Old. 
4.85 | 3.45 | 0.96 | 1.70 | 0.90 | 2.18 | 3.25 | 1.00 | 3.75 | 2.23 |....do. 
7390 --do.. - | .. | 4.50 | 3.25 | 0.88] 1.40 | 0.78 | 1.82] 2.83 | 0.97 | 3.55 | 2.05 | Middle-aged. 
706 Oxford County, Me... |... | 4.95 | 3.47 | 0.90 ae 2.17 | 3.45 | 1,028 | 3.80 | 2.23 | Old; nasals bro- 
s : ken. 
2146 |......] Upper Missouri....-. Q | 5.65 | 4.15 | 1.12 | 2.05 | 1.10 | 2,60 | 3.78 | 1.20 | 4.65 | 2.75 | Very old. 
Cet | Soe hee Gel UO RE ae ee ere -- | 5.60 | 4.00 | 1.06 | 2.10 | 1.08 | 253 | 3.83 | 1.22] 4.65 | 2.62] ...do. 
SAR jbesoe 4 Pees eet) OSS BSS Aeioee ses . | 5.35 | 4.05 | 1.00 | 2.00 | 1.00 | 2.40.] 3.53 | 1.22 | 4.40 | 2.67] .-.do. 
35) Becca Beeeee .. | 5.40 | 3.97 | 0.95 | 1.97 | 1.03 | 2.35 | 3.73 | 1.15 | 4.45 | 2.45 |...-do. 
ae neae eatey OO) cen = - t= =~ - .- | 5.10 | 3.90 | 0.95 | 1.85 | 0.90 | 2.40 | 4.50 | 1.10 | 4.30 | 2.40} Old. 
CTS es] |B CSS ee eee --.| 4.90 | 3.65 | 0.95 | 1.85 | 1.00 | 2.20 | 3.35 |....-. 3.95 | 2.40 . do. 
2 sol Aang .. | 5.10 | 3.75 | 0.94 | 2.73 | 0.82 | 220] 3.60] 1.10 | 4.10 | 2.48] .. do. 
3480 |..---.| Platte River......... ...| 5.45 | 3.75 | 1.00 | 1.90 | 0.95 | 2.37 | 3.75 |...-.. 4.20 | 2.33 | Very old. 
Bb) ol Bena Pee .-.| 5.15 | 3.83 | 1.00 | 1.85 | 0.98 | 2.15 | 3.50] 1.15 | 3.95 | 2.40 |..--do. 
‘i 2380 |...... Upper Missouri. .---. . | 4.60 | 3.45 | 0.87 | 1.60 | 0.85 | 2.05 | 3.10 | 1.00 | 2.80 | 2.15 | Middle-aged. 
3477 j..---. Platte River ......... ...| 4.40 | 3.10 | 0.95 | 1.47] 0.80 | 1,90 | 2.90 | 0.96 | 3.65 | 2.10 | Middle-aged, or 
‘ rather young. 
Cheyenne River. ..... =s 50 | 3.25 | 0.85 | 1.53 | 0.87] 1.85] 3.00 | 1.00 | 3.68 | 2.17] -..do. 
White River, Dak ... |. 4.57 | 3.37 | 0.90 | 1.60 | 0.85 | 2.00 | 3.10 | 1.00 | 3.73 | 2.15 | Rather young. 
SP RSNBSRe coe elesoe =~ =<) 4.75 | 3.42 | 0.95 | 1.80 | 0.96 | 2.00 | 3.25 | 1.00 | 4.07 2.30 | Middle - aged; 
| “weight, 35 lbs.” 
4)2 |..... Fort Hays, Kans...... 5.50 | 3.85 | 1.02 | 1.85 | 1.03 | 2.42] 3.65 | 1.10] .... | 2.35 | Old. 
8011 2] Vancouver Island -.. |... | 5.20 | 3.75 | 0.96 | 1.90 | 0.82 | 2.10] 3.45]... | 4.35 | 2.30] ...do. 
« flee2od |.-----| Oregon ....-...-....- .. | 4.80 | 3.35 | 0.98 | 1.75 | 0.82 | 2.10] 3.28 | 1.00} 3.20 | 2.15 | Middle-aged. 
Santa Clara, Cal ..... ..]} 5.00 | 3.38] 0.95 | 1.85] 0.85 | 2.20 | 3.30 | 1.07 | 4.03 | 2-32] ...do. 
Franklin County, Miss 5.30 | 3.95 | 1.00] 1.97] 0 95 | 2.30 | 3.45 | 1.12 | 4.20 | 2.48] Very old. 
Mississippi -.-. ..-.-.]... | 4.70 | 3.35 | 0.96 | 1.75 | 0.85 | 2.15 | 3.17] 1.05 | 3.90 | 2.22 Middle-aged. 
. -| Rio Grande, Tex....-. .. | 5.25 | 3.80 | 0.85 | 1.90 | 0.97 | 2.35 | 3.63 | 1.15 | 4.32 | 2.65 | Very old. 
Matamoras, Mexico ...|... | 5.15 | 3.80 | 1.00 | 1.75 | 0.97 | 2.25 | 3.65 | 1.20 | 4.15 | 2.45 ..do. 
cece! te-tecl (ESR eee sereeses =.) 5.25 | 3.95 | 1.12] 1.75] 0.98 | 222 | 3.55 | 1.20 )..-..-|..... tee cs 
Sec sace | Seat 5.50 |..----| 1.92 | 209] 1.00 | 2.50] 3.75 | 1.20 | 4.15 |......] Very old; vari- 
ety fiber. 
------] iulver Elbe, Germany.|.... 5.00 | 3.30 | 1.00 | 2.01 | 0.90 | 2.00 | 220] 1.10] 3.80 | 205 | Rather young; 
variety fiber. 
* From the occipital condyles to front border of the intermaxillaries 
