Gophers from Salt Lake City and environs (east of the river) vary in color from almost black to dark cinnamon. Specimens from Draper, which locality is likewise east of the river, are uniformly lighter, but also vary in color. The skulls of animals from both localities are indistinguishable from each other and closely resemble those of topotypes. Specimens from the west side of the river, from Riverton, two miles west of Murray and Rose Canyon, Oquirrh Mountains, all are lighter in color than topotypes. The color varies from darkest at the north at Murray to lightest at the south at Riverton. This is exactly the reverse of what would be expected since Riverton is the locality geographically nearest to the type locality, Provo. The skulls are quite uniform and are all referable to _albicaudatus_. The Jordan River may be one factor which causes this lack of uniformity between the animals from the two sides of the river. Davis (1939:56-57) states that rivers are not barriers to movement of pocket gophers where the river completely freezes over and has the ice covered with thick snow. Although the Jordan River does occasionally freeze over, it is never frozen for more than a few days at a time, and snow in this area does not last for long periods. The material at hand indicates that the gophers from both sides of the river are referable to the same subspecies _albicaudatus_. The animals from the east side of the river are in the aggregate of characters the most typical of _albicaudatus_ of any in the entire range. Those from the west side of the river, although definitely referable to _albicaudatus_ do show some intergradation with _Thomomys bottae robustus_, the subspecies to the west. The specimens from Bauer, Tooele County, are relatively uniform in color, and are considerably lighter than topotypes of _albicaudatus_. Their upper parts vary from Sepia to Saccardo's Umber as compared with near (13''''_n_) Black of the topotypes. The sides and underparts are lighter, due primarily to much less black in the underfur. They average slightly longer in total length, but shorter in hind foot. All cranial measurements are slightly smaller than in topotypes of _albicaudatus_. The shape of the skull closely resembles that of _albicaudatus_, although the rostrum, nasals, upper incisors and posterior tongues of the premaxillae tend to be narrower. This narrowness indicates intergradation with _Thomomys bottae stansburyi_, the race nearest to the west. These animals are in the majority of characters referable to _albicaudatus_. Bauer is situated in extreme western Tooele Valley at the foot of Stockton Bar, a low pass between the Stansbury and the Oquirrh mountains. This valley lies to the west of the aforementioned Jordan River. Although these gophers are definitely referable to _albicaudatus_ they are more unlike topotypes than are the animals from Riverton.