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 'ill' 

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178 



MONOGKAPH8 OF NORTH AMERICAN RODENTIA. 



Tablk XLVI. — itea»urementt of uMij-figM ukulU of Mtlem and teetlerH tpetime»» of AnvicOLA KIPARIUI — 



Coutinned. 



I 



a 



W 



mi 



me 

 mi 



Looallty. 



Kacino, Wig 



HfllDt Loutrt, Uo 



do 



do 



PrAfrle Iftr Rouge, Lii. 



do 



Montorpy.Gal 



do 



Putalumo, Cal 



Sftn Diego, Cal 



Upper Pit River. Cal.. 



Luat River, Cal 



Fort Trjon, Cal 



California 



DeaChntoa, Oreg 



Puget Soand, Oreg 



1.03 

 1.01 

 1.04 

 1.03 

 1.10 



1.00 

 l.U 

 I.U 

 1.10 

 1.08 

 1.01 

 l.OS 

 1.14 

 1.07 

 1.19 



0.40 

 0.43 

 0.39 

 0.40 

 0.43 



0.40 

 fl.41 

 0.44 

 0.4S 



a 43 

 0.49 

 a 43 

 0.40 

 0.43 



Widtliat- 



N 



0.S8 

 0.69 

 0.60 

 0.96 

 0.67 



aoo 

 a 01 



0.69 



0.60 

 0.64 

 0.61 

 0.63 

 0.63 

 COS 

 0.63 

 0.09 



0.16 

 0.17 

 0.18 

 0.18 

 0.18 

 0.16 

 0.19 



a 19 



0.10 



a 14 



0.17 

 0.19 

 0.U 

 0.14 

 0.10 

 0.19 

 0.18 



0.36 

 a 96 

 0.27 

 0.99 

 0.97 

 0.95 

 0.97 

 0.99 

 0.30 

 0.30 

 0.30 

 0.97 

 0.97 

 0.39 

 0.38 

 0.99 

 a97 



Under Jaw from 

 tip of ioclaora to— 



0.91 

 0.18 

 a 34 

 0.30 

 0.33 

 0.30 

 0.39 

 a 17 



a 18 

 a93 



0.90 

 0.99 

 0.33 

 0.33 

 0.33 

 0.30 



I a9i 



0.60 

 0.61 



aoo 



0.98 

 0.64 



0.69 

 0.66 

 0.B7 

 0.64 

 0.63 

 0.61 

 0.68 

 0.60 



0.78 

 a78 

 0.80 

 0.74 

 0.80 

 0.76 

 0.80 



O.tU 

 0.81 

 0.80 

 0.83 

 0.80 

 0.79 

 0.81 

 0.80 

 0.81 



J! 



s.- 



0.89 

 0.f» 

 0.8J 

 0.77 

 0.83 

 0.79 

 81 



0.84 

 0.89 

 0.89 

 0.84 

 0.87 

 0.8U 



0.84 

 0.83 



a 37 

 0.37 

 0.97 

 a99 

 0.97 

 0.99 

 0.S7 



0.39 

 0.30 

 9R 

 0.39 

 0.33 

 0.31 

 0.97 

 0.99 

 030 



& 



B 



9.31 

 0.31 



ass 



0.33 

 0.34 

 0.30 

 0.33 



o.s:i 



0.39 

 0.30 

 0.38 

 0.37 

 0.36 

 a39 

 0.33 

 0.39 



Reniarka. 



wontanM t 

 edax. 



idax. 

 tong'roatrit. 



oondmfaiia 



The blanks in the foregoing table are owing to the defective condition 

 of' certain specimens. The measurement of the length is made from tiie tip 

 of the nasal bones to the upper border of the foramen magnum. The height 

 is the perpendicular from the posterior corner of the last upper molar. The 

 orbital width is at the point of greatest constriction of the orbit. The zygo- 

 matic width is at the broadest point of the zygomatic arches. The molar 

 seres are measured from anterior corner of the first molar to posterior corner 

 of the last one. The length of incisors is their protrusion from the alveoli. 

 The condyloid dimension is measured to the back corner of the condyle. 



The average length of the whole series is 1.08; the minimum* is 1.00 

 and the maximum 1.20, the latter occurring in one of the "breweri" speci- 

 mens. The variation is, therefore, 0.20, or about 20 per cent, of the mean. 

 The average zygomatic width is 0.64; the maximum 0.69; the minimum 

 0.55. The proportion of length to width is, therefore, as l.OH to 0.64, 

 or as 1.00 : 0.59. The molar series in both jaws is about the same, and 

 averages a little over 0.25 of an inch (from 0.24 to 0.30) ; the upper incisors 

 protrude about 0.20 on an average (from 0.17 to 0.24) ; the under are rather 



Uble. 



'Of aduH «peof inoua : aoverol youDg sknila, rnnging from 0.80 tu 1.00, are exolndcd fh>iu the 



