TYPE SPECIMENS OF INVERTEBRATE FOSSILS. 555 



9447. Ptilodictya triangulata White. Plesiotypes. 



Upper Carboniferous. Cebolla and Coyote creeks, New 

 Mexico. 



White, Rept. U. S. Geogr. Surv. W. 100th Merid.,111, Suppl. 1881, 

 p. 24, pi. 4, fig. B. 



= Prismopora triangulata. 



43418. Ptilodictya variabilis Ulrich. Figured section of plesiotype. 

 Richmond (Ord.). Blanchester, Ohio. 



Ulrich, Geol. Surv. 111., VIII, 1890, p. 304, fig. 2a; p. 319, fig. 6a. 

 = Ptilodictya nodosa. 



43476. Ptilodictya whiteavesi Ulrich. Figured section of cotype. 

 Richmond (Ord.). Stony Mountain, Manitoba. 



Ulrich, Geol. Surv. Canada, Contr. Micro-Pal. Cambro-Sil., Pt. II, 

 1889, p. 44, pi. 8, figs. i-ie. 



43786. Ptilopora cylindracea Ulrich. Cotypes. 



Keokuk (Miss.). Kings Mountain, Kentucky. 



Ulrich, Geol. Surv. 111., VIII, 1890, p. 623, pi. 66, figs. 2, 2b. 



43432. Ptilopora paupera Ulrich. Cotypes. 



Keokuk (Miss.). Kings Mountain, Kentucky. 

 Ulrich, Geol. Surv. 111., VIII, 1890, p. 624, pi. 66, fig. 10. 



43787. Ptilotrypa obliquata Ulrich. Cotypes and figured sections. 



Richmond (Ord.). Wilmington, Illinois. 



Ulrich, Geol. Surv. 111., VIII, 1890, p. 531, pi. 30, figs, ib, id, ie. 



2457S. Ptychaspis minuta Whitfield? Plesiotype. 



Upper Cambrian. Lookout Mountain, Eureka District, 

 Nevada. 



Walcott, Mon. VIII, U. S. Geol. Surv., 1884, p. 60, pi. 10, 

 fig- 23. 



24579. Ptychaspis pustulosa Hall and Whitfield. Cotypes. 



Upper Cambrian. West side of Pogonip Mountain, White 

 Pine District, Nevada. 



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

 1877, p. 223, pi. 2, fig. 27. 



21704. Ptychites cummingsi White. Cotype. 



Permian. Military Crossing of the Big Wichita, Baylor 

 County, Texas. 



White, Amer. Nat., XXXIII, 1889, p. 117, pi. 1, figs. 4-8. 

 = Waagenoceras cummingsi. 



12324. Ptychoceras crassum Whitfield. Cotypes. 



Fort Pierre (Cret.). Old Woman Fork, Black Hills, 

 Wyoming. 



Whitfield, Rept. Geol. and Resources Black Hills Dakota, 1880, 

 p. 459, pi. 16, figs. 3, 4, 6. 



