The Coal Measures Amphibia of North America

by Roy Lee Moodie

Fig. 22.

A. Outline of skull and cranial elements of Erpetosaurus minutus Moodie, from the Cannelton slates of Pennsylvania. Original in U. S. National Museum. × 2. fr, frontal; mx, maxilla; par, parietal; po, postorbital; pp, postparietal; pr, postfrontal; sq, squamosal; spt, supratemporal; tab, tabulare.

B. Outline of skull and cranial elements of Erpetosaurus radiatus Cope, from the Coal Measures of Linton, Ohio; partially restored. × 0.75. Original in American Museum of Natural History, fr, frontal; j, jugal; mx, maxilla; n, nasal; or, orbit; par, parietal; pf, postfrontal; po, postorbital; pr, pref rental; pp, postparietal; pmx, premaxilla; qj, quadratojugal; sq, squamosal; spt, supratemporal; tab, tabulare.

C. Palate of Erpetosaurus (tabulatus?), from the Coal Measures of Linton, Ohio. × 1. American Museum of Natural History, ex, exoccipital; m, mandible; mx, maxilla; pal, palatine; pt, pterygoid; prv, prevomer; pd, parasphenoid; x, anterior and posterior palatine vacuities.

D. Outline of skull and cranial elements of Erpetosaurus acutirostris Moodie, from the Coal Measures of Linton, Ohio. Original in American Museum of Natural History. × 1. ex, exoccipital; fr, frontal; j, jugal; mx, maxilla; n, nasal; or, orbit; po, postorbital; par, parietal; pp, postparietal; pf, postfrontal; sq, squamosal; spt, supratemporal; tab, tabulare.

E. Outline of larger part of skeleton of Odonterpeton triangularis Moodie, from the Coal Measures of Linton, Ohio. Original in U. S. National Museum. × 4. h, humerus; il, ilium?; v, vertebræ, all of which are not represented.

F. Right mandible of Erpetosaurus tabulatus Cope, from the Linton, Ohio, Coal Measures. Original in American Museum of Natural History. × 2. art, articular; cor, coronoid; d, dentary; ang, angular; sa, surangular.

G. Skull elements and lateral-line canals of Erpetosaurus tabulatus Cope, from the Coal Measures of Linton, Ohio. × 1.5. fr, frontal; j, jugal; jl, jugal lateral-line canal; mx, maxilla: n, nasal; or, orbit; par, parietal; po, postorbital; pf, lacrimal or prefrontal; so, suborbital lateral-line canal; pp, postparietal; pmx, premaxilla; qj, quadratojugal; spo, supraorbital lateral-line canal; sq, squamosal; spt, supratemporal; tm, temporal lateral-line canal; tab, tabulare; so, supraoccipital cross-commissure of lateral-line canal.