542 BULLETIN 53, UNITED STATES NATIONAL MUSEUM. 



6993. Productus punctatus (Martin). Plesiotypes. 



Upper Carboniferous. Nebraska City, Nebraska. 



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 Madison County, Iowa. 



White, Rept. U. S. Geogr. Snrv. W. 100th Merid., IV, Pt. I, 1876, 

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



35180. Productus scabriculus (Martin). Plesiotype. 



Madison (Miss.). Crowfoot Ridge, Gallatin Range, Yel- 

 lowstone National Park. 



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

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



15061. Productus semireticulatus (Martin). Plesiotypes. 



Upper Carboniferous. West of Fort Laramie, Wyoming. 



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

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



15059. Productus semireticulatus (Martin). Plesiotypes. 



Upper Carboniferous. West of Fort Laramie, Wyoming. 



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

 1S52, p. 411, pi. 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), 1872, p. 160, 

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



8524. Productus semireticulatus (Martin). Plesiotypes. 



Upper Carboniferous. Southern Iowa. 



White, Rept. U. S. Geogr. Surv. W. 100th Merid., IV, Pt. I, 1876, 

 p. in, pi. 8, fig. ic. 



142 15. Productus semireticulatus (Martin). Plesiotypes. 



Lower Carboniferous. North of Snowstorm Hill, Dry 

 Canyon, Oquirrh Mountains, Utah. 



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

 1S77, p. 267, pi. 5, figs. 5, 6. 



14299. Productus semireticulatus (Martin). Plesiotypes. 



Upper Carboniferous. White Pine District, Nevada. 



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

 pi. 7, fig. 5. 



351 81. Productus semireticulatus (Martin). Plesiotypes. 



35182. Madison (Miss.). Crowfoot Ridge, Gallatin Range, and 



Conant Creek, Teton Range, Yellowstone National 

 Park. 



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

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



