228 
SELACnII. 
lig«. 24, 25. — C'arbouit'erous Limestone ; Govcnimeut of 
Toula, llussia. 
(?) Lopliodus reticulatus, J. W. Davis, Trans. Iloy. Dublin 8oo. [2] 
vol. i. (1883), p. 407, pi. li. fig. 22 ; Quart. Jouru. Gool. 
8oc. vol. xl. (1884), p. G20, pi. xxvii. fig. 2. — Yoredalo 
Hocks ; Wenslej-dalo, Yorkshire. 
Lophodus simtosus, J. W. Davis, Trans, lloj. Dublin Soc. [2] 
vol. i. (1883), p. 40b, pi. li. fig. 28. — -Upper Carboniferous 
Limestone ; Yorkshire. 
Vfiomalodus amjustus, J. 8. Newberry, Ann. Hep. Geol. Surv. 
Indiana, 1870-78 (1870), p. 342. — 8t. Louis Limestone; 
Indiana. 
Chomatodus arcuatus, 0. St. John, Proc. Amer. Phil. Soc. vol. xi. 
(1870), p. 435, and in Hayden’s Final Hep. Geol. Surv. 
Nebraska (1872), p. 243, pi. vi. fig. 14; St. John & 
Worthen, Pal. Illinois, vol. vi. (1875), id. x. fig. 23. — 
Upper Coal-Measures ; Nebraska and Iowa. 
Chumaiodus chestereusis, St. John & Worthen, Pal. Illinois, vol. vi. 
(1875), p. 363, pi. X. figs. 15-17. — Chester Limestone; 
Illinois. 
Cfioinatodiis compfus, St. John & Worthen, o^). cit. vol. vi. p. 356, 
pi. X. figs. 10-22. — Burlington Limestone; Iowa. 
Chomatodus (leyans, Newberry & Worthen, op. cit, vol. ii. p. 86, 
pi. V. fig. 18. — Keokuk Limestone ; Iowa. 
(?) Chomatodus iiiconstmis, St. John & Worthen, op. cit. vol. vi. 
p. 360, pi. X. figs. 5-14. — St. Louis Limestone ; Iowa. 
Chomatodus ohlhpius, J. S. Newberr}', loc. cit. p. 342. — St. Louis 
Limestone; Indiana. 
Chomatodus obscuncs, J. Leidy, Trans. Amer. Phil. Soc. [2] vol. xi. 
(1860), ]j. 80, pi. V. figs. 22, 23. — Carboniferous Lime- 
stone ; Illinois. [Tanaodus, St. John & Worthen.] 
Chomatodus sellifonnis, J. S. Newberry, loc. cit. p. 341. — St. 
Louis Limestone, Illinois. 
Chomatodus varsouvieiisis, St. John & Worthen, ojy. cit. vol. vi. 
p. 363, pi. X. figs. 1—4. — Warsaw Limestone; Illinois 
and Missouri. 
I eiiustodus aryutus, St. John & Worthen, op. cit. vol. vi. p. 352, 
id. ix. figs. 6, 6. — Chester Limestone; Illinois. 
I enustodus leidyi, St. John & Worthen, op. cit. vol. vi. p. 350, 
pi. ix. figs. 1-4 : Chomatodus venustus, J. Leidy, Trans. 
Amer. Phil. Soc. [2] vol. xi. (1857), p. 80, pi. v. figs. 19- 
21. — St. Louis Limestone ; Illinois and Missouri. 
Venustodus robustus, St. John & Woi'then, op. cit. vol. vi. p. 345, 
pi. ix. figs. 15-18. — Burlington Limestone ; Iowa. 
