FIG. 17. _Sylvilagus floridanus mearnsi_, 4 mi. NE Lawrence, Douglas Co., Kansas. No. 3774 KU, ♂. FIG. 18. _Sylvilagus a. aquaticus_, Crawford Co., Kansas. No. 8544 KU. ♂. FIG. 19. _Sylvilagus cunicularius cunicularius_, 3 km. W Acultzingo, Veracruz. No. 30749 KU, ♂. [Illustration: FIGS. 20-24. Ventral views of skulls of rabbits. All × 1. Different views of the first four of these skulls are shown in figs. 10-13.] FIG. 20. _Romerolagus diazi._ FIG. 21. _Sylvilagus idahoensis._ FIG. 22. _Sylvilagus brasiliensis truei._ FIG. 23. _Sylvilagus bachmani macrorhinus._ FIG. 24. _Sylvilagus palustris palustris_, Society Hill, South Carolina. No. 2089 USNM (after Lyon, 1904: pl. 76, fig. 6). [Illustration: FIGS. 25-29. Ventral views of skulls of rabbits. All × 1. Different views of these skulls are shown in figs. 15-19.] FIG. 25. _Sylvilagus nuttallii grangeri._ FIG. 26. _Sylvilagus audubonii minor._ FIG. 27. _Sylvilagus floridanus mearnsi._ FIG. 28. _Sylvilagus aquaticus aquaticus._ FIG. 29. _Sylvilagus cunicularius cunicularius._ [Illustration: FIGS. 30-34. Lateral views of skulls of rabbits. All × 1. Different views of these skulls are shown in figs. 10-15.] FIG. 30. _Romerolagus diazi._ FIG. 31. _Sylvilagus idahoensis._ FIG. 32. _Sylvilagus brasiliensis truei._ FIG. 33. _Sylvilagus bachmani macrorhinus._ FIG. 34. _Sylvilagus nuttallii grangeri._ [Illustration: FIGS. 35-38. Lateral views of skulls of rabbits. All × 1. Different views of these skulls are shown in figs. 16-19.] FIG. 35. _Sylvilagus audubonii minor._ FIG. 36. _Sylvilagus floridanus mearnsi._ FIG. 37. _Sylvilagus aquaticus aquaticus._ FIG. 38. _Sylvilagus cunicularius cunicularius._ =Sylvilagus floridanus= Florida Cottontail Total length, 375-463; tail, 39-65; hind foot, 87-104; ear from notch (dry), 49-68; upper parts brownish or grayish; underside of tail white; skull with transversely thick posterior extension of supraorbital process of frontal. The geographic range is the largest of all of the North American species of the genus _Sylvilagus_; from Canada the species occurs south at least to Costa Rica and it may occur in Panamá for the species is recorded also from South America.