﻿PLATE IL 



[Enlarged two and one-half times.] 



Fig. 1. Bony palate of Phenacomys. Salmon River Mountains, Idaho. 

 (No. 31219, U. S. Nat.Mus.) 



2. Bon}^ palate of Microtus (Lagurtis) palHdus, Reese River, Nevada. 



(No. 32498, U. S. Nat. Mus.) 



3. Bony palate of ilficro/Ms {Pitymys) }nnetorum. Washington, D. C. 



(No. 30332, U. S. Nat. Mus.) 



4. Bony palate of Microtus (Alticola) hlanfordi. Nultar Valley, Kashmir. 



(British Museum Register, 81. 3. 1. 23.) 



5. Bony palate of Microtus {Microtus) arvalis. Geneva, Switzerland. 



(British Museum Register, 79. 9. 25. 52.) 



6. Bony palate of Microtus (Lagurus) lagurus. Guijeff, Russia. 



(No. 3619, collection of Gerrit S. Miller, jr.) 



7. Bony palate of Microtus {Arvicola) arvicoloides. Type. Lake Kichelos, 



Washington. 



(No. 1358, collection of S. N. Rhoads.) 



8. ^ouj '^2b\&te oi Microtus {Anteliomys) cMnensis. Type. Western Sze-chuen, 



China. 



(British Museum Register.) 



9. Bony palate of Microtus ( Neofiber) alleni. Florida. 



(No. 23452, U. S. Nat. Mus.) 



10. Bonj -pahite of Evotomys glareolus. Christiania, Norway. 



(British Museum Register, 84. 10. 31. 11.) 



10. View perpendicular to plain of paLHe. 



10a. View from below and behind at strong angle with plain of 

 palate. 



11. Bonj -palsite of Microtus (Eothenomys) melanogaster. Western Fokien, China. 



(British Museum Register, 92. 10. 12. 52.) 



12. Bony palate of Dicrostonyx torquatus. Petschora, Russia. 



(No. 3621, collection of Gerrit S. Miller, jr.) 



13. Bony palate of Fiber. Lake George, New York. 



(No. 67689, U. S. Nat. Mus.) 



14. Bony palate of Lemmus lemmus. Vola. (From St. Petersburg Museum. ^ 



(No. 3620, collection of Gerrit S. Miller, jr.) 

 14. View perpendicular to plain of palate. 



14a. View from below and behind at strong angle with plain of 

 palate. 



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