TYPE SPECIMENS OF INVERTEBRATE FOSSILS. 055 



41582. Tetradella quadrilirata (Hall and Whitfield). Plesiotypes. 



41583. Black River (Ord. ). Minnea]K)li.s, Mitine.sota. 

 vStones River (Ord.). Ili.i^li Bridj^e, Kentucky. 



Ulrich, Geol. and Nat. Hist. vSurv. Minn., I'iiial Rl']jI., Ill, Pt. II, 

 iSq4, p. 67S, pi. 46, fi^s- !->''• 



41584. Tetradella quadrilirata simplex (Ulrich). Plesiotype. 



Black River (Ord. ). Fountain, Minnesota. 



Ulrich, Geol. and Nat. Hist. vSiirv. Minn., l-inal Rept., Ill, Pi. II, 

 1894, p. 679, ])1. 46, fif^. II. 



41384. Tetradella subquadrans I'lrich. IlolotNpe. 



Trenton (Ord. ). Trenton Falls, New Yt)rk. 



Ulrich, Journ. Cincinnati Soo. Nat. Hist., XIII, 1S911, ]). 1 15, tfxt 

 figs. 2a-c. 



46011. Tetranota bidorsata (Hall). Plesiotype. 



Trentou (Ord.). Near Cannon Falls, Minnesota. 



Ulrich and vScofield, Geol. and Nat. Hist. Surv. Minn., Final 

 Rept., Ill, Pt. II, 1897, p. 877, pi. 65, figs. 10, II, 13-18. 



46012. Tetranota bidorsata minor Ulrich and vScofield. Cotypes. 



Black River (Ord.). vSt. Paul, Minnesota. 



Ulrich and Scofield, Geol. and Nat. Hist. vSnrv. Miun., Pinal 

 Rept., Ill, Pt. II, 1897, p. 878. 



46013. Tetranota macra Ulrich and Scofield. ' Holotype. 



Stones River (Ord.). Minneapolis, Minnesota. 



Ulrich and Scofield, Geol. and Nat. Hist. Surv. Minn., I'inal 

 Rept., Ill, Pt. II, 1897, p. 878, pi. 65, figs. I, 2. 



46014. Tetranota obsoleta Ulrich and vScofield. Cotypes. 



46015. Black River (Ord.). Chatfield and Cannon Falls, Minne- 



sota. 



Ulrich and Scofield, Geol. and Nat. Hist. Surv. Minn., I-'inal 

 Rei)t., HI, Pt. II, 1897, p. 880, pi. 65, figs. 19-23. 



46016. Tetranota sexcarinata Ulrich and vScofield. Cotypes. 



46017. Stones River ( Ord. ). Dixon, Illinois; Minneapolis, Miii- 



46018. ne.sota. 



Trenton (Ord.). Wykofi, Minnesota. 



Ulrich and Scofield, Geol. and Nat. Hist. Surv. Minn., P'inal 

 Rept., HI, Pt. II, 1897, p. 878, pi. 65, figs. 3-9. 



46019. Tetranota wisconsinensis (Whitfield). Plesiotyi)e. 



Stones River (Ord.). Minneapolis, Minnesota. 



Ulrich and Scofield, Geol. and Nat. Hist. Surv. Minn., I'inal 

 Rept., HI, Pt. II, 1897, p. 881, pi. 65, fig. 29. 



43366. Thamniscus divaricans Ulrich. Cotypes. 



Keokuk (Mi.ss.). Kings Mountain, Kentucky. 



Ulrich, Geol. Surv. III., VIII, 1890, p. 608, pi. 62, figs. 6-6c. 



