The vertebral column is represented by little more than a mold of the form of the vertebræ, so that little can be said of its character. The individual vertebræ are short and hour-glass-shaped. The ribs are borne intercentrally, as in all the microsaurians which have been studied from the Linton deposits. The ribs are rather long and somewhat heavy, slightly curved and expanded at the proximal end, as though an incipient bicipital condition were present. The right clavicle, which is preserved as an impression, is entire. Its impression shows this element to have been ornamented on its ventral surface with radiating grooves and ridges which started at the lower angle of the bone. The element is distinctly triangular, which is characteristic of the genus _Tuditanus_, so far as known. The fragment of the left clavicle adds nothing to our knowledge of the element. The left humerus recalls in a striking way that of _Tuditanus longipes_ Cope, and it was once entertained as a possibility that the present form might be a member of that species, since the skull is lacking in _T. longipes_. Sufficient specific differences were found, however, in the ribs, which, in _T. longipes_, are very long, slightly curved, and delicate, but which, in the present form, are comparatively heavy. Other characters sufficiently diagnostic are found in the form assumed by the vertebræ in the two forms. Measurements of the Type of Tuditanus walcotti Moodie. mm. Length of specimen 70 Length of skull 20 Posterior width of skull 14 Width of skull, anterior to orbits 10 Length of orbit 4 Width of orbit 2 Interorbital width 3 Length of clavicle 9 Greatest width of clavicle 4 Length of vertebral column, as preserved 50 Length of a vertebra 1.75 Width of a vertebra 50 Width of body impression 15 Length of humerus 6 Median width of humerus 50 Width at end of humerus 2 Length of rib 8 Width of rib 25 The above-described specimen was collected by Mr. R. D. Lacoe, of Pittston, Pennsylvania, from Linton, Ohio. A second individual (No. 4481, U. S. National Museum) of this species is indicated by a rather poorly preserved specimen on a slab of soft coal from the Linton mines. The following portions of the animal have been detected and will be discussed: partial impression of the skull, with a fragment of a minute jaw, in which are minute teeth; right clavicle; part of the impression of the body; nearly entire left hind limb; impressions of about a dozen vertebræ, very indistinct.