$98 BULLETIN 92, UNITED STATES NATIONAL MUSEUM. 



Plectambonites tennesseensis Foerste. 



Plectambonites tennesseensis Foerste, Jour. Geol., 11, 1903, p. 708; Bull. Sci. 



Lab. Denison Univ., 14', 1909, p. 83, pi. 1, figs. 5 A-E. 

 Niagaran (Waldron): Iron City, Newsom, etc., Tennessee. 



Plectambonites transversalis (Wahlenberg). 



Anomites transversalis Wahlenberg, Act. Soc. Upsaliensis, 3, 1821, p. 64. 



Strophomena elegantula Hall, Geol. New York, Rep. 4th Dist., 1843, p. 72, fig. 

 1. Lesley, Geol. Surv. Pennsylvania, Rep. P 4, 1889, p. 1126, fig. 



Strophomena transversalis Hall, ibid., 1843, p. 105, fig. 4. Owen, Amer. Jour. Sci. 

 Arts, 48, 1845, p. 312, fig. 4. 



Leptsena transversalis Dalman, Kongl. Vet.-Akad. Handl., 1828, p. 109, pi. 1, 

 fig. 4. Hall, Pal. New York, 2, 1852, p. 256, pi. 53, fig. 5. Billings, Canadian 

 Nat. Geol., 1, 1856, p. 138, pi. 2, figs. 14, 15. Safford, Geol. Tennessee, 1869, 

 p. 315, fig. 12. Davidson, Mon. British Sil. Brach. Pal. Soc., 1871, p. 318, 

 pi. 48, figs. 1-9. Hall, 2d Ann. Rep. New York State Geol., 1883, pi. 46, 

 figs. 34-36. 



Plectambonites tenera Shaler, Bull. Mus. Comp. Zool., 4, 1865, p. 64. 



Lepteena transversalis var. elegantula Foerste, Proc. Boston Soc. Nat. Hist., 24, 

 1890, p. 294, pi. 6, fig. 6. 



Plectambonites transversalis Hall and Clarke, Pal. New York, 8, pt. 1, 1892, 

 p. 298, pi. 15, figs. 34-36. Foerste, Geol. Ohio, 7, 1895, p. 566, pi. 25, fig. 5; 

 pi. 30, fig. 13; pi. 31, fig. "6. Grabau, Bull. New York State Mus., 45, 1901, 

 p. 183, fig. 98; Bull. Buffalo Soc. Nat. Sci., 7, 1901, p. 183, fig. 90. Whiteaves, 

 Geol. Surv. Canada, Pal. Foss., 3, pt. 4, 1906, p. 251. Grabau and Shimer, 

 N. A. Index Fossils, 1, 1907, p. 227, fig. 275. 



Clinton-Niagaran : Europe; New York, Indiana, Wisconsin, Tennessee, etc.; 

 Ontario; New Brunswick and Anticosti; South America. 



Plectambonites transversalis alabamensis (Foerste). 



Leptsena transversalis var. alabamensis Foerste, Proc. Boston Soc. Nat. Hist., 



24, 1890, p. 296, pi. 5, fig. 9. 

 Plectambonites transversalis alabamensis Schuchert, Bull. U. S. Geol. Surv., 87, 



1897, p. 311. 

 Clinton: Collinsville, Alabama. 



Plectambonites transversalis prolongatus (Foerste). 



Leptaena prolongata Foerste, Bull. Sci. Lab. Denison Univ., 1, 1885, p. 79, pi. 13, 



fig. 5. 

 Leptsena transversalis var. prolongata Foerste, Proc. Boston Soc. Nat. Hist., 24, 



1890, p. 297, pi. 5, fig. 13. 

 Plectambonites transversalis prolongatus Schuchert, Bull. U. S. Geol. Surv., 87, 



1897, p. 311. 

 Upper Medinan (Brassfield): Dayton, Ohio; Wild wood Station, Georgia. 



PLECTOCERAS Hyatt. Genotype: Nautilus jason Billings. 



Plectoceras Hyatt, Proc. Boston Soc. Nat. Hist., 22, 1883, p. 268; Amer. Phil. Soc. 

 Proc., 32, 1894, p. 499. Miller, N. A. Geol. Pal., 2d App., 1897, p. 776. 

 Whiteaves, Geol. Surv. Canada Pal. Foss., 3, pt. 4, 1906, p. 299. Ruede- 

 mann, Bull. New York State Mus., 90, 1906, p. 482. Grabau and Shimer, 

 N. A. Index Fossils, 2, 1910, p. 72. 



Plectoceras bickmoreanum (Whitfield). 



Lituites Bickmoreanus Whitfield, Bull. Amer. Mus. Nat. Hist., 1, 1885, p. 191, 

 pi. 21, figs. 1-3. Newell, Proc. Boston Soc. Nat. Hist., 23, p. 485 (loc. occ.). 

 Lesley, Geol. Surv. Pennsylvania, Rep. P 4, 1889, p. 355, figs. 



