PLATE XLI. 



PAGE. 



Fig. I. Ptyonitis peettnatus. Natural size 377 



2. Ptyonius nummifer. Xatiiral size 374 



3. Ptyonius mimmifer, without iiead. Katiiral size 374 



4. Ceraterpeton punctolineati'/m. The rifflit posterior angle of the cranium preserved 372 



To the right hand are two pectoral shields of a large specimen. 



5. Sauropleura Newberriana. Posterior part of cranium with dentition, and loose abdominal 



scutella : 404 



