LKPORIDiB— LEPU8 TROWBBIDOEI. 



345 



The variations in size in Lfpux troxehridgei ore well indicated in the 

 Ruhjoined tables of mcasuiemeiits of (he skullti and external dimensions. The 

 extremes in a scries uf ten skulls ure: length, 2.28 and 2.55; width, 1.15 and 

 1.32; nasol hones (length), 0.90 and 1.17; lower jaw (length), 1.42 and 1.73. 

 The length of the ear varies in diflerent specimens from 2.28 to 3.05, the 

 av(;rnge being about 2.50 to 2.75. In specimens from the most southern 

 localities, the ear averages considerably longer than in those from the north- 

 ward, although the size of the animal, as indicated by measurements of the 

 skull, is smaller at the southwanl. Thus the average length of four skulls 

 from localiticF near San Francisco is 2..^jO and the breadth 1.28; while the 

 average length of the skull in four specimens from Cape Saint Ludas is 2.29, 

 and of the breadth 1.17. 



The habitat of Ltpus trowhridgei, as indicated by the specimens in the 

 present collection, seems to be restricted to the region east of the Cascade 

 range of mountains, and to extend along the coast from Fort Crook to Cape 

 Saint Lucas. 



Lepus trowhridgei was first described by Professor Baird in 1855, and 

 redescribed by him under the same name in 1857, by which appellation it 

 has fortunately been always known. Very few original references have been 

 made to the species aside from those in the various reports of the Pacific 

 Railroad surveys and explorations. 



Tablb XLII.— Jlf«Miimii«tt(< o/ L. trowdridori. 



310 



ail 



318 



nil 



*S8S 



LocnlUy. 



Sui maotaoo or lloiiteray, C«l 

 do 



1183 



vn 

 isao 

 isn 



3S3II 



San Ftmooliico, Cul . . 

 do 



do 



do 



Bodrg*. Ctl 



SuiM Cl*n, Ciil . 



PdUIiiiiui, €■! 



do 



SuDltca, Cal... 



do 



do 



Fort Ti-Jon, C»l . 



From Up of iitinH to— 



l.« 

 i.as 

 l.M 

 l.«l 

 i.a 



l.M 

 1.90 

 1.93 



LM 

 1.41 



I.3S 



8.98 

 3.49 

 9.08 

 S.W 

 8.15 



8.10 

 8. US 

 8<W 



9.93 

 8. 4.1 



869 

 9.8.^ 



9.68 

 8.90 

 9.8S 

 9.80 

 .85 



9l1S 

 9.19 

 3L03 

 3.90 

 9L98 

 889 

 810 

 8.00 

 8.98 



13.00 

 1111 

 11.00 

 19.30 

 111 9.-1 



13.15 

 14.00 

 14.90 

 l.t.00 



10.99 

 19.00 

 19.00 



Tail to end 

 of- 



Leugth of— 



0.49 

 0.90 

 0.49 



0.90 



aio 



I 



1.86 

 084 



i.eo 



l.Bri 

 1.90 



1.39 

 1.45 



1.90 

 1.50 

 1.59 



1.90 

 1.40 



8. 19 I 9. 3S 



9.08 I 



9.15 853 

 9.15 9.55 



865 

 9.80 

 9.89 



9.30 

 9.69 

 'X98 

 9.63 

 9.18 

 868 



J., 



■ Speelnona ttma Mnaeum of ComparatlTo ZoSlogj:. Cambridga, Man 



I 9.10 

 3.00 

 3.05 

 8,50 



Remarka 



From Baird. 

 .. do. 

 .. di>. 



From a aklD. 

 From a ipeclmou iu 



aloulwl. 

 ...do. 



From a akiu. 



...do. 



...da 



. do 



.. do. 



.. du. 



..do. 



...do. 



