REPTILIA: LIMNOSCELIS 25 



was in close articulation, it lay upon its ventral side, slightly de- 

 pressed by its own weight in fossilization, and a little skewed to the 

 right. As collected, it was broken in eight or ten pieces, the bone 

 so firm that it permits the matrix to be removed very completely, 

 which has been done by the skilful head preparator of the Yale 

 Museum, Mr. Hugh Gibbs; not quite completely yet, the anterior 

 palatal region being still invisible. Since the mandibles are clearly 

 in natural relations with each other, save for the slight twisting, 

 and the upper part of the skull is undisturbed, the obliquity has 

 been corrected in the drawings — a matter of no difficulty. In a 

 future paper a restoration of the skeleton will be given. Some 

 facts of interest, especially the number and shape of the mandibular 

 and maxillary teeth, were made out from the separated pieces be- 

 fore they were cemented together, characters which will again 

 become visible when the preparation of the skull is completed. 

 The surface of the skull is almost smooth with feeble indications of 

 small pits. 



The skull of Limnoscelis is remarkable among terrestrial rep- 

 tiles for its elongated form and highly developed incisor teeth. 

 The upper surface is nearly in one plane from the margin of the 

 occiput to near the extremity of the rostrum, somewhat convex 

 above in front of the eyes, and the parietal region is moderately 

 convex on the sides. Fortunately the sutures of the skull nearly 

 everywhere are quite distinct, even visible in the photograph as 

 serrated or zig-zag lines. A few cracks are present, but they 

 are not confusing save in a few cases, but those are in the most 

 important part of the skull, the posterior temporal and occipital 

 region. The sides of the skull, with the mandibles in place, are 

 of nearly uniform height, that at the nostrils being quite what 

 it is at the temporal region, unless there has been a slight depres- 

 sion in the latter place. From just in front of the orbits the skull 

 widens very rapidly, the orbits themselves being nearly wholly 

 concealed in top view by the overhanging roof of the skull. In 

 front of the orbits there is a rather deep depression on each side. 

 Back of the orbits there seems to have been a nearly vertical wall 

 for some distance, and then convex bioadly outward. The nares 

 are of considerable size, oval in shape, and situated close to the 



