TYPE SPECIMENS OF INVERTEBRATE FOSSILS. 559 



15434. Ptychoparia piochensis Walcott. Cotype. 



Middle Cambrian. Near Pioche, Nevada. 



Walcott, Bull. No. 30, U. vS. Geol. Surv., 1886, p. 201, pi. 26, figs. 

 2-2b; pi. 28, fig.s. T-ie. 



15441. Ptychoparia? prospectensis Walcott. Holotype. 



lyOwer Camljrian. Pro.spect Peak, luireka District, 

 Nevada. 



Walcott, Mon. VIII, U. vS. Geol. vSurv., 1884, p. 46, pi. 9, fig. 20; 

 Bull. No. 30, V. vS. Geol. >Surv., 1886, p. 202, pi. 27, fig. 5. 



15432. Ptychoparia quadrans (Hall and Whitfield). Cotypes. 



Middle Cambrian. Box Elder Canyon, Wahsatch Moun- 

 tains, Utah. 



Walcott, Bull. No. 30, U. vS. Geol. vSurv., 1886, p. 199, pi. 29, figs. 

 4-4b. 



vSee Crepiceplialus? (Loganellus) quadrans. 



24641. Ptychoparia similis Walcott. Cotype. 



ITpper Cambrian. Secret Canj'on, Ivureka Di.strict, 

 Nevada. 



Walcott, Mou. VIII, U. vS. Geol. vSurv., 1884, p. 52, pi. 10, fig. 10. 



24609. Ptychoparia similis robustus Walcott. Holotype. 



Upper Cambrian. Secret Canyon, Eureka District, 

 Nevada. 



Walcott, Mon. VIII, U. S. Geol. Surv., 1884, p. 53, pi. i, fig.s. 9, 9a. 



23860. Ptychoparia suada Walcott. Holotype. 



Upper Cambrian. Morgans Creek, Burnett County, 

 Texas. 

 Walcott, Proc. U. S. Nat. Mus., XIII, 1890, p. 274, pi. 21, fig. 9. 



15442. Ptychoparia subcoronata (Hall and Whitfield). Cotypes. 



Lower Cambrian. Ute Peak, Wahsatch Range, Utah. 



Walcott, Bull. No. 30, U. vS. Geol. Surv., 1886, p. 205, pi. 28, fig. 4; 

 Tenth Ann. Rept. U. S. Geol. Surv., 1890, p. 652, pi. 96, fig. 6. 



See Conocephalites sttbcoronatus. 



15436. Ptychoparia teucer (Bilhngs). Plesiotype. 



Lower Cambrian. Near Highgate Springs, Vermont. 



Walcott, Bull. No. 30, U. S. Geol. Sur\\, 1886, p. 197, pi. 26, fig. 3; 

 Tenth .\nii. Rept. U. S. Geol. Surv., 1890, p. 652, pi. 96, fig. 3. 



23861. Ptychoparia? urania Walcott. Cotypes. 



Upper Cambrian. Packsaddle Moinitain, Llano Count}', 

 Texas. 

 Walcott, Proc. V. S. Nat. Mus., XIII, 1890, p. 274, pi. 21, figs. 10, 11. 



15437. Ptychoparia vulcanus (Billings). Plesiotype. 



Lower Cambrian. Georgia, Vermont. 



Walcott, Bull. No. 30, U. S. Geol. Surv., 1886, p. 198, pi. 26, fig. 4; 

 Tenth Ann. Rept. U. S. Geol. Surv., 1890, p. 653, pi. 96, fig. 4. 



