244 MAMMALS OF PENNSYLVANIA AND NEW JERSEY. 



Numerous bones. Durham Cave, near Riegelsville, Bucks Co., Penna. See 

 list (antea} of recent Neotoma. 



1 88 1. Genus Anaptogonia Cope, Proc. Amer. Philos. Soc., p. 91. 



Anaptogonia hiatidens (Cope). Great Anaptogon Vole. 



1871. Arvicola hiatidens Cope, Proc. Amer. Philos. Soc., xii, p. 91. 



1896. Anaptogonia hiatidens Cope, Proc. Acad. Nat. Sci., Phila., p. 379. 



Type locality, Port Kennedy, 1. c. Type in Amer. Mus. Nat. Hist., N. 

 York.? 



Pleistocene. Port Kennedy, Montgomery Co., Penna. Lower molars. 

 This vole is twice the size of the meadow mouse. 



1899. Genus Sycium Cope, Jour. Acad. Nat. Sci., Phila., vol. xi, pt. 2, p. 203. 



Sycium cloacinum (Cope). Cope's Sycium Vole. 



1896. Anaptogonia cloacina Cope, Proc. Acad. Nat. Sci., Phila., p. 380. 



1899. Sycium cloacinum Cope, Journ. Acad. Nat. Sci., Phila. (2), vol. xi, 

 pt. ii, p. 203. 



Type locality. Port Kennedy, 1. c. Type No. 147, Mus. A. N. S. 



Pleistocene. Port Kennedy, Montgomery County, Penna. Molars (4) of 

 2 individuals. Size about the same as A. hiatidens, supra. 



Microtus pennsylvanicus (Ord). Wilson's Meadow Vole. 



1889. Arvicola riparius Leidy, Ann. Rep. Penn. Geol. Surv., 1887, p. 6. 

 Pleistocene. Hartman's Cave, near Stroudsburg, Monroe Co., Penna. 

 Two mandibular rami, etc. See list (antea) for reference to recent Microtus. 



Microtus diluvianus Cope. Great Diluvian Vole. 



1896. Microtus diluvianus Cope, Proc. Acad. Nat. Sci., Phila., p. 381. 

 Type locality. Port Kennedy, 1. c. Type No. 144, Mus. A. N. S. 

 Pleistocene. Port Kennedy, Montgomery Co., Penna. Molars. This vole 

 is apparently larger than any existing Microtus. 



Microtus speothen (Cope). Isodeltan Fossil Vole. 



1871. Arvicola speothen Cope, Proc. Amer. Philos. Soc., vol. xii, p. 87, 



fig- 13- 



1871. Arvicola tetradelta Cope, Proc. Amer. Philos. Soc., vol. xii, p. 88, 

 fig. 14. 



1896. Microtus speothen Cope, Proc. Acad. Nat. Sci., Phila., p. 383. 



Type locality. Port Kennedy, 1. c. Type in Amer. Mus. N. Hist., N. Y.? 



Pleistocene. Port Kennedy, Montgomery Co., Penna. Left mandibular 



