XL 
LIST OF SPECIES. 
Page. 
30. CASTOROIDES, Foster. 363 
115. —Castoroides ohioensis, Foster.—Fossil Beaver.—Northern Ohio, New York and 
Michigan... 363 
31. GEOMYS, Eafinesque. 368 
116. —Geomys bursarius, Rich.—Pouched or Pocket Gopher.—Missouri to Minnesota 
and Nebraska. 372 
117. —Ceomys breviceps, Baird, (n. s.)—Short-Headed Gopher.—Louisiana to Middle 
or Western Texas.'.. 378 
118. —Geomys pinetis, Rafinesque.—Salamander.—Georgia and Florida. (Alabama, 
Aud. & Bach.).... 380 
119. —Geomys clarkii, Baird, (n. s.)—Pecos Gopher.—Pecos River, Texas. 383 
120. — Geomys castanops, Leconte. — Chestnut-Faced Gopher.—Bent’s Fort, Upper 
Arkansas River. 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.—Humbolt Bay ,Cal.. 392 
123. —Thomomys douglassii, Giebel.—Oregon Gopher.—Columbia River and Puget’s 
Sound to the Dalles. 394 
124. —Thomomys borealis.—Upper Columbia River? Canoe Creek, Cal. (East of Cascade 
mountains.). 396 
125. —Thomomys rufescens, Maxim.—Fort Union Gopher.—Fort Pierre to Fort Union, 
' on the Missouri. 397 
126. —Thomomys umbrinus.—Sonora Gopher.—Cimarron River, N. M., west to the 
Rocky Mountains, and south into Sonora. 399 
127. —Thomomys fulvus*—San Francisco mountains, N. M., to Fort Yuma and San 
Diego. 402 
33. DIPODOMYS, Gray. 406 
128. —Dipodomys ordii, Woodhouse.—Kangaroo Rat.—Platte River, along the eastern 
slope of the Rocky Mountains, into Durango and Coahuila, Mexico.... 410 
129. —Dipodomys phillipii, Gray.—Jumping Rat.—Los Angeles, Cal., to Fort Walla- 
Walla, O. T., on the Columbia. 412 
