The impression of the skull is distinct only in a favorable light, and even then the boundaries of the cranium are a little uncertain. For this reason no representation of the form will be attempted. The sculpturing on the parietals is, however, distinct enough to show relationship with the previously described specimen, and the form of the body impression, the absence of abdominal scutes, the shape of the clavicle and its sculpture, and the proportions of the hind limbs all agree with the characters which have been assigned to the genus _Tuditanus_. The fragment of the jaw is interesting as giving the first information as to the character of the mandible in the genus _Tuditanus_. It is very slender and of uniform width as far as preserved. The teeth are short, blunt cones, apparently pleurodont. The clavicle is of the typical _Tuditanus_ form, with the sculpturing lines radiating out from the angle. The impression of the body adds nothing to that already described for the type specimen. The nearly entire hind limb is of great interest as adding another example of the phalangeal formula. The foot is almost perfectly preserved, and the formula was probably 2-2-3-3-2. The endochondrium of the limb bones is not highly developed. About a dozen vertebræ are represented by molds in the soft coal, but nothing of their structure can be determined. The sharp, reptile-like claws in which the toes end (fig. 21, B) recall those of _Eosauravus_ and of _Tuditanus minimus_ Moodie. It is another link in the chain of the suggested relationship between the microsaurians and the early reptiles. Measurements of the Second Specimen of Tuditanus walcotti Moodie. mm. Length of entire body impression 75 Width across belly, maximum 16 Length of skull ?17 Posterior width of skull ?14 Length of fragment of jaw 4 Width of fragment of jaw 1.5 Length of tooth in jaw .25 Length of clavicle 8 Width of clavicle, maximum 4 Length of hind limb 22 Length of femur 8 Length of tibia (?) 6 Length of metatarsal 2 Length of first digit 6 =Genus ERPETOSAURUS Moodie, 1909.= Moodie, Bull. Amer. Mus. Nat. Hist., XXVI, p. 348, fig. 1, 1909. Moodie, Proc. U. S. Nat. Mus., 37, p. 21, 1909. Type: _Erpetosaurus radiatus_ Cope. Skull stout, elements sculptured with radiating grooves, ridges, and pits; orbits large and usually placed far forward; occiput sometimes with posterior table; skull more or less rounded; lateral-line canals consisting of supraorbital, suborbital, jugal, and temporal canals, the last two uniting to form a circular canal in one species; clavicle triangular, sculptured like the skull.