On reviewing the more prominent somatic characters of the Seri, it is found that the greater number are either functional or presumptively correlated with function, and that only a few—chiefly stature and color—are simply structural; accordingly a comparison of the peculiar somatic features and the peculiar individual habits of the tribe would seem to be instructive in more than ordinary degree. The most striking trait of the Seri is the pedestrian habit. The warriors and women and children alike are habitual rovers; their jacales and even their largest rancherias are only temporary domiciles, evidently vacant oftener than occupied; the principal rancherias are separated by a hard day’s journey or more; and none of the known rancherias or jacales of more persistent use are nearer than 4 to 10 miles from the fresh water by which their occupants are supplied. Probably the most persistently occupied rancherias of the last half century have been those located from time to time near Costa Rica, yet even these were seldom occupied by the same group for more than a fortnight or possibly a month, and were often vacated within a day or two after erection. Still more temporary camps intervene between jacales, and their sites may be seen in numbers in the neighborhood of the better-beaten paths, or along the shores, or even over the trackless spall-strewn plains; they may be merely trampled spots, sparsely strewn with oyster shells and large bones gnawed at the ends, usually in the lea of a shrub or rock; in places of small shrubbery or exceptionally abundant grass there may be two or three or perhaps half a dozen “forms” (suggesting the temporary resting places of rabbits), in which robust bodies nestled and shrugged themselves into the warm earth and under the meager vegetation. Rarely there are ashes and cinders hard by, to mark the site of a tiny fire, and more frequently battered and stained or greasy bowlders record their own use as meat-blocks or metates, though it is manifest that most of the camps were fireless and many foodless. It is particularly noteworthy that even the more temporary resting-places are seldom if ever less than a mile or two from the nearest fresh water. In short, the Seri are not a domiciliary folk, but rather homeless wanderers, customarily roving from place to place, frequently if not commonly sleeping where overtaken by exhaustion or storm, ordinarily slumbering through a part of the day and watching by night, habitually avoiding fresh waters save in hurried and stealthy visits, and apparently gathering in their flimsy huts only on special occasions.