HAY.] 



CATALOGUE. 



287 



Helodus limax Newb. and Worth. 

 Newberry aad Worthen 1866 A, p. 80, pi. v, figs. 



5-56. 

 Woodward, A. S. 1889 1), p. 226. 



Subcarboniferous (Burlington); Iowa. 



Helodus politus Newb. and Worth. 



Xewberry and Worthen 1866 A, p. 79, pi. v, fig. 2. 

 Woodward, A. S. 1889 D, p. 227. 



Subcarboniferous (Keokuk); Illinois. 



Helodus rugosus Newb. and Worth. 



Sewberry and Worthen 1870 A, p. 359, pi. ii, figs. 



10, 10a. 



Woodward, A. S. 1889 D, p. 227. 

 Coal-measures; Illinois. 



Helodus sulcatus Newb. and Worth. 

 Newberry and Worthen 1866 A, p. 83, pi. v, figs. 16, 



16a. 

 Woodward, A. S. 1889 D, p. 221. 



Subcarboniferous (Keokuk); Illinois. 



Helodus undulatus Newb. and Worth. 

 Newberry and Worthen 1866 A, p. 82, pi. v, figs. 8-86. 

 Woodward, A. S. 1889 D, p. 227. 



Subcarboniferous (Keokuk); Illinois. 



Helodus wortheni Hay. 



Hay, 0. P. 1899 E, p". 784. 



Newberry and Worthen 1870 A, p. 360, pi. iii, figs. 

 15, 15a. (Helodus compressus; not H. com- 

 pressus Newberry and Worthen 1866 A, p. 78, 

 pi. v, fig. l=Hybocladodus compressus.) 

 Subcarboniferous (Burlington); Illinois. 



VENUSTODUS St. J. and Worth. Type Chomatodus venustus Leidy. 



St. John and Worthen 1875 A, p. 344. 

 Miller, S. A. 1889 A, p. 613. 

 Woodward, A. S. 1889 D, pp. 218-225. 

 1889 F, p. 298. 



Venustodus argutus St. J. and Worth. 

 St. John and Worthen 1875 A, p. 352, pi. ix, figs. 5, 6. 

 Lesley, J. P. 1890 A, p. 1250, figures. 

 Woodward, A. S. 1889 D, p. 228. 



Subcarboniferous (Chester); Illinois. 



Venustodus robustus St. J. and Worth. 

 St. John and Worthen 1875 A. p. 345, pi. ix, figs. 



15-18. 



Lesley, J. P. 1890 A, p. 1261, figures. 

 Miller, S. A. 1889 A, p. 614, fig. 1177. 

 Woodward, A. S. 1889 D, p. 228. 



Subcarboniferous (Burlington); Iowa. 



Venustodus tenuicristatus St. J. and 



Worth. 



St. John and Worthen 1875 A, p. 348, pi. ix, figs. 

 19-24. 



Keyes, C. R. 1894 A, p. 230. 

 Lesley, J. P. 1890 A. p. 1251, figures. 

 Woodward, A. S. 1889 D, p. 229. 



Subcarboniferous (Keokuk): Illinois, Iowa, 

 Missouri. 



Venustodus variabilisSt. J. and Worth. 

 St. John and Worthen 1875 A, p. 346y pi. ix, figs. 7-14. 

 Lesley, J. P. 1890 A, p. 1252, figures. 

 Woodward, A. S. 1889 D, p. 229. 



Subcarboniferous( Burlington); Illinois.Iowa. 



Venustodus venustus (Leidy). 



Leidy, J. 1857 H, p. 89, pi. v, figs, 19-21. (Choma- 

 todus.) 



Hambach, G. 1890 A, p. 81. (V.leidyi.) 



Lesley, J. P. 1890 A, p. 1250, figures. (V. leidyi.) 



Miller, S. A. 1889 A, pp. 590, 613, 614. 



Newberry and Worthen 1866 A, p. 34. 



St. John and Worthen 1875 A, pp. 345, 350, pi. ix, 

 figs. 1-4. (V. leidyi.) 



Woodward, A. S. 1889 D, p. 228. (V. leidyi.) 

 Subcarboniferous (St. Louis); Illinois, Mis- 

 souri. 



XENODUS S. A. Miller. Type Goniodus hertzeri Newb. 



Xenodus hertzeri (Newb.). 



Miller, S. A. 1892 A, p. 718. 



Hay, O. P. 1899 E, p. 784. 



Newberry, J. S. 1889 A, p. 67. (Goniodus, not of 



Newberry, J. S. 1889 A, p. 69, pl.xxvii, figs. 11-15. 



(Goniodus.) 

 Miller, S. A. 1892 A, p. 718. 



Devonian (Huron Shale); Ohio. 



PERIPLECTRODUS St. J. and Worth. Type P. warreni St. J. and AVorth. 



St. John and Worthen 1875 A, p. 324. 

 Miller, S. A. 1889, p. 605. 

 Woodward, A. S. 1889 D, p. 228. 



Periplectrodus compressus St. J. and 



AVorth. 



St. John and Worthen 1875 A, p. 326, pi. viii, figs. 



26-26c. 



Lesley, J. p. 1889 A, p. 622, figures. 

 Woodward, A. S. 1889 D, p. 229. 



Subcarboniferous (St. Louis); Illinois. 



Periplectrodus expansus St. J. and 

 Worth, 



I St. John and Worthen 1876 A, p. 327, pi. viii, figs. 

 ' 27-27C. 



Lesley, J. P. 1889 A, p. 623, figures. 



Woodward, A. S. 1889 D, p. 229. 



Subcarboniferous (Chester); Illinois. 



Periplectrodus warreni St. J. and 



Worth. 

 St. John and Worthen 1875 A, p. 325, pi. viii, figs. 



25-25c. 



Lesley, J. P. 1889 A, p. 624, figures. 

 Woodward, A. S. 1889 D, p. 229. 



Subcarboniferous (Burlington); Iowa. 



