TYPE SPECIMENS OF INVERTEBRATE FOSSILS. 321 



43575- Homotrypa (?) similis Foord. Plesiotypes and figured 



sections. 

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



Ulrich, Geol. and Nat. Hist. Surv. Minn., Final Rept., Ill, Pt. I, 

 1893, p. 242, pi. 20, figs. 2S-33. 



41761. Homotrypa splendens Bassler. Cotypes and figured sections. 

 Richmond (Ord.). Wilmington, Illinois. 



Bassler, Proc. U. S. Nat. Mus., XXVI, 1903, p. 587, pi. 25, figs. 

 n-14. 



43570. Homotrypa subramosa Ulrich. Cotypes and figured 



sections. 

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



Ulrich, Geol. and Nat. Hist. Surv. Minn., Final Rept., Ill, Pt. I, 

 1893, p. 239, pi. 19, figs. 21-28. 



43580. Homotrypa tuberculata Ulrich. Cotypes and figured 



sections. 

 Black River (Ord.). Cannon Falls, Minnesota. 



Ulrich, Geol. and Nat. Hist. Surv. Minn., Final Rept., Ill, Pt. I, 

 1893, p. 240, text fig. 14. 



41766. Homotrypa wortheni (James). Plesiotypes and figured 



sections. 

 Richmond (Ord.). Richmond, Indiana. 



Bassler, Proc. U. S. Nat. Mus., XXVI, 1903, p. 583, pi. 24, figs. 

 10-14. 



41768. Homotrypa wortheni intercellata Bassler. Cotypes and 



figured sections. 

 Richmond (Ord.). One-fourth mile east of Osgood, 

 Indiana. 



Bassler, Proc. U. S. Nat. Mus., XXVI, 1903, p. 584, pi. 24, fig. 17. 



41767. Homotrypa wortheni prominens Bassler. Cotypes. 



Richmond (Ord.). Elkhorn Cfeek, near Richmond, 

 Indiana. 



Bassler, Proc. U. S. Nat. Mus., XXVI, 1903, p. 584, pi. 24, figs. 

 15-16. 



43763. Homotrypella contexta Ulrich. Fragment and figured 



sections of holotype. 

 Richmond (Ord.). Wilmington, Illinois. 



Ulrich, Geol. Surv. 111., VIII, 1890, p. 412, pi. 32, figs. 5a, 5b. 



43561. Homotrypella instabilis Ulrich. Cotypes and figured 



sections. 

 Black River (Ord.). Minneapolis, Minnesota. 



Ulrich, Geol. and Nat. Hist. Surv. Minn., Final Rept., Ill, Pt. 

 I, 1893, p. 229, pi. 18, figs. 9-20. 



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