TYPE SPECIMENS OF INVERTEBRATE FOSSILS. 459 



9826. Orthis arachnoides Hall? Plesiotype. 



Carboniferous? Texas. Exact locality not given. 



Hall, Rept. U. S. Mexican Bound. Surv., Emory, I, Pt. II, 1857, 



pi. 20, figs. 3a, 3b. 

 [Either Schuchertella or Streptorhynchus, possibly of the Lower 

 Carboniferous of the El Paso region, Texas.] 



8547. Orthis biforata lynx (Eichwald). Plesiotypes. 



Richmond (Ord.). Silver City, New Mexico. 



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

 p. 74, pi. 4, %s. 9a, 9b. 



= Platystrophia lynx. 



6835. Orthis carbonaria Swallow. Plesiotypes. 



Upper Carboniferous. Rock Bluff near Nebraska City, 

 Nebraska. 



Meek, Final Rept. U. S. Geol. Surv. Nebr. (Hayden), 1872, p. 173, 

 pi. 1, figs. 8a-c. 



= Rhipidomella pecosi. 

 See Orthis pecosi. 



17887. Orthis disparilis Conrad. Plesiotype. 



Trenton (Ord.). Turkej^ River, Iowa. 



Owen, Rept. Geol. Surv. Wis., Iowa, and Minn., 1S52, pi. 2 B, 

 fig- 23. 



= Dalmanella testudinaria. 



24596. Orthis eurekensis Walcott. Cotypes. 



Middle Cambrian. Secret Canyon, Eureka District, 

 Nevada. 



Walcott, Mon. VIII, U. S. Geol. Surv., 1884, ] 22, pi. 9, figs. 8, 8a. 



= Orthis (Orusia?) eurekensis. 



17259. Orthis hamburgensis Walcott. Cotypes. 



Upper Pogonip (Ord.). Eureka District, Nevada. 



Walcott, Mon. VIII, U. S. Geol. Surv., 1884, p. 73, pi. 11, figs. 5, 5a. 

 = Dalmanella hamburgensis. 



24363. Orthis harttii Rathbun. Cotypes. 



Middle Devonian. Rio Maecuru, Brazil. 



Rathbun, Proc. Boston Soc. Nat. Hist., XX, 1878, p. 23. 

 = Rhipidomella harttii. 



15355. Orthis ? highlandensis Walcott. Cotype. 



Eower Cambrian. Near Pioche, Nevada. 



Walcott, Bull. No. 30, U. S. Geol. Surv., 1S86, p. 119, pi. S, figs. 

 3-3'D; Tenth Ann. Rept. U. S. Geol. Surv., 1890, p. 612, pi. 72, 

 figs. 5-5^. 



= Billingsella highlandensis. 



