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FOSSIL VERTEBRATA OF NORTH AMERICA. 



MICROTIN.E. 



Alston, E. R. 1876 A, p. 85. (Arvicolinse.) 

 Baird. S. F. 1857 A, p. 506. (Arvicolinse.) 

 Blackmore, H. P. 1874 A. ( Arvicolidse. ) 

 Brandt, J. F. 1885 A. (Arvicolini.) 

 Coues, E. 1877 B, i, p. 131. (Arvicolinse.) 

 Flower, W. H. 18rf3 D, p. 419. (Arvicolinse.) 

 Flower and Lydekker 1891 A, p. 465. 

 Lataste, F., 1883, Lo Nat., ii, pp. 323, 332, 343, 347. 

 (Arvicolinse.) 



1884, Ann. Mus. Civic. Geneva, xx, p. 255. 

 (Arvicolinse.) 



Merriam, C. H. 1894 A, p. 227. (Arvicolinse.) 



Miller, G. S. 1896 A, p. 8. 



Nehring, A. 1875 A. 



Roger, 0. 18% A, p. 124. (Arvicolidae.) 



Thomas, O. 1896 A, p. 1020. 



Trouessart, E. L. 1898 A, p. 545. 



Tullberg, T. 1899 A, pp. 227, 430. (Arvicolidse.) 



Zittel, K, A. 1893 B, p. 536. (Arvicolidse.) 



ANAPTOGONIA Cope. Type A. hiatidens Cope. 

 [Arvicola (Anapto- 



Cope, E. D. 1871 I, p. 91 

 gonia).] 



1883 S, p. 373. [Arvicola (Anaptogonia).] 

 189G F, p. 379. 

 1899 A, p. 201. 

 Miller, G. S. 1896 A, p. 74. [Microtus (Anapto- 



gonia).] 

 Trouessart, E. L. 1898 A, p. 551. (Anaptogenia.) 



Anaptogonia cloacina Cope. 



Cope, E. D. 1896 A, p. 380. 

 Trouessart, E. L. 1898 A, p. 551. 

 Pleistocene; Pennsylvania. 



Anaptogonia hiatidens Cope. 



Cope, E. D. 1871 1, p. 91, fig. 18. [Arvicola (An- 



aptogonia).] 



Cope, E. D, 1899 A, p. 203. 



Allen, J. A. 1877 B, p. 947. [Arvicola (Anapto- 

 gonia).] 



Cope, E. D. 1883 S, p. 373, fig. 24, no. 18. [Arvicola 

 (Anaptogonia).] 

 1896 F, p. 379. 

 1899 A, p. 201 (A. hiatidens); p. 206 (Schis- 



todeltasulcata 1 ). 



Miller, G. S. 18% A, p. 74. [Microtus (Anapto- 

 gonia).] 



Roger, 0. 18% A, p. 125. (Arvicola.) 

 Trouessart, E. L. 1898 A, p. 551. 

 Wheatley, C. M. 1871 B. 



Pleistocene; Pennsylvania. 



SYCIUM Cope. Type S. doacinum Cope. 



| Sycium cloacinum Cope. 



Cope, E. D. 1899 A, p. 203, text figure, p. 204. 

 Pleistocene; Pennsylvania. 



MICROTUS Schrank. Type M. arvalis (Pall.). 



Schrank, F. 1798, Fauna Boica, i, p. 72. Microtus didelta Cope. 



Unless otherwise indicated, the following FArvioola fPitv 



authors refer to this genus under the name ^'^ '^\t. 9 ' g J = J ^. , ( V 



this genus 



Arvicola Lacepede, 1801. 

 Alston, E. R. 1876 A, p. 85. 

 Baird, S. F. 1857 A, p. 509. 

 Blackmore, H. P. 1874 A. 

 Cope, E. D. 1871 I, p. 87. (Isodelta, subgenus, 



type Arvicola ttpcothcn. ) 



18% F, p. 379. (Microtus.) 

 1899 A, pp. 201, 204. (Microtus.) 

 Couea, E. 1877 B, i, p. 149. 

 Flower and Lydekker 1891 A, p. 466. 

 Lydekker, R. 1885 B, p. 230. 

 Miller, G. S. 18% A, pp. 15, 44 (Microtus); p. 58 



(subgenus Pitymys). 

 Nehring, A. 1875 A. 

 Owen, R. 1868 A, p. 298. 



Parker, W. K. 1868 A, p. 208, pi. xxiv, figs. 9-13. 

 Scott, W. B. 1892 A, p. 407. 

 Thomas, O. 1896 A, p. 1021. 

 Tomes, J. 1850 A, p. 550. 

 Trouessart, E. L. 1898 A, p. 552. (Microtus.) 

 Zittel, K. A. 1893 B, p. 536. 



mys)]; p. 90 [A. (Pitymys) sigmodus]. 



Allen, J. A. 1877 B, p. 947. [Arvicola (Pitymys) 

 didelta, sigmoda.] 



Cope, E. D. 1883 S, p. 373, fig. 24, no. 15. (Arvic- 

 ola.) 



1899 A, pp. 205, 207. 



Roger, O. 18% A, p. 125. (Arvicola.) 



Trouessart, E. L. 1898 A, p. 555 [Microtus (Pity- 

 mys)]: p. 562 (M. sigmodus). 



Wheatley. C. M. 1871 B. (A. sigmodus.) 

 Pleistocene; Pennsylvania. 



Microtus diluvianus Cope. 

 Cope, E. D. 1896 F, p. 381. 



1899 A, p. 205, text figure. 



Trouessart, E. L. 1898 A, p. 561. 



Pleistocene; Pennsylvania. 



Microtus involutus Cope. 

 Cope, E. D. 1871 I, p. 89, fig. 16. [Arvicola (Pity- 

 mys).] 



1 This is regarded by Cope as possibly different from A. hiatidens. 



