542 BULLETIN 53, UNITED STATES NATIONAL MUSEUM. 



6993. Productus punctatus (Martin). Plesiotypes. 



Upper Carboniferous. Nebraska City, Nebra.ska. 



Meek, Final Rept. U. S. Geol. Surv. Nebr. (Hayden), 1872, p. 169, 

 pi. 2, fig. 6; pi. 4, fig. 5. 



8467. Productus punctatus (Martin). Plesiotypes. 



8468. Upper Carboniferous. Grass Mountain, Ely Range, 



Nevada, and Madi.son County, Iowa. 



White, Rept. U. vS. Geogr. vSurv. W. looth Merid., IV, Pt. I, 1876, 

 p. 114, pi. 7, figs. 2a-2C. 



35180. Productus scabriculus (Martin). Plesiotype. 



Madi.son (Mi.ss.). Crowfoot Ridge, Gallatin Range, Yel- 

 lowstone National Park. 



Girty, Mon. XXXII, Pt. II, U. S. Geol. Surv., 1899, p. 531, pi. 69, 

 figs. 7a, 7b, 7c, 7d. 



1 506 1. Productus semireticulatus (Martin). Plesiotypes. 



Upper Carboniferous. West of Fort lyaramie, Wyoming. 



Hall, Stansbury's Expl. and Surv. Valley Great Salt Lake, Utah, 

 1852, p. 411, pi. 3, fig. 3. 



15059. Productus semireticulatus (Martin). Ple.siotypes. 



Upper Carboniferous. West of Fort Uaramie, Wj^oming. 



Hall, Stansbury's Expl. and Surv. Valley Great Salt Lake, Utah, 

 1852, p. 411, 1)1. 3, figs. 5a, 5b. 



= Productus cora. 



6532. Productus semireticulatus (Martin). Plesiotypes. 



Upper Carboniferous. Nebraska City, Nebraska. 



Meek, Final Rept. U. S. Geol. Surv. Nebr. (Hayden), 1S72, p. 160, 

 pi. 5, figs. 7a, 7b. 



8524. Productus semireticulatus (Martin). Plesiotj-pes. 



Upper Carboniferous. Southern Iowa. 



White, Rept. U. S. Geogr. Surv. W. looth Merid., IV, Pt. I, 1876, 



p. Ill, pi. 8, fig. TC. 



142 15. Productus semireticulatus (Martin). Ple.siotypes. 



Lower Carboniferous. North of Snowstorm Hill, Dry 

 Canyon, Oqiiirrh Mountains, Utah. 



Hall and Whitfield, Rept. U. S. Geol. Expl. 4()th Par., IV, Pt. 11, 

 1877, p. 267, pi. 5, figs. 5, 6. 



14299. Productus semireticulatus ( Martin). Plesiotypes. 



Upper Carl)oniferous. White Pine District, Nevada. 



Meek, Rept. U. S. Geol. Expl. 40th Par., IV, Pt. I, 1877, p. 69, 

 pi. 7, fig. 5. 



35181. Productus semireticulatus (Martin). Plesiotypes. 



35182. Madi.son (Miss.). Crowfoot Ridge, Gallatin Range, and 



Conant Creek, Teton Range, Yellow.stone National 

 Park. 



Girty, Mon. XXXII, Pt. II, U. S. Geol. vSurv., 1899, p. 535, 

 pi. 69, figs. 8a-8d. 



