478 Ischyromys, Sciuromys, Mysops, Apatemys, Dipodomys. 



741. t Ischyromys, Leidy, 1856. 



Colotaœis, Cope, 1873; Gymnoptyclms, p., Cope, 1873 (iiec 1874). 

 Lôidy, Proc. Acad. PMlad., 1856, p. 89. 



4837.|typus, Leidy — {2545); Matthew, 1. c, tOligocaen. 



1899, p. 52;' Tullberg, NagetMere, 1899, Dakota Merid., 



p. 463. Nebraska, Colorado. 



4838.f veterior, Matthew. Bull. Amer. Mus., y Olig-ocaen. infer. 



1903, p. 211. Moutana. 



742. ^t Sciuromys, Sclilosser, 1884. 

 Scblosser, Palseontogr., 1884, p. 82. 



4839.f cayluxi, Sclilosser — {2546). fOligocaen. Gallia 



Merid. 



743. t Mysops, Leidy, 1871. 

 Syllophodus, Cope, 1883. 



4840.|minimus. Leidy — {2547); Matthew, fEocaen. Wyoming. 

 Bull. Amer. Mus., 1899, p. 39. 



4841.tfraterniis, Leidy — {2548); Matthew, fEocaen. Wyoming. 

 1. c, 1899, p. 39. 



Incertae Sedis. 



744. t Apatemys, Marsh, 1872. 

 Marsh, Amer. Jouru. Soc, 1872, IV, p. 221. 



4842.tbellus, Marsh — {4113); Matthew, Bull. tEocaen. Wyoming. 



Amer. Mus., 1899, p. 39. 

 4843.tbellulus. Marsh — {4120); Matthew, fEocaen. Wyoming. 



1. c, 1899, p. 39. 



Familia XIL Heteromyidae. 

 Subfam. 1. Dipodomyinae. 



745. Dipodomys, Gray, 1841. 



Macrocolas, Wagner, 1846 ; Dlpodops, Merriam, 1890. 

 Gray, Anu. Natur. Hist., 1841, YII, p. 521. 



4844.phillipsi. Gray — {3504); {nec True.;' Mexico (Real del 



1884—85); Miller et Rehu, Proc. Bost. Monte), Vallo Mexico. 

 Se, 1901, p. 152. usque ad Guanajuato. 



haïtiens, Wagner. » 



