One male, no. 8564, Nat. Mus. Canada, from Max Lake, Turtle Mountain, Manitoba, presents puzzling characters. The external measurements of 465, 170, and 57, are in keeping with the great length of the skull which has a basilar length of 48.8. The tooth-rows are 19.3 in length and the mastoid breadth, 25.4. The relative narrowness indicated by the mastoid breadth is maintained throughout the skull. The only other specimens relating to the Turtle Mountains that have been seen are two male, skins without measurements or corresponding skulls, nos. 38902 and 38903, Amer. Mus. Nat. Hist., labeled as from either "Stump Lake or Turtle Mts.," North Dakota. One of these, no. 38902, is much darker than the other. Possibly it is from the Turtle Mountains and the other, lighter-colored one, is from Stump Lake. Study of additional specimens from the Turtle Mountains might show the existence there of a distinct race. Four specimens, in the collection of Myron Swenk, from Inland, Clay County, Nebraska, are instructive as showing how intergradation occurs between _primulina_ and _longicauda_. A subadult male, no. 10, is intermediate in external measurements and in color but in each instance is nearer _primulina_. The same is true of the least width of the color of the underparts. The color of the underparts extends uninterruptedly over the hind legs to the toes as in _longicauda_, but is absent from the underside of the tail as in _primulina_. In the skull, the basilar length, breadth of bulla, and size of teeth are nearer _longicauda_, as are also the ratios to the basilar length of the length of tooth-rows, breadth of the rostrum, length of the tympanic bulla, and depth of the braincase at the anterior margin of the basioccipital. Ratios to the basilar length of the interorbital breadth, mastoid breadth, zygomatic breadth, and depth of the skull at the posterior borders of the upper molars are nearer to those of _primulina_. The relatively long rostrum, as represented by the orbitonasal length, is nearest to that of _spadix_. A young, almost subadult, female, no. 7, agrees with _primulina_ in color, color pattern, and length of hind foot. The other external measurements are intermediate, but nearer those of _primulina_. Size of skull and teeth are as in _longicauda_. Relative proportions of parts of the skull are not diagnostic in specimens as young as this female. An adult female, skull only, no. 8, agrees with, or approaches nearer to, _longicauda_ in size of skull and teeth and in relative proportion of every part studied. A juvenile, skull only, of questionable sex, no. 9, provides no diagnostic characters. On the basis of color, these specimens from Inland are distinctly nearer _primulina_. On the basis of cranial characters they are distinctly nearer _longicauda_. External measurements are intermediate and are a little nearer those of _primulina_. By placing the most weight on the cranial characters, the animals may be referred to _longicauda_. The