BIBLIOGRAPHIC LIST OF GENERA AND SPECIES. 311 



Ctenodonta subelliptlca Savage. 



Ctenodonta subelliptica Savage, Bull. Geol. Surv. Illinois, 23, 1913, p. 93, pi. 5, 



fig. 25. 

 Upper Medinan (Edgewood): Near Edgewood, Missouri. 



Ctenodonta subnasuta Ulrich. 



Ctenodonta subnasuta Ulrich, Geol. Minnesota, 3, pt. 2, 1894, p. 585, pi. 42, figs. 

 34-36. Whiteaves, Pal. Foss., Geol. Surv. Canada, 3, pt. 3, 1897, p. 185. 

 Schuchert, Proc. U. S. Nat. Mus., 22, 1900, p. 160, pi. 13, figs. 4-6. 



Trenton: Near Cannon Falls, Minnesota (Prosser); Lake Winnipeg and Baffin 

 Land, Canada. 



Holotype and plesiotype Cat. Nos. 46156, 28163, U.S.N.M. 



Ctenodonta subovata Whiteaves. 



Ctenodonta subovata Whiteaves, Ann. Rep. Geol. Surv. Canada, n. s., 14, App. F, 



1904, p. 47; Geol. Surv. Canada, Pal. Foss., 3, pt. 4, 1906, p. 256, pi. 27, 



figs. 9, 9a. 

 Niagaran: Ekwan River, Canada. 



Ctenodonta subrecta (Clarke). 



Tellinomya subrecta Clarke, Archives. Mus. Nac. Rio de Janeiro, 10, author's 



Eng. ed., 1900, p. 17, pi. 2, fig. 16. 

 Silurian: Rio Trombetas, Brazil. 



Ctenodonta subrotunda (Ulrich). 



Tellinomya subrotunda Ulrich, 19th Ann. Rep. Geol. Nat. Hist. Surv. Minnesota, 



1892, p. 219, fig. 5. 

 Ctenodonta subrotunda Hayes and Ulrich, U. S. Geol. Surv. Folio 95, illus. sheet, 



1903, figs. 40, 41. 

 Trenton: Mercer County, Kentucky (Curdsville) ; near Cannon Falls, Minnesota 



(Prosser); Tennessee (Bigby). 

 Holotype. Cat. No. 46157, U.S.N.M. 



Ctenodonta subtrigona (Simpson). 



Nucula subtrigona Simpson in Lesley, Geol. Surv. Pennsylvania, Rep. P 4, p. 472, 



figs.; Trans. Amer. Phil. Soc., n. s., 16, p. 452, fig. 20. 

 Clinton: Orbisonia, Huntington County, Pennsylvania. 



CTENOPLEUBON Matthew. Genotype: C. nerepisense Matthew. 



Ctenopleuron Matthew, Trans. Royal Soc. Canada, 3d ser., 1, sec. 4, 1907, p. 7. 



Jtenopleuron nerepisense Matthew. 



Ctenopleuron nerepisense Matthew, Trans. Royal Soc. Canada, 3d ser., 1, sec. 4, 

 1907, p. 7, 1 pi. 



Clinton??: Cunningham Brook, near Nerepis Station, Kings County, New Bruns- 

 wick. 



SNOPTERUS Clarke and Ruedemann. See Stylonurus subgenus Ctenopterus. 



'ENOPYGE Linnarsson. Genotype: Olenua (Sphserophthalmus) pecten Salter. 

 Ctenopyge Linnarsson, Geol. Foren. Stockholm Forh., 5, 1880, p. 145; Sver. Geol. 

 Unders., ser. C, No. 43, 1880, p. 15. Brogger, Die sil. Etagen 2-3, Kristiania, 

 1882, p. 113. Zittel, Handb. d. Pal., 2, 1885, p. 596. Matthew Trans. Royal 

 Soc. Canada, 9, sec. 4, 1892, p. 55. Koken, Die Leitfossilien, Leipzig, 1896, 

 p. 20, fig. 11; figs. 7, 14. Lindstrom, Kongl. Sven. Vet.-Akad. Handl., No. 8, 

 1901, pp. 26, 29. Lake, Paleontcgraphical Soc., 1913, p. 78. 



