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. (jlacialis, Leach, /. c. 170, 1819; Audub. N. A. Q. t. 32; 

 Baird, N. A. M. 577, t. 56. f. 1 (skull) ; Waterh. Gl. 102. L. 

 timidus, 0. Fab.) 



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 Washingtonii, Baird, 1855, N. A. M. 583, t. 15. 



25. Lepus campesfris, 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. (L. nigri- 

 caudata, Bennett. L. flavigularis, Wagner. L. texianus, Wa- 

 terh. Gl. 136.) Sonora. 



27. XejoMSca/z/oraicMS, Gray,Mag.N.H.1837,p.586; Waterh. 

 Gl. 171 ; Audub. N. A. Q. t. 112 ; Baird, N. A. M. t. 57. f. 1 

 (skull). (L. Richardsonii, Bachm. ? L. Bennetti, Gray, Voy. 

 Sulph. t. 14.) California. B.M. 



28. tLepus lungicaudatus, 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 Audubonii, Baird, N. A. M. 608, t. 13, 58. f. 2 

 (skull). Coast of California. 



30. Lepus Troubridgii, Baird, N. A. M. 610, 1. 14. California. 



5. Tapeti. 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. Tail none. Ears short. 



1. Tapeti brasiliensis. {Lepus brasiliensis, Linn. L. tapeti, 

 Pallas.) Para and Bolivia. B.M. 



B. Rabbits. Skull : the hinder nasal aperture narroto, deep, an- 

 gular, contracted above, with sloping sides. Living in burrows; 

 young born blind and naked. 



6. CuNicuLUS. Lepus § C, Baird, N. A. M. 575. Skull : 



