_Locality._--West of the Red River, 200 miles from Nacogdoches. Name only known. Enumerated in the Mithridates. NAVAOSOS(?). Of the Navaosos, I only know that they are said to be a branch of the Lipans. If so, and if also they are _Navahos_, we are enabled to fix the Lipans as Paduca. They are extinct in Texas. MAYES. _Locality._--St. Bernard's Bay. Name only known. Enumerated in the Mithridates. CANCES. _Locality._--Ditto, ditto. TONCAHUAS. The Toncahuas, or Tonkeways, are mentioned by Kennedy as being, like the Lipans, the hereditary enemies of the Cumanches, and as retreating before them from the hunting grounds of the upper country. On the other hand, I find that Mr. Bollaert makes them an offset of the Cumanches. In 1845 they numbered about 300 souls. TUHUKTUKIS (TAHOOKATUKES). The Tuhuktukis are members of the Cherokee confederacy; within, but not considered indigenous to, Texas. UNATAQUAS. _Synonym._--Anadarcos. The Unataquas are members of the Cherokee confederacy; within, but not indigenous to, Texas. MASCOVIE. IAWANIS (_Ionis_). Each of these divisions (of which the value is unascertained) are members of the Cherokee confederacy. WICO(?)[132] _Locality.-_-Head waters of the upper Red River, conterminous with the Kioways and Cumanch. AVOYELLES. WASHITAS. _Original Locality._--West of the Mississippi. Extinct or incorporated. KETCHIES. XARAMENES. CAICACHES. Extinct. BIDIAS. _Locality._--Middle part of Trinity River. _Numbers._--In 1845, ten families only. A MS. of Mr. Bollaert's, and the work of Kennedy, on Texas, have been the chief authorities for the previous. The notes of interrogation show the extent to which it may be amended. _Data_ for doing this are probably more abundant in America than here. For the whole area between the three oceans--(Arctic, Pacific, and Atlantic)--and the break formed by the Paducas, the chief groups have now been enumerated--perhaps exhaustively, or nearly so. Not, however, finally. Although the details of even the wider groups have been so numerous as to make the present notice of them _classificational_ rather than _descriptive_, there are still a certain series of facts which, from having a significance beyond that of their mere occurrence, require notice. Whatever has an important bearing upon the following two great problems comes under this category-- 1. The unity or non-unity of the American populations, one amongst another. 2. The unity or non-unity of the American populations as compared with those of the Old World. 1. The unity or non-unity of the American populations one amongst another--a short history of the different opinions upon this point will give two things at once--_a_, the history itself, and, _b_, the chief facts by which changes in it were brought about.