8 PROCEEDINGS OF THE NATIONAL MUSEUM vol.72 



Bryantodus subbrevis Ulbioh and Bassler, 1926 (p. 28, pi, 10, figs. 15, 16). 



Mississippian, Hardin sandstone at base of Cliattanooga shale, Mount 



Pleasant, Tenu. 

 Bryantodus subradiatus Uuuch and Bassler, 1926 (p. 26, pi. 10, figs. 12, 



13). Mississippian, Hardin sandstone at base of Chattiinooga shale. Mount 



Pleasant, Tenn. 

 Bryantodus tenuis Ulbich and Bassi^ek, 1926 (p. 26, pi. 10, fig. 7). Missis- 

 sippian, Hardin sandstone at base of Chattanooga shale, Mount Pleasant, 



Tenn. 

 Bryantodus transitans Ulkich and Bassles, 1926 (p. 20, pi. 4, figs. 10, 11). 



Upper Devonian, Rhinestreet shale of the Portage group, Shaleton, Erie 



County, N. Y. 

 Bryantodus tridentatus Ulbich and Bassler, 1926 (p. 22, pi. 6, fig. 13). 



Upper Devonian, Rhinestreet shale of Portage group, Shaleton, Erie County, 



N. Y. 

 Bryantodus ty pious Ulrich and Bassi-eb, 1926 (p. 21, figs. 11, 12). Upper 



Devonian, Rhinestreet shale of Portage group, Shaleton, Erie County, N. Y. 

 Centrodus Pander, 1856. See Lonchodus Pander, 1856. 

 Centrodus convexus Pander., 1858. See Lonchodus convexus. 

 Centrodus distans Smith, 1907. See LoiicJwdus distans. 

 Centrodus duplicatus Hindb, 190O. See Hindeodslla duplicata. 

 Centrodus ereclus Smith, 1907. See Lonchodus ereotus. 

 Centrodus invaUdus Bryant, 1921. See Prioniodella invaUda. 

 Centrodus Uneatus Hinde, 1900. See Hmdeodella lineata. 

 Centrodus oUiquus Smith, 1907. See Lonchodus ohliquus. 

 Centrodus princeps Bryant, 1921. See Lonchodus princeps. 

 Centrodus simplex Pander, 1856. See Lmtchodus simplex. 

 Cordylod'us Pander, 1856 (p. 33). Genotype (first species) : Cordylodus angu- 



latus Pander, 1856. 

 Cordylodus angulatus Pander, 1856 (p. 33, pi. 2, figs. 26-31, 34). Lower Ordov 



vician, Baltic Provinces. 

 Cordylodus ramosus Hadding, 1913 (p. 31, pi. 1, fig. 6). Ordovician Dicello- 



graptus zone, southern Norway. 

 Cordylodus rotundatus Pandeh, 1856 (p. 33, pi. 2, figs. 32, 33). Lower Ordo- 

 vician, Baltic Provinces. 

 Cornuramia Smith, 1907 (p. 246) ; Ulbich and Bassler, 1926 (p. 41). Geno- 

 type : Cornuramia monodonta Smith, 1907. 

 Cornuramia Mcornua Smith, 1907 (p. 251, pi. 9, fig. 49). Ordovician, Arenig- 



Llandeilo, southern uplands of Scotland. 

 Cornuramia diplodonta Smith, 1907 (p. 246, pi. 5, fig. 25). Ordovician, Arenig- 



Llandeilo, Ravengill, Scotland. 

 Co7'nuramia monodonta Smith, 1907 (p. 246, pi. 6, fig. 20). Ordovician, Arenig- 



Llandeilo, Ravengill, etc., Scotland. 

 Ctenognathus Pander., (1856, p. 32) ; Ulrich and Bassler, 1926 (p. 54) Roundy, 



1926 (p. 16). Genotype: Ctenognathus murchisom Pander, 1856. 

 Ctenognathus kayserUngii Pander, 1856 (p. 32, pi. 2A, fig. 15). Carboniferous 



limestone, Tula, Russia. 

 Ctenognathus murchisoni Pandeoj, 1856 (p. 32, pi. 4, fig. 17; pi. 6, figs. ISff, h). 



Silurian, Rootsikiille, Russia. 

 Ctenognathus ohliquus Pander, 1856. See Eindeodella oMiqua. 

 Ctenognathus ve>-neuilU Pander, 1856 (p. 32, pi. 4, fig. 18; pi. 2A, figs. 13, 14, 



16, 17). Devonian, Wells on the Wolchow, Russia. Species of Valeyitia, 



Prioniodina, and Eindeodella are represented by these illustrations. 



