Page:The Osteology of the Reptiles.pdf/52

34 genera, the supratemporals and tabulars in a few others. Teeth may occur on the coronoids. The postsplenial occurs in but one known genus [Pantylus], as also the intertemporal [Seymouria]. The interparietals are reduced and posteriorly placed in a few, and in the latest genera may be vestigial. The lacrimal in Procolophon is small, not reaching the nares. The teeth are usually conical throughout; in some genera they are obtuse and cuspidate; in the Diadectidae the posterior ones are transversely molariform; in no known forms are they sectorial. Doubtless with future discoveries other modifications of the primitive structure will be found.