TYPE SPKOTMENS OF INVERTEBRATE B'OSSILS. 421 



2IO. Myacites nebrascensis Meek and Hayden. Holotype. 



Jurassic. Southwest base of Black Hills, South Dakota. 



Meek and Hayden, Proc. Acad. Nat. Sci. Phila., for i860, p. 182; 

 Pal. Upper Mo., Smithsonian Cont. toKnowl., No. 172, XIV, 

 1864, p. 100, pi. 4, fig. 5. 



8061. Myacites subcompressus Meek. Ple.siotypes. 



8180. Jura.ssic. I)e\ils vSlide, and near L,ower Canyon of Yellow- 



stone, Montana. 



White, Twelfth Ann. Rept. U. vS. Geol. Surv. Terr., Pt. I, 1883, 

 p. 151, pi. 3^, figs. 5a-e. 



200. Myacites subellipticus (Meek and Hayden^. Cotj^pes. 



Jura.ssic. Southwe.st base of Black Hills, Sotith Dakota. 



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

 No. 172, XIV, 1864, p. loi, pi. 4, figs. 6a-c. 



See Panopea (Myacites) subelliptica. 



13386. Myacites (Pleuromya) weberensis Meek. Holotype. 



Jurassic. Weber Canyon, Wahsatch Range, Utah. 



Meek, Rept. U. S. Geol. Expl. 40th Par., IV, Pt. I, 1877, p. 137, 

 pi. 12, figs. iia. 



2526. Myalina aviculoides Meek and Hayden. Cotypes. 



3961. Permian. Cottonwood Creek, Kansas. 



Meek and Hayden, Proc. Acad. Nat. Sci. Phila., for i860, p. 184; 

 Pal. Upper Mo., vSmith.sonian Cont. to Knowl., No. 172, XIV, 



1864, ]). 51, pi. 2, figs. 8a-d. 



15227. Myalina aviculoides Meek and Hayden. Plesiotypes. 



Permian or Tria.ssic. Sotitheast of Salt Lake City, Utah. 



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

 1877, P- 275, pl- 6, fig. 8. 



21696. Myalina aviculoides Meek and Hayden. Plesiotype. 



Permian. Godwin Creek, Ba^dor Count}', Texas. 



White, Rnll. No. 77, U. S. Geol. Surv., 1891, p. 28, pi. 2, fig. 12. 



14369. Myalina congeneris Walcott. Cotypes. 



Lower Carboniferous. Richmond Mountain, Etireka Dis- 

 trict, Nevada. 



Walcott, Mon. VIII, U. S. Geol. Surv., 1884, p. 237, pi. 19, fig. 6; 

 pi. 22, fig. 10. 



35310. Myalina cuneiformis Gurle}'. Plesiot3'pes. 



3531 1. Weber and llcrmosa ? (Upper Carb.). Ouray, and branch 



of Cement Creek, Crested Butte quadrangle, Colorado. 



Girty, Prof. Pap. No. 16, U. vS. Geol. vSurv., 1903, p. 420, pi. 8, 

 figs. 14-17. 



35306. Myalina keokuk Worthen. Plesiotype. 



Ouray (Miss.). Near Cascade Creek, Engineer Mountain 

 quadrangle, Colorado. 

 Girty, Prof, Pap. No. t6, U. vS. Geol. Surv., 1903, p. 309, pi. i, fig. 12. 



