266 BULLETIN 92, UNITED STATES NATIONAL MUSEUM. 



Conchldium occidentale Hall. 



Pentamenis occidentalis Hall, Pal. New York, 2, 1852, p. 341, pi, 79, figs. 1, 2.— 



Billings, Geol. Canada, 1863, p. 337, fig. 341.— Nicholson, Pal. Prov. Ontario, 



1875, p. 67, fig. 35.— ■V\Tiitfield, Geol. Wisconsin, 4, 1882, p. 314, pi. 17, fig. 10; 



pi. 23, figs. 1, 2.— Hall and Clarke, Pal. New York, 8, pt. 2, 1893, p. 239. 

 Concliidiiun(?) occidentalis Hall and Clarke, ibid., 1895, pi. 67, figs. 1-5. — Lesley, 



Geol. Surv. Pennsylvania., Rep. P 4, 1889, p. 618, fig: — Grabau and Shimer, 



N. A. Index Fossils, 1, 1907, p. 273, fig. 331. 

 Niagaran (Guelph): Gault and Guelph, Ontario; Point St. Vital, Lake Huron; 



Williamstown, Wisconsin. 



Conchldium scoparium Hall and Clarke. 



Conchidium scoparium Hall and Clarke, Pal. New York, 8, pt. 2, 1895, pi. 67, 

 figs. 6, 7; 48thi Rep. New York State Mus. for 1895, 2, 1897, p. 366, pi. 11, 

 figs. 8, 9; 14tli Rep. State Geol. New York for 1894, 1897, p. 366, pi. 11, figs. 

 8,9. 



Niagaran (Guelph): Durham, Ontario. 



Conchidium tenulcostatum (Hall and Whitfield). 



Pentamerus nysius var. tenuicosta Hall and "^Tiitfield, 24th Rep. New York 



State Cab. Nat. Hist., 1872, p. 184; 27th Rep., 1875, pi. 10, figs. 1-3. 

 Pentamerus complanatus Nettelroth, Kentucky Fossil Shells, Mem. Kentucky 



Geol. Survey, 1889, p. 53, pi. 27, figs. 14-16. 

 Conchidium tenuicostatus Hall and Clarke, Pal. New York, 8, pt. 2, 1893, p. 235. 



pi. G4, figs. 3-5.— Schuchert, Bull. U. S. Geol. Surv., 87, 1897, p. 187. 

 Niagaran (Louisville): Louisville, Kentucky. 

 Plesiotypes. — Cat. No. 51353, U.S.N.M. (Nettelroth's types of P. complanatus). 



Conchidium trilobatum Kindle and Breger. 



Conchidium trilobatum Kindle and Breger, 28th Ann. Rep. Dep. Geol. Nat. Res. 



Indiana, 1904, p. 436, pi. 5, figs. 1-3. 

 Niagaran: Huntington, Indiana. 

 Coiypes— Cat. No. 52933, U.S.N.M. 



Conchidium unguiforme (Ulrich). 



Gypidia unguiformis Ulrich, Contrib. Amer. Pal., 1886, p. 28, pi. 3, fig. 2. 



Gypidula unguiformis Miller, N. A. Geol. Pal., 1889, p. 346. 



Conchidium unguiformis Hall and Clarke, Pal. New York, 8, pt. 2, 1893, p. 235, 



pi. 6G, figs. 1-4.— Kindle and Breger, 28th Ann. Rep. Dep. Geol. Nat. Res. 



Indiana, 1904, p. 436, pi. 6, figs. 4, 5. 

 Niagaran: Louisville, Kentucky (Louisville); Carroll County, Indiana. 



CoNCHiTA RHOMBOiDALis Wilckcns. See Leptsena rhomboidalis. 



CONCHOPELTIS Walcott. Genotype: C. altemata Walcott. 



Conchopeltis Walcott, 28th Rep. New York State Mus. Nat. Hist., doc. ed., 



1875, p. 93; mus. ed., 1879, p. 93.— Miller, N. A. Geol. Pal., 1889, p. 400.— 



Ulrich and Scofield, Geol. Minnesota, 3, pt. 2, 1897, p. 823.— Berkey, Amer. 



Geol., 21, 1898, p. 278. 



Conchopeltis altemata Walcott. 



Conchopeltis altemata Walcott, 28th Rep. New York State Mus. Nat. Hist., doc. 



ed., 1875, p. 93; mus. ed., 1879, p. 93.— Ulrich and Scofield, Geol. Minnesota, 



3, pt. 2, 1897, p. 823, fig. 2. 

 Trenton: Trenton Falls, New York. 



Conchopeltis compkessa Miller. See Scenella compressa. 



