BIBLIOGRAPHIC LIST OF GENERA AND SPECIES. 871 



Ohiocrlnus laxus Continued. 



Heterocrinus cehanus Miller, Cat. Amer. Pal. FOBS. (ed. 2), 1883, p. 283. 

 Ohiocrinus cehanus Wachsmuth and Springer, Proc. Acad. Nat. Sci. Philadelphia, 



1886, p. 133 (Rev. Pal., pt. 3, sec. 2, p. 209). 

 Maysville (Fairmount): Cincinnati, Ohio, and vicinity. 

 Plesiotype.C&t. No. 42304, U.S.N.M. (cotype of H. oehanus). 



OHIOCRINUS CEHANUS Wachsmuth and Springer. See Ohiocrinus laxus. 

 OHIOCRINUS VAUPELI Springer. See Ohiocrinus constrictus. 



OLDHAMIA Forbes. Genotype: 0. radiata Forbes. 



Oldhamia Forbes, Jour. Geol. Soc. Dublin, 4, 1848, p. 20. 



OLDHAMIA FRUTICOSA Hall. See Chsetomorpha? prima and Callithamnopsis fruticosa. 



Oldhamia (Murchisonites) occldens Walcott. 



Oldhamia (Murchisonites) occidens Walcott, Proc. U. S. Nat. Mus., 17, 1894, 



p. 314, fig.L Ruedemann, Bull. New York State Mus., 133, 1909, p. 210, fig. 



14. 

 Upper Cambrian or Lower Ordovician: Nassau Township, Rensselaer County, New 



York. 

 Cotypes.Cat. No. 33669, U.S.N.M. 



OLENUS ARCUATUS Goldfuss. See Triarthrus becki. 



OLENUS (PARABOLINELLA) LIMITIS Brogger. See Parabolinella limitis. 



OLENUS? LOGANI Devine. See Loganellus logani. 



OLENUS (SPELEROPHTHALMUS) PECTEN Salter. See Ctenopyge pecten. 



OLENUS (PARABOLINA) SPINULOSA Salter. See Parabolina spinulosa. 



OLENUS TRIARTHRUS Goldfuss. See Triarthrus becki. 



OLENUS UNDULOSTRIATUS Hall. See Proetus undulostriatus. 



OMOSPIRA Ulrich. Genotype: O. laticincta Ulrich. 



Murchisonia (part) Hall, Salter and Billings 



Omospira Ulrich, Geol. Minnesota, 3, pt. 2, 1897, pp. 932-944. Koken, Neues 



Jahrb. Min., Geol. Pal., 1, 1898, p. 15. 

 Ormospira Grabau and Shimer, N. A. Index Fossils, 1, 1909, p. 631. 



Omospira alexandra (Billings). 



Murchisonia ventricosa Salter (not Hall, 1847), Can. Org. Rem., Geol. Surv. Can- 

 ada, dec. 1, 1859, p. 23; pi. 5, figs. 2, 2a, 3. 



Murchisonia Alexandra Billings, Geol. Surv. Canada, Pal. Foss., 1, 1865, p. 172. 



Omospira alexandra Ulrich and Scofield, Geol. Minnesota, 3, pt. 2, 1897, p. 946, 

 pi. 70, figs. 66 and 67. 



Ormospira alexandra Grabau and Shimer, N. A. Index Fossils, 1, 1909, p. 631, 

 fig. 854d. 



Black River (Leray): Pauquette's Rapids, Ottawa River, Canada; Mercer 

 County, Kentucky. 



Plesiotypes. Cat. Nos. 45943, 45944, U.S.N.M. 



Omospira laticincta Ulrich. 



Omospira laticincta Ulrich, Geol. Minnesota, 3, pt. 2, 1897, p. 945, pi. 70, figs. 

 64, 65. 



