544 BULLETIN 53, UNITED STATES NATIONAL MUSEUM. 



6868. Productus symmetricus McChesne}'. Plesiotj^pes. 



Upper Carboniferous. Rockford, near Nebraska City, 

 Nebraska. 



Meek, Final Rept. U. S. Geol. Surv. Nebr. (Hayden), 1S72, p. 167, 

 pi. 5, figs. 6a, 6b; pi. 8, fig. 13. 



1 1788. Productus symmetricus McChesney. Plesiotypes. 



Upper Carboniferous. La Salle County, Illinois. 



White, Thirteenth Ann. Rept. Geol. Surv. Ind., 1884, p. 123, pi. 25, 

 figs. I, 2. 



13821. Productus (Productella) truncatus (Hall). Plesiotype. 



Middle Devonian. Eureka District, Nevada. 



Walcott, Mon. VIII, U. vS. Geol. Surv., 1SS4, p. 131, pi. 14, fig. 2. 

 = Strophalosia truncata. 



14579. Proetus (Phaeton) denticulatus Meek. Cotypes. 



Middle Devonian. West side Steptoe Valley, Nevada. 



Meek, Rept. U. S. Geol. Expl. 40th Par., IV, Pt. I, 1877, p. 49, 

 pi. I, figs. lo-iob. 



= Phaethonides denticulatus. 



43021. Proetus haldemani Hall. Pla.stot5'pe. 



Hamilton (Dev.). Pennsylvania. 



Hall and Clarke, Nat. Hist. New York, Pal. VII, 1S88, p. 113, 

 pi. 21, figs. 7, 8. 



43016. Proetus hesione Hall. Plastotype. 



Schoharie (Dev.). Schoharie, New York. 



Hall and Clarke, Nat. Hist. New York, Pal. VII, 1S88, p. 93, 

 pi. 20, figs. 15, 16. 



14243. Proetus loganensis Hall and Whitfield. Holotype. 



Waverly (Miss. ). Dogan Canyon, Wahsatch Range, Utah. 



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

 1S77, p. 264, pi. 4, fig. 33.— Girty, Mon. XXXII, Pt. II, U. S. 

 Geol. Surv., 1899, p. 577, pi. 71, fig. 15a. 



43020. Proetus nevadae Hall and Clarke. Plastotype. 



Devonian. Combs Peak, luireka District, Nev^ada. 



Hall and Clarke, Nat. Hist. New York, Pal. VII, 188S, p. 129, 

 pi. 23, fig. 19. 



14242. Proetus peroccidens Hall and Whitfield. Cotypes. 



15236. Waverly (Mi.ss.). Dry Canyon, Oquirrh Mountains, and 



Ogden Canyon, Wasatch Range, Utah. 



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

 1877, p. 262, pi. 4, figs.. 28-32.— Girty, Mon. XXXII, Pt. II, 

 U. S. Geol. Surv., 1899, p. 576, pi. 71, figs. 14a, 1). 



43019. Proetus ? planimarginatus Meek. Plastotype. 



Devonian. Sylvania, Ohio. 



Meek, Geol. Surv. Ohio, Pal. I, 1873, p. 233, pi. 23, fig. 3. 



