

614 



MONOOllArUS OF NORTH AMERICAN ItODENTIA. 



MM 





(111 the outer side, a fine ridge, which marks ofT a secondary groove within the 

 first. The same thing occurs in the einglc-groovcd species — castanops, mexi- 

 canus, and hbpidus. But this carination of the main groove is not always 

 perceptible, and is generally so fine as to be liable to be overlooked. When 

 most strongly marked, this supplementary groove is just like the inner marginal 

 groove itself; and each tooth then seems to consist of two similar halves. 



Tablk I. — McMwrementH of forty tpeclMvi»,fre»h and atoohoUc, of Geomys DunSARlcg. 



I 



1.127 

 1:1^4 



a:)3n 



351 

 SKU 



'nat 



■M33 

 1175 

 •J03O' 

 II 

 S 

 3 

 i 

 5 

 

 1 

 8 

 II 

 10 

 II 

 li 

 13 

 H 

 IS 

 16 

 11 

 18 

 19 

 31 

 33 

 34 

 33 

 3< 

 31 

 33 

 33 

 38 

 40 

 43 



Looality. 



Niobrara River .. 



KAusas 



Iowa 



do 



SAlnt LoulA, Mo. . 

 do 



do , 



Illinois 



VernillloD River ... 



LoulslaDa 



Fort Slasetna, Dak . 

 do , 



.do. 



.do. 

 .do . 

 .do. 



.do. 

 .do . 

 ..do . 

 .do. 

 .do. 



.do. 

 .do. 



.do. 



.do. 

 .do. 



.do . 



.do . 

 .do. 

 , do. 

 ..do. 



..do. 

 ..do. 

 ..do. 



do. 

 .do. 

 .do. 

 ..do. 



.do . 

 .do. 



From tip of aoBO to — 



o.es 



0.9S 

 1.13 

 I.3S 



1.03 

 1.90 

 1.00 

 0.15 

 0.S0 

 1.11 

 1.30 

 1.13 

 0.98 

 1.00 

 1.10 



am 



1.09 



1.35 

 0.94 



0.91 



a 93 



0.90 



1.10 

 1.33 



0.80 

 0.81 

 1.05 

 0.95 

 0.M 



a83 



1.13 

 1.03 

 0.93 

 0.6] 

 0.71 

 0.91 

 0.96 

 0.17 

 1.09 



1.40 

 1.63 

 1.10 

 3.10 



1.13 

 1.85 

 1.43 

 1.73 

 1.45 

 2.08 

 9.04 

 1.94 

 1.51 

 1.61 

 1.>S 

 1.60 

 1.73 

 1.84 

 1.46 

 1.46 

 1.47 

 1.35 

 1.71 

 3.13 

 1.57 

 1.33 

 1.81 

 1.56 

 1.71 

 1.50 

 1.99 

 1.63 

 1.34 

 1.13 

 1.33 

 1.47 

 1.33 

 1.19 

 1.54 



1.90 

 3.00 



3.90 

 360 

 1.90 

 3.35 



3.49 

 3.45 

 3.03 

 305 

 300 

 336 

 3.06 

 3. If. 

 3.45 

 305 

 1.97 

 L97 

 1.07 

 3.90 

 3 47 

 300 

 303 

 330 

 306 

 303 

 1.90 

 350 

 330 

 313 

 1.63 

 1.63 

 3 00 

 1.93 

 3 10 

 9.90 



6.15 

 6.30 



8.00 

 a 00 

 7.00 

 7.."i0 

 5.75 

 8.00 



n.oo 



8.00 

 9.00 

 1.90 

 7.90 

 8.50 

 6.30 



aso 



9.33 

 1.50 

 1.00 

 7.30 

 7.45 

 9.00 

 9.33 

 a 00 



aoo 



9.95 



aoo 

 a 95 



1.50 



g.oo 



7.85 

 1.13 

 6.00 

 6.60 



a 35 



1.00 



o.ne 

 a50 



Length of— 





9.30 

 .3.00 

 3.13 

 3.30 



aoo 



a 15 

 3.35 

 363 



1.15 

 3.08 



3.01 

 360 

 9.60 

 3.96 

 3 37 

 363 

 a 13 

 348 

 3 43 

 330 

 319 

 365 

 a 03 

 316 

 3 61 

 3 77 

 3 67 



aoo 



383 



an 



1.30 

 1.50 

 1.35 



1.60 

 1.30 

 1.35 

 1.50 

 1.75 

 1.90 



1.80 

 1.60 

 1.47 

 1.66 

 1.50 

 1.64 

 1.70 

 1.60 

 1.4u 

 1.55 

 1.60 

 1.89 

 1. .-8 

 1.63 

 1.60 

 1.83 

 1.6tj 

 1.69 

 1.57 

 1.16 

 1.68 

 1.55 

 1.37 

 1.35 

 1.65 

 1.04 

 1.55 

 1.89 



1.35 

 1.35 

 1.30 

 1.45 

 1.33 

 1.33 

 1.35 

 1.13 

 1.23 

 1.03 



1.37 

 1.97 

 1.03 

 1.35 

 1.90 

 1.91 

 1.30 

 1.18 

 1.14 

 1.39 

 1.21 

 1.35 

 1.40 

 1.33 

 1.91 

 1.45 

 1.21 

 1.38 

 1.18 

 1.43 

 1.33 

 1.28 

 1.14 

 1.93 

 1.33 

 1.35 

 1.96 

 1.31 



0.70 

 0.10 

 0.68 

 0.80 

 0.55 

 0.63 

 0.10 

 0.65 

 0.15 

 0.55 

 1.35 

 1.03 

 0.93 

 0.11 

 0.69 

 0.81 

 0.10 

 0.80 

 0.84 

 0.80 

 0.15 

 0.67 

 0.09 

 0.83 



o.ei 



0. 15 

 0.14 

 0.89 

 0.13 

 0. 75 

 0.60 

 n.M 

 0.81 

 0.06 

 0.47 

 0. f)7 

 0.\0 

 0.10 

 0.64 



o.r. 



Alcoholic. 



..do. 



...do. 

 Fresb. 



:..do. 

 Alcoholic. 



...do. 



...do. 

 Fi««h. 

 Alooholio. 



Freah. 



...do. 

 ...do. 

 ...do. 

 ...do. 

 ...do. 

 ....do. 

 ...do. 

 ....do. 

 ...do. 

 ...do. 

 ...do. 

 ...do. 



...do. 

 ....do. 

 ....do. 



..do. 



..do. 



...do. 



..do. 



...do. 



.. do. 



..do. 

 ...do. 



do. 



... do. 

 ...do. 

 ...do. 

 ... do. 

 ...do. 



* A typo of 6r«n'oepf. 



I Xos. 1-49 (orig noft.) wen* mpaanred In the fle«h by t'le coMt ctor, Pr. C T. McChegney, U. 3. A., whose cure In this 

 matter Rroatly increawd (lie value of au important col'ectioa of Uanimala raade by bini In the locality nanicd. " Fort Bis* 

 set4in" waa formerly Fort Wadawortb, Dakota. 



