. TYPE SPECIMENS OF INVERTEBRATE FOSSILS. 185 



46139. Ctenodonta nasuta (Hall). Plesiotype. 



Black River (Ord.). Six miles south of Cannon Falls, 

 Minnesota. 



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

 1894, p. 584, pi. 42, fig. 30. 



46140. Ctenodonta nasuta robusta Ulrich. Holotype. 



Black River (Ord.). Paquette Rapids, Ottawa River, 

 Canada. 



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

 1894, p. 585. 



See Tellinoniya nasuta. 



46141. Ctenodonta nitida (Ulrich). Cotypes. 



Black River (Ord.). Minneapolis, Minnesota. 



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

 1894, p. 59 2 , pl- 42, figs. 44-49- 



See Tellinomya nitida. 



46142. Ctenodonta obliqua (Hall). Plesiotypes. 



46143. Richmond (Ord.). Scales Mound, Illinois. 

 L,orraine (Ord.). Cincinnati, Ohio. 



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

 1894, p. 604, pl. 42, figs. 83-87. 



46144. Ctenodonta oviformis Ulrich. Holotype. 



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



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

 1894, p. 586, pl. 42, fig. 29. 



46145. Ctenodonta perminuta Ulrich. Cotypes. 



Utica (Ord.). Cincinnati, Ohio. 



Ulrich, Geol. Surv. Ohio, VII, 1893, p. 680, pl. 46, figs. 11-14. 



46146. Ctenodonta planodorsata (Ulrich). Holotype and 



plesiotypes. 

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



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

 1894, p. 589, pl. 37, figs. 25-28; pl. 42, figs. 38-40. 



See Tellinomya planodorsata. 



46147. Ctenodonta recurva (Ulrich). Cotypes. 



Richmond (Ord.). Near Spring Valley, Minnesota. 



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

 1894, p. 603, pl. 42, figs. 98-101. 



See Tellinomya recurva. 



46148. Ctenodonta regia Ulrich. Cotypes. 



Trenton (Ord.). Near Burgin, Kentucky. 



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

 1894, p. 585. 



