756 SYSTEMATIC LIST OF ILLUSTRATIONS. 
Perognathus monticola, Baird:—Skull, Plate LI, fig. 3. 
Jlavus, Baird.-~-Animal, Plate VIII, fig. 2. Details, Plate XXI, fig. 3. 
DIPODINAE. 
Jaculus hudsonius.—Details, Plate XX, fig.-5. 
MURINAE. 
Mus tectorum, Savi.—Skull, Plate LIT, fig. 6. 
Reithrodon montanus, Baird.—Teeth, Plate LIV, No. 1306. 
Hesperomys texanus, Woodhouse.—-Animal, Plate VIII, fig. 1. Skull, Plate LI, fig. 5. 
boylit, Baird.— Animal, Plate VIII, fig. 3. Skull, Plate LI, fig. 3. 
palustris, Wagner.—Skull, Plate LII, fig. 4. 
Neotoma floridana, Say. and Ord.—Skull, Plate LI, fig. 2. 
mexicana, Baird.— Teeth, Plate LIV, No. and No. 1674. 
Juscipes, Cooper.—Skull, Plate LILI, fig. 1. Teeth, Plate LIV, No. 936. 
occidentalis, Cooper.—Animal, Plate IX, fig. 2. Details, Plate XXI, fig. 4. 
Skull, Plate LIII, fig. 3. 
cinerea.—Skull, Plate LIII, fig. 5. Teeth, Plate LIV, No. 1694. 
magister, Baird.—Lower jaw, Plate LILI, fig. 4. 
Sigmodon berlandieri, Baird.—Skull, Plate LIII, figs. 6-7. 
ARVICOLINAE. 
Arvicola townsendii, Bachman.—Teeth, Plate LIV, No. 1595. 
montana, Peale.—Details, Plate XXI, fig. 2. 
austera, Lec.—Teeth, Plate LIV, No. 1587. 
cinnamonea, Baird.—Teeth, Plate LIV, No. 1714. 
pinetorum, Leconte.—Teeth, Plate LIV, No. 1719. 
Fiber zibethicus, Cuv.—Teeth, Plate LIV, No. 626. 
HYSTRICINAE. 
Erethizon dorsatus.—Upper view of skull, Plate LV, fig. 3. 
epixanihus, Brandt.—Skull, Plate LV, figs. 1-2. 
LEPORINAE. 
Lepus glacialis, Leach.—Skull, Plate LVI, fig. 1. 
washingtonii, Baird.—-Animal, Plate XV. 
campestris, Bach.—Skull, Plate LVI, fig. 2. 
callotis, Wagler.—Skull, Plate LVII, fig. 1. 
californicus, Gray.—Skull, Plate LVII, fig. 2. 
sylvaticus, Bach.—Skull, Plate LVIII, fig. 1. 
audubonii, Baird.—Animal, Plate XIII. Skull, Plate LVIII, fig. 2. 
trowbridgii, Baird.—Animal, Plate XIV. 
aquaticus, Bach._—Skull, Plate LIX, fig. 1. 
palustris, Bach.—Skull, Plate LIX, fig. 2. 
