710 BULLETIN 92. UNITED STATES NATIONAL MUSEUM. 



Leptaena nitens (Billings). 



Strophomena nitens Billings, Canadian Nat. GeoL, 5, 1860, p. 53, fig. 1; Pal. 



Foss., 1, Geol. Surv. Canada, 1865, p. 118, fig. 97 (adv. sheets, 1862); Geol. 



Canada, 1863, p. 209, fig. 208. Lesley, Geol. Surv. Pennsylvania, Rep. P 4, 



1890, p. 1130, figs. 



Rafinesquina nitens Hall and Clarke, Pal. New York, 8, pt. 1, 1892, p. 283. 

 Leptaena nitens Whiteaves, Pal. Foss., Geol. Surv. Canada, 3, pt. 2, 1895, p. 120. 

 Richmond: Charleton Point, etc., Anticosti (Charletoii and English Head and 



Gamachian); Stony Mountain, Manitoba (Stony Mountain); Wyoming; etc. 



LEPTSENA OBSCURA Hall. See Rafinesquina obscura. 



LEPT.EXA ORTHIDIDEA Hall. See Strophomena? orthididea. 



LEPT.ENA PATEXTA Hall. See Strophonella patenta. 



LEPTJEXA PLANOCONVEX A Hall. See Strophomena planoconvexa. 



LEPT^ENA PLANUMBOXA Hall. See Strophomena planurnbomi. 



LEPTJEXA PLICATELLA Ulrich. See Plectambonites plicatellus. 



LEPT^EXA PLICIFERA Hall. See Leptsena incrassata. 



LEPT.EXA PRECOSIS Sardeson. See Plectambonites precosis. 



LEPTSENA PROFUNDA Hall. See Stropheodonta profunda. 



LEPT^EXA PROLONGATA Foerste. See Plectambonites transversalis prolongatus. 



LEPT^ENA QUADRILATERA Shaler. See Leptsena rhomboidalis. 



* 



LEPT^EXA RECEDENS Sardeson. See Plectambonites recedens. 

 LEPT^NA RECTA Hall. See Dinorthis (Plsesiomys) deflecta. 



Leptaena reticulata (Shaler). 



Strophomena reticulata Shaler, Bull. Mus. Comp. Zool., 4, 1865, p. 62. 

 Richmond (Charleton) and Gamachian (Ellis Bay) : Ellis Bay, Anticosti. 



Leptsena rhomboidalis (Wilckens). 



Conchita rhomboidalis Wilckens, Nachrict von selten Yersteinerungen, 1769, p. 



77, pi. 8, figs. 43, 44. 



Anomites rhomboidalis Wahlenberg, Acta Soc. Upsala, 3, 1821, p. 65. 

 Strophomena undulosa Conrad, 5th Ann. Rep. Geol. Surv. New York, 1841, p. 54. 

 Strophomena depressa Vanuxem, Geol. New York, Rep. 3d Dist., 1842, p. 79, 



fig. 5. Hall, ibid., Rep. 4th Dist., 1843, p. 77, fig. 5; p. 104, fig. 2. Billings, 



Canadian Nat. Geol., 1, 1856, p. 59, pi. 1, fig. 5. Roemer, Sil. Fauna West, 



Tennessee, 1860, p. 65, pi. 5, fig. 2. Lesley, Geol. Surv. Pennsylvania, Rep. 



P 4, 1890, p. 1126, figs. 

 Strophomena undulatus Vanuxeni, Geol. New York, Rep. 3d Dist., 1842, p. 139, 



fig. 3. Hall, ibid., Rep. 4th Dist., 1843, p. 175, fig. 3. Yandell and Shumard, 



Cont. Geol. Kentucky, 1847, p. 11. 

 Productus? sulcatus Castelnau, Essai Syst. Sil. I'Amerique Septentrionale, 1843, 



p. 39, pi. 13, i: 



Productus sulcifer de Verneuil, ibid., 1843, p. 39. 

 Leptsena depressa Hall, Pal. New York, 2, 1852, p. 62, pi. 21, fig. 8; p. 2 



53, fig. 6. Rogers, Geol. Pennsylvania, 2, pt. 2, 1858, p. 823, fig. 630. 



