PLATE LX. 



Fig. 1. — Amia scutafa. Typical si^ecimeu, natural size; from the Amyzon shales of South Park, Colo- 

 rado. Page 745. 

 Fig. 2.- — Jmi/zoii metUah: Second speciraeu from the Aiuyzou shales, 20 miles north of Osino, Nevada; 



natural size. Page 749. 

 Figs. 3-21. — Bones of LaceriUia and Ophidia, from the White River beds of Northeastern Colorado. 

 Figs. 3-11. — Peltosaurus granulosus. Typical specimen, natural size, escei^t figs. 5,6, and 11, which are 



twice natural size. Page 773. 

 Fig. 3. — Cranium restored in outline, showing superior faces of parietal, frontal, premaslllary, maxil- 

 lary, and malar bones. 

 Fig. 4. — Inferior side of frontal bone. 



Fig. 5.— Maxillary teeth, from below, twice natural size ; a, end of the same. 

 Fig. C. — Eight maudil)ular ramus, lacking the posterior third, inner view; o, internal view ; /<, snpe- . 



rior view, showing edges of crowns of teeth of distal part of dentary bone, twice natural size. 

 Fig. 7. — Left mandibular ramus, inner side. 

 Fig. 8. — Anterior vertebra, from behind. 



Fig. 9. — Dorsal vertebra, side view ; a, inferioi-, I, anterior, and c, posterior views. 

 Figs. 10, 11. — Dermal scuta of the body ; the smooth ones are seen from below. 

 Figs. 12-14. — Eiosiinus serratiis, twice natural size. Page 776. 

 Fig. 12. — Frontal bone from above ; a, from below , h, anterior view. 

 Fig. 13. — Post-frontal bone, external face. 

 Fig. 14. — Ramus of mandible with teeth, internal view. 

 Fig. 1.5. — Acdprion fonnosiim. Ramus of mandible, twice natural size, inner view; a, external side. 



Page 776. 

 Fig. 16. — Cremastosaurus carinicolHs. Anterior five vertebrie, including axis, twice natural .size, from 



above; a, from below ; 6, posterior view. Page 781. 

 Fig. 17. — Plati/rhacliis coloradoens's. Type; vertebra; seen from above twice natural size; a, the left 



side; 6, posterior view. Page 778. 

 Fig. 18. — Plafi/rliachh rhambastes. Dor.sal vertebne of two individuals, twice natural size ; right side of 



one individual; n, inferior side of the same; i, posterior view of the same; c, anterior view of 



another. Page 779. 

 Fig. 19. — Plati/rhacliis rinipeclaUs, Sacral vertebra, anterior view; a, sui^erior view, the neural arch 



being absent ; i, inferior view. Page 779. 

 Fig. 20. — Diaciumsesquipedale. Sacral vertebra, from above ; the posterior part of the neural arch broken 



away ; a, anterior ; fc, lateral, and c, inferior views. Page 777. 

 Fig. 21.— Aphelojjliis tal2)ivvrus. TyiJical specimen ; three dorsal vertebra?, left side ; a, inferior side ; b, 



anterior view ; c, posterior view. Page 782. 



