TYPE SPECIMENS OF INVERTEBRATE FOSSILS. 223 



17872. Dicellocephalus miniscaensis Owen. Cotype. 



Middle Cambrian. Near mouth of Miniskah River, Minne- 

 sota. 



Owen, Rept. Geol. Surv. Wis., Iowa, and Minn., 1852, p. 574, 

 pi. iA, fig. 5. 



= Ptychaspis miniscaensis. 



17863. Dicellocephalus minnesotensis Owen. Cotypes. 



Upper Cambrian. Lake St. Croix, above Stillwater, Min- 

 nesota. 



Owen, Rept. Geol. Surv. Wis., Iowa, and Minn., 1852, p. 574, 

 pi. 1, figs. 1, 2, 10. 



See Dicellocephalus pepinensis. 



24640. Dicellocephalus multicinctus Hall and Whitfield. 



Holotype. 

 Upper Cambrian. Eureka District, Nevada. 



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

 1877, p. 226, pi. 2, fig. 37. 



24607. Dicellocephalus nasutus Walcott. Cotypes. 



Middle Cambrian. New York Canyon, Eureka District, 

 Nevada. 

 Walcott, Mon. VIII, U. S. Geci. Surv., 1884, p. 40, pi. 10, fig. 15. 

 = Anomocare nasutus. 



24659. Dicellocephalus osceola Hall. Plesiot3'pe. 



Upper Cambrian. North of Dunderberg Mine, Eureka 

 District, Nevada. 



Walcott, Mon. VIII, U. S. Geol. Surv., -884, p. 40, pi. 9, fig. 25. 



17867. Dicellocephalus pepinensis Owen. Cotypes. 



17868. Upper Cambrian. La Grange Mountain, head of Lake 



Pepin, Minnesota. 



Owen, Rept. Geol. Surv. Wis., Iowa, and Minn., 1S52, p. 574, pi. 1, 

 figs. 9a, 9b; pi. iA, fig. 7. (Also pi. 1, fig. 10 as D. minneso- 

 tensis.) 



15448. Dicellocephalus quadriceps Hall and Whitfield. Cotypes. 



Middle Cambrian. Ute Peak, Wahsatch Range, Utah. 



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

 1877, p. 240, pi. 1, figs. 37-40. 



= Olenoides quadriceps. 



15449. Dicellocephalus quadriceps Hall and Whitfield. 



Plesiotypes. 

 Middle Cambrian. Eureka District, Nevada. 



Walcott, Mon. VIII, U. S. Geol. Surv., 1884, p. 45, pi. 9, fig. 24. 

 = Olenoides quadriceps. 



