LIST OF SPECIES. 
1.3 
I’agu. 
30. CASTOKOIDES, Foster. 363 
U5,»{Jastoroides ohioensis, Foster,—Fossil Beaver.—Northern Ohio, New York and 
Michigan. 363 
31. GEOMYS, Eafinesque. 368 
116. — < 3 reomys bursarius, Kich.—Pouched or Pocket Gopher.—Missouri to Minnesota 
and Nebraska. 372 
117. — Geomys breviceps, Baird, (n. s.)—Short-Headed Gopher.—Louisiana to Middle 
or Western Texas. 378 
118. — Geomys pinetis, Eafinesque.—Salamander.—Georgia and Florida. (Alabama, 
Aud. & Bach.). 380 
119. — Geomys clarkii, Baird, (n. s.)—Pecos Gopher.—Pecos Eiver, Texas. 383 
120. — Geomys castauops, Leconte.—Chestnut-Faced Gopher.—Bent’s Fort, Upper 
Arkansas Eiver. 384 
Note.—T he two following Mexican species are referred to— 
Geomys hispidus, Leconte.—Mexico_____ 386 
Geomys mexicanus, Leconte.—Mexico_ 387 
32. THOMOMYS, Maxim. 388 
» 
121. — Thomomys bulbivorus. —California Gopher.—Coast of California, from Tejon 
valley to Petaluma. 389 
122. — ^Thomomys laticeps, Baird, (n. s.)—Broad-Headed Gopher.—Humholt Bay ,Cal.. 392 
123. — ^Thomomys douglassii, Giehel.—Oregon Gopher.—Columbia Eiver and Puget’s 
Sound to the Dalles. 394 
124. Thomomys borealis. —Upper Columbia Eiver? Canoe Creek, Cal. (East of Cascade 
mountains.). 396 
125. — Thomomys mfescens, Maxim.—Fort Union Gopher.—Fort Pierre to Fort Union, 
on the Missouri. 39*7 
126. — ^Thomomys umbrinus. —Sonora Gopher.—Cimarron Eiver, N. M., west to the 
Eocky Mountains, and south into Sonora. 399 
127. — Thomomys fiilvus. —San Francisco mountains, N. M., to Fort Yuma and San 
Diego. 402 
33. DIPODOMYS, Gray. 406 
128. — Dipodomys ordii, Woodhouse.—Kangaroo Eat.—Platte Eiver, along the eastern 
slope of the Eocky Mountains, into Durango and Coahuila, Mexico.,.. 410 
129. — Dipodomys phillipii, Gray.—Jumping Eat.—Los Angeles, Cal., to Fort Walla- 
Walla, 0. T., on the Columbia. 412 
