422 BULLETIN 53, UNITED STATES NATIONAL MUSEUM. 



14370. Myalina nemesis Walcott. Cotype. 



Lower Carboniferous. Near Pinto Peak, Eureka District, 



Nevada. 



Walcott, Mon. VIII, U. S. Geol. Surv., 1884, p. 237, pi. 19, fig. 5; 

 pi. 22, fig. 7. 



1437 1. Myalina nessus Walcott. Cotype. 



Dower Carboniferous. Eureka District, Nevada. 



Walcott, Mon, VIII, U. S. Geol. Surv., 1884, p. 238, pi. 22, figs. 

 8, 8a. 



1022. Myalina perattenuata Meek and Hayden. Holotype and 



paratype. 

 Upper Carboniferous. ' ' Opposite north boundary of Mis- 

 souri, on the Missouri River ' ' = Region of Nemaha, 

 Nebraska. 



Meek and Hayden, Trans. Albany Inst., IV, 1858, p. 77; Pal. 

 Upper Mo., Smithsonian Cont. to Knowl., No. 172, XIV, 1864, 

 p. 32, pi. 1, figs. 12a, 12b. 



21727. Myalina perattenuata Meek and Haj-den. Plesiotype. 



Permian. Archer and Baylor counties, Texas. 



White, Bull. No. 77, U. S. Geol. Surv., 1891, p. 28, pi. 4, figs. 

 13-15- 



8933. Myalina permiana (Swallow). Plesiotypes. 



9445. Upper Carboniferous. Coyote and Cebolla creeks, and 



9456. Taos Peak, New Mexico. 



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

 1881, p. 25, pi. 3, figs, ia-id. 



15226. Myalina permiana (Swallow). Plesiotypes. 



Permian or Triassic. Southeast of Salt Lake City, Utah. 



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

 1877, p. 276, pi. 6, fig. 7. 



21726. Myalina permiana (Swallow). Plesiotype. 



Permian. Archer and Baylor counties, Texas. 



White, Bull. No. 77, U. S. Geol. Surv., 1891, p. 28, pi. 4, figs. 

 16-19. 



1 153. Myalina permiana (Swallow). Plesiotypes. 



Permian. Cottonwood Creek, Kansas. 



Meek and Hayden, Pal. Upper Mo., Smithsonian Cont. to Knowl., 

 No. 172, XIV, 1864, p. 52, pi. 2, figs. 7a-c. 



998. Myalina subquadrata Shumard. Plesiotypes. 



Upper Carboniferous. Leavenworth, Kansas. 



Meek and Hayden, Pal. Upper Mo., Smithsonian Cont. to Knowl., 

 No. 172, XIV, 1864, p. 33, text figs. A, B. 



35307. Myalina subquadrata Shumard. Plesiotypes. 



Rico (Upper Carb.). Scotch Creek, Rico quadrangle, 

 Colorado. 



Girty, Prof. Pap. No. 16, U. S. Geol. Surv., 1903, p. 424, pi. 8, 

 figs. 6, 7. 



