452 BULLETIN 53, UNITED STATES NATIONAL MUSEUM. 



15456. Ogygia producta Hall and Whitfield. Cotypes. 



Middle Cambrian. East Canyon, Oquirrh Mountains, Utah. 



Hall and Whitfield, Rept. U. S. Geol. Expl. 40th Par., IV, Pt. II, 



1877, p. 244, pi. 2, figs. 31-34. 



See Bathyuriscus productus. 



15451. Ogygia ? spinosa Walcott. Holotype. 



Middle Cambrian. Secret Canyon, Eureka District, 

 Nevada. 



Walcott, Mon. VIII, U. S. Geol. Surv., 1S84, p. 63, pi. 9, fig. 22. 



= Zacauthoides spinosus. 

 See Olenoides spinosus. 



30205. Olcostephanus lindgreni Hyatt. Holot}^pe. 



Jurassic. Near Colfax, Placer County, California. 

 Hyatt, Bull. Geol. Soc. Amer., V, 1894, p. 427. 



23089. Olcostephanus (Simbirskites ) mutabilis Stanton. Cotypes. 



Knoxville (Lower Cret.). Five miles north of Paskenta, 

 California. 



Stanton, Bull. No. 133, U. S. Geol. Surv., 1895 (Feb., 1896), 

 p. 77, pi. 15, figs. 1-5. 



23090. Olcostephanus ( Polyptychites) trichotomus Stanton. 



Holotype. 

 Knoxville (Lower Cret. ). Two miles south of Lowerys, 

 Tehama County, California. 



Stanton, Bull. No. 133, U. S. Geol. Surv., 1895 (Feb., 1896), 

 p. 7S, pi. 16, fig. 1. 



33669. Oldhamia ( Murchisonites ) occidens Walcott. Cotypes. 



Upper Cambrian or Ordovician. Nassau Township, Rens- 

 selaer County, New York. 



Walcott, Proc. U. S. Nat. Mus., XVI, 1894, p. 314, fig. 1. 



15413. Olenellus asaphoides ( Emmons). Plesiotype. 



Lower Cambrian. Troy, New York. 



Walcott, Bull. No. 30, U. S. Geol. Surv., 1S86, p. 168, pi. 17, figs. 



3, 5. 6, 10; pi. 25. fig. S. 



See Olenellus (Mesonacis) asaphoides. 



15413. Olenellus * Mesonacis ) asaphoides (Emmons). Plesiotype. 

 18350. Lower Cambrian. Greenwich and Troy, New York. 



Walcott, Proc. U. S. Nat. Mus., XII, 18S9, p. 41; Tenth Ann. 

 Rept. U. S. Geol. Surv., 1S90, p. 637, pi. 88, figs. 1, ia, Je, ig; 

 pi. 89, figs. 1, ia; pi. 90, figs. 1, ia. 



See Olenellus asaphoides. 



18331. Olenellus < Holmia ) broggeri (Walcott). Cotypes. 



Lower Cambrian. Conception Bay, Newfoundland. 



Walcott, Tenth Ann. Rept. U. S. Geol. Surv., 1890, p. 638, pi. 

 91; fig. 1; pi. 92, figs. i-ih. 



See Olenellus (Mesonacis) broggeri. 



