A NEW LIMBLESS VERTEBRATE FROM THE PENNSYLVANIAN OF MAZON CREEK, ILLINOIS

[1] Camp CL, 1923, B AM MUS NAT HIST, V48, P289

[2] Cope E.D., 1871, P AM PHILOS SOC, V12, P177

[3] COPE ED, 1892, P AM PHILOS SOC, V30, P185

[4] COPE ED, 1875, PALEONTOLOGY, V2, P351

[5] DeBeer G., 1937, DEV VERTEBRATE SKULL

[6] GOODRICH ES, 1930, STUDIES STRUCTURE DE

[7] THE STRUCTURE OF CEPHALERPETON AND AFFINITIES OF THE MICROSAURIA [J]. AMERICAN JOURNAL OF SCIENCE, 1948, 246 (09) : 550 - 568

[8] Huxley T.H., 1867, T ROYAL IRISH ACAD, V24, P351

[9] Olson E.C., 1944, ORIGIN MAMMALS BASED, V55

[10] ROMER ALFRED S., 1930, BULL AMER MUS NAT HIST, V59, P77

[1] Camp CL, 1923, B AM MUS NAT HIST, V48, P289

[2] Cope E.D., 1871, P AM PHILOS SOC, V12, P177

[3] COPE ED, 1892, P AM PHILOS SOC, V30, P185

[4] COPE ED, 1875, PALEONTOLOGY, V2, P351

[5] DeBeer G., 1937, DEV VERTEBRATE SKULL

[6] GOODRICH ES, 1930, STUDIES STRUCTURE DE

[7] THE STRUCTURE OF CEPHALERPETON AND AFFINITIES OF THE MICROSAURIA [J]. AMERICAN JOURNAL OF SCIENCE, 1948, 246 (09) : 550 - 568

[8] Huxley T.H., 1867, T ROYAL IRISH ACAD, V24, P351

[9] Olson E.C., 1944, ORIGIN MAMMALS BASED, V55

[10] ROMER ALFRED S., 1930, BULL AMER MUS NAT HIST, V59, P77