

Mil 



LIST OF PLATES. 



Plate XXXIII, {continued.) 



Fig. 6. b. Molar teeth of the upper jaw. 



7. a. Skull of Mus yiasutus. 

 7. b. Molar teeth of upper jaw. 



7. c. ditto of lower jaw. 



8 . a. Skull of Mus Galapagoensis. 

 8. b. Molar teeth of upper jaw. 

 8. c. ditto of lower jaw. 



XXXIV. Skulls and molar teeth of various species 



of Rodents, &c. 

 Fig. 1. a. Skull of Mus longicauclatus — natu- 

 ral size. 

 1. b. Molar teeth of upper jaw of ditto. 

 1 . c. ditto of lower jaw. 



1. d. 



2. a. 





Ramus of lower jaw — natural size. 

 Skull of Mus elegans — natural size. 



2. b. Molar teeth of upper jaw. 



2. c. ditto of lower jaw. 



3. a. Skull of M us bimaculatus — nat.size 

 3. b. Molar teeth of upper jaw. 



3. c. ditto of lower jaw. 



3. d. Ramus of lower jaw — natural size. 



4. «. Skull of Mas gracilipes. 

 4. b. Molar teeth of upper jaw. 

 4. c. ditto of lower jaw. 



4. d. View of the under side of the tarsus 



5. a. First and second molar teeth of 



upper jaw of Mus Jiavescens . 



5. b. Two posterior molar teeth of the 



lower jaw of ditto. 



6. a. Molar teeth of the upper jaw of 



Mus Magellanicus. 



6. b. ditto of lower jaw. 



7. a. Skull of Mas arenicola. 



b. Molar teeth of upper jaw. 



7. c. ditto of lower jaw. 



7. d. Ramus of lower jaw. 



8. a. Molar teeth of upper jaw of Mus 



brachiotis. 



8. b. Two posterior molars of lower jaw. 



9. a. Molar teeth of upper jaw of Mas 



obscurus. 

 9. b. ditto of lower jaw. 



10. a. Ramus of low T er jaw oiMusnasutus. 



11. a. Molar teeth of lower jaw of Mus 



tumidus. 



15. a 



Plate XXXIV, (continued,) 



Fig. 12. a. Ramus of lower jaw of Mus Bra- 



ziliensis. 

 13. a. Molar teeth of upper jaw of Mus 



micropus. 



13. b. ditto of lower jaw. 



14. a. Ramus of lower jaw of Mus Gala- 



pagoensis. 



Molar teeth of upper jaw of Mus 

 griseo-flavus . 



15. b. ditto of lower. 



16. a. Molar teeth of upper jaw of Mus 



xanthopygus, 



16. b. ditto of lower jaw. 



17. a. Molar teeth of upper jaw of Mas 



Dancinii. 



17. b. ditto of low T er. 



18. a. Molar teeth of upper jaw of Mus 



Gouldii. 



18. b. ditto of lower. 



19. a. Molar teeth of upper jaw of Mus 



insularis. 



19. b. ditto of lower jaw. 



19. c. Portion of ramus of lower jaw. 



20. a. Skull of Reithrodon chinchillo'ides 



natural size. 



20. b. ditto, viewed from beneath. 



20. c. ditto, side view. 



20. d. Ramus of lower jaw — natural size. 



20. e. Molar teeth of upper jaw. 



20. /. ditto of lower. 



21. a. Skull of Reithrodon cuniculo'ides , 



viewed from beneath. 



21. b. ditto, side view of fore part. 



21. c. Ramus of lower pair. 



22. a. Hinder part of ramus of lower jaw 



of A brocoma Bennettii. 



23. a. Skull of A brocoma Cuvieri, viewed 



from beneath. 



23. b. Low T er jaw of ditto, viewed from 



beneath. 



23. c. Ramus of lower jaw, inner side. 



24. a. Ramus of lower jaw of Octodon 



Cumingii, inner side. 



25. a. Skull of Didelphis crassicaudata . 

 25. b. ditto, viewed from beneath. 



» 



