224  Dr.J.E.Gray on the Skulls of Hares and Picas. 
American. 
. + Hind feet considerably longer than the head. | 
* Changing colour in winter ; postorbital widely divergent. 
22. Lepus arcticus, Leach, Ross’s Voy. Append. 2. 151, 1819. 
(L. glacialis, Leach, J. c. 170, 1819; Audub. N. A. Q. t. 32; 
Baird, N. A. M. 577, t. 56. f. 1 (skull); Waterh. Gl. 102. L. 
timidus, O. Fab.) 3 
23. Lepus americanus, Erxl., Waterh. Gl. 108 ; Baird, N. A.M. 
579. (L. hudsonius, Pallas. L. nanus, Schreb. L. virginianus, 
Harlan. L. borealis, Schinz.) B.M. 
24. Lepus Washington, Baird, 1855, N. A. M. 583, t. 15. 
25. Lepus campestris, Bachm., Baird, N. A. M. 585, t. 56. f. 2 
(skull) ; Waterh. Gl. 127. (L. Townsendii, Bachm., Aud. N. A. 
Q.t.3. L. virginianus, Rich.) Prairie Hare. Missouri River, 
Columbia. 
** Not changing colour in winter ; postorbital diverging, but in 
contact behind. 
26. Lepus caltotis, Wagner, 1830; Baird, N. A. M. 590, t. 57. 
f. 2 (skull); Audub. N. A. Q. t. 63; Waterh. Gl. 138. (LZ. nigri- 
caudata, Bennett. L. flavigularis, Wagner. L. texianus, Wa- 
terh. Gl. 186.) Sonora. 
27. Lepus californicus, Gray, Mag. N. H.1837, p.586; Waterh. 
GI. 171; Audub. N. A. Q. t.112; Baird, N. A. M. t. 57. f. 1 
(skull). (ZL. Richardsonii, Bachm.? L. Bennetti, Gray, Voy. 
Sulph. t.14.) California. B.M. 
28. ?Lepus longicaudatus, Gray, Mag. N. H. 1836, p. 586. 
Magellan’s Straits. 
tt} Hind feet apparently shorter than the head ; postorbital process 
scarcely in contact with the cranium behind ; ears as long as 
or longer than the head. 
29. Lepus Audubon, Baird, N. A. M. 608, t. 13, 58. f. 2 
(skull). Coast of California. 
30. Lepus Troubridgii, Baird, N. A. M. 610, t. 14. California. 
5. Tapreti. Skull like Lepus, but the hinder supraorbital notch 
narrow, the lobes short, with a sharp inner edge; the front of the 
lower edge of the zygoma dilated, sharp-edged, porous above; 
hinder nasal opening rather narrower. ‘ail none. Ears short. 
1. Tapett brasiliensis. (Lepus brasiliensis, Linn. LL. tapeti, 
Pallas.) Para and Bolivia. B.M. 
B. Rassirs. Skull; the hinder nasal aperture narrow, deep, an- 
gular, contracted above, with sloping sides. Living in burrows ; 
young born blind and naked, 
6. Cunicutus.. Lepus §C, Baird, N. A. M. 575, Skull: 
