222 BULLETIN 5:5, UNITED STATES NATIONAL MUSEUM. 



24563. Dicellocephalus finalis Walcott. Cotypes. 



Upper Pogonip (Ord.)- Ridge east of Hamburg Ridge, 

 Eureka District, Nevada. 



Walcott, Mon. VIII, U. S. GeoL Surv., 1S84, p. 89, pL 12, figs, 

 12, 12a, 22. 



24569. Dicellocephalus flabellifer Hall aud Whitfield. Cotypes. 



Upper Cambriau. West side of Pogonip Mountain, White 

 Pine District, Nevada. 



Hall and Whitfield, Rept. IT. S. Geol. Expl. 4uth Par., IV, Pt. II, 

 1877, p. 227, pi. 2, figs. 29,30. 



8563. Dicellocephalus ? flagricaudus White. Cotypes. 



15452. IMiddle Cambrian. Schellbourne, vSchell Creek Range, 



Nevada. 



White, Prelim. Rept. U. vS. Geogr. Surv. W. looth Merid., 1874, 

 p. 12; Rept. U. vS. Geogr. Surv. W. 100th Merid., IV, Pt. I, 

 1877, p. 60, pi. 3, figs. 8a, 8b. 



= Zacanthoides flagricaudus. 

 See Olenoides? flagricaudus. 



15447. Dicellocephalus? gothicus Hall and Whitfield. Holotype. 

 Middle Cambrian. Canyon above Calls Fort, Wahsatch 

 Range, Utah. 



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

 1877, p. 242, pi. I, fig. 36. 



= Olenoides wahsatchensis. 



See Dicellocephaltis wahsatchensis. 



24564. Dicellocephalus inexpectans Walcott. Cotypes. 



Uower Pogcjnip ( Ord. ). Ridge ea.st of Hamburg Ridge, 

 Eureka District, Nevada. 

 Walcott, Mon. VIII, U. S. Geol. Surv., 1884, p. 90, pi. i, fig. 10. 



24566. Dicellocephalus iole Walcott. Cotypes. 



Upper Cambrian. Near Bulhvhacker Mine, Eureka Dis- 

 trict, Nevada. 

 Walcott, Mon. VIII, U. S. Geol. ,Surv., 1884, p. 43, pi. 10, fig. 19. 



17.S70. Dicellocephalus iowensis Owen. Cotypes. 



Middle Cambrian. Below mouth of Miniskah River, 

 Minnesota. 



Owen, Rept. Geol. Surv. Wis., Iowa, and Minn., 1852, p. 575, 

 pi. I, fig. 4. 



— Cre])icephalus ? iowen.sis. 



24565. Dicellocephalus marica Walcott. Cotypes. 



Upper Cambrian. Eureka District, Nevada. 



Walcott, Mon. VIII, U. S. Geol, Surv., 1884, p. 44, pl- "o, ^K- i.^^ 



