150 



SIXTH REPORT 1836. 



of prey, and above all by man and his attendant dog. In the 

 order rudentia we have an example of productiveness being 

 sufficient to ensure the species from extinction, though assailed 

 by hosts of foes of all kinds. 



Only one didelphis is common to North America, namely, 

 the virginiana, which extends to the Canada lakes, being, 

 moreover, like the rest of the genus, an inhabitant of the inter- 

 tropical parts of the continent. Mr. Collie saw it in California, 

 and Temminck says it inhabits Mexico. Didel2)his cancrivora 

 and opossum range, according to Lichtenstein, as far north as 

 Mexico, and if one of these be not the " coyopollin" of Her- 

 nandez, there is a fourth species in that country. Authors have 

 somewhat arbitrarily used the name of coyopollin as a synonym 

 of dorsigera and p/)i lander ; but it is by no means certain that 

 the latter species reaches Mexico. 



Ord. RODENTIA. 



Sciurus cinereus, Buff. 10, 25. 



„ capistratus, Griff. Cvv.pl. 



„ ? fframmums, Say, Long. Exp. 



„ niger, Rich. F.B.A. 



,, CoUixi, Id. Beech. App. 1. 



„ Clarkii, Smith, Griff. Cim.pl. 



„ Lewisii, Id. I.e. pi. 



„ hudsonius. Rich. F.B.J. 17. 

 Tamias Lysteri, Id. F.B.A. 15. 

 • „ quadrmttatus, Id. F.B.A. 16. 



„ iuecatus, Licht. Deppe's List. 

 Pteromys sabrinus, Rich. F.B.A. 



„ alpinus, Id. I.e. 18. 



„ voliicella. Buff. 10, 21. 

 Spermophilus lateralis. Rich. F.B.A. 13. 



„ Hoodii, Id. I.e. 14. 



„ Richardsonii, Id. I.e. 11. 



„ Franklinii, Id. I.e. 12. 



„ Beeclieyi, Id. I.e. 12 B. 



„ Douglasii, Id. I.e. 



„ Parryii, Id. I.e. 10. 



„ guttaUis ? Id. I. e. 



„ spilosus, Benn. Zool. Pr., 1833. 



„ ? Ludovicianus, Griff. Cuv. 

 Arctomys empetra, Rich. F.B.A. 9. 



„ } brachyurus, Harlan, yauwtf. 



„ ^ pruinosus, Penn. 



„ < ealigatus, Eschsch. Zool. At. 6. 



„ yochanagamis, King, Narr. S{e. 



„ monax, Edw. 104, Griff. Cuv. 

 Mus leucopus, Raf. Rich. F.B.A. 



„ .' virginiciis, Reich. Fisch. Sgn. 

 Meriones labradorius. Rich. F.B.A. 1 7. 

 Neotoma Dnimmondii, Rich. F.B.A. 8. 



„ floridana. Say & Ord. Ae. Sc, 

 Ph. 



Sigmodon hispidiun. Say. 



„ ferrugineum, Harl. Sill. Jour. 

 Fiber zibethicus, Cuv. 

 Anicola riparius, Ord. 



„ xanthognathus. Leach. Zool. M. 



„ pennsylvauicus, Rich. F.B.A. 



„ noveboracensis, Id. I.e. 



„ borealis, Id. /. e. 



„ rubricattis, Id. Beeeh. App. 

 Mgnomes prateyisis, Raf. An. Nat. 1820. 

 Georychus helvolus. Rich. F.B.A. 



„ trimucronatus. Id. I.e. 



„ hudsonius. Id. I.e. 



„ groenlandicus, Id. I.e. 

 Geornys bursaiius, Davies, Liti. Tr. 5, 8. 



„ borealis. Rich. nov. sp. 



„ Douglasii, Id. F.B.A. 



„ bulbivorus. Id. I.e. (diplostoma). 



„ umbrinus. Id. I.e. 



„ talpoides. Id. I.e. 



„ pinetis, Raf. 



„ Drummondii, Rich. nov. sp. 



„ mexicanus, Licht. Herx. 

 Saccomys anthophilus, F. Cuv. 



„ Jaseiaf us, JiAF. {Cricetns). 

 Apluodontia leporlna. Rich. F.B.A. 18 C. 

 Castor fiber* ?, L. 



Eretizon dorsatiun. Griff. Cuv. pl. 

 Synetheres prehensilis, F. Cuv. 

 Lepus glacialis. Leach. 



„ americanus, Gmel. 



„ virginianus, Harl. 



„ mexicantis, Licht. 



„ cunicularius, Id. 

 Lagomys princeps. Rich. F.B.A. 19. 

 Dasyproeta carolinensis, F. Cuv. 



North America exceeds the other quarters of the world in the 



